{"total":114,"papers":[{"filename":"Spaet, Mourier, and Rummer 2026.pdf","name":"Spaet, Mourier, and Rummer 2026","year":2026,"url":"https://rummerlab.com/papers/Spaet%2C%20Mourier%2C%20and%20Rummer%202026.pdf","title":"Inclusive Science for a changing ocean: gender equity in elasmobranch research","authors":["Julia L. Y. Spaet","Johann Mourier","Jodie L. Rummer"],"journal":"Frontiers in Fish Science","doi":"10.3389/frish.2026.1816786","abstract":"Persistent inequities in marine science continue to shape who leads research, whose work is most visible, and which questions are prioritised. In elasmobranch science, a field often defined by intensive fieldwork and long-standing cultural norms, these dynamics have direct consequences for scientific capacity and conservation outcomes. Drawing on a decade of global publication data alongside existing scholarship, this Perspective evaluates how gender representation has changed within elasmobranch research and where structural barriers remain. Authorship patterns across more than twelve thousand peer reviewed publications indicate meaningful gains in participation by women, particularly at early career stages and in lead authorship. Progression into sustained senior authorship position remains uneven, reflecting institutional and cultural constraints rather than lack of expertise. These patterns align with broader evidence of leaky career pathways that continue to privilege narrow models of authority. Rather than framing equity as a matter of representation alone, we argue that inclusion is fundamental to the intellectual robustness of elasmobranch science. Diverse leadership expands the scope of inquiry, strengthens collaboration, and improves conservation relevance. As pressures on shark and ray populations intensify, retaining and empowering diverse scientific talent is not optional. It is essential. We call for coordinated structural reform across institutions, funding systems, publishing practices, and field operations to ensure that elasmobranch science reflects the diversity of expertise required to meet accelerating ocean challenges.","published":"2026-08-14","volume":"4"},{"filename":"Peele et al., 2026 Brain, Behavior, and Evolution.pdf","name":"Peele et al., 2026 Brain, Behavior, and Evolution","year":2026,"url":"https://rummerlab.com/papers/Peele%20et%20al.%2C%202026%20Brain%2C%20Behavior%2C%20and%20Evolution.pdf","title":"The Role of Temperature in Shaping the Nervous System Phenotype in the Epaulette Shark (<i>Hemiscyllium ocellatum</i>)","authors":["Emily E. Peele","Carolyn R. Wheeler","Jennifer T. Wyffels","Jodie L. Rummer","John W. Mandelman","Kara E. Yopak"],"journal":"Brain, Behavior and Evolution","doi":"10.1159/000550398","abstract":"Introduction: Over the last century, sea surface temperatures have increased by more than 0.5°C, with predictions suggesting an increase of 1–4°C by 2100. Oceanic warming poses significant challenges to marine species, particularly those with physiological and developmental processes that are tightly linked to environmental conditions. In cartilaginous fishes, including sharks, the brain grows continually throughout life, supported by the capacity for lifelong neurogenesis. This feature suggests that the nervous system – both peripheral (sensory) and central (brain) – of sharks may be highly plastic and able to adapt dynamically to a changing environment. Methods: We investigated the effects of elevated rearing temperature on brain development in the epaulette shark (Hemiscyllium ocellatum), a species known for its tolerance of environmental fluctuations in intertidal habitats. Eggs (n = 12) were sourced from a breeding stock at the New England Aquarium and reared in either ambient (27°C) or elevated (31°C, 4°C above ambient) seawater temperatures until 2 months post-hatch. Using histological analyses, we compared the relative volume of the nose (olfactory rosette), total brain, and major brain regions between treatment groups. Results: Despite this species’ natural exposure to temperature variability, generalized linear models revealed that elevated temperature significantly altered the volume of the olfactory sensory epithelium, olfactory bulbs, and medulla oblongata after accounting for overall brain size. Analyses of proportional brain region volumes also showed that elevated temperature was associated with reduced olfactory bulb size and increased subpallial volume relative to total brain size. These differences may suggest potential changes in cognitive capacity related to olfactory processing as well as sensory and/or motor functions at elevated temperatures. Conclusions: While short-term studies, such as this one, cannot capture long-term adaptive potential, understanding the impacts of elevated temperature on brain phenotypes provides critical insights into how elasmobranchs may cope with changing ocean conditions. Such knowledge will be vital for predicting the resilience of these ecologically important species to future environmental stressors.","published":"2026-01-13","volume":"101","issue":"2","pages":"90-110"},{"filename":"Lionnet et al., 2025 JFB.pdf","name":"Lionnet et al., 2025 JFB","year":2025,"url":"https://rummerlab.com/papers/Lionnet%20et%20al.%2C%202025%20JFB.pdf","title":"A blacktip's black tip: The reliability of using dorsal‐fin patterns for photo identification of blacktip reef sharks (<i>Carcharhinus melanopterus</i>)","authors":["Laetitia A. M. G. Lionnet","Shamil F. Debaere","Hugo Heuls","Johann Mourier","Serge Planes","Jodie L. Rummer"],"journal":"Journal of Fish Biology","doi":"10.1111/jfb.70114","abstract":"AbstractPhoto identification (photo ID) has increasingly become a valuable technique serving not only to identify individual animals but also to monitor populations, track migration patterns and assess wildlife health, among others uses. Various species of sharks are amenable to photo ID, among which the blacktip reef shark (Carcharhinus melanopterus) is a particularly suitable subject. Their distinctive pigmentation and dorsal‐fin patterns serve as potential key identifying features. This study focuses on the variation in dorsal‐fin patterns among individual neonatal and juvenile C. melanopterus around Moorea, French Polynesia. We employed a Gower distance matrix to assess dissimilarities in dorsal‐fin patterns and conducted an elliptical Fourier analysis (EFA) to characterize shape variations. The results from the EFA were further summarized using principal component analyses. Additionally, we explored the potential symmetry between the left and right sides of the dorsal fin. To assess the long‐term reliability of using pigmentation patterns for photo ID, dorsal‐fin patterns of recaptured individuals were compared using regressions of log‐transformed dorsal‐fin measurements over log‐transformed pre‐caudal lengths. Recaptures occurred over varying time frames, ranging from as short as 2 weeks to as long as 9 months. The diverse range allowed us to evaluate the temporal stability of dorsal‐fin patterns across different intervals. The analyses revealed that each individual shark's dorsal‐fin pattern is unique, but the left and right sides are asymmetrical. Regarding the analysis of recaptured individuals, the ontogenetic changes in dorsal‐fin size were not significant enough to alter the dorsal‐fin patterns, thus ensuring their temporal stability. The application of photo ID techniques, as demonstrated in this study, underscores its indispensable role in conservation strategies, promoting a deeper understanding of elasmobranch species.","published":"2025-10","volume":"107","issue":"4","pages":"1224-1236"},{"filename":"Hasenei et al., 2025.pdf","name":"Hasenei et al., 2025","year":2025,"url":"https://rummerlab.com/papers/Hasenei%20et%20al.%2C%202025.pdf","title":"A novel, nonlethal liver biopsy procedure in an elasmobranch","authors":["AM Hasenei","L Foyle","Jodie L. Rummer"],"journal":"Australian Veterinary Journal","doi":"10.1111/avj.13432","abstract":"Tissue sampling is essential for understanding the biology, health and conservation status of elasmobranchs (i.e., sharks and rays). Historically, these samples have been obtained through recreational and commercial fisheries or via fisheries‐independent sampling, often involving lethal methods. However, with a significant number of elasmobranch species listed as conservation concerns under IUCN standards — approximately one‐third of species are threatened with extinction — there is an urgent need for nonlethal tissue sampling techniques to optimise animal care and further conservation research. Recent advances have demonstrated nonlethal liver sampling in teleost fishes, but this has rarely been attempted in elasmobranchs. Yet, in elasmobranchs, the liver is one of the largest organs, performing critical functions such as buoyancy regulation, energy storage and metabolic processes. Here, we present a nonlethal liver biopsy procedure in an elasmobranch species, the epaulette shark (Hemiscyllium ocellatum). Individual sharks were wild‐collected from coastal waters of Queensland, Australia and maintained in holding facilities at James Cook University and Heron Island Research station where all procedures took place. Following surgery, the sharks made a full recovery, accepted food within 24 hours, and were monitored for 2 weeks before being released back to their original collection sites after complete healing. This study aimed to showcase these methods as a foundation for improved veterinary care and conservation science, while also advocating for the broader adoption of nonlethal sampling techniques in both research and clinical practice to promote sustainability and ethical conservation efforts.","published":"2025-07","volume":"103","issue":"7","pages":"407-410"},{"filename":"Wheeler et al., 2025 Biology Open.pdf","name":"Wheeler et al., 2025 Biology Open","year":2025,"url":"https://rummerlab.com/papers/Wheeler%20et%20al.%2C%202025%20Biology%20Open.pdf","title":"Assessing the metabolic and physiological costs of oviparity in the epaulette shark (<i>Hemiscyllium ocellatum</i>)","authors":["Carolyn R. Wheeler","Cynthia A. Awruch","John W. Mandelman","Jodie L. Rummer"],"journal":"Biology Open","doi":"10.1242/bio.062076","abstract":"ABSTRACT\n Reproduction in chondrichthyan fishes (sharks, rays, skates, and chimaeras) is generally assumed to be a long-term, energetically costly process, given their slow generation times. However, metabolic costs of reproduction remain poorly understood due to a lack of direct, non-lethal measurements. To address this, we investigated metabolic and physiological changes during oviparous reproduction in five female epaulette sharks (Hemiscyllium ocellatum). We tracked oxygen uptake rates – a proxy for metabolic rate – across a 3-week cycle, capturing data before, during, and after egg case encapsulation and oviposition. We also measured reproductive hormones (testosterone, 17β-estradiol, progesterone) and hematological parameters (hematocrit, hemoglobin concentration). Results revealed a positive but non-significant relationship between metabolic rate and body mass, and contrary to expectations, metabolic rate did not significantly change throughout the 19-day cycle. Hormone levels remained stable, except for a transient testosterone peak early in the cycle, and hematological parameters showed no significant variation. These findings tentatively suggest epaulette sharks maintain reproductive effort without marked increases in metabolic or physiological costs. Continued research under seasonal environmental variation could clarify reproductive energetics in chondrichthyans further. This study provides the first direct measurement of metabolic effects of oviparous reproduction in chondrichthyans, challenging assumptions about energetic demands in this taxon.","published":"2025-11-15","volume":"14","issue":"11"},{"filename":"McInturf et al., 2025 Ecology and Evolution .pdf","name":"McInturf et al., 2025 Ecology and Evolution ","year":2025,"url":"https://rummerlab.com/papers/McInturf%20et%20al.%2C%202025%20Ecology%20and%20Evolution%20.pdf","title":"Catch Data Can Unravel Elasmobranch Aggregation Dynamics and Group Behaviours","authors":["A. G. McInturf","M. Cantor","I. A. Bouyoucos","T. K. Chapple","S. F. Debaere","K. Eustache","J. Mourier","S. Planes","J. A. Sulikowski","K. W. Zillig","N. A. Fangue","Jodie L. Rummer"],"journal":"Ecology and Evolution","doi":"10.1002/ece3.71107","abstract":"ABSTRACTElasmobranchs (i.e., sharks, skates, rays), known for their cognitive abilities and complex behaviours, often form aggregations that are thought to be crucial for their survival and evolutionary success. However, understanding the drivers behind these aggregations remains challenging due to the dynamism of the marine environment and the difficulty of observing these species directly. Here, we aim to address these challenges by introducing a methodological framework for analysing catch data to infer aggregation behaviour. Within this framework, we outline key metrics to explore, such as the number and density of individuals captured, phenotypic traits, drivers of co‐occurrence, individual identification, and kin structure. We then demonstrate how to use this framework in a case study of juvenile blacktip reef sharks (Carcharhinus melanopterus) in Moorea, French Polynesia, to determine its real‐world application and identify potential limitations. Our results reveal that juvenile blacktip reef sharks around Moorea tend to aggregate during early life stages and that these aggregations appear non‐social, indicative of environmental rather than social drivers. We also find that, while catch data can provide valuable insights into elasmobranch aggregations, they must be complemented with targeted research methods to maximise the available data advised within our framework. As findings from our case study demonstrate, this framework has the capacity to broaden our knowledge of elasmobranch aggregations and social behaviours, underscoring the importance of dedicated efforts in research and conservation to manage these vulnerable species effectively.","published":"2025-04","volume":"15","issue":"4"},{"filename":"Dubuc et al., 2025 JEB.pdf","name":"Dubuc et al., 2025 JEB","year":2025,"url":"https://rummerlab.com/papers/Dubuc%20et%20al.%2C%202025%20JEB.pdf","title":"Harnessing physiological research for smarter environmental policy","authors":["Alexia Dubuc","Courtney M. Burns","Shamil F. Debaere","Carmen Dobszewicz","Joel H. Gayford","Jodie L. Rummer"],"journal":"Journal of Experimental Biology","doi":"10.1242/jeb.249867","abstract":"ABSTRACT\n Integrating physiological research into environmental policy is crucial for addressing the complex challenges faced by ecosystems. Despite their potential, physiological insights are often underutilised in policy and management decisions, leading to missed opportunities for more targeted and effective conservation strategies. This Perspective explores the role and integration of physiological research within environmental policy. We discuss successful case studies where physiological data have informed policy, as well as the barriers that hinder broader recognition and application of this research. Key challenges include the limited awareness of physiological findings among policymakers, the difficulties in translating complex scientific data into actionable policy, and the gap between physiological studies and ecological relevance. To bridge these gaps, we propose strategies for making physiological research more accessible and impactful, such as fostering interdisciplinary collaborations, enhancing science communication and aligning research with policy needs. We conclude with a call to action for researchers, institutions, policymakers and Indigenous communities – especially Traditional Custodians – to collaborate more closely, advocating for the inclusion of physiological expertise in advisory panels and the development of strategies to better incorporate physiological research into environmental policy. By embracing the insights provided by conservation physiology, we can develop more informed and effective policies that enhance the resilience of ecosystems in the face of rapid environmental change.","published":"2025-04-15","volume":"228","issue":"8"},{"filename":"Gayford et al., 2024 Evolution and Development.pdf","name":"Gayford et al., 2024 Evolution and Development","year":2025,"url":"https://rummerlab.com/papers/Gayford%20et%20al.%2C%202024%20Evolution%20and%20Development.pdf","title":"Heterochrony and Oophagy Underlie the Evolution of Giant Filter‐Feeding Lamniform Sharks","authors":["Joel H. Gayford","Duncan J. Irschick","Andrew Chin","Jodie L. Rummer"],"journal":"Evolution & Development","doi":"10.1111/ede.12496","abstract":"ABSTRACTEvolutionary transitions toward gigantic body sizes have profound consequences for the structure and dynamics of ecological networks. Among elasmobranchs (sharks and rays), gigantism has evolved on several occasions, most notably in the iconic Megalodon (Otodus megalodon†) and the extant whale shark (Rhincodon typus), basking shark (Cetorhinus maximus), and megamouth shark (Megachasma pelagios), all of which reach total lengths exceeding 6 m and, in some cases, reach 21 m or more. Comparative phylogenetic studies suggest that filter feeding and heterothermy provide two alternative evolutionary pathways leading to gigantism in sharks. These selection‐based explanations for gigantism are important; however, our understanding of evolutionary transitions in body size is fundamentally constrained without a proximate, mechanistic understanding of how the suite of adaptations necessary to facilitate gigantism evolved. Here we propose the heterochrony hypothesis for the evolution of the giant filter‐feeding shark ecomorphotype. We suggest that craniofacial adaptations for oophagy in embryonic stages of lamniform sharks are retained through ontogeny in C. maximus and M. pelagios by paedomorphosis, resulting in an enlarged head and mouth relative to the rest of the body, even in adulthood. This change in developmental timing enables these taxa to optimize prey acquisition, which is thought to be the limiting factor for the evolution of gigantism in filter‐feeding marine vertebrates. We discuss the concordance of this hypothesis with current developmental, morphological, and evolutionary data, and we suggest future means by which the hypothesis could be tested.","published":"2025-03","volume":"27","issue":"1","scholar_pub_id":"ynWS968AAAAJ:0CzhzZyukY4C","scholar_citations":0},{"filename":"Temple et al., 2025 NPJ Ocean Sustainability.pdf","name":"Temple et al., 2025 NPJ Ocean Sustainability","year":2025,"url":"https://rummerlab.com/papers/Temple%20et%20al.%2C%202025%20NPJ%20Ocean%20Sustainability.pdf","title":"Opportunities to enhance conservation success for sharks","authors":["Andrew J. Temple","Jesse E. M. Cochran","Agathe Pirog","Nicholas K. Dulvy","Enric Cortés","Simon Weigmann","Hollie Booth","Carolyn R. Wheeler","Brittany Finucci","Alifa Bintha Haque","Michael R. Heithaus","Issah Seidu","Jodie L. Rummer","Michael L. Berumen"],"journal":"npj Ocean Sustainability","doi":"10.1038/s44183-025-00131-8","published":"2025-05-16","volume":"4","issue":"1"},{"filename":"Trujillo et al., 2025 Conservation Physiology.pdf","name":"Trujillo et al., 2025 Conservation Physiology","year":2025,"url":"https://rummerlab.com/papers/Trujillo%20et%20al.%2C%202025%20Conservation%20Physiology.pdf","title":"Safety in the shallows: nearshore coastal habitats can provide physical and thermal features that optimize escape performance in newborn blacktip reef sharks (<i>Carcharhinus melanopterus</i>)","authors":["José E. Trujillo","Ian A. Bouyoucos","Ornella C. Weideli","Elena M C Milanesi","Shamil F. Debaere","William J. Rayment","Serge Planes","Paolo Domenici","Jodie L. Rummer","Bridie J M Allan"],"journal":"Conservation Physiology","doi":"10.1093/conphys/coaf045","abstract":"Abstract\n The prevailing shark nursery paradigm suggests that high survival in these habitats is primarily driven by reduced predator encounters: so-called pre-encounter risk. In this study, we propose an alternative or complementary mechanism: that some nurseries may lower post-encounter risk by providing environmental conditions that maximize escape performance. To test this hypothesis, we examined how temperature, depth and habitat complexity influence the escape performance of newborn blacktip reef sharks (Carcharhinus melanopterus) in Mo′orea, French Polynesia. In a controlled setting, we exposed 48 newborn sharks to four temperature treatments (25, 27, 29 and 31°C) and measured fast-start acceleration, turning rate and latency to respond to a stimulus. We also calculated aerobic scope at 27, 29 and 31°C, as greater aerobic scope is associated with faster recovery from burst swimming. Our results show that warmer temperatures improve escape performance, with 29% higher acceleration, 9% faster turning rates and 48% shorter reaction times at elevated temperatures. Furthermore, aerobic scope remained ≥80% of its maximum capacity between 27.5 and 30.8°C, suggesting that newborn sharks can sustain high metabolic performance within this thermal window. Field measurements at nursery habitats revealed that daily thermal fluctuations generally remained within this optimal aerobic scope range, meaning that newborns can maintain high escape performance for most of the day. Additionally, high-resolution mapping confirmed that previously reported home ranges were associated with shallow (median depth = 0.74 m), structurally complex reef flats dominated by coral substrate. The combination of reduced hydrodynamic drag in shallow water and increased manoeuvrability in complex habitats likely enhances predator evasion. However, extreme warming events that exceed critical thermal limits may trigger behavioural trade-offs that compromise escape performance and elevate predation risk. Our findings suggest that these nurseries provide habitat-specific advantages for predator evasion, reinforcing their critical role in the survival of newborn sharks.","published":"2025-01-01","volume":"13","issue":"1"},{"filename":"Debaere et al., 2025 J Fish Biology.pdf","name":"Debaere et al., 2025 J Fish Biology","year":2025,"url":"https://rummerlab.com/papers/Debaere%20et%20al.%2C%202025%20J%20Fish%20Biology.pdf","title":"The costs and healing rates of minor injuries in neonatal reef sharks","authors":["Shamil F. Debaere","Ornella C. Weideli","Ryan Daly","Elena M. C. Milanesi","José E. Trujillo","Ian A. Bouyoucos","Johann Mourier","Andrew Chin","Serge Planes","Gudrun De Boeck","Jodie L. Rummer"],"journal":"Journal of Fish Biology","doi":"10.1111/jfb.16059","abstract":"Abstract\n \n Elasmobranch fishes (i.e., sharks, skates, and rays) exhibit remarkable wound‐healing capabilities and consistently maintain a high capacity for tissue regeneration throughout their lives. This high capacity for wound healing may be particularly important for neonatal elasmobranchs that are still developing their immune system. However, little is known about the costs associated with wound healing and the potential influence of environmental variables or life history. In this study, we explore (1) the impact of minor, external injuries on the growth and body condition of neonatal blacktip reef (\n Carcharhinus melanopterus\n ) and sicklefin lemon (\n Negaprion acutidens\n ) sharks using a long‐term fisheries‐independent dataset from Moorea, French Polynesia, (2) the influence of ambient temperature on healing rates in neonatal blacktip reef sharks at two experimental temperatures (25°C and 29°C), and (3) variations in umbilical wound‐healing rates between blacktip reef and sicklefin lemon sharks using an additional long‐term dataset from St. Joseph Atoll, Seychelles. We found no impact of minor, external injuries on growth and body condition in neonatal blacktip reef and sicklefin lemon sharks, accelerated umbilical wound healing in neonatal blacktip reef sharks exposed to elevated ambient temperatures, and distinct umbilical wound‐healing rates between neonatal blacktip reef and sicklefin lemon sharks. Enhancing our understanding of sharks' healing capabilities and the influence of environmental factors on this process is crucial for informing handling practices aimed at improving post‐release survival rates of captured sharks under current and future oceanic conditions.","published":"2025-06","volume":"106","issue":"6","pages":"1777-1788","scholar_pub_id":"ynWS968AAAAJ:4xDN1ZYqzskC","scholar_citations":0},{"filename":"Gayford and Rummer, 2025 Reviews in Fish Biology and Fisheries.pdf","name":"Gayford and Rummer, 2025 Reviews in Fish Biology and Fisheries","year":2025,"url":"https://rummerlab.com/papers/Gayford%20and%20Rummer%2C%202025%20Reviews%20in%20Fish%20Biology%20and%20Fisheries.pdf","title":"Tonic immobility in cartilaginous fishes (Chondrichthyes): function, evolutionary history, and future directions","authors":["Joel H. Gayford","Jodie L. Rummer"],"journal":"Reviews in Fish Biology and Fisheries","doi":"10.1007/s11160-025-09958-3","abstract":"Abstract\n Tonic immobility, a temporary cessation of voluntary movements, is a widespread phenomenon within the animal kingdom. While commonly regarded as an ‘anti-predator’ defence strategy, empirical evidence supporting this hypothesis is predominantly limited to terrestrial vertebrates. In Chondrichthyes (i.e., sharks, rays, and chimaeras), tonic immobility has also been proposed as an anti-predator mechanism, despite a dearth of evidence and fundamental physiological distinctions from terrestrial counterparts. Here, we present data regarding tonic immobility induced by dorsoventral inversion across 13 chondrichthyan species. We also perform a review of the existing literature to identify temporal, taxonomic, and methodological trends in TI research. Then, using phylogenetic comparative methods, we demonstrate that this trait is plesiomorphic to Chondrichthyes and has been independently lost multiple times throughout chondrichthyan phylogeny. Contrary to expectations, we find no significant correlation between the evolutionary transitions in tonic immobility and major ecological axes of variation in Chondrichthyes. Our findings challenge existing hypotheses and suggest that tonic immobility may lack adaptive significance in extant chondrichthyans, persisting through chondrichthyan phylogeny due to minimal net fitness costs. Additionally, we propose an association between the loss of tonic immobility and entanglement risk in shallow-water benthic ecosystems. Our results provide unprecedented insights into the evolutionary history of this enigmatic behaviour within Chondrichthyes and across the phylogeny of jawed vertebrates.","published":"2025-09","volume":"35","issue":"3","pages":"1301-1315"},{"filename":"Rummer, 2024 Chapter 11 in Fish Physiology.pdf","name":"Rummer, 2024 Chapter 11 in Fish Physiology","year":2024,"url":"https://rummerlab.com/papers/Rummer%2C%202024%20Chapter%2011%20in%20Fish%20Physiology.pdf","title":"45 years of “The respiratory and circulatory systems during exercise” in Fish Physiology, as per David R. Jones and David J. Randall","authors":["Jodie L. Rummer"],"book":"Fish Physiology","doi":"10.1016/bs.fp.2024.05.001","published":"2024","pages":"399-414","scholar_pub_id":"ynWS968AAAAJ:vDZJ-YLwNdEC","scholar_citations":0},{"filename":"Rummer, 2024.pdf","name":"Rummer, 2024","year":2024,"url":"https://rummerlab.com/papers/Rummer%2C%202024.pdf","title":"45 years of “The respiratory and circulatory systems during exercise” in Fish Physiology, as per David R. Jones and David J. Randall","authors":["Jodie L. Rummer"],"book":"Fish Physiology","doi":"10.1016/bs.fp.2024.05.001","published":"2024","pages":"399-414","scholar_pub_id":"ynWS968AAAAJ:vDZJ-YLwNdEC","scholar_citations":0},{"filename":"Debaere et al., 2024 JEB.pdf","name":"Debaere et al., 2024 JEB","year":2024,"url":"https://rummerlab.com/papers/Debaere%20et%20al.%2C%202024%20JEB.pdf","title":"Bridging the divide in organismal physiology: a case for the integration of behaviour as a physiological process","authors":["Shamil F. Debaere","April Grace R. Opinion","Bridie J. M. Allan","Jodie L. Rummer","Gudrun De Boeck"],"journal":"Journal of Experimental Biology","doi":"10.1242/jeb.247685","abstract":"ABSTRACT\n The role of behaviour in animal physiology is much debated, with researchers divided between the traditional view that separates physiology and behaviour, and a progressive perspective that sees behaviour as a physiological effector. We advocate for the latter, and in this Commentary, we argue that behaviour is inherently a physiological process. To do so, we outline the physiological basis for behaviour and draw parallels with recognised physiological processes. We also emphasise the importance of precise language that is shared across biological disciplines, as clear communication is foundational in integrating behaviour into physiology. Our goal with this Commentary is to set the stage for a debate and persuade readers of the merits of including behaviour within the domain of animal physiology. We argue that recognising behaviour as a physiological process is crucial for advancing a unified understanding of physiology, especially in the context of anthropogenic impacts.","published":"2024-11-15","volume":"227","issue":"22","scholar_pub_id":"ynWS968AAAAJ:6yz0xqPARnAC","scholar_citations":0},{"filename":"Downie et al., 2024 Coral Reefs.pdf","name":"Downie et al., 2024 Coral Reefs","year":2024,"url":"https://rummerlab.com/papers/Downie%20et%20al.%2C%202024%20Coral%20Reefs.pdf","title":"Changes in aerobic metabolism associated with the settlement transition for the leopard coral grouper (Plectropomus leopardus)","authors":["Adam T. Downie","Caroline M. Phelps","Björn Illing","Jen Whan","Mark I. McCormick","Jodie L. Rummer"],"journal":"Coral Reefs","doi":"10.1007/s00338-024-02542-4","abstract":"AbstractMetamorphosis is a critical aspect of coral reef fish ecology. This developmental milestone marks changes in form and function that permit successful transition of pelagic larvae to the demersal lifestyle on coral reefs. However, we know very little about the physiological changes that occur during this period, specifically potential changes in energetics associated with swimming. This is critical, as swimming is the mechanism by which pelagic larvae find a suitable reef on which to settle. Coral grouper larvae (Serranidae: Plectropomas leopardus) were collected at night as they came into the vicinity of a fringing reef to settle, and their physiological metamorphosis was characterized. Larvae and 24 h-settled juveniles were exposed to an endurance swimming test at ecologically relevant swimming speeds, and oxygen uptake rates were measured during activity. To describe how aerobic and anaerobic properties of tissues change during metamorphosis, we also measured whole body citrate synthase and lactate dehydrogenase activity, respectively, as well as mitochondrial density in the trunk and pectoral fins. Our approach accurately measures the oxygen uptake rates these life stages need during the recruitment process, with larvae having a 74% higher mass-specific oxygen uptake rate (ṀO2) than settled juveniles despite swimming at speeds that are only 1.5 body-lengths per second (BLs−1) faster. Citrate synthase activity significantly decreased upon settlement; as larvae had 3.7 times higher activities than juveniles, suggesting that rapid changes in aerobic metabolism of tissues may be an important process during metamorphosis in this species. In contrast, lactate dehydrogenase did not significantly differ upon settlement. These findings highlight some physiological modifications that pelagic coral grouper larvae undertake within 24 h that contribute to successfully settling onto a coral reef.","published":"2024-10","volume":"43","issue":"5","pages":"1345-1358","scholar_pub_id":"ynWS968AAAAJ:sJsF-0ZLhtgC","scholar_citations":0},{"filename":"Nagelkerken et al. 2024 Oxford Bibliographies.pdf","name":"Nagelkerken et al. 2024 Oxford Bibliographies","year":2024,"url":"https://rummerlab.com/papers/Nagelkerken%20et%20al.%202024%20Oxford%20Bibliographies.pdf","title":"Climate Change Effects on Fishes","authors":["Ivan Nagelkerken","Bridie Allan","David Booth","Jennifer Donelson","Camille Mellin","Timothy Ravasi","Jodie L. Rummer"],"journal":"Oxford Bibliographies in Ecology","doi":"10.1093/OBO/9780199830060-0252","published":"2024-02-20"},{"filename":"Dubuc et al., 2024 MPB.pdf","name":"Dubuc et al., 2024 MPB","year":2024,"url":"https://rummerlab.com/papers/Dubuc%20et%20al.%2C%202024%20MPB.pdf","title":"Coping with environmental degradation: Physiological and morphological adjustments of wild mangrove fish to decades of aquaculture-induced nutrient enrichment","authors":["A. Dubuc","Jodie L. Rummer","L. Vigliola","H. Lemonnier"],"journal":"Marine Pollution Bulletin","doi":"10.1016/j.marpolbul.2024.116599","published":"2024-08","volume":"205","pages":"116599","scholar_pub_id":"ynWS968AAAAJ:artPoR2Yc-kC","scholar_citations":2},{"filename":"Rees et al., 2024 JEB.pdf","name":"Rees et al., 2024 JEB","year":2024,"url":"https://rummerlab.com/papers/Rees%20et%20al.%2C%202024%20JEB.pdf","title":"Estimating maximum oxygen uptake of fishes during swimming and following exhaustive chase – different results, biological bases and applications","authors":["Bernard B. Rees","Jessica E. Reemeyer","Sandra A. Binning","Samantha D. Brieske","Timothy D. Clark","Jeremy De Bonville","Rachel M. Eisenberg","Graham D. Raby","Dominique Roche","Jodie L. Rummer","Yangfan Zhang"],"journal":"Journal of Experimental Biology","doi":"10.1242/jeb.246439","abstract":"ABSTRACT\n The maximum rate at which animals take up oxygen from their environment (ṀO2,max) is a crucial aspect of their physiology and ecology. In fishes, ṀO2,max is commonly quantified by measuring oxygen uptake either during incremental swimming tests or during recovery from an exhaustive chase. In this Commentary, we compile recent studies that apply both techniques to the same fish and show that the two methods typically yield different mean estimates of ṀO2,max for a group of individuals. Furthermore, within a group of fish, estimates of ṀO2,max determined during swimming are poorly correlated with estimates determined during recovery from chasing (i.e. an individual's ṀO2,max is not repeatable across methods). One explanation for the lack of agreement is that these methods measure different physiological states, each with their own behavioural, anatomical and biochemical determinants. We propose that these methods are not directly interchangeable but, rather, each is suited to address different questions in fish biology. We suggest that researchers select the method that reflects the biological contexts of their study, and we advocate for the use of accurate terminology that acknowledges the technique used to elevate ṀO2 (e.g. peak ṀO2,swim or peak ṀO2,recovery). If the study's objective is to estimate the ‘true’ ṀO2,max of an individual or species, we recommend that pilot studies compare methods, preferably using repeated-measures designs. We hope that these recommendations contribute new insights into the causes and consequences of variation in ṀO2,max within and among fish species.","published":"2024-06-01","volume":"227","issue":"11","scholar_pub_id":"ynWS968AAAAJ:gKiMpY-AVTkC","scholar_citations":4},{"filename":"Wheeler and Rummer, 2024 JFB.pdf","name":"Wheeler and Rummer, 2024 JFB","year":2024,"url":"https://rummerlab.com/papers/Wheeler%20and%20Rummer%2C%202024%20JFB.pdf","title":"Evidence of dystocia in an oviparous shark","authors":["Carolyn R. Wheeler","Jodie L. Rummer"],"journal":"Journal of Fish Biology","doi":"10.1111/jfb.15819","abstract":"AbstractDystocia, or obstructed labor, is a well‐documented phenomenon in various captive vertebrates, including fish. However, despite the documentation of dystocia in several viviparous (live‐bearing) Chondrichthyan species (i.e., sharks, rays, skates, and chimaeras), there are no reports to date of dystocia in any oviparous (egg‐laying) species. Here we present a case of a captive female epaulette shark (Hemiscyllium ocellatum) that demonstrated symptoms of dystocia in a research‐related captive breeding programme. This communication serves as documentation that dystocia can occur in oviparous Chondrichthyans, and this information can help inform researchers and veterinary practitioners for improved care.","published":"2024-09","volume":"105","issue":"3","pages":"1004-1007","scholar_pub_id":"ynWS968AAAAJ:tH6gc1N1XXoC","scholar_citations":0},{"filename":"Higgins et al., 2024 J. Thermal Biology.pdf","name":"Higgins et al., 2024 J. Thermal Biology","year":2024,"url":"https://rummerlab.com/papers/Higgins%20et%20al.%2C%202024%20J.%20Thermal%20Biology.pdf","title":"How hot is too hot? Thermal tolerance, performance, and preference in juvenile mangrove whiprays, Urogymnus granulatus","authors":["Emily Higgins","Ian A. Bouyoucos","Adam T. Downie","Björn Illing","Ana P.B. Martins","Colin A. Simpfendorfer","Jodie L. Rummer"],"journal":"Journal of Thermal Biology","doi":"10.1016/j.jtherbio.2024.103943","published":"2024-08","volume":"124","pages":"103943","scholar_pub_id":"ynWS968AAAAJ:F1b5ZUV5XREC","scholar_citations":0},{"filename":"Rosa et al., 2024 Introduction to elasmobranch physiology.pdf","name":"Rosa et al., 2024 Introduction to elasmobranch physiology","year":2024,"url":"https://rummerlab.com/papers/Rosa%20et%20al.%2C%202024%20Introduction%20to%20elasmobranch%20physiology.pdf","title":"Introduction to elasmobranch physiology","authors":["Rui Rosa","Jodie L. Rummer","Catarina Pereira Santos"],"book":"Encyclopedia of Fish Physiology","doi":"10.1016/B978-0-323-90801-6.00186-5","published":"2024","pages":"323-335","scholar_pub_id":"ynWS968AAAAJ:lvd772isFD0C","scholar_citations":0},{"filename":"Rummer, 2024 Introduction to physiological specialisations of fish groups Cool, clever, and sometimes critical.pdf","name":"Rummer, 2024 Introduction to physiological specialisations of fish groups Cool, clever, and sometimes critical","year":2024,"url":"https://rummerlab.com/papers/Rummer%2C%202024%20Introduction%20to%20physiological%20specialisations%20of%20fish%20groups%20Cool%2C%20clever%2C%20and%20sometimes%20critical.pdf","title":"Introduction to physiological specialisations of fish groups: Cool, clever, and sometimes critical physiological","authors":["Jodie L. Rummer"],"book":"Encyclopedia of Fish Physiology","doi":"10.1016/B978-0-323-90801-6.00164-6","published":"2024","pages":"226-228"},{"filename":"Bouyoucos et al., 2024 MFR.pdf","name":"Bouyoucos et al., 2024 MFR","year":2024,"url":"https://rummerlab.com/papers/Bouyoucos%20et%20al.%2C%202024%20MFR.pdf","title":"No effects of abiotic and anthropogenic factors on reef-associated neonate shark abundance within a shark nursery-area system","authors":["I. A. Bouyoucos","C. A. Simpfendorfer","G. D. Schwieterman","K. B. Eustache","Lauric Thiault","S. Planes","Jodie L. Rummer"],"journal":"Marine and Freshwater Research","doi":"10.1071/MF24080","abstract":"Context\n Coastal habitats function as shark nursery areas; however, coastal habitats can experience extreme variation in abiotic conditions and are susceptible to human disturbances.\n \n \n Aims\n Drivers of abundance were tested within a shark nursery-area system in two populations of reef-associated neonate sharks, namely, blacktip reef sharks (Carcharhinus melanopterus) and sicklefin lemon sharks (Negaprion acutidens).\n \n \n Methods\n Catch data from a fisheries-independent gill-net survey (n = 90 sets from October 2018 to March 2019) at 10 sites around Moorea, French Polynesia, were used to test for associations between shark abundance and abiotic conditions (temperature, oxygen, pH, salinity, lunar phase and depth). Historical levels of fin-fish fishing effort, trampling (i.e. human movement through habitat), and coastal artificialisation (i.e. walls and embankments) estimated for each site were used to test for anthropogenic effects on shark abundance.\n \n \n Key results\n There were no effects of any abiotic or anthropogenic factor on abundance of either species.\n \n \n Conclusions\n Previous work corroborates our findings by demonstrating neonate sharks’ physiological tolerance to extreme abiotic conditions and high survival in response to anthropogenic stressors. Alternatively, populations are already degraded from decades of coastal development.\n \n \n Implications\n These data can aid in predicting the use of coastal habitats as shark nursery areas.","published":"2024-09-24","volume":"75","issue":"14","scholar_pub_id":"ynWS968AAAAJ:WJVC3Jt7v1AC","scholar_citations":6},{"filename":"Lonati et al., 2024 JFB.pdf","name":"Lonati et al., 2024 JFB","year":2024,"url":"https://rummerlab.com/papers/Lonati%20et%20al.%2C%202024%20JFB.pdf","title":"Novel use of deep neural networks on photographic identification of epaulette sharks (<i>Hemiscyllium ocellatum</i>) across life stages","authors":["Martina Lonati","Mohammad Jahanbakht","Danielle Atkins","Stacy L. Bierwagen","Andrew Chin","Adam Barnett","Jodie L. Rummer"],"journal":"Journal of Fish Biology","doi":"10.1111/jfb.15887","abstract":"AbstractPhotographic identification (photo ID) is an established method that is used to count animals and track individuals' movements. This method performs well with some species of elasmobranchs (i.e., sharks, skates, and rays) where individuals have distinctive skin patterns. However, the unique skin patterns used for ID must be stable through time to allow re‐identification of individuals in future sampling events. More recently, artificial intelligence (AI) models have substantially decreased the labor‐intensive process of matching photos in extensive photo ID libraries and increased the reliability of photo ID. Here, photo ID and AI are used for the first time to identify epaulette sharks (Hemiscyllium ocellatum) at different life stages for approximately 2 years. An AI model was developed to assess and compare the reliability of human‐classified ID patterns in juvenile and neonate sharks. The model also tested the persistence of unique patterns in adult sharks. Results indicate that immature life stages are unreliable for pattern identification, using both human and AI approaches, due to the plasticity of these subadult growth forms. Mature sharks maintain their patterns through time and can be identified by AI models with approximately 86% accuracy. The approach outlined in this study has the potential of validating the stability of ID patterns through time; however, testing on wild populations and long‐term datasets is needed. This study's novel deep neural network development strategy offers a streamlined and accessible framework for generating a reliable model from a small data set, without requiring high‐performance computing. Since many photo ID studies commence with limited datasets and resources, this AI model presents practical solutions to such constraints. Overall, this approach has the potential to address challenges associated with long‐term photo ID data sets and the application of AI for shark identification.","published":"2024-12","volume":"105","issue":"6","pages":"1572-1587","scholar_pub_id":"ynWS968AAAAJ:AHdEip9mkN0C","scholar_citations":0},{"filename":"Priest et al., 2024 J. Animal Ecology.pdf","name":"Priest et al., 2024 J. Animal Ecology","year":2024,"url":"https://rummerlab.com/papers/Priest%20et%20al.%2C%202024%20J.%20Animal%20Ecology.pdf","title":"Out of shape: Ocean acidification simplifies coral reef architecture and reshuffles fish assemblages","authors":["Jamie Priest","Camilo M. Ferreira","Philip L. Munday","Amelia Roberts","Riccardo Rodolfo-Metalpa","Jodie L. Rummer","Celia Schunter","Timothy Ravasi","Ivan Nagelkerken"],"journal":"Journal of Animal Ecology","doi":"10.1111/1365-2656.14127","abstract":"Abstract\n\n\nClimate change stressors are progressively simplifying biogenic habitats in the terrestrial and marine realms, and consequently altering the structure of associated species communities.\n\nHere, we used a volcanic CO₂ seep in Papua New Guinea to test in situ if altered reef architecture due to ocean acidification reshuffles associated fish assemblages.\n\nWe observed replacement of branching corals by massive corals at the seep, with simplified coral architectural complexity driving abundance declines between 60% and 86% for an assemblage of damselfishes associated with branching corals. An experimental test of habitat preference for a focal species indicated that acidification does not directly affect habitat selection behaviour, with changes in habitat structural complexity consequently appearing to be the stronger driver of assemblage reshuffling. Habitat health affected anti‐predator behaviour, with P. moluccensis becoming less bold on dead branching corals relative to live branching corals, irrespective of ocean acidification.\n\nWe conclude that coral reef fish assemblages are likely to be more sensitive to changes in habitat structure induced by increasing PCO₂ than any direct effects on behaviour, indicating that changes in coral architecture and live cover may act as important mediators of reef fish community structures in a future ocean.","published":"2024-08","volume":"93","issue":"8","pages":"1097-1107","scholar_pub_id":"ynWS968AAAAJ:Bg7qf7VwUHIC","scholar_citations":2},{"filename":"Eustache et al., 2024 J Fish Biol.pdf","name":"Eustache et al., 2024 J Fish Biol","year":2024,"url":"https://rummerlab.com/papers/Eustache%20et%20al.%2C%202024%20J%20Fish%20Biol.pdf","title":"Spatial and temporal analysis of juvenile blacktip reef shark (<i>Carcharhinus melanopterus</i>) demographies identifies critical habitats","authors":["Kim B. Eustache","Emiel van Loon","Jodie L. Rummer","Serge Planes","Isabel Smallegange"],"journal":"Journal of Fish Biology","doi":"10.1111/jfb.15569","abstract":"AbstractReef shark species have undergone sharp declines in recent decades, as they inhabit coastal areas, making them an easy target in fisheries (i.e., sharks are exploited globally for their fins, meat, and liver oil) and exposing them to other threats (e.g., being part of by‐catch, pollution, and climate change). Reef sharks play a critical role in coral reef ecosystems, where they control populations of smaller predators and herbivorous fishes either directly via predation or indirectly via behavior, thus protecting biodiversity and preventing potential overgrazing of corals. The urgent need to conserve reef shark populations necessitates a multifaceted approach to policy at local, federal, and global levels. However, monitoring programmes to evaluate the efficiency of such policies are lacking due to the difficulty in repeatedly sampling free‐ranging, wild shark populations. Over nine consecutive years, we monitored juveniles of the blacktip reef shark (Carcharhinus melanopterus) population around Moorea, French Polynesia, and within the largest shark sanctuary globally, to date. We investigated the roles of spatial (i.e., sampling sites) and temporal variables (i.e., sampling year, season, and month), water temperature, and interspecific competition on shark density across 10 coastal nursery areas. Juvenile C. melanopterus density was found to be stable over 9 years, which may highlight the effectiveness of local and likely federal policies. Two of the 10 nursery areas exhibited higher juvenile shark densities over time, which may have been related to changes in female reproductive behavior or changes in habitat type and resources. Water temperatures did not affect juvenile shark density over time as extreme temperatures proven lethal (i.e., 33°C) in juvenile C. melanopterus might have been tempered by daily variation. The proven efficiency of time‐series datasets for reef sharks to identify critical habitats (having the highest juvenile shark densities over time) should be extended to other populations to significantly contribute to the conservation of reef shark species.","published":"2024-01","volume":"104","issue":"1","pages":"92-103","scholar_pub_id":"ynWS968AAAAJ:8xutWZnSdmoC","scholar_citations":6},{"filename":"Chin et al., 2024 Ch. 21 The Biophysics of Sharks and Rays on the Great Barrier Reef.pdf","name":"Chin et al., 2024 Ch. 21 The Biophysics of Sharks and Rays on the Great Barrier Reef","year":2024,"url":"https://rummerlab.com/papers/Chin%20et%20al.%2C%202024%20Ch.%2021%20The%20Biophysics%20of%20Sharks%20and%20Rays%20on%20the%20Great%20Barrier%20Reef.pdf","title":"The Biophysics of Sharks and Rays on the Great Barrier Reef","authors":["Andrew Chin","Stacy Bierwagen","Jodie L. Rummer","Vinay Udyawer"],"book":"Oceanographic Processes of Coral Reefs","doi":"10.1201/9781003320425-24","published":"2024-01-31","pages":"306-319","scholar_pub_id":"ynWS968AAAAJ:nVrZBo8bIpAC","scholar_citations":1},{"filename":"Debaere et al., 2024 Coral Reefs.pdf","name":"Debaere et al., 2024 Coral Reefs","year":2024,"url":"https://rummerlab.com/papers/Debaere%20et%20al.%2C%202024%20Coral%20Reefs.pdf","title":"The lunar cycle does not influence catch rates or foraging success of neonatal reef sharks in an amphidromic nursery system","authors":["Shamil F. Debaere","Ornella C. Weideli","Ian A. Bouyoucos","Serge Planes","Gudrun De Boeck","Jodie L. Rummer"],"journal":"Coral Reefs","doi":"10.1007/s00338-024-02534-4","published":"2024-10","volume":"43","issue":"5","pages":"1249-1258","scholar_pub_id":"ynWS968AAAAJ:LgRImbQfgY4C","scholar_citations":0},{"filename":"Cerutti-Pereyra et al., 2024 GCB.pdf","name":"Cerutti-Pereyra et al., 2024 GCB","year":2024,"url":"https://rummerlab.com/papers/Cerutti-Pereyra%20et%20al.%2C%202024%20GCB.pdf","title":"Vulnerability of Eastern Tropical Pacific chondrichthyan fish to climate change","authors":["Florencia Cerutti-Pereyra","Elizabeth J. Drenkard","Mario Espinoza","Brittany Finucci","Felipe Galván-Magaña","Ana Hacohen-Domené","Alexander Hearn","Mauricio E. Hoyos-Padilla","James T. Ketchum","Paola A. Mejía-Falla","Ana V. Moya-Serrano","Andres F. Navia","Diana A. Pazmiño","Deni Ramírez-Macías","Jodie L. Rummer","Pelayo Salinas-de-León","Oscar Sosa-Nishizaki","Charles Stock","Andrew Chin"],"journal":"Global Change Biology","doi":"10.1111/gcb.17373","abstract":"AbstractClimate change is an environmental emergency threatening species and ecosystems globally. Oceans have absorbed about 90% of anthropogenic heat and 20%–30% of the carbon emissions, resulting in ocean warming, acidification, deoxygenation, changes in ocean stratification and nutrient availability, and more severe extreme events. Given predictions of further changes, there is a critical need to understand how marine species will be affected. Here, we used an integrated risk assessment framework to evaluate the vulnerability of 132 chondrichthyans in the Eastern Tropical Pacific (ETP) to the impacts of climate change. Taking a precautionary view, we found that almost a quarter (23%) of the ETP chondrichthyan species evaluated were highly vulnerable to climate change, and much of the rest (76%) were moderately vulnerable. Most of the highly vulnerable species are batoids (77%), and a large proportion (90%) are coastal or pelagic species that use coastal habitats as nurseries. Six species of batoids were highly vulnerable in all three components of the assessment (exposure, sensitivity and adaptive capacity). This assessment indicates that coastal species, particularly those relying on inshore nursery areas are the most vulnerable to climate change. Ocean warming, in combination with acidification and potential deoxygenation, will likely have widespread effects on ETP chondrichthyan species, but coastal species may also contend with changes in freshwater inputs, salinity, and sea level rise. This climate‐related vulnerability is compounded by other anthropogenic factors, such as overfishing and habitat degradation already occurring in the region. Mitigating the impacts of climate change on ETP chondrichthyans involves a range of approaches that include addressing habitat degradation, sustainability of exploitation, and species‐specific actions may be required for species at higher risk. The assessment also highlighted the need to further understand climate change's impacts on key ETP habitats and processes and identified knowledge gaps on ETP chondrichthyan species.","published":"2024-07","volume":"30","issue":"7","scholar_pub_id":"ynWS968AAAAJ:Ak0FvsSvgGUC","scholar_citations":2},{"filename":"Thomas et al., 2023 Marine Biology.pdf","name":"Thomas et al., 2023 Marine Biology","year":2023,"url":"https://rummerlab.com/papers/Thomas%20et%20al.%2C%202023%20Marine%20Biology.pdf","title":"Effects of projected end-of-century temperature on the muscle development of neonate epaulette sharks, <i>Hemiscyllium ocellatum</i>","authors":["Peyton A. Thomas","Emily E. Peele","Carolyn R. Wheeler","Kara Yopak","Jodie L. Rummer","John W. Mandelman","Stephen T. Kinsey"],"journal":"Marine Biology","doi":"10.1007/s00227-023-04218-z","published":"2023-06","volume":"170","issue":"6","scholar_pub_id":"ynWS968AAAAJ:QYdC8u9Cj1oC","scholar_citations":2},{"filename":"Eustache et al., 2023 Sci Rep.pdf","name":"Eustache et al., 2023 Sci Rep","year":2023,"url":"https://rummerlab.com/papers/Eustache%20et%20al.%2C%202023%20Sci%20Rep.pdf","title":"Genetic evidence for plastic reproductive philopatry and matrotrophy in blacktip reef sharks (<i>Carcharhinus melanopterus</i>) of the Moorea Island (French Polynesia)","authors":["Kim B. Eustache","Émilie Boissin","Céline Tardy","Ian A. Bouyoucos","Jodie L. Rummer","Serge Planes"],"journal":"Scientific Reports","doi":"10.1038/s41598-023-40140-6","abstract":"AbstractThe exploitation of sharks and the degradation of their habitats elevate the urgency to understand the factors that influence offspring survival and ultimately shark reproductive success. We monitored and sampled blacktip reef sharks (Carcharhinus melanopterus) in nursery habitats of Moorea Island (French Polynesia), to improve knowledge on shark reproductive behavior and biology. We sampled fin clips and morphometrics from 230 young-of-the-year sharks and used microsatellite DNA markers to process parentage analysis to study the reproductive philopatric behavior in female sharks and the matrotrophy within litters. These traits are driving the success of the local replenishment influencing selection through birth site and maternal reserves transmitted to pups. Parentage analysis revealed that some female sharks changed their parturition areas (inter-seasonally) while other female sharks came back to the same site for parturition, providing evidence for a plastic philopatric behavior. Morphometrics showed that there was no significant relationship between body condition indices and nursery locations. However, similarities and differences in body condition were observed between individuals sharing the same mother, indicating that resource allocation within some shark litters might be unbalanced. Our findings further our understanding of the reproductive biology and behavior that shape shark populations with the aim to introduce these parameters into future conservation strategies.","published":"2023-09-09","volume":"13","issue":"1","scholar_pub_id":"ynWS968AAAAJ:nZcligLrVowC","scholar_citations":2},{"filename":"Seebacher et al., 2023 CP.pdf","name":"Seebacher et al., 2023 CP","year":2023,"url":"https://rummerlab.com/papers/Seebacher%20et%20al.%2C%202023%20CP.pdf","title":"How can physiology best contribute to wildlife conservation in a warming world?","authors":["Frank Seebacher","Edward Narayan","Jodie L. Rummer","Sean Tomlinson","Steven J. Cooke"],"journal":"Conservation Physiology","doi":"10.1093/conphys/coad038","abstract":"Abstract\n Global warming is now predicted to exceed 1.5°C by 2033 and 2°C by the end of the 21st century. This level of warming and the associated environmental variability are already increasing pressure on natural and human systems. Here we emphasize the role of physiology in the light of the latest assessment of climate warming by the Intergovernmental Panel on Climate Change. We describe how physiology can contribute to contemporary conservation programmes. We focus on thermal responses of animals, but we acknowledge that the impacts of climate change are much broader phylogenetically and environmentally. A physiological contribution would encompass environmental monitoring, coupled with measuring individual sensitivities to temperature change and upscaling these to ecosystem level. The latest version of the widely accepted Conservation Standards designed by the Conservation Measures Partnership includes several explicit climate change considerations. We argue that physiology has a unique role to play in addressing these considerations. Moreover, physiology can be incorporated by institutions and organizations that range from international bodies to national governments and to local communities, and in doing so, it brings a mechanistic approach to conservation and the management of biological resources.","published":"2023-01-01","volume":"11","issue":"1","scholar_pub_id":"ynWS968AAAAJ:yqoGN6RLRZoC","scholar_citations":14},{"filename":"Wheeler et al., 2022 JFB.pdf","name":"Wheeler et al., 2022 JFB","year":2023,"url":"https://rummerlab.com/papers/Wheeler%20et%20al.%2C%202022%20JFB.pdf","title":"Nonlethally assessing elasmobranch ontogenetic shifts in energetics","authors":["Carolyn R. Wheeler","Duncan J. Irschick","John W. Mandelman","Jodie L. Rummer"],"journal":"Journal of Fish Biology","doi":"10.1111/jfb.15425","abstract":"AbstractBody condition is an important proxy for the overall health and energetic status of fishes. The classically used Fulton's condition factor requires length and mass measurements, but mass can be difficult to obtain in large species. Girth measurements can replace mass for wild pelagic sharks. However, girth‐calculated condition has not been validated against Fulton's condition factor intraspecifically, across ontogeny or reproduction, or in a controlled setting. We used the epaulette shark (Hemiscyllium ocellatum), because they are amenable to captive reproduction, to track fine‐scale body condition changes across life stages, oviparous reproduction and between condition indices. We measured four girths, total length and mass of 16 captive epaulette sharks across 1 year and tracked female reproduction daily. We also collected length and mass data from an additional 72 wild‐caught sharks and 155 sharks from five previous studies and two public aquaria to examine the relationship between length and mass for this species. Even though data were derived from a variety of sources, a predictable length–mass relationship (R2 = 0.990) was achievable, indicating that combining data from a variety of sources could help overcome knowledge gaps regarding basic life history characteristics. We also found that condition factor decreased during early life stages, then increased again into adulthood, with predictable changes across the female reproductive cycle. Finally, we determined that both Fulton's and girth condition analyses were comparable. Outcomes from this study uniquely provide body condition changes across the complete life history, including fine‐scale female reproductive stages, and validate the use of girths as a nonlethal whole‐organism energetic assessment for fishes.","published":"2023-08","volume":"103","issue":"2","pages":"235-246","scholar_pub_id":"ynWS968AAAAJ:LhH-TYMQEocC","scholar_citations":1},{"filename":"Debaere et al., 2023 Conservation Physiology.pdf","name":"Debaere et al., 2023 Conservation Physiology","year":2023,"url":"https://rummerlab.com/papers/Debaere%20et%20al.%2C%202023%20Conservation%20Physiology.pdf","title":"Quantifying changes in umbilicus size to estimate the relative age of neonatal blacktip reef sharks (<i>Carcharhinus melanopterus</i>)","authors":["Shamil F. Debaere","Ornella C. Weideli","Ian A. Bouyoucos","Kim B. Eustache","José E. Trujillo","Gudrun De Boeck","Serge Planes","Jodie L. Rummer"],"journal":"Conservation Physiology","doi":"10.1093/conphys/coad028","abstract":"ABSTRACT\n Sharks can incur a range of external injuries throughout their lives that originate from various sources, but some of the most notable wounds in viviparous shark neonates are at the umbilicus. Umbilical wounds typically heal within 1 to 2 months post-parturition, depending on the species, and are therefore often used as an indicator of neonatal life stage or as a relative measure of age [e.g. grouping by umbilical wound classes (UWCs), according to the size of their umbilicus]. To improve comparisons of early-life characteristics between studies, species and across populations, studies using UWCs should integrate quantitative changes. To overcome this issue, we set out to quantify changes in umbilicus size of neonatal blacktip reef sharks (Carcharhinus melanopterus) around the island of Moorea, French Polynesia, based on temporal regression relationships of umbilicus size. Here, we provide a detailed description for the construction of similar quantitative umbilical wound classifications, and we subsequently validate the accuracy of our classification and discuss two examples to illustrate its efficacy, depletion rate of maternally provided energy reserves and estimation of parturition period. A significant decrease in body condition in neonatal sharks as early as twelve days post-parturition suggests a rapid depletion of in utero-allocated energy reserves stored in the liver. Back calculations of timing of birth based on the umbilicus size of neonates determine a parturition season from September to January, with most parturitions occurring during October and November. As such, this study contributes valuable data to inform the conservation and management of young-of-the-year blacktip reef sharks, and we therefore encourage the construction and use of similar regression relationships for other viviparous shark species.","published":"2023-01-01","volume":"11","issue":"1","scholar_pub_id":"ynWS968AAAAJ:HeT0ZceujKMC","scholar_citations":9},{"filename":"Downie et al., 2023 PLoS Biology.pdf","name":"Downie et al., 2023 PLoS Biology","year":2023,"url":"https://rummerlab.com/papers/Downie%20et%20al.%2C%202023%20PLoS%20Biology.pdf","title":"Rapid physiological and transcriptomic changes associated with oxygen delivery in larval anemonefish suggest a role in adaptation to life on hypoxic coral reefs","authors":["Adam T. Downie","Sjannie Lefevre","Björn Illing","Jessica Harris","Michael D. Jarrold","Mark I. McCormick","Göran E. Nilsson","Jodie L. Rummer"],"journal":"PLOS Biology","doi":"10.1371/journal.pbio.3002102","abstract":"Connectivity of coral reef fish populations relies on successful dispersal of a pelagic larval phase. Pelagic larvae must exhibit high swimming abilities to overcome ocean and reef currents, but once settling onto the reef, larvae transition to endure habitats that become hypoxic at night. Therefore, coral reef fish larvae must rapidly and dramatically shift their physiology over a short period of time. Taking an integrative, physiological approach, using swimming respirometry, and examining hypoxia tolerance and transcriptomics, we show that larvae of cinnamon anemonefish (Amphiprion melanopus) rapidly transition between “physiological extremes” at the end of their larval phase. Daily measurements of swimming larval anemonefish over their entire early development show that they initially have very high mass-specific oxygen uptake rates. However, oxygen uptake rates decrease midway through the larval phase. This occurs in conjunction with a switch in haemoglobin gene expression and increased expression of myoglobin, cytoglobin, and neuroglobin, which may all contribute to the observed increase in hypoxia tolerance. Our findings indicate that critical ontogenetic changes in the gene expression of oxygen-binding proteins may underpin the physiological mechanisms needed for successful larval recruitment to reefs.","published":"2023-05-11","volume":"21","issue":"5","pages":"e3002102","scholar_pub_id":"ynWS968AAAAJ:r_AWSJRzSzQC","scholar_citations":11},{"filename":"Cummings et al., 2023.pdf","name":"Cummings et al., 2023","year":2023,"url":"https://rummerlab.com/papers/Cummings%20et%20al.%2C%202023.pdf","title":"Research priorities for the sustainability of coral-rich western Pacific seascapes","authors":["Graeme S. Cumming","Maja Adamska","Michele L. Barnes","Jon Barnett","David R. Bellwood","Joshua E. Cinner","Philippa J. Cohen","Jennifer M. Donelson","Katharina Fabricius","R. Quentin Grafton","Alana Grech","Georgina G. Gurney","Ove Hoegh-Guldberg","Andrew S. Hoey","Mia O. Hoogenboom","Jacqueline Lau","Catherine E. Lovelock","Ryan Lowe","David J. Miller","Tiffany H. Morrison","Peter J. Mumby","Martin Nakata","John M. Pandolfi","Garry D. Peterson","Morgan S. Pratchett","Timothy Ravasi","Cynthia Riginos","Jodie L. Rummer","Britta Schaffelke","Thomas Wernberg","Shaun K. Wilson"],"journal":"Regional Environmental Change","doi":"10.1007/s10113-023-02051-0","abstract":"AbstractNearly a billion people depend on tropical seascapes. The need to ensure sustainable use of these vital areas is recognised, as one of 17 policy commitments made by world leaders, in Sustainable Development Goal (SDG) 14 (‘Life below Water’) of the United Nations. SDG 14 seeks to secure marine sustainability by 2030. In a time of increasing social-ecological unpredictability and risk, scientists and policymakers working towards SDG 14 in the Asia–Pacific region need to know: (1) How are seascapes changing? (2) What can global society do about these changes? and (3) How can science and society together achieve sustainable seascape futures? Through a horizon scan, we identified nine emerging research priorities that clarify potential research contributions to marine sustainability in locations with high coral reef abundance. They include research on seascape geological and biological evolution and adaptation; elucidating drivers and mechanisms of change; understanding how seascape functions and services are produced, and how people depend on them; costs, benefits, and trade-offs to people in changing seascapes; improving seascape technologies and practices; learning to govern and manage seascapes for all; sustainable use, justice, and human well-being; bridging communities and epistemologies for innovative, equitable, and scale-crossing solutions; and informing resilient seascape futures through modelling and synthesis. Researchers can contribute to the sustainability of tropical seascapes by co-developing transdisciplinary understandings of people and ecosystems, emphasising the importance of equity and justice, and improving knowledge of key cross-scale and cross-level processes, feedbacks, and thresholds.","published":"2023-06","volume":"23","issue":"2","scholar_pub_id":"ynWS968AAAAJ:fFSKOagxvKUC","scholar_citations":13},{"filename":"Hasenei et al., 2023 Frontiers in Marine Science.pdf","name":"Hasenei et al., 2023 Frontiers in Marine Science","year":2023,"url":"https://rummerlab.com/papers/Hasenei%20et%20al.%2C%202023%20Frontiers%20in%20Marine%20Science.pdf","title":"Sharks and their relatives: can their past help predict their future?","authors":["Aaron Hasenei","Jennifer M. Donelson","Timothy Ravasi","Jodie L. Rummer"],"journal":"Frontiers in Marine Science","doi":"10.3389/fmars.2023.1268532","abstract":"Elasmobranchs (i.e., sharks, skates, and rays) have survived five mass extinction events and changed relatively little throughout their ~450-million-year evolutionary history. Therefore, elasmobranchs may provide critical evolutionary perspectives on how species and populations can elicit phenotypic plasticity and adaptation responses to climate change. Unfortunately, despite their roles as critical apex- and meso-predators, most elasmobranch species are considered to be highly vulnerable to the impacts of fisheries exploitation and climate change, which is compounded by their K-selected life history strategies. Furthermore, the future of elasmobranchs is uncertain at best in the face of anthropogenic climate change because there have only been a handful of studies that have directly investigated the effects of climate change related stressors. Phenotypic plasticity in response to climate change, specifically ocean warming, may be a species’ best chance of resilience given the expedited rate of environmental change. However, despite extensive research on plasticity within and across generations in teleost fishes, there remains a knowledge gap for elasmobranch species, owing to their extended life spans and delayed sexual maturity. Here, we present four case studies on different elasmobranch species to lend perspectives on the capacity for phenotypic plasticity within the context of ocean warming. Furthermore, we discuss potential research avenues and modern technologies that may enable future investigations to empirically explore the capacity for phenotypic plasticity in elasmobranchs.","published":"2023-11-01","volume":"10","scholar_pub_id":"ynWS968AAAAJ:_OXeSy2IsFwC","scholar_citations":1},{"filename":"Nagelkerken et al., 2023 PLoS Climate.pdf","name":"Nagelkerken et al., 2023 PLoS Climate","year":2023,"url":"https://rummerlab.com/papers/Nagelkerken%20et%20al.%2C%202023%20PLoS%20Climate.pdf","title":"The effects of climate change on the ecology of fishes","authors":["Ivan Nagelkerken","Bridie J. M. Allan","David J. Booth","Jennifer M. Donelson","Graham J. Edgar","Timothy Ravasi","Jodie L. Rummer","Adriana Vergés","Camille Mellin"],"journal":"PLOS Climate","doi":"10.1371/journal.pclm.0000258","abstract":"Ocean warming and acidification are set to reshuffle life on Earth and alter ecological processes that underpin the biodiversity, health, productivity, and resilience of ecosystems. Fishes contribute significantly to marine, estuarine, and freshwater species diversity and the functioning of marine ecosystems, and are not immune to climate change impacts. Whilst considerable effort has been placed on studying the effects of climate change on fishes, much emphasis has been placed on their (eco)physiology and at the organismal level. Fishes are affected by climate change through impacts at various levels of biological organisation and through a large variety of traits, making it difficult to make generalisations regarding fish responses to climate change. Here, we briefly review the current state of knowledge of climate change effects on fishes across a wide range of subfields of fish ecology and evaluate these effects at various scales of biological organisation (from genes to ecosystems). We argue that a more holistic synthesis of the various interconnected subfields of fish ecology and integration of responses at different levels of biological organisation are needed for a better understanding of how fishes and their populations and communities might respond or adapt to the multi-stressor effects of climate change. We postulate that studies using natural analogues of climate change, meta-analyses, advanced integrative modelling approaches, and lessons learned from past extreme climate events could help reveal some general patterns of climate change impacts on fishes that are valuable for management and conservation approaches. Whilst these might not reveal many of the underlying mechanisms responsible for observed biodiversity and community change, their insights are useful to help create better climate adaptation strategies for their preservation in a rapidly changing ocean.","published":"2023-08-07","volume":"2","issue":"8","pages":"e0000258","scholar_pub_id":"ynWS968AAAAJ:P7Ujq4OLJYoC","scholar_citations":29},{"filename":"Ferreira et al., 2021 Biology Letters.pdf","name":"Ferreira et al., 2021 Biology Letters","year":2022,"url":"https://rummerlab.com/papers/Ferreira%20et%20al.%2C%202021%20Biology%20Letters.pdf","title":"A multi-tasking stomach: functional coexistence of acid–peptic digestion and defensive body inflation in three distantly related vertebrate lineages","authors":["P. Ferreira","G. T. Kwan","S. Haldorson","Jodie L. Rummer","F. Tashiro","L. F. C. Castro","M. Tresguerres","J. M. Wilson"],"journal":"Biology Letters","doi":"10.1098/rsbl.2021.0583","abstract":"Puffer and porcupine fishes (families Diodontidae and Tetraodontidae, order Tetradontiformes) are known for their extraordinary ability to triple their body size by swallowing and retaining large amounts of seawater in their accommodating stomachs. This inflation mechanism provides a defence to predation; however, it is associated with the secondary loss of the stomach's digestive function. Ingestion of alkaline seawater during inflation would make acidification inefficient (a potential driver for the loss of gastric digestion), paralleled by the loss of acid–peptic genes. We tested the hypothesis of stomach inflation as a driver for the convergent evolution of stomach loss by investigating the gastric phenotype and genotype of four distantly related stomach inflating gnathostomes: sargassum fish, swellshark, bearded goby and the pygmy leatherjacket. Strikingly, unlike in the puffer/porcupine fishes, we found no evidence for the loss of stomach function in sargassum fish, swellshark and bearded goby. Only the pygmy leatherjacket (Monochanthidae, Tetraodontiformes) lacked the gastric phenotype and genotype. In conclusion, ingestion of seawater for inflation, associated with loss of gastric acid secretion, is restricted to the Tetraodontiformes and is not a selective pressure for gastric loss in other reported gastric inflating fishes.","published":"2022-02","volume":"18","issue":"2","scholar_pub_id":"ynWS968AAAAJ:_FM0Bhl9EiAC","scholar_citations":5},{"filename":"Porter et al., 2022 ICB.pdf","name":"Porter et al., 2022 ICB","year":2022,"url":"https://rummerlab.com/papers/Porter%20et%20al.%2C%202022%20ICB.pdf","title":"Aquatic Walking and Swimming Kinematics of Neonate and Juvenile Epaulette Sharks","authors":["Marianne E. Porter","Andrea V. Hernandez","Connor R. Gervais","Jodie L. Rummer"],"journal":"Integrative And Comparative Biology","doi":"10.1093/icb/icac127","abstract":"AbstractThe epaulette shark, Hemiscyllium ocellatum, is a small, reef-dwelling, benthic shark that—using its paired fins—can walk, both in and out of water. Within the reef flats, this species experiences short periods of elevated CO₂ and hypoxia as well as fluctuating temperatures as reef flats become isolated with the outgoing tide. Past studies have shown that this species is robust (i.e., respiratory and metabolic performance, behavior) to climate change-relevant elevated CO₂ levels as well as hypoxia and anoxia tolerant. However, epaulette shark embryos reared under ocean warming conditions hatch earlier and smaller, with altered patterns and coloration, and with higher metabolic costs than their current-day counterparts. Findings to date suggest that this species has adaptations to tolerate some, but perhaps not all, of the challenging conditions predicted for the 21st century. As such, the epaulette shark is emerging as a model system to understand vertebrate physiology in changing oceans. Yet, few studies have investigated the kinematics of walking and swimming, which may be vital to their biological fitness, considering their habitat and propensity for challenging environmental conditions. Given that neonates retain embryonic nutrition via an internalized yolk sac, resulting in a bulbous abdomen, while juveniles actively forage for worms, crustaceans, and small fishes, we hypothesized that difference in body shape over early ontogeny would affect locomotor performance. To test this, we examined neonate and juvenile locomotor kinematics during the three aquatic gaits they utilize—slow-to-medium walking, fast walking, and swimming—using 13 anatomical landmarks along the fins, girdles, and body midline. We found that differences in body shape did not alter kinematics between neonates and juveniles. Overall velocity, fin rotation, axial bending, and tail beat frequency and amplitude were consistent between early life stages. Data suggest that the locomotor kinematics are maintained between neonate and juvenile epaulette sharks, even as their feeding strategy changes. Studying epaulette shark locomotion allows us to understand this—and perhaps related—species’ ability to move within and away from challenging conditions in their habitats. Such locomotor traits may not only be key to survival, in general, as a small, benthic mesopredator (i.e., movements required to maneuver into small reef crevices to avoid aerial and aquatic predators), but also be related to their sustained physiological performance under challenging environmental conditions, including those associated with climate change—a topic worthy of future investigation.","published":"2022-12-30","volume":"62","issue":"6","pages":"1710-1724","scholar_pub_id":"ynWS968AAAAJ:_5tno0g5mFcC","scholar_citations":11},{"filename":"Rummer et al., 2022 Ch. 25 in Biology of Sharks and their Relatives.pdf","name":"Rummer et al., 2022 Ch. 25 in Biology of Sharks and their Relatives","year":2022,"url":"https://rummerlab.com/papers/Rummer%20et%20al.%2C%202022%20Ch.%2025%20in%20Biology%20of%20Sharks%20and%20their%20Relatives.pdf","title":"Climate Change and Sharks","authors":["Jodie L. Rummer","Ian A. Bouyoucos","Carolyn R. Wheeler","Catarina Pereira Santos","Rui Rosa"],"book":"Biology of Sharks and their Relatives, Third Edition","doi":"10.1201/9781003262190-25","pages":"767-786","scholar_pub_id":"ynWS968AAAAJ:umqufdRvDiIC","scholar_citations":14},{"filename":"Rummer and Illing 2022 Fish Physiology Vol. 39B.pdf","name":"Rummer and Illing 2022 Fish Physiology Vol. 39B","year":2022,"url":"https://rummerlab.com/papers/Rummer%20and%20Illing%202022%20Fish%20Physiology%20Vol.%2039B.pdf","title":"Coral reef fishes in a multi-stressor world","authors":["Jodie L. Rummer","Björn Illing"],"book":"Fish Physiology","doi":"10.1016/bs.fp.2022.04.011","published":"2022","pages":"325-391","scholar_pub_id":"ynWS968AAAAJ:IUKN3-7HHlwC","scholar_citations":4},{"filename":"Wheeler et al., 2022 J. Biol. Rhythms.pdf","name":"Wheeler et al., 2022 J. Biol. Rhythms","year":2022,"url":"https://rummerlab.com/papers/Wheeler%20et%20al.%2C%202022%20J.%20Biol.%20Rhythms.pdf","title":"Diel Rhythm and Thermal Independence of Metabolic Rate in a Benthic Shark","authors":["Carolyn R. Wheeler","Jeff Kneebone","Dennis Heinrich","Jan M. Strugnell","John W. Mandelman","Jodie L. Rummer"],"journal":"Journal of Biological Rhythms","doi":"10.1177/07487304221107843","abstract":"Biological rhythms that are mediated by exogenous factors, such as light and temperature, drive the physiology of organisms and affect processes ranging from cellular to population levels. For elasmobranchs (i.e. sharks, rays, and skates), studies documenting diel activity and movement patterns indicate that many species are crepuscular or nocturnal in nature. However, few studies have investigated the rhythmicity of elasmobranch physiology to understand the mechanisms underpinning these distinct patterns. Here, we assess diel patterns of metabolic rates in a small meso-predator, the epaulette shark ( Hemiscyllium ocellatum), across ecologically relevant temperatures and upon acutely removing photoperiod cues. This species possibly demonstrates behavioral sleep during daytime hours, which is supported herein by low metabolic rates during the day and a 1.7-fold increase in metabolic rates at night. From spring to summer seasons, where average average water temperature temperatures for this species range 24.5 to 28.5 °C, time of day, and not temperature, had the strongest influence on metabolic rate. These results indicate that this species, and perhaps other similar species from tropical and coastal environments, may have physiological mechanisms in place to maintain metabolic rate on a seasonal time scale regardless of temperature fluctuations that are relevant to their native habitats.","published":"2022-10","volume":"37","issue":"5","pages":"484-497","scholar_pub_id":"ynWS968AAAAJ:sNmaIFBj_lkC","scholar_citations":9},{"filename":"Shu et al., 2022 CBP-A.pdf","name":"Shu et al., 2022 CBP-A","year":2022,"url":"https://rummerlab.com/papers/Shu%20et%20al.%2C%202022%20CBP-A.pdf","title":"Enhanced oxygen unloading in two marine percomorph teleosts","authors":["Jacelyn J. Shu","Rachael M. Heuer","Kelly D. Hannan","John D. Stieglitz","Daniel D. Benetti","Jodie L. Rummer","Martin Grosell","Colin J. Brauner"],"journal":"Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology","doi":"10.1016/j.cbpa.2021.111101","published":"2022-02","volume":"264","pages":"111101","scholar_pub_id":"ynWS968AAAAJ:86PQX7AUzd4C","scholar_citations":5},{"filename":"Trujillo et al., 2022 JEB.pdf","name":"Trujillo et al., 2022 JEB","year":2022,"url":"https://rummerlab.com/papers/Trujillo%20et%20al.%2C%202022%20JEB.pdf","title":"Escape response kinematics in two species of tropical shark: short escape latencies and high turning performance","authors":["José E. Trujillo","Ian Bouyoucos","William J. Rayment","Paolo Domenici","Serge Planes","Jodie L. Rummer","Bridie J. M. Allan"],"journal":"Journal of Experimental Biology","doi":"10.1242/jeb.243973","abstract":"ABSTRACT\n Accelerative manoeuvres, such as fast-starts, are crucial for fish to avoid predation. Escape responses are fast-starts that include fundamental survival traits for prey that experience high predation pressure. However, no previous study has assessed escape performance in neonate tropical sharks. We quantitatively evaluated vulnerability traits of neonate tropical sharks by testing predictions on their fast-start escape performance. We predicted (1) high manoeuvrability, given their high flexibility, but (2) low propulsive locomotion owing to the drag costs associated with pectoral fin extension during escape responses. Further, based on previous work on dogfish, Squalus suckleyi, we predicted (3) long reaction times (as latencies longer than teleosts, &gt;20 ms). We used two-dimensional, high-speed videography analysis of mechano-acoustically stimulated neonate blacktip reef shark, Carcharhinus melanopterus (n=12), and sicklefin lemon shark, Negaprion acutidens (n=8). Both species performed a characteristic C-start double-bend response (i.e. two body bends), but single-bend responses were only observed in N. acutidens. As predicted, neonate sharks showed high manoeuvrability with high turning rates and tight turning radii (3–11% of body length) but low propulsive performance (i.e. speed, acceleration and velocity) when compared with similar-sized teleosts and S. suckleyi. Contrary to expectations, escape latencies were &lt;20 ms in both species, suggesting that the neurophysiological system of sharks when reacting to a predatory attack may not be limited to long response times. These results provide a quantitative assessment of survival traits in neonate tropical sharks that will be crucial for future studies that consider the vulnerability of these sharks to predation.","published":"2022-11-15","volume":"225","issue":"22","scholar_pub_id":"ynWS968AAAAJ:mlAyqtXpCwEC","scholar_citations":8},{"filename":"Kang et al., 2022 GCB.pdf","name":"Kang et al., 2022 GCB","year":2022,"url":"https://rummerlab.com/papers/Kang%20et%20al.%2C%202022%20GCB.pdf","title":"Rapid evolution fuels transcriptional plasticity to ocean acidification","authors":["Jingliang Kang","Ivan Nagelkerken","Jodie L. Rummer","Riccardo Rodolfo-Metalpa","Philip L. Munday","Timothy Ravasi","Celia Schunter"],"journal":"Global Change Biology","doi":"10.1111/gcb.16119","abstract":"Abstract\n \n Ocean acidification (OA) is postulated to affect the physiology, behavior, and life‐history of marine species, but potential for acclimation or adaptation to elevated\n p\n CO₂\n in wild populations remains largely untested. We measured brain transcriptomes of six coral reef fish species at a natural volcanic CO₂\n  seep and an adjacent control reef in Papua New Guinea. We show that elevated\n p\n CO₂\n induced common molecular responses related to circadian rhythm and immune system but different magnitudes of molecular response across the six species. Notably, elevated transcriptional plasticity was associated with core circadian genes affecting the regulation of intracellular pH and neural activity in\n Acanthochromis polyacanthus. Gene expression patterns were reversible in this species as evidenced upon reduction of CO₂\n following a natural storm‐event. Compared with other species,\n Ac.\n polyacanthus\n has a more rapid evolutionary rate and more positively selected genes in key functions under the influence of elevated CO₂, thus fueling increased transcriptional plasticity. Our study reveals the basis to variable gene expression changes across species, with some species possessing evolved molecular toolkits to cope with future OA.","published":"2022-05","volume":"28","issue":"9","pages":"3007-3022","scholar_pub_id":"ynWS968AAAAJ:8d8msizDQcsC","scholar_citations":29},{"filename":"Wheeler et al., 2022 CP.pdf","name":"Wheeler et al., 2022 CP","year":2022,"url":"https://rummerlab.com/papers/Wheeler%20et%20al.%2C%202022%20CP.pdf","title":"The upper thermal limit of epaulette sharks (<i>Hemiscyllium ocellatum</i>) is conserved across three life history stages, sex and body size","authors":["Carolyn R. Wheeler","Bethan J. Lang","John W. Mandelman","Jodie L. Rummer"],"journal":"Conservation Physiology","doi":"10.1093/conphys/coac074","abstract":"Abstract\n Owing to climate change, most notably the increasing frequency of marine heatwaves and long-term ocean warming, better elucidating the upper thermal limits of marine fishes is important for predicting the future of species and populations. The critical thermal maximum (CTmax), or the highest temperature a species can tolerate, is a physiological metric that is used to establish upper thermal limits. Among marine organisms, this metric is commonly assessed in bony fishes but less so in other taxonomic groups, such as elasmobranchs (subclass of sharks, rays and skates), where only thermal acclimation effects on CTmax have been assessed. Herein, we tested whether three life history stages, sex and body size affected CTmax in a tropical elasmobranch, the epaulette shark (Hemiscyllium ocellatum), collected from the reef flats surrounding Heron Island, Australia. Overall, we found no difference in CTmax between life history stages, sexes or across a range of body sizes. Findings from this research suggest that the energetically costly processes (i.e. growth, maturation and reproduction) associated with the life history stages occupying these tropical reef flats do not change overall acute thermal tolerance. However, it is important to note that neither embryos developing in ovo, neonates, nor females actively encapsulating egg cases were observed in or collected from the reef flats. Overall, our findings provide the first evidence in an elasmobranch that upper thermal tolerance is not impacted by life history stage or size. This information will help to improve our understanding of how anthropogenic climate change may (or may not) disproportionally affect particular life stages and, as such, where additional conservation and management actions may be required.","published":"2022-01-01","volume":"10","issue":"1","scholar_pub_id":"ynWS968AAAAJ:dBIO0h50nwkC","scholar_citations":9},{"filename":"Bouyoucos et al., 2022 MEPS.pdf","name":"Bouyoucos et al., 2022 MEPS","year":2022,"url":"https://rummerlab.com/papers/Bouyoucos%20et%20al.%2C%202022%20MEPS.pdf","title":"Thermally insensitive physiological performance allows neonatal sharks to use coastal habitats as nursery areas","authors":["IA Bouyoucos","CA Simpfendorfer","S Planes","GD Schwieterman","OC Weideli","Jodie L. Rummer"],"journal":"Marine Ecology Progress Series","doi":"10.3354/meps13941","abstract":"Coastal sharks can use shallow, nearshore habitats as nursery areas, which is a behaviour that may increase fitness. The ecological benefits of shark nursery areas are well studied; yet the physiological mechanisms that enable sharks to exploit coastal habitats, especially those that experience extreme and dynamic temperatures, remain understudied. We hypothesised that neonatal sharks are able to use thermally dynamic coastal habitats as nursery areas because temperature does not strongly affect their physiology. To test this hypothesis, we defined patterns of nursery area use and temperature-dependent physiological performance in 2 reef shark species. First, we determined whether 10 sites around the island of Moorea, French Polynesia, satisfied nursery area criteria for neonate populations of blacktip reef sharks Carcharhinus melanopterus and sicklefin lemon sharks Negaprion acutidens using 5 consecutive years of abundance surveys. We then quantified effects of thermal exposure in situ on growth in recaptured individuals and quantified the temperature dependence of metabolic rate ex situ using respirometry. We found several potential C. melanopterus nursery areas, but during different sampling years, and identified 1 N. acutidens nursery area that remained consistent during the entire 5 yr study. In support of our hypothesis, growth and metabolic performance were not strongly affected by temperature in either species. Thus, thermally insensitive physiological performance may be a trait that elasmobranchs exhibit in thermally variable coastal habitats, including shark nursery areas. Together, this approach demonstrates how physiological and ecological concepts complement each other to improve our understanding of nursery area use in coastal shark populations.","published":"2022-01-20","volume":"682","pages":"137-152","scholar_pub_id":"ynWS968AAAAJ:9pM33mqn1YgC","scholar_citations":22},{"filename":"Grégoire et al., 2021 Frontiers Marine Science.pdf","name":"Grégoire et al., 2021 Frontiers Marine Science","year":2021,"url":"https://rummerlab.com/papers/Gr%C3%A9goire%20et%20al.%2C%202021%20Frontiers%20Marine%20Science.pdf","title":"A Global Ocean Oxygen Database and Atlas for Assessing and Predicting Deoxygenation and Ocean Health in the Open and Coastal Ocean","authors":["Marilaure Grégoire","Véronique Garçon","Hernan Garcia","Denise Breitburg","Kirsten Isensee","Andreas Oschlies","Maciej Telszewski","Alexander Barth","Henry C. Bittig","Jacob Carstensen","Thierry Carval","Fei Chai","Francisco Chavez","Daniel Conley","Laurent Coppola","Sean Crowe","Kim Currie","Minhan Dai","Bruno Deflandre","Boris Dewitte","Robert Diaz","Emilio Garcia-Robledo","Denis Gilbert","Alessandra Giorgetti","Ronnie Glud","Dimitri Gutierrez","Shigeki Hosoda","Masao Ishii","Gil Jacinto","Chris Langdon","Siv K. Lauvset","Lisa A. Levin","Karin E. Limburg","Hela Mehrtens","Ivonne Montes","Wajih Naqvi","Aurélien Paulmier","Benjamin Pfeil","Grant Pitcher","Sylvie Pouliquen","Nancy Rabalais","Christophe Rabouille","Virginie Recape","Michaël Roman","Kenneth Rose","Daniel Rudnick","Jodie L. Rummer","Catherine Schmechtig","Sunke Schmidtko","Brad Seibel","Caroline Slomp","U. Rashid Sumalia","Toste Tanhua","Virginie Thierry","Hiroshi Uchida","Rik Wanninkhof","Moriaki Yasuhara"],"journal":"Frontiers in Marine Science","doi":"10.3389/fmars.2021.724913","abstract":"In this paper, we outline the need for a coordinated international effort toward the building of an open-access Global Ocean Oxygen Database and ATlas (GO\n 2\n DAT) complying with the FAIR principles (Findable, Accessible, Interoperable, and Reusable). GO\n 2\n DAT will combine data from the coastal and open ocean, as measured by the chemical Winkler titration method or by sensors (e.g., optodes, electrodes) from Eulerian and Lagrangian platforms (e.g., ships, moorings, profiling floats, gliders, ships of opportunities, marine mammals, cabled observatories). GO\n 2\n DAT will further adopt a community-agreed, fully documented metadata format and a consistent quality control (QC) procedure and quality flagging (QF) system. GO\n 2\n DAT will serve to support the development of advanced data analysis and biogeochemical models for improving our mapping, understanding and forecasting capabilities for ocean O₂\n changes and deoxygenation trends. It will offer the opportunity to develop quality-controlled data synthesis products with unprecedented spatial (vertical and horizontal) and temporal (sub-seasonal to multi-decadal) resolution. These products will support model assessment, improvement and evaluation as well as the development of climate and ocean health indicators. They will further support the decision-making processes associated with the emerging blue economy, the conservation of marine resources and their associated ecosystem services and the development of management tools required by a diverse community of users (e.g., environmental agencies, aquaculture, and fishing sectors). A better knowledge base of the spatial and temporal variations of marine O₂\n will improve our understanding of the ocean O₂\n budget, and allow better quantification of the Earth’s carbon and heat budgets. With the ever-increasing need to protect and sustainably manage ocean services, GO\n 2\n DAT will allow scientists to fully harness the increasing volumes of O₂\n data already delivered by the expanding global ocean observing system and enable smooth incorporation of much higher quantities of data from autonomous platforms in the open ocean and coastal areas into comprehensive data products in the years to come. This paper aims at engaging the community (e.g., scientists, data managers, policy makers, service users) toward the development of GO\n 2\n DAT within the framework of the UN Global Ocean Oxygen Decade (GOOD) program recently endorsed by IOC-UNESCO. A roadmap toward GO\n 2\n DAT is proposed highlighting the efforts needed (e.g., in terms of human resources).","published":"2021-12-21","volume":"8","scholar_pub_id":"ynWS968AAAAJ:ClCfbGk0d_YC","scholar_citations":71},{"filename":"Schwieterman et al., 2021 CBP-A.pdf","name":"Schwieterman et al., 2021 CBP-A","year":2021,"url":"https://rummerlab.com/papers/Schwieterman%20et%20al.%2C%202021%20CBP-A.pdf","title":"A lack of red blood cell swelling in five elasmobranch fishes following air exposure and exhaustive exercise","authors":["Gail D. Schwieterman","Jodie L. Rummer","Ian A. Bouyoucos","Peter G. Bushnell","Richard W. Brill"],"journal":"Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology","doi":"10.1016/j.cbpa.2021.110978","published":"2021-08","volume":"258","pages":"110978","scholar_pub_id":"ynWS968AAAAJ:VaXvl8Fpj5cC","scholar_citations":11},{"filename":"Dubuc et al., 2021 MER.pdf","name":"Dubuc et al., 2021 MER","year":2021,"url":"https://rummerlab.com/papers/Dubuc%20et%20al.%2C%202021%20MER.pdf","title":"Association between physiological performance and short temporal changes in habitat utilisation modulated by environmental factors","authors":["Alexia Dubuc","Geoffrey M. Collins","Laura Coleman","Nathan J. Waltham","Jodie L. Rummer","Marcus Sheaves"],"journal":"Marine Environmental Research","doi":"10.1016/j.marenvres.2021.105448","published":"2021-08","volume":"170","pages":"105448","scholar_pub_id":"ynWS968AAAAJ:q3CdL3IzO_QC","scholar_citations":13},{"filename":"Pereira Santos et al., 2021 Frontiers Marine Science.pdf","name":"Pereira Santos et al., 2021 Frontiers Marine Science","year":2021,"url":"https://rummerlab.com/papers/Pereira%20Santos%20et%20al.%2C%202021%20Frontiers%20Marine%20Science.pdf","title":"Elasmobranch Responses to Experimental Warming, Acidification, and Oxygen Loss—A Meta-Analysis","authors":["Catarina Pereira Santos","Eduardo Sampaio","Beatriz P. Pereira","Maria Rita Pegado","Francisco O. Borges","Carolyn R. Wheeler","Ian A. Bouyoucos","Jodie L. Rummer","Catarina Frazão Santos","Rui Rosa"],"journal":"Frontiers in Marine Science","doi":"10.3389/fmars.2021.735377","abstract":"Despite the long evolutionary history of this group, the challenges brought by the Anthropocene have been inflicting an extensive pressure over sharks and their relatives. Overexploitation has been driving a worldwide decline in elasmobranch populations, and rapid environmental change, triggered by anthropogenic activities, may further test this group's resilience. In this context, we searched the literature for peer-reviewed studies featuring a sustained (&gt;24 h) and controlled exposure of elasmobranch species to warming, acidification, and/or deoxygenation: three of the most pressing symptoms of change in the ocean. In a standardized comparative framework, we conducted an array of mixed-model meta-analyses (based on 368 control-treatment contrasts from 53 studies) to evaluate the effects of these factors and their combination as experimental treatments. We further compared these effects across different attributes (lineages, climates, lifestyles, reproductive modes, and life stages) and assessed the direction of impact over a comprehensive set of biological responses (survival, development, growth, aerobic metabolism, anaerobic metabolism, oxygen transport, feeding, behavior, acid-base status, thermal tolerance, hypoxia tolerance, and cell stress). Based on the present findings, warming appears as the most influential factor, with clear directional effects, namely decreasing development time and increasing aerobic metabolism, feeding, and thermal tolerance. While warming influence was pervasive across attributes, acidification effects appear to be more context-specific, with no perceivable directional trends across biological responses apart from the necessary to achieve acid-base balance. Meanwhile, despite its potential for steep impacts, deoxygenation has been the most neglected factor, with data paucity ultimately precluding sound conclusions. Likewise, the implementation of multi-factor treatments has been mostly restricted to the combination of warming and acidification, with effects approximately matching those of warming. Despite considerable progress over recent years, research regarding the impact of these drivers on elasmobranchs lags behind other taxa, with more research required to disentangle many of the observed effects. Given the current levels of extinction risk and the quick pace of global change, it is further crucial that we integrate the knowledge accumulated through different scientific approaches into a holistic perspective to better understand how this group may fare in a changing ocean.","published":"2021-10-01","volume":"8","scholar_pub_id":"ynWS968AAAAJ:edDO8Oi4QzsC","scholar_citations":36},{"filename":"Downie et al., 2021 Coral Reefs.pdf","name":"Downie et al., 2021 Coral Reefs","year":2021,"url":"https://rummerlab.com/papers/Downie%20et%20al.%2C%202021%20Coral%20Reefs.pdf","title":"Exposure to degraded coral habitat depresses oxygen uptake rate during exercise of a juvenile reef fish","authors":["Adam T. Downie","Caroline M. Phelps","Rhondda Jones","Jodie L. Rummer","Douglas P. Chivers","Maud C. O. Ferrari","Mark I. McCormick"],"journal":"Coral Reefs","doi":"10.1007/s00338-021-02113-x","published":"2021-08","volume":"40","issue":"4","pages":"1361-1367","scholar_pub_id":"ynWS968AAAAJ:M7yex6snE4oC","scholar_citations":8},{"filename":"Bouyoucos et al., 2021 STOTEN.pdf","name":"Bouyoucos et al., 2021 STOTEN","year":2021,"url":"https://rummerlab.com/papers/Bouyoucos%20et%20al.%2C%202021%20STOTEN.pdf","title":"Investigating links between thermal tolerance and oxygen supply capacity in shark neonates from a hyperoxic tropical environment","authors":["Ian A. Bouyoucos","José E. Trujillo","Ornella C. Weideli","Nao Nakamura","Johann Mourier","Serge Planes","Colin A. Simpfendorfer","Jodie L. Rummer"],"journal":"Science of The Total Environment","doi":"10.1016/j.scitotenv.2021.146854","published":"2021-08","volume":"782","pages":"146854","scholar_pub_id":"ynWS968AAAAJ:b1wdh0AR-JQC","scholar_citations":14},{"filename":"Prescott et al., 2021 JEB.pdf","name":"Prescott et al., 2021 JEB","year":2021,"url":"https://rummerlab.com/papers/Prescott%20et%20al.%2C%202021%20JEB.pdf","title":"Rapid embryonic development supports the early onset of gill functions in two coral reef damselfishes","authors":["Leteisha A. Prescott","Amy M. Regish","Shannon J. McMahon","Stephen D. McCormick","Jodie L. Rummer"],"journal":"Journal of Experimental Biology","doi":"10.1242/jeb.242364","abstract":"ABSTRACTThe gill is one of the most important organs for growth and survival of fishes. Early life stages in coral reef fishes often exhibit extreme physiological and demographic characteristics that are linked to well-established respiratory and ionoregulatory processes. However, gill development and function in coral reef fishes is not well understood. Therefore, we investigated gill morphology, oxygen uptake and ionoregulatory systems throughout embryogenesis in two coral reef damselfishes, Acanthochromis polyacanthus and Amphiprion melanopus (Pomacentridae). In both species, we found key gill structures to develop rapidly early in the embryonic phase. Ionoregulatory cells appear on gill filaments 3–4 days post-fertilization and increase in density, whilst disappearing or shrinking in cutaneous locations. Primary respiratory tissue (lamellae) appears 5–7 days post-fertilization, coinciding with a peak in oxygen uptake rates of the developing embryos. Oxygen uptake was unaffected by phenylhydrazine across all ages (pre-hatching), indicating that haemoglobin is not yet required for oxygen uptake. This suggests that gills have limited contribution to respiratory functions during embryonic development, at least until hatching. Rapid gill development in damselfishes, when compared with that in most previously investigated fishes, may reflect preparations for a high-performance, challenging lifestyle on tropical reefs, but may also make reef fishes more vulnerable to anthropogenic stressors.","published":"2021-11-15","volume":"224","issue":"22","scholar_pub_id":"ynWS968AAAAJ:PVjk1bu6vJQC","scholar_citations":3},{"filename":"Heinrich et al., 2021.pdf","name":"Heinrich et al., 2021","year":2021,"url":"https://rummerlab.com/papers/Heinrich%20et%20al.%2C%202021.pdf","title":"Short-term impacts of daily feeding on the residency, distribution and energy expenditure of sharks","authors":["Dennis Heinrich","Félicie Dhellemmes","Tristan L. Guttridge","Matthew Smukall","Culum Brown","Jodie L. Rummer","Samuel Gruber","Charlie Huveneers"],"journal":"Animal Behaviour","doi":"10.1016/j.anbehav.2020.12.002","published":"2021-02","volume":"172","pages":"55-71","scholar_pub_id":"ynWS968AAAAJ:vDijr-p_gm4C","scholar_citations":29},{"filename":"Schoen et al., 2021 CP.pdf","name":"Schoen et al., 2021 CP","year":2021,"url":"https://rummerlab.com/papers/Schoen%20et%20al.%2C%202021%20CP.pdf","title":"Simulated heatwave and fishing stressors alter corticosteroid and energy balance in neonate blacktip reef sharks, <i>Carcharhinus melanopterus</i>.","authors":["Alexandra N. Schoen","Ian A. Bouyoucos","W Gary Anderson","Catharine J. Wheaton","Serge Planes","Natalie D. Mylniczenko","Jodie L. Rummer"],"journal":"Conservation Physiology","doi":"10.1093/conphys/coab067","abstract":"Abstract\n The increasing frequency and duration of marine heatwaves attributed to climate change threatens coastal elasmobranchs and may exacerbate existing anthropogenic stressors. While the elasmobranch stress response has been well studied, the role of the unique corticosteroid—1α-hydroxycorticosterone (1α-OHB)—in energy balance is not understood. Therefore, 1α-OHB’s utility as a stress biomarker in elasmobranch conservation physiology is equivocal. Here, we analyse the roles of corticosteroids, 1α-OHB and corticosterone, and metabolites, glucose and 3-hydroxybutyrate (3-HB), in response to stress in a protected tropical shark species, the blacktip reef shark (Carcharhinus melanopterus). Wild-caught neonates were exposed to ambient (27°C) or heatwave conditions (29°C) and subsequently a simulated fishing stressor (1 min air exposure). Blood samples were taken prior to temperature exposure, prior to air exposure, and 30 min, 1 h, 24 h, and 48 h post-air exposure at treatment temperatures. Plasma 1α-OHB was elevated for 48 h in 27°C-exposed sharks but declined over time in 29°C-exposed sharks. Plasma 1α-OHB was not correlated with either metabolite. Plasma glucose was higher and plasma 3-HB was lower in 29°C-exposed sharks. In a separate experiment, blood samples were collected from both neonate and adult sharks immediately following capture and again 5 min later, and analysed for corticosteroids and metabolites. Plasma 1α-OHB increased in neonates within 5 min, but neonates displayed lower plasma 1α-OHB and higher glucose concentrations than adults. We conclude that 1α-OHB does not serve as a classic glucocorticoid role in C. melanopterus under these stressors. Furthermore, we show for the first time, ontogenetic differences in plasma 1α-OHB. Ultimately, our findings provide insights into hormonal control of energy mobilization during stress in C. melanopterus, particularly during simulated heatwave conditions, which seem to alter both endocrine and energy mobilization. Further work is needed to determine the utility of 1α-OHB as a biomarker for the mobilization of energy during a stress event in elasmobranchs.","published":"2021-01-01","volume":"9","issue":"1","scholar_pub_id":"ynWS968AAAAJ:XoXfffV-tXoC","scholar_citations":13},{"filename":"Downie et al., 2021 Fish and Fisheries.pdf","name":"Downie et al., 2021 Fish and Fisheries","year":2021,"url":"https://rummerlab.com/papers/Downie%20et%20al.%2C%202021%20Fish%20and%20Fisheries.pdf","title":"The influence of habitat association on swimming performance in marine teleost fish larvae","authors":["Adam T. Downie","Jeffrey M. Leis","Peter F. Cowman","Mark I. McCormick","Jodie L. Rummer"],"journal":"Fish and Fisheries","doi":"10.1111/faf.12580","abstract":"AbstractLatitude and body size are generally considered key drivers of swimming performance for larval marine fishes, but evidence suggests that evolutionary relationships and habitat may also be important. We used a comparative phylogenetic framework, data synthesis and case study approach to investigate how swimming performance differs among larvae of fish species across latitude. First, we investigated how swimming performance changed with body length, and we found that temperate reef fishes have the greatest increases in swimming performance with length. Secondly, we compared differences in three swimming performance metrics (critical swimming speed, in situ swimming, and endurance) among post‐flexion larvae, whilst considering phylogenetic relationships and morphology, and we found that reef fishes have higher swimming capacity than non‐reef (pelagic and non‐reef demersal) fishes, which is likely due to larger, more robust body sizes. Thirdly, we compared swimming performance of late‐stage larvae of tropical fishes with oceanographic data to better understand the ecological relevance of their high‐capacity swimming. We found that reef fishes have high swimming performance and grow larger than non‐reef fish larvae, which we suggest is due to the pressures to find a specific, patchily distributed habitat upon which to settle. Given the current bias towards studies on percomorph fishes at low latitudes, we highlight that there is a need for more research on temperate reef fish larvae and other percomorph lineages from high latitudes. Overall, our findings provide valuable context to understand how swimming and morphological traits that are important for dispersal and recruitment processes are selected for among teleost fish larvae.","published":"2021-11","volume":"22","issue":"6","pages":"1187-1212","scholar_pub_id":"ynWS968AAAAJ:e_rmSamDkqQC","scholar_citations":25},{"filename":"Downie et al., 2021.pdf","name":"Downie et al., 2021","year":2021,"url":"https://rummerlab.com/papers/Downie%20et%20al.%2C%202021.pdf","title":"The influence of habitat association on swimming performance in marine teleost fish larvae","authors":["Adam T. Downie","Jeffrey M. Leis","Peter F. Cowman","Mark I. McCormick","Jodie L. Rummer"],"journal":"Fish and Fisheries","doi":"10.1111/faf.12580","abstract":"AbstractLatitude and body size are generally considered key drivers of swimming performance for larval marine fishes, but evidence suggests that evolutionary relationships and habitat may also be important. We used a comparative phylogenetic framework, data synthesis and case study approach to investigate how swimming performance differs among larvae of fish species across latitude. First, we investigated how swimming performance changed with body length, and we found that temperate reef fishes have the greatest increases in swimming performance with length. Secondly, we compared differences in three swimming performance metrics (critical swimming speed, in situ swimming, and endurance) among post‐flexion larvae, whilst considering phylogenetic relationships and morphology, and we found that reef fishes have higher swimming capacity than non‐reef (pelagic and non‐reef demersal) fishes, which is likely due to larger, more robust body sizes. Thirdly, we compared swimming performance of late‐stage larvae of tropical fishes with oceanographic data to better understand the ecological relevance of their high‐capacity swimming. We found that reef fishes have high swimming performance and grow larger than non‐reef fish larvae, which we suggest is due to the pressures to find a specific, patchily distributed habitat upon which to settle. Given the current bias towards studies on percomorph fishes at low latitudes, we highlight that there is a need for more research on temperate reef fish larvae and other percomorph lineages from high latitudes. Overall, our findings provide valuable context to understand how swimming and morphological traits that are important for dispersal and recruitment processes are selected for among teleost fish larvae.","published":"2021-11","volume":"22","issue":"6","pages":"1187-1212","scholar_pub_id":"ynWS968AAAAJ:e_rmSamDkqQC","scholar_citations":25},{"filename":"Madliger et al., 2021 CP.pdf","name":"Madliger et al., 2021 CP","year":2021,"url":"https://rummerlab.com/papers/Madliger%20et%20al.%2C%202021%20CP.pdf","title":"The second warning to humanity: contributions and solutions from conservation physiology","authors":["Christine L. Madliger","Craig E. Franklin","Steven L. Chown","Andrea Fuller","Kevin R. Hultine","David Costantini","William A. Hopkins","Myron A. Peck","Jodie L. Rummer","Lawren Sack","Craig K R Willis","Steven J. Cooke"],"journal":"Conservation Physiology","doi":"10.1093/conphys/coab038","abstract":"Abstract\n In 1992, the Union of Concerned Scientists shared their ‘World Scientists’ Warning to Humanity’ with governmental leaders worldwide, calling for immediate action to halt the environmental degradation that threatens the systems that support life on Earth. A follow-up ‘Second Warning’ was released in 2017, with over 15 000 scientists as signatories, describing the lack of progress in adopting the sustainable practices necessary to safeguard the biosphere. In their ‘Second Warning’, Ripple and colleagues provided 13 ‘diverse and effective steps humanity can take to transition to sustainability.’ Here, we discuss how the field of conservation physiology can contribute to six of these goals: (i) prioritizing connected, well-managed reserves; (ii) halting the conversion of native habitats to maintain ecosystem services; (iii) restoring native plant communities; (iv) rewilding regions with native species; (v) developing policy instruments; and (vi) increasing outdoor education, societal engagement and reverence for nature. Throughout, we focus our recommendations on specific aspects of physiological function while acknowledging that the exact traits that will be useful in each context are often still being determined and refined. However, for each goal, we include a short case study to illustrate a specific physiological trait or group of traits that is already being utilized in that context. We conclude with suggestions for how conservation physiologists can broaden the impact of their science aimed at accomplishing the goals of the ‘Second Warning’. Overall, we provide an overview of how conservation physiology can contribute to addressing the grand socio-environmental challenges of our time.","published":"2021-01-01","volume":"9","issue":"1","scholar_pub_id":"ynWS968AAAAJ:-FonjvnnhkoC","scholar_citations":12},{"filename":"Wheeler et al., 2020.pdf","name":"Wheeler et al., 2020","year":2020,"url":"https://rummerlab.com/papers/Wheeler%20et%20al.%2C%202020.pdf","title":"Anthropogenic stressors influence reproduction and development in elasmobranch fishes","authors":["Carolyn R. Wheeler","Connor R. Gervais","Martijn S. Johnson","Shelby Vance","Rui Rosa","John W. Mandelman","Jodie L. Rummer"],"journal":"Reviews in Fish Biology and Fisheries","doi":"10.1007/s11160-020-09604-0","published":"2020-06","volume":"30","issue":"2","pages":"373-386","scholar_pub_id":"ynWS968AAAAJ:kzcrU_BdoSEC","scholar_citations":70},{"filename":"Laubenstein and Rummer, 2020 Ch. 18 Conservation Physiology.pdf","name":"Laubenstein and Rummer, 2020 Ch. 18 Conservation Physiology","year":2020,"url":"https://rummerlab.com/papers/Laubenstein%20and%20Rummer%2C%202020%20Ch.%2018%20Conservation%20Physiology.pdf","title":"Communication in conservation physiology","authors":["Taryn D. Laubenstein","Jodie L. Rummer"],"book":"Conservation Physiology","doi":"10.1093/oso/9780198843610.003.0018","abstract":"Findings from conservation physiology studies can provide critical information to decision makers so that conservation actions can be achieved. Yet the path from evidence-based recommendations to actions can be fraught with competing political, social, and economic interests, meaning that even the most robust science may not be incorporated at the decision-making stage. It is therefore critical that conservation physiologists familiarize themselves with communication and engagement strategies to ensure that their results are applied to conservation actions. Here we outline four methods—knowledge co-production, collaboration with social scientists, citizen science, and social media—that conservation physiologists can use to increase the impact of their work. We discuss the benefits and disadvantages of each method and give advice on how to successfully integrate any or all of these methods into a research programme. Finally, we look towards the future of communication and collaboration to see how the skills discussed here can be spread to the broader scientific community.","published":"2020-11-30","pages":"303-318"},{"filename":"Rummer and Brauner 2020 Ch. 3 in The Physiology of Fishes.pdf","name":"Rummer and Brauner 2020 Ch. 3 in The Physiology of Fishes","year":2020,"url":"https://rummerlab.com/papers/Rummer%20and%20Brauner%202020%20Ch.%203%20in%20The%20Physiology%20of%20Fishes.pdf","title":"Gas Exchange","authors":["Jodie L. Rummer","Colin J. Brauner"],"book":"The Physiology of Fishes","pages":"33-47","scholar_pub_id":"ynWS968AAAAJ:fEOibwPWpKIC","scholar_citations":1},{"filename":"Bouyoucos et al., 2020 Coral Reefs.pdf","name":"Bouyoucos et al., 2020 Coral Reefs","year":2020,"url":"https://rummerlab.com/papers/Bouyoucos%20et%20al.%2C%202020%20Coral%20Reefs.pdf","title":"Home range of newborn blacktip reef sharks (<i>Carcharhinus melanopterus</i>), as estimated using mark-recapture and acoustic telemetry","authors":["Ian A. Bouyoucos","Martin Romain","Lorine Azoulai","Kim Eustache","Johann Mourier","Jodie L. Rummer","Serge Planes"],"journal":"Coral Reefs","doi":"10.1007/s00338-020-01965-z","published":"2020-10","volume":"39","issue":"5","pages":"1209-1214","scholar_pub_id":"ynWS968AAAAJ:Fu2w8maKXqMC","scholar_citations":20},{"filename":"Bouyoucos and Rummer 2020 Conservation physiology- Integrating physiology into animal conservation and management. .pdf","name":"Bouyoucos and Rummer 2020 Conservation physiology- Integrating physiology into animal conservation and management. ","year":2020,"url":"https://rummerlab.com/papers/Bouyoucos%20and%20Rummer%202020%20Conservation%20physiology-%20Integrating%20physiology%20into%20animal%20conservation%20and%20management.%20.pdf","title":"Improving ‘shark park’ protections under threat from climate change using the conservation physiology toolbox","authors":["Ian A. Bouyoucos","Jodie L. Rummer"],"book":"Conservation Physiology","doi":"10.1093/oso/9780198843610.003.0011","abstract":"Sharks and rays are among the most threatened aquatic vertebrate taxa. This is due to a combination of their slow generation times, exploitation within the fisheries, and habitat degradation. Climate change was added as an additional, major threat to sharks and rays in the first decade of the 21st century. While marine protected areas are becoming more widespread, managing and conserving sharks and rays is complicated. Yet, the conservation physiology toolbox can be used to address such challenges. Here, we highlight studies from the Physioshark project, a conservation physiology research programme initiated to understand how human-induced stressors, primarily climate change, will affect tropical sharks and rays and the consequences for the health and viability of populations. We also highlight how other research teams from around the world have taken physiological approaches to understanding conservation problems for sharks. We then emphasize the importance of public outreach and education about the conservation issues sharks encounter, the benefits of using social media to disseminate key concepts, publications, presentations, media, and successes, and we underscore the power of storytelling through digital media as an important means for attracting attention to research, which can result in support and action.","published":"2020-11-30","pages":"185-204","scholar_pub_id":"ynWS968AAAAJ:WJVC3Jt7v1AC","scholar_citations":6},{"filename":"Cooke et al., 2020 Ch. 19 in Conservation physiology- Integrating physiology into animal conservation and management..pdf","name":"Cooke et al., 2020 Ch. 19 in Conservation physiology- Integrating physiology into animal conservation and management.","year":2020,"url":"https://rummerlab.com/papers/Cooke%20et%20al.%2C%202020%20Ch.%2019%20in%20Conservation%20physiology-%20Integrating%20physiology%20into%20animal%20conservation%20and%20management..pdf","title":"Optimism and opportunities for conservation physiology in the Anthropocene","authors":["Steven J. Cooke","Christine L. Madliger","Jordanna N. Bergman","Vivian M. Nguyen","Sean J. Landsman","Oliver P. Love","Jodie L. Rummer","Craig E. Franklin"],"book":"Conservation Physiology","doi":"10.1093/oso/9780198843610.003.0019","abstract":"We discuss 12 themes that emerged from the set of case studies comprising the text, namely: (1) mechanisms matter for conservation; (2) physiology is just one source of knowledge; (3) physiology and behaviour are intertwined; (4) new tools and technologies should be embraced; (5) physiology can be valuable in captive settings; (6) conservation physiology extends across scales; (7) physiology can be incorporated into long-term monitoring programmes; (8) conservation physiology is applicable to invertebrates; (9) non-imperilled species deserve attention; (10) successful application is increased by co-production; (11) sharing success stories is important; and (12) findings should be communicated across a variety of platforms. We end the chapter with a discussion of some of the challenges currently being faced in the discipline, and with a message of optimism for the future.","published":"2020-11-30","pages":"319-330"},{"filename":"Downie et al., 2020.pdf","name":"Downie et al., 2020","year":2020,"url":"https://rummerlab.com/papers/Downie%20et%20al.%2C%202020.pdf","title":"Swimming performance of marine fish larvae: review of a universal trait under ecological and environmental pressure","authors":["Adam T. Downie","Björn Illing","Ana M. Faria","Jodie L. Rummer"],"journal":"Reviews in Fish Biology and Fisheries","doi":"10.1007/s11160-019-09592-w","published":"2020-03","volume":"30","issue":"1","pages":"93-108","scholar_pub_id":"ynWS968AAAAJ:Y5dfb0dijaUC","scholar_citations":81},{"filename":"Bouyoucos et al., 2020 JEB.pdf","name":"Bouyoucos et al., 2020 JEB","year":2020,"url":"https://rummerlab.com/papers/Bouyoucos%20et%20al.%2C%202020%20JEB.pdf","title":"Thermal tolerance and hypoxia tolerance are associated in blacktip reef shark ( <i>Carcharhinus melanopterus</i> ) neonates","authors":["Ian A. Bouyoucos","Phillip R. Morrison","Ornella C. Weideli","Eva Jacquesson","Serge Planes","Colin A. Simpfendorfer","Colin J. Brauner","Jodie L. Rummer"],"journal":"Journal of Experimental Biology","doi":"10.1242/jeb.221937","abstract":"ABSTRACT\n Thermal dependence of growth and metabolism can influence thermal preference and tolerance in marine ectotherms, including threatened and data-deficient species. Here, we quantified the thermal dependence of physiological performance in neonates of a tropical shark species (blacktip reef shark, Carcharhinus melanopterus) from shallow, nearshore habitats. We measured minimum and maximum oxygen uptake rates (ṀO2), calculated aerobic scope, excess post-exercise oxygen consumption and recovery from exercise, and measured critical thermal maxima (CTmax), thermal safety margins, hypoxia tolerance, specific growth rates, body condition and food conversion efficiencies at two ecologically relevant acclimation temperatures (28 and 31°C). Owing to high post-exercise mortality, a third acclimation temperature (33°C) was not investigated further. Acclimation temperature did not affect ṀO2 or growth, but CTmax and hypoxia tolerance were greatest at 31°C and positively associated. We also quantified in vitro temperature (25, 30 and 35°C) and pH effects on haemoglobin–oxygen (Hb–O₂) affinity of wild-caught, non-acclimated sharks. As expected, Hb–O₂ affinity decreased with increasing temperatures, but pH effects observed at 30°C were absent at 25 and 35°C. Finally, we logged body temperatures of free-ranging sharks and determined that C. melanopterus neonates avoided 31°C in situ. We conclude that C. melanopterus neonates demonstrate minimal thermal dependence of whole-organism physiological performance across a seasonal temperature range and may use behaviour to avoid unfavourable environmental temperatures. The association between thermal tolerance and hypoxia tolerance suggests a common mechanism warranting further investigation. Future research should explore the consequences of ocean warming, especially in nearshore, tropical species.","published":"2020-07-15","volume":"223","issue":"14","scholar_pub_id":"ynWS968AAAAJ:35r97b3x0nAC","scholar_citations":38},{"filename":"Laubenstein et al. 2019 Scientific Reports.pdf","name":"Laubenstein et al. 2019 Scientific Reports","year":2019,"url":"https://rummerlab.com/papers/Laubenstein%20et%20al.%202019%20Scientific%20Reports.pdf","title":"A negative correlation between behavioural and physiological performance under ocean acidification and warming","authors":["Taryn D. Laubenstein","Jodie L. Rummer","Mark I. McCormick","Philip L. Munday"],"journal":"Scientific Reports","doi":"10.1038/s41598-018-36747-9","abstract":"AbstractMany studies have examined the average effects of ocean acidification and warming on phenotypic traits of reef fishes, finding variable, but often negative effects on behavioural and physiological performance. Yet the presence and nature of a relationship between these traits is unknown. A negative relationship between phenotypic traits could limit individual performance and even the capacity of populations to adapt to climate change. Here, we examined the relationship between behavioural and physiological performance of a juvenile reef fish under elevated CO₂ and temperature in a full factorial design. Behaviourally, the response to an alarm odour was negatively affected by elevated CO₂, but not elevated temperature. Physiologically, aerobic scope was significantly diminished under elevated temperature, but not under elevated CO₂. At the individual level, there was no relationship between behavioural and physiological traits in the control and single-stressor treatments. However, a statistically significant negative relationship was detected between the traits in the combined elevated CO₂ and temperature treatment. Our results demonstrate that trade-offs in performance between behavioural and physiological traits may only be evident when multiple climate change stressors are considered, and suggest that this negative relationship could limit adaptive potential to climate change.","published":"2019-03-12","volume":"9","issue":"1","scholar_pub_id":"ynWS968AAAAJ:WbkHhVStYXYC","scholar_citations":45},{"filename":"Munday et al., 2019 Ch. 10 Fish Physiology Vol 37.pdf","name":"Munday et al., 2019 Ch. 10 Fish Physiology Vol 37","year":2019,"url":"https://rummerlab.com/papers/Munday%20et%20al.%2C%202019%20Ch.%2010%20Fish%20Physiology%20Vol%2037.pdf","title":"Adaptation and evolutionary responses to high CO₂","authors":["Philip L. Munday","Jodie L. Rummer","Hannes Baumann"],"book":"Fish Physiology","doi":"10.1016/bs.fp.2019.07.006","published":"2019","pages":"369-395","scholar_pub_id":"ynWS968AAAAJ:olpn-zPbct0C","scholar_citations":13},{"filename":"Bouyoucos et al., 2019.pdf","name":"Bouyoucos et al., 2019","year":2019,"url":"https://rummerlab.com/papers/Bouyoucos%20et%20al.%2C%202019.pdf","title":"Estimating oxygen uptake rates to understand stress in sharks and rays","authors":["Ian A. Bouyoucos","Colin A. Simpfendorfer","Jodie L. Rummer"],"journal":"Reviews in Fish Biology and Fisheries","doi":"10.1007/s11160-019-09553-3","published":"2019-04-10","scholar_pub_id":"ynWS968AAAAJ:08ZZubdj9fEC","scholar_citations":27},{"filename":"Bouyoucos et al., 2018 ConPhys.pdf","name":"Bouyoucos et al., 2018 ConPhys","year":2018,"url":"https://rummerlab.com/papers/Bouyoucos%20et%20al.%2C%202018%20ConPhys.pdf","title":"Dead tired: evaluating the physiological status and survival of neonatal reef sharks under stress","authors":["Ian A. Bouyoucos","Ornella C. Weideli","Serge Planes","Colin A. Simpfendorfer","Jodie L. Rummer"],"journal":"Conservation Physiology","doi":"10.1093/conphys/coy053","published":"2018-01-01","volume":"6","issue":"1","scholar_pub_id":"ynWS968AAAAJ:4OULZ7Gr8RgC","scholar_citations":50},{"filename":"Rummer and Munday 2016 Fish and Fisheries.pdf","name":"Rummer and Munday 2016 Fish and Fisheries","year":2017,"url":"https://rummerlab.com/papers/Rummer%20and%20Munday%202016%20Fish%20and%20Fisheries.pdf","title":"Climate change and the evolution of reef fishes: past and future","authors":["Jodie L. Rummer","Philip L. Munday"],"journal":"Fish and Fisheries","doi":"10.1111/faf.12164","abstract":"Abstract\n \n Predicting the impacts of ocean warming and acidification on marine ecosystems requires an evolutionary perspective because, for most marine species, these environmental changes will occur over a number of generations. Acclimation through phenotypic plasticity and adaptation through genetic selection could help populations of some species cope with future warmer and more acidic oceans. Coral reef species are predicted to be some of the most vulnerable to climate change because they live close to their thermal limits. Yet, their evolutionary history may indicate that they possess adaptations that enable them to cope with a high\n CO₂\n environment. Here, we first explore the evolutionary history of reef fishes and how their history has shaped their physiological adaptations to environmental temperatures and\n PCO₂. We examine current‐day thermal and\n CO₂\n environments experienced by coral reef fishes and summarize experimental studies that have tested how they respond to elevated temperatures and\n PCO₂\n levels. We then examine evidence for acclimation and adaptation to projected ocean warming and acidification. Indeed, new studies have demonstrated the potential for transgenerational plasticity and heritable genetic variation that would allow some fishes to maintain performance as the oceans warm and become more acidic. We conclude by outlining management approaches – specifically those that can help preserve genetic variation by maintaining population size – to enhance the potential for genetic adaptation to climate change.","published":"2017-01","volume":"18","issue":"1","pages":"22-39","scholar_pub_id":"ynWS968AAAAJ:iH-uZ7U-co4C","scholar_citations":68},{"filename":"Brauner and Rummer, 2024 Gas transport and exchange- Interaction between O2 and CO2 exchange.pdf","name":"Brauner and Rummer, 2024 Gas transport and exchange- Interaction between O2 and CO2 exchange","year":2017,"url":"https://rummerlab.com/papers/Brauner%20and%20Rummer%2C%202024%20Gas%20transport%20and%20exchange-%20Interaction%20between%20O2%20and%20CO2%20exchange.pdf","title":"Gas Transport and Exchange: Interaction Between O₂ and CO₂ Exchange","authors":["C.J. Brauner","T.S. Harter","Jodie L. Rummer"],"book":"Reference Module in Life Sciences","doi":"10.1016/B978-0-12-809633-8.03114-9","published":"2017","scholar_pub_id":"ynWS968AAAAJ:k_IJM867U9cC","scholar_citations":8},{"filename":"Brauner et al, 2017 Life Sciences Module Interaction between O2 and CO2.pdf","name":"Brauner et al, 2017 Life Sciences Module Interaction between O2 and CO2","year":2017,"url":"https://rummerlab.com/papers/Brauner%20et%20al%2C%202017%20Life%20Sciences%20Module%20Interaction%20between%20O2%20and%20CO2.pdf","title":"Gas Transport and Exchange: Interaction Between O₂ and CO₂ Exchange","authors":["C.J. Brauner","T.S. Harter","Jodie L. Rummer"],"book":"Reference Module in Life Sciences","doi":"10.1016/B978-0-12-809633-8.03114-9","published":"2017","scholar_pub_id":"ynWS968AAAAJ:k_IJM867U9cC","scholar_citations":8},{"filename":"Johansen et al., 2017 NEE.pdf","name":"Johansen et al., 2017 NEE","year":2017,"url":"https://rummerlab.com/papers/Johansen%20et%20al.%2C%202017%20NEE.pdf","title":"Oil exposure disrupts early life-history stages of coral reef fishes via behavioural impairments","authors":["Jacob L. Johansen","Bridie J. M. Allan","Jodie L. Rummer","Andrew J. Esbaugh"],"journal":"Nature Ecology & Evolution","doi":"10.1038/s41559-017-0232-5","published":"2017-07-17","volume":"1","issue":"8","pages":"1146-1152","scholar_pub_id":"ynWS968AAAAJ:NaGl4SEjCO4C","scholar_citations":96},{"filename":"Illing and Rummer, 2017 ConPhys.pdf","name":"Illing and Rummer, 2017 ConPhys","year":2017,"url":"https://rummerlab.com/papers/Illing%20and%20Rummer%2C%202017%20ConPhys.pdf","title":"Physiology can contribute to better understanding, management, and conservation of coral reef fishes","authors":["Björn Illing","Jodie L. Rummer"],"journal":"Conservation Physiology","doi":"10.1093/conphys/cox005","published":"2017","volume":"5","issue":"1","scholar_pub_id":"ynWS968AAAAJ:JV2RwH3_ST0C","scholar_citations":22},{"filename":"Hess et al., 2017 ProcB.pdf","name":"Hess et al., 2017 ProcB","year":2017,"url":"https://rummerlab.com/papers/Hess%20et%20al.%2C%202017%20ProcB.pdf","title":"Species-specific impacts of suspended sediments on gill structure and function in coral reef fishes","authors":["Sybille Hess","Leteisha J. Prescott","Andrew S. Hoey","Shannon A. McMahon","Amelia S. Wenger","Jodie L. Rummer"],"journal":"Proceedings of the Royal Society B: Biological Sciences","doi":"10.1098/rspb.2017.1279","abstract":"Reduced water quality, in particular increases in suspended sediments, has been linked to declines in fish abundance on coral reefs. Changes in gill structure induced by suspended sediments have been hypothesized to impair gill function and may provide a mechanistic basis for the observed declines; yet, evidence for this is lacking. We exposed juveniles of three reef fish species (\n Amphiprion melanopus,\n Amphiprion percula\n and\n Acanthochromis polyacanthus\n ) to suspended sediments (0–180 mg l\n −1\n ) for 7 days and examined changes in gill structure and metabolic performance (i.e. oxygen consumption). Exposure to suspended sediments led to shorter gill lamellae in\n A. melanopus\n and\n A. polyacanthus\n and reduced oxygen diffusion distances in all three species. While\n A. melanopus\n exhibited impaired oxygen uptake after suspended sediment exposure, i.e. decreased maximum and increased resting oxygen consumption rates resulting in decreased aerobic scope, the oxygen consumption rates of the other two species remained unaffected. These findings imply that species sensitive to changes in gill structure such as\n A. melanopus\n may decline in abundance as reefs become more turbid, whereas species that are able to maintain metabolic performance despite suspended sediment exposure, such as\n A. polyacanthus\n or\n A. percula, may be able to persist or gain a competitive advantage.","published":"2017-11-15","volume":"284","issue":"1866","pages":"20171279","scholar_pub_id":"ynWS968AAAAJ:J_g5lzvAfSwC","scholar_citations":69},{"filename":"Cinner_etal_REConline.pdf","name":"Cinner_etal_REConline","year":2016,"url":"https://rummerlab.com/papers/Cinner_etal_REConline.pdf","title":"A framework for understanding climate change impacts on coral reef social–ecological systems","authors":["Joshua Eli Cinner","Morgan Stuart Pratchett","Nicholas Anthony James Graham","Vanessa Messmer","Mariana Menezes Prata Bezerra Fuentes","Tracy Ainsworth","Natalie Ban","Line Kolind Bay","Jessica Blythe","Delphine Dissard","Simon Dunn","Louisa Evans","Michael Fabinyi","Pedro Fidelman","Joana Figueiredo","Ashley John Frisch","Christopher John Fulton","Christina Chemtai Hicks","Vimoksalehi Lukoschek","Jennie Mallela","Aurelie Moya","Lucie Penin","Jodie L. Rummer","Stefan Walker","David Hall Williamson"],"journal":"Regional Environmental Change","doi":"10.1007/s10113-015-0832-z","published":"2016-04","volume":"16","issue":"4","pages":"1133-1146","scholar_pub_id":"ynWS968AAAAJ:HDshCWvjkbEC","scholar_citations":82},{"filename":"Heuer et al., 2016.pdf","name":"Heuer et al., 2016","year":2016,"url":"https://rummerlab.com/papers/Heuer%20et%20al.%2C%202016.pdf","title":"Altered brain ion gradients following compensation for elevated CO₂ are linked to behavioural alterations in a coral reef fish","authors":["R. M. Heuer","M. J. Welch","Jodie L. Rummer","P. L. Munday","M. Grosell"],"journal":"Scientific Reports","doi":"10.1038/srep33216","abstract":"AbstractNeurosensory and behavioural disruptions are some of the most consistently reported responses upon exposure to ocean acidification-relevant CO₂ levels, especially in coral reef fishes. The underlying cause of these disruptions is thought to be altered current across the GABAA receptor in neuronal cells due to changes in ion gradients (HCO3− and/or Cl−) that occur in the body following compensation for elevated ambient CO₂. Despite these widely-documented behavioural disruptions, the present study is the first to pair a behavioural assay with measurements of relevant intracellular and extracellular acid-base parameters in a coral reef fish exposed to elevated CO₂. Spiny damselfish (Acanthochromis polyacanthus) exposed to 1900 μatm CO₂ for 4 days exhibited significantly increased intracellular and extracellular HCO3− concentrations and elevated brain pHi compared to control fish, providing evidence of CO₂ compensation. As expected, high CO₂ exposed damselfish spent significantly more time in a chemical alarm cue (CAC) than control fish, supporting a potential link between behavioural disruption and CO₂ compensation. Using HCO3− measurements from the damselfish, the reversal potential for GABAA (EGABA) was calculated, illustrating that biophysical properties of the brain during CO₂ compensation could change GABAA receptor function and account for the behavioural disturbances noted during exposure to elevated CO₂.","published":"2016-09-13","volume":"6","issue":"1","scholar_pub_id":"ynWS968AAAAJ:TFP_iSt0sucC","scholar_citations":90},{"filename":"Gervais et al. 2016.pdf","name":"Gervais et al. 2016","year":2016,"url":"https://rummerlab.com/papers/Gervais%20et%20al.%202016.pdf","title":"Developing in warm water: irregular colouration and patterns of a neonate elasmobranch","authors":["C. Gervais","J. Mourier","Jodie L. Rummer"],"journal":"Marine Biodiversity","doi":"10.1007/s12526-015-0429-2","published":"2016-12","volume":"46","issue":"4","pages":"743-744","scholar_pub_id":"ynWS968AAAAJ:_Qo2XoVZTnwC","scholar_citations":29},{"filename":"Heinrich et al., 2015.pdf","name":"Heinrich et al., 2015","year":2016,"url":"https://rummerlab.com/papers/Heinrich%20et%20al.%2C%202015.pdf","title":"Foraging behaviour of the epaulette shark <i>Hemiscyllium ocellatum</i> is not affected by elevated CO₂","authors":["Dennis D. U. Heinrich","Sue-Ann Watson","Jodie L. Rummer","Simon J. Brandl","Colin A. Simpfendorfer","Michelle R. Heupel","Philip L. Munday"],"journal":"ICES Journal of Marine Science","doi":"10.1093/icesjms/fsv085","abstract":"Abstract\n Increased oceanic uptake of atmospheric carbon dioxide (CO₂) is a threat to marine organisms and ecosystems. Among the most dramatic consequences predicted to date are behavioural impairments in marine fish which appear to be caused by the interference of elevated CO₂ with a key neurotransmitter receptor in the brain. In this study, we tested the effects of elevated CO₂ on the foraging and shelter-seeking behaviours of the reef-dwelling epaulette shark, Hemiscyllium ocellatum. Juvenile sharks were exposed for 30 d to control CO₂ (400 µatm) and two elevated CO₂ treatments (615 and 910 µatm), consistent with medium- and high-end projections for ocean PCO₂ by 2100. Contrary to the effects observed in teleosts and in some other sharks, behaviour of the epaulette shark was unaffected by elevated CO₂. A potential explanation is the remarkable adaptation of H. ocellatum to low environmental oxygen conditions (hypoxia) and diel fluctuations in CO₂ encountered in their shallow reef habitat. This ability translates into behavioural tolerance of near-future ocean acidification, suggesting that behavioural tolerance and subsequent adaptation to projected future CO₂ levels might be possible in some other fish, if adaptation can keep pace with the rate of rising CO₂ levels.","published":"2016-03-01","volume":"73","issue":"3","pages":"633-640","scholar_pub_id":"ynWS968AAAAJ:qUcmZB5y_30C","scholar_citations":67},{"filename":"Rummer et al., 2016 Conservation Physiology.pdf","name":"Rummer et al., 2016 Conservation Physiology","year":2016,"url":"https://rummerlab.com/papers/Rummer%20et%20al.%2C%202016%20Conservation%20Physiology.pdf","title":"Methods matter: considering locomotory mode and respirometry technique when estimating metabolic rates of fishes","authors":["Jodie L. Rummer","Sandra A. Binning","Dominique G. Roche","Jacob L. Johansen"],"journal":"Conservation Physiology","doi":"10.1093/conphys/cow008","published":"2016","volume":"4","issue":"1","pages":"cow008","scholar_pub_id":"ynWS968AAAAJ:4JMBOYKVnBMC","scholar_citations":108},{"filename":"Johnson et al., 2016 Conserv Physiol.pdf","name":"Johnson et al., 2016 Conserv Physiol","year":2016,"url":"https://rummerlab.com/papers/Johnson%20et%20al.%2C%202016%20Conserv%20Physiol.pdf","title":"Will ocean acidification affect the early ontogeny of a tropical oviparous elasmobranch ( <i>Hemiscyllium ocellatum</i> )?","authors":["Martijn S. Johnson","Daniel W. Kraver","Gillian M. C. Renshaw","Jodie L. Rummer"],"journal":"Conservation Physiology","doi":"10.1093/conphys/cow003","published":"2016","volume":"4","issue":"1","pages":"cow003","scholar_pub_id":"ynWS968AAAAJ:RHpTSmoSYBkC","scholar_citations":36},{"filename":"Nay et al., 2015 Coral Reefs.pdf","name":"Nay et al., 2015 Coral Reefs","year":2015,"url":"https://rummerlab.com/papers/Nay%20et%20al.%2C%202015%20Coral%20Reefs.pdf","title":"Behavioural thermoregulation in a temperature-sensitive coral reef fish, the five-lined cardinalfish (<i>Cheilodipterus quinquelineatus</i>)","authors":["Tiffany J. Nay","Jacob L. Johansen","Adam Habary","John F. Steffensen","Jodie L. Rummer"],"journal":"Coral Reefs","doi":"10.1007/s00338-015-1353-4","published":"2015-12","volume":"34","issue":"4","pages":"1261-1265","scholar_pub_id":"ynWS968AAAAJ:TQgYirikUcIC","scholar_citations":44},{"filename":"Chin et al., 2015 Cons Physiol.pdf","name":"Chin et al., 2015 Cons Physiol","year":2015,"url":"https://rummerlab.com/papers/Chin%20et%20al.%2C%202015%20Cons%20Physiol.pdf","title":"Blacktip reef sharks (<i>Carcharhinus melanopterus</i>) show high capacity for wound healing and recovery following injury","authors":["Andrew Chin","Johann Mourier","Jodie L. Rummer"],"journal":"Conservation Physiology","doi":"10.1093/conphys/cov062","published":"2015","volume":"3","issue":"1","pages":"cov062","scholar_pub_id":"ynWS968AAAAJ:e5wmG9Sq2KIC","scholar_citations":104},{"filename":"Hess et al., 2015.pdf","name":"Hess et al., 2015","year":2015,"url":"https://rummerlab.com/papers/Hess%20et%20al.%2C%202015.pdf","title":"Exposure of clownfish larvae to suspended sediment levels found on the Great Barrier Reef: Impacts on gill structure and microbiome","authors":["Sybille Hess","Amelia S. Wenger","Tracy D. Ainsworth","Jodie L. Rummer"],"journal":"Scientific Reports","doi":"10.1038/srep10561","abstract":"Abstract\n \n Worldwide, increasing coastal development has played a major role in shaping coral reef species assemblages, but the mechanisms underpinning distribution patterns remain poorly understood. Recent research demonstrated delayed development in larval fishes exposed to suspended sediment, highlighting the need to further understand the interaction between suspended sediment as a stressor and energetically costly activities such as growth and development that are essential to support biological fitness. We examined the gill morphology and the gill microbiome in clownfish larvae (\n Amphiprion percula\n ) exposed to suspended sediment concentrations (using Australian bentonite) commonly found on the inshore Great Barrier Reef. The gills of larvae exposed to 45 mg L\n −1\n of suspended sediment had excessive mucous discharge and growth of protective cell layers, resulting in a 56% thicker gill epithelium compared to fish from the control group. Further, we found a shift from ‘healthy’ to pathogenic bacterial communities on the gills, which could increase the disease susceptibility of larvae. The impact of suspended sediments on larval gills may represent an underlying mechanism behind the distribution patterns of fish assemblages. Our findings underscore the necessity for future coastal development to consider adverse effects of suspended sediments on fish recruitment and consequently fish populations and ecosystem health.","published":"2015-06-22","volume":"5","issue":"1","scholar_pub_id":"ynWS968AAAAJ:mB3voiENLucC","scholar_citations":138},{"filename":"Baker et al., 2015.pdf","name":"Baker et al., 2015","year":2015,"url":"https://rummerlab.com/papers/Baker%20et%20al.%2C%202015.pdf","title":"Hagfish: Champions of CO₂ tolerance question the origins of vertebrate gill function","authors":["Daniel W. Baker","Brian Sardella","Jodie L. Rummer","Michael Sackville","Colin J. Brauner"],"journal":"Scientific Reports","doi":"10.1038/srep11182","abstract":"AbstractThe gill is widely accepted to have played a key role in the adaptive radiation of early vertebrates by supplanting the skin as the dominant site of gas exchange. However, in the most basal extant craniates, the hagfishes, gills play only a minor role in gas exchange. In contrast, we found hagfish gills to be associated with a tremendous capacity for acid-base regulation. Indeed, Pacific hagfish exposed acutely to severe sustained hypercarbia tolerated among the most severe blood acidoses ever reported (1.2 pH unit reduction) and subsequently exhibited the greatest degree of acid-base compensation ever observed in an aquatic chordate. This was accomplished through an unprecedented increase in plasma [HCO3−] (>75 mM) in exchange for [Cl−]. We thus propose that the first physiological function of the ancestral gill was acid-base regulation and that the gill was later co-opted for its central role in gas exchange in more derived aquatic vertebrates.","published":"2015-06-09","volume":"5","issue":"1","scholar_pub_id":"ynWS968AAAAJ:hFOr9nPyWt4C","scholar_citations":38},{"filename":"Ferrari et al., 2015 GCB.pdf","name":"Ferrari et al., 2015 GCB","year":2015,"url":"https://rummerlab.com/papers/Ferrari%20et%20al.%2C%202015%20GCB.pdf","title":"Interactive effects of ocean acidification and rising sea temperatures alter predation rate and predator selectivity in reef fish communities","authors":["Maud. C. O. Ferrari","Philip L. Munday","Jodie L. Rummer","Mark I. McCormick","Katherine Corkill","Sue-Ann Watson","Bridie J. M. Allan","Mark G. Meekan","Douglas P. Chivers"],"journal":"Global Change Biology","doi":"10.1111/gcb.12818","abstract":"AbstractOcean warming and acidification are serious threats to marine life. While each stressor alone has been studied in detail, their combined effects on the outcome of ecological interactions are poorly understood. We measured predation rates and predator selectivity of two closely related species of damselfish exposed to a predatory dottyback. We found temperature and CO₂ interacted synergistically on overall predation rate, but antagonistically on predator selectivity. Notably, elevated CO₂ or temperature alone reversed predator selectivity, but the interaction between the two stressors cancelled selectivity. Routine metabolic rates of the two prey showed strong species differences in tolerance to CO₂ and not temperature, but these differences did not correlate with recorded mortality. This highlights the difficulty of linking species‐level physiological tolerance to resulting ecological outcomes. This study is the first to document both synergistic and antagonistic effects of elevated CO₂ and temperature on a crucial ecological process like predator–prey dynamics.","published":"2015-05","volume":"21","issue":"5","pages":"1848-1855","scholar_pub_id":"ynWS968AAAAJ:7PzlFSSx8tAC","scholar_citations":112},{"filename":"Rummer and Brauner 2015 PLoS One.pdf","name":"Rummer and Brauner 2015 PLoS One","year":2015,"url":"https://rummerlab.com/papers/Rummer%20and%20Brauner%202015%20PLoS%20One.pdf","title":"Root Effect Haemoglobins in Fish May Greatly Enhance General Oxygen Delivery Relative to Other Vertebrates","authors":["Jodie L. Rummer","Colin J. Brauner"],"journal":"PLOS ONE","doi":"10.1371/journal.pone.0139477","published":"2015-10-05","volume":"10","issue":"10","pages":"e0139477","scholar_pub_id":"ynWS968AAAAJ:R3hNpaxXUhUC","scholar_citations":82},{"filename":"Heinrich et al., 2014 Cons. Physiol..pdf","name":"Heinrich et al., 2014 Cons. Physiol.","year":2014,"url":"https://rummerlab.com/papers/Heinrich%20et%20al.%2C%202014%20Cons.%20Physiol..pdf","title":"A product of its environment: the epaulette shark (<i>Hemiscyllium ocellatum</i>) exhibits physiological tolerance to elevated environmental CO₂","authors":["Dennis D. U. Heinrich","Jodie L. Rummer","Andrea J. Morash","Sue-Ann Watson","Colin A. Simpfendorfer","Michelle R. Heupel","Philip L. Munday"],"journal":"Conservation Physiology","doi":"10.1093/conphys/cou047","volume":"2","scholar_pub_id":"ynWS968AAAAJ:dhFuZR0502QC","scholar_citations":79},{"filename":"Randall, Rummer et al., 2014 JEB.pdf","name":"Randall, Rummer et al., 2014 JEB","year":2014,"url":"https://rummerlab.com/papers/Randall%2C%20Rummer%20et%20al.%2C%202014%20JEB.pdf","title":"A unique mode of tissue oxygenation and the adaptive radiation of teleost fishes","authors":["D. J. Randall","Jodie L. Rummer","J. M. Wilson","S. Wang","C. J. Brauner"],"journal":"Journal of Experimental Biology","doi":"10.1242/jeb.093526","abstract":"Teleost fishes constitute 95% of extant aquatic vertebrates, and we suggest that this is related in part to their unique mode of tissue oxygenation. We propose the following sequence of events in the evolution of their oxygen delivery system. First, loss of plasma-accessible carbonic anhydrase (CA) in the gill and venous circulations slowed the Jacobs–Stewart cycle and the transfer of acid between the plasma and the red blood cells (RBCs). This ameliorated the effects of a generalised acidosis (associated with an increased capacity for burst swimming) on haemoglobin (Hb)–O₂ binding. Because RBC pH was uncoupled from plasma pH, the importance of Hb as a buffer was reduced. The decrease in buffering was mediated by a reduction in the number of histidine residues on the Hb molecule and resulted in enhanced coupling of O₂ and CO₂ transfer through the RBCs. In the absence of plasma CA, nearly all plasma bicarbonate ultimately dehydrated to CO₂ occurred via the RBCs, and chloride/bicarbonate exchange was the rate-limiting step in CO₂ excretion. This pattern of CO₂ excretion across the gills resulted in disequilibrium states for CO₂ hydration/dehydration reactions and thus elevated arterial and venous plasma bicarbonate levels. Plasma-accessible CA embedded in arterial endothelia was retained, which eliminated the localized bicarbonate disequilibrium forming CO₂ that then moved into the RBCs. Consequently, RBC pH decreased which, in conjunction with pH-sensitive Bohr/Root Hbs, elevated arterial oxygen tensions and thus enhanced tissue oxygenation. Counter-current arrangement of capillaries (retia) at the eye and later the swim bladder evolved along with the gas gland at the swim bladder. Both arrangements enhanced and magnified CO₂ and acid production and, therefore, oxygen secretion to those specialised tissues. The evolution of β-adrenergically stimulated RBC Na+/H+ exchange protected gill O₂ uptake during stress and further augmented plasma disequilibrium states for CO₂ hydration/dehydration. Finally, RBC organophosphates (e.g. NTP) could be reduced during hypoxia to further increase Hb–O₂ affinity without compromising tissue O₂ delivery because high-affinity Hbs could still adequately deliver O₂ to the tissues via Bohr/Root shifts. We suggest that the evolution of this unique mode of tissue O₂ transfer evolved in the Triassic/Jurassic Period, when O₂ levels were low, ultimately giving rise to the most extensive adaptive radiation of extant vertebrates, the teleost fishes.","published":"2014-04-15","volume":"217","issue":"8","pages":"1205-1214","scholar_pub_id":"ynWS968AAAAJ:mVmsd5A6BfQC","scholar_citations":79},{"filename":"Killen et al., 2014 Functional Ecology.pdf","name":"Killen et al., 2014 Functional Ecology","year":2014,"url":"https://rummerlab.com/papers/Killen%20et%20al.%2C%202014%20Functional%20Ecology.pdf","title":"Aerobic scope predicts dominance during early life in a tropical damselfish","authors":["Shaun S. Killen","Matthew D. Mitchell","Jodie L. Rummer","Douglas P. Chivers","Maud C. O. Ferrari","Mark G. Meekan","Mark I. McCormick"],"journal":"Functional Ecology","doi":"10.1111/1365-2435.12296","abstract":"Summary\n \n \n \n A range of physiological traits are linked with aggression and dominance within social hierarchies, but the role of individual aerobic capacity in facilitating aggression has seldom been studied. Further, links previously observed between an individual's metabolic rate and aggression level may be context dependent and modulated by factors such as social stress and fcompetitor familiarity.\n \n \n \n We examined these issues in juvenile Ambon damselfish,\n Pomacentrus amboinensis, which display intraspecific competition for territories during settlement on coral reefs.\n \n \n \n Individuals were measured for routine metabolic rate, aerobic scope (AS) and anaerobic capacity using intermittent‐flow respirometry before dyadic dominance contests. Post‐contest, fish were measured for metabolic rate in isolation and while interacting with their previous competitor or a stranger in adjacent transparent respirometers.\n \n \n In arena contests, AS was correlated with aggression and dominance, while routine metabolic rate and anaerobic capacity were not related to dominance. Post‐contest, subordinates showed a rise in metabolic rate and decrease in available AS, presumably due to social stress. Dominants increased metabolic rate in the presence of a previous competitor, possibly due to the stresses of hierarchy maintenance.\n \n \n Metabolic rate during aggressive interactions did not approach that measured during exhaustive exercise, suggesting individuals do not fully utilise their AS during aggression. A greater AS may, however, allow faster post‐contest recovery.\n \n \n These results demonstrate a link between AS and dominance during intraspecific competition for territory. Selection on AS could therefore follow, either indirectly through correlations with other traits influencing resource‐holding potential, or directly if AS carries benefits important for territory acquisition or holding, such as an enhanced capacity to cope with socially induced stress.","published":"2014-12","volume":"28","issue":"6","pages":"1367-1376","scholar_pub_id":"ynWS968AAAAJ:9ZlFYXVOiuMC","scholar_citations":134},{"filename":"Bowden et al., 2014 CBP-A.pdf","name":"Bowden et al., 2014 CBP-A","year":2014,"url":"https://rummerlab.com/papers/Bowden%20et%20al.%2C%202014%20CBP-A.pdf","title":"Alterations in gill structure in tropical reef fishes as a result of elevated temperatures","authors":["A.J. Bowden","N.M. Gardiner","C.S. Couturier","J. A.W. Stecyk","G.E. Nilsson","P.L. Munday","Jodie L. Rummer"],"journal":"Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology","doi":"10.1016/j.cbpa.2014.05.011","published":"2014-09","volume":"175","pages":"64-71","scholar_pub_id":"ynWS968AAAAJ:QIV2ME_5wuYC","scholar_citations":60},{"filename":"Munday et al. 2014 Nature Climate Change copy.pdf","name":"Munday et al. 2014 Nature Climate Change copy","year":2014,"url":"https://rummerlab.com/papers/Munday%20et%20al.%202014%20Nature%20Climate%20Change%20copy.pdf","title":"Behavioural impairment in reef fishes caused by ocean acidification at CO₂ seeps","authors":["Philip L. Munday","Alistair J. Cheal","Danielle L. Dixson","Jodie L. Rummer","Katharina E. Fabricius"],"journal":"Nature Climate Change","doi":"10.1038/NCLIMATE2195","published":"2014-06","volume":"4","issue":"6","pages":"487-492","scholar_pub_id":"ynWS968AAAAJ:Wp0gIr-vW9MC","scholar_citations":230},{"filename":"Rummer et al., 2014 GCB.pdf","name":"Rummer et al., 2014 GCB","year":2014,"url":"https://rummerlab.com/papers/Rummer%20et%20al.%2C%202014%20GCB.pdf","title":"Life on the edge: thermal optima for aerobic scope of equatorial reef fishes are close to current day temperatures","authors":["Jodie L. Rummer","Christine S. Couturier","Jonathan A. W. Stecyk","Naomi M. Gardiner","Jeff P. Kinch","Göran E. Nilsson","Philip L. Munday"],"journal":"Global Change Biology","doi":"10.1111/gcb.12455","abstract":"Abstract\n \n Equatorial populations of marine species are predicted to be most impacted by global warming because they could be adapted to a narrow range of temperatures in their local environment. We investigated the thermal range at which aerobic metabolic performance is optimum in equatorial populations of coral reef fish in northern Papua New Guinea. Four species of damselfishes and two species of cardinal fishes were held for 14 days at 29, 31, 33, and 34 °C, which incorporated their existing thermal range (29–31 °C) as well as projected increases in ocean surface temperatures of up to 3 °C by the end of this century. Resting and maximum oxygen consumption rates were measured for each species at each temperature and used to calculate the thermal reaction norm of aerobic scope. Our results indicate that one of the six species,\n Chromis atripectoralis, is already living above its thermal optimum of 29 °C. The other five species appeared to be living close to their thermal optima (ca. 31 °C). Aerobic scope was significantly reduced in all species, and approached zero for two species at 3 °C above current‐day temperatures. One species was unable to survive even short‐term exposure to 34 °C. Our results indicate that low‐latitude reef fish populations are living close to their thermal optima and may be more sensitive to ocean warming than higher‐latitude populations. Even relatively small temperature increases (2–3 °C) could result in population declines and potentially redistribution of equatorial species to higher latitudes if adaptation cannot keep pace.","published":"2014-04","volume":"20","issue":"4","pages":"1055-1066","scholar_pub_id":"ynWS968AAAAJ:4DMP91E08xMC","scholar_citations":284},{"filename":"McLeod et al., 2013 Cons. Physiol.pdf","name":"McLeod et al., 2013 Cons. Physiol","year":2013,"url":"https://rummerlab.com/papers/McLeod%20et%20al.%2C%202013%20Cons.%20Physiol.pdf","title":"Climate change and the performance of larval coral reef fishes: the interaction between temperature and food availability","authors":["I. M. McLeod","Jodie L. Rummer","T. D. Clark","G. P. Jones","M. I. McCormick","A. S. Wenger","P. L. Munday"],"journal":"Conservation Physiology","doi":"10.1093/conphys/cot024","published":"2013-10-01","volume":"1","issue":"1","pages":"cot024-cot024","scholar_pub_id":"ynWS968AAAAJ:M3ejUd6NZC8C","scholar_citations":104},{"filename":"Rummer et al., 2013 Cons. Physiol..pdf","name":"Rummer et al., 2013 Cons. Physiol.","year":2013,"url":"https://rummerlab.com/papers/Rummer%20et%20al.%2C%202013%20Cons.%20Physiol..pdf","title":"Elevated CO₂ enhances aerobic scope of a coral reef fish","authors":["Jodie L. Rummer","J. A. W. Stecyk","C. S. Couturier","S.-A. Watson","G. E. Nilsson","P. L. Munday"],"journal":"Conservation Physiology","doi":"10.1093/conphys/cot023","published":"2013-09-23","volume":"1","issue":"1","pages":"cot023-cot023","scholar_pub_id":"ynWS968AAAAJ:4TOpqqG69KYC","scholar_citations":109},{"filename":"Roche et al., 2013 JEB.pdf","name":"Roche et al., 2013 JEB","year":2013,"url":"https://rummerlab.com/papers/Roche%20et%20al.%2C%202013%20JEB.pdf","title":"Finding the best estimates of metabolic rates in a coral reef fish","authors":["Dominique G. Roche","Sandra A. Binning","Yoland Bosiger","Jacob L. Johansen","Jodie L. Rummer"],"journal":"Journal of Experimental Biology","doi":"10.1242/jeb.082925","abstract":"Summary\n Metabolic rates of aquatic organisms are estimated from measurements of oxygen consumption rates (ṀO2) through swimming and resting respirometry. These distinct approaches are increasingly used in eco- and conservation physiology studies; however, few studies have tested whether they yield comparable results. We examined whether two fundamental ṀO2 measures, standard metabolic rate (SMR) and maximum metabolic rate (MMR), vary based on the method employed. Ten bridled monocle bream (Scolopsis bilineatus) were exercised using (1) a critical swimming speed (Ucrit) protocol, (2) a 15 min exhaustive chase protocol and (3) a 3 min exhaustive chase protocol followed by brief air exposure. Protocol (1) was performed in a swimming respirometer whereas protocols (2) and (3) were followed by resting respirometry. SMR estimates in swimming respirometry were similar to those in resting respirometry when a three-parameter exponential or power function was used to extrapolate the swimming speed-ṀO2 relationship to zero swimming speed. In contrast, MMR using the Ucrit protocol was 36% higher than MMR derived from the 15 min chase protocol and 23% higher than MMR using the 3 min chase 1 min air exposure protocol. For strong steady (endurance) swimmers, such as S. bilineatus, swimming respirometry can produce more accurate MMR estimates than exhaustive chase protocols because oxygen consumption is measured during exertion. However, when swimming respirometry is impractical, exhaustive chase protocols should be supplemented with brief air exposure to improve measurement accuracy. Caution is warranted when comparing MMR estimates obtained with different respirometry methods unless they are cross-validated on a species-specific basis.","published":"2013-01-01","scholar_pub_id":"ynWS968AAAAJ:MXK_kJrjxJIC","scholar_citations":218},{"filename":"Rummer et al., 2014 JEB.pdf","name":"Rummer et al., 2014 JEB","year":2013,"url":"https://rummerlab.com/papers/Rummer%20et%20al.%2C%202014%20JEB.pdf","title":"Function and control of the fish secondary vascular system, a contrast to mammalian lymphatic systems","authors":["Jodie L. Rummer","Shuhong Wang","John F. Steffensen","David J. Randall"],"journal":"Journal of Experimental Biology","doi":"10.1242/jeb.086348","abstract":"Summary\n Teleost fishes and mammalian lineages diverged 400 million years ago, and environmental requirements (water vs. air) have resulted in marked differences in cardiovascular function between fish and mammals. Suggestions that the fish secondary vascular system (SVS) could be used as a model for the mammalian lymphatic system should be taken with caution. Despite molecular markers indicating similar genetic origin, functions of the SVS in teleost fish are probably different from those of the mammalian lymphatic system. We determined that, in resting glass catfish, (Kryptopterus bicirrhis), plasma moves from the primary vascular system (PVS) to the SVS through small connecting vessels less than 10 μm in diameter, smaller than the red blood cells (RBCs). During and following hypoxia or exercise, flow increases, and RBCs enter the SVS, possibly via β-adrenoreceptor-mediated dilation of the connecting vessels. The volume of the SVS can be large and, as RBCs flow into the SVS, the haematocrit of the PVS falls by as much as 50% of the resting value. Possible functions of the SVS, including skin respiration, ionic and osmotic buffering, and reductions in heart work and RBC turnover, are discussed.","published":"2013-01-01","scholar_pub_id":"ynWS968AAAAJ:qxL8FJ1GzNcC","scholar_citations":47},{"filename":"Collins et al., 2013.pdf","name":"Collins et al., 2013","year":2013,"url":"https://rummerlab.com/papers/Collins%20et%20al.%2C%202013.pdf","title":"Hypoxia tolerance is conserved across genetically distinct sub-populations of an iconic, tropical Australian teleost (<i>Lates calcarifer</i>)","authors":["G. M. Collins","T. D. Clark","Jodie L. Rummer","A. G. Carton"],"journal":"Conservation Physiology","doi":"10.1093/conphys/cot029","published":"2013-11-11","volume":"1","issue":"1","pages":"cot029-cot029","scholar_pub_id":"ynWS968AAAAJ:aqlVkmm33-oC","scholar_citations":52},{"filename":"Dabruzzi et al., 2013.pdf","name":"Dabruzzi et al., 2013","year":2013,"url":"https://rummerlab.com/papers/Dabruzzi%20et%20al.%2C%202013.pdf","title":"Juvenile Ribbontail Stingray, <i>Taeniura lymma</i> (Forsskål, 1775) (Chondrichthyes, Dasyatidae), demonstrate a unique suite of physiological adaptations to survive hyperthermic nursery conditions","authors":["Theresa F. Dabruzzi","Wayne A. Bennett","Jodie L. Rummer","Nann A. Fangue"],"journal":"Hydrobiologia","doi":"10.1007/s10750-012-1249-z","published":"2013-01","volume":"701","issue":"1","pages":"37-49","scholar_pub_id":"ynWS968AAAAJ:W7OEmFMy1HYC","scholar_citations":61},{"filename":"Rummer et al., 2013 Science.pdf","name":"Rummer et al., 2013 Science","year":2013,"url":"https://rummerlab.com/papers/Rummer%20et%20al.%2C%202013%20Science.pdf","title":"Root Effect Hemoglobin May Have Evolved to Enhance General Tissue Oxygen Delivery","authors":["Jodie L. Rummer","David J. McKenzie","Alessio Innocenti","Claudiu T. Supuran","Colin J. Brauner"],"journal":"Science","doi":"10.1126/science.1233692","abstract":"Holding Your Breath\n \n Hemoglobin and myoglobin are widely responsible for oxygen transport and storage (see the Perspective by\n \n Rezende\n \n ). The ability of diving mammals to obtain enough oxygen to support extended dives and foraging is largely dependent on muscle myoglobin (Mb) content.\n \n Mirceta\n et al.\n \n (p.\n 1303\n ) found that in mammalian lineages with an aquatic or semiaquatic lifestyle, Mb net charge increases, which may represent an adaptation to inhibit self-association of Mb at high intracellular concentrations. Epistasis results from nonadditive genetic interactions and can affect phenotypic evolution.\n \n Natarajan\n et al.\n \n (p.\n 1324\n ) found that epistatic interactions were able to explain the increased hemoglobin oxygen-binding affinity observed in deer mice populations at high altitude. In mammals, the offloading of oxygen from hemoglobin is facilitated by a reduction in the blood's pH, driven by metabolically produced CO₂. However, in fish, a reduction in blood pH reduces oxygen carrying capacity of hemoglobin.\n \n Rummer\n et al.\n \n (p.\n 1327\n ) implanted fiber optic oxygen sensors within the muscles of rainbow trout and found that elevated CO₂\n levels in the water led to acidosis and elevated oxygen tensions.","published":"2013-06-14","volume":"340","issue":"6138","pages":"1327-1329","scholar_pub_id":"ynWS968AAAAJ:ULOm3_A8WrAC","scholar_citations":161},{"filename":"Couturier et al., 2013.pdf","name":"Couturier et al., 2013","year":2013,"url":"https://rummerlab.com/papers/Couturier%20et%20al.%2C%202013.pdf","title":"Species-specific effects of near-future CO₂ on the respiratory performance of two tropical prey fish and their predator","authors":["Christine S. Couturier","Jonathan A.W. Stecyk","Jodie L. Rummer","Philip L. Munday","Göran E. Nilsson"],"journal":"Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology","doi":"10.1016/j.cbpa.2013.07.025","published":"2013-11","volume":"166","issue":"3","pages":"482-489","scholar_pub_id":"ynWS968AAAAJ:_kc_bZDykSQC","scholar_citations":104},{"filename":"Brauner and Rummer, 2011.pdf","name":"Brauner and Rummer, 2011","year":2011,"url":"https://rummerlab.com/papers/Brauner%20and%20Rummer%2C%202011.pdf","title":"Gas Transport and Exchange: Interaction Between O₂ and CO₂ Exchange","authors":["Colin J. Brauner","Jodie L. Rummer"],"book":"Encyclopedia of Fish Physiology: From Genome to Environment","doi":"10.1016/B978-0-12-374553-8.00115-5","scholar_pub_id":"ynWS968AAAAJ:k_IJM867U9cC","scholar_citations":8},{"filename":"Rummer and Brauner, 2011.pdf","name":"Rummer and Brauner, 2011","year":2011,"url":"https://rummerlab.com/papers/Rummer%20and%20Brauner%2C%202011.pdf","title":"Plasma-accessible carbonic anhydrase at the tissue of a teleost fish may greatly enhance oxygen delivery:<i>in vitro</i>evidence in rainbow trout,<i>Oncorhynchus mykiss</i>","authors":["Jodie L. Rummer","Colin J. Brauner"],"journal":"Journal of Experimental Biology","doi":"10.1242/jeb.054049","abstract":"SUMMARYDuring a generalized acidosis in rainbow trout, catecholamines are released into the blood, activating red blood cell (RBC) Na+/H+ exchange (βNHE), thus protecting RBC intracellular pH (pHi) and subsequent O₂ binding at the gill. Because of the presence of a Root effect (a reduction in oxygen carrying capacity of the blood with a reduction in pH), the latter could otherwise be impaired. However, plasma-accessible carbonic anhydrase (CA) at the tissues (and absence at the gills) may result in selective short-circuiting of RBC βNHE pH regulation. This would acidify the RBCs and greatly enhance O₂ delivery by exploitation of the combined Bohr-Root effect, a mechanism not previously proposed. As proof-of-principle, an in vitro closed system was developed to continuously monitor extracellular pH (pHe) and O₂ tension (PO₂) of rainbow trout blood. In this closed system, adding CA to acidified, adrenergically stimulated RBCs short-circuited βNHE pH regulation, resulting in an increase in PO₂ by &gt;30 mmHg, depending on the starting Hb-O₂ saturation and degree of initial acidification. Interestingly, in the absence of adrenergic stimulation, addition of CA still elevated PO₂, albeit to a lesser extent, a response that was absent during general NHE inhibition. If plasma-accessible CA-mediated short-circuiting is operational in vivo, the combined Bohr-Root effect system unique to teleost fishes could markedly enhance tissue O₂ delivery far in excess of that in vertebrates possessing a Bohr effect alone and may lead to insights about the early evolution of the Root effect.","published":"2011-07-15","volume":"214","issue":"14","pages":"2319-2328","scholar_pub_id":"ynWS968AAAAJ:Tyk-4Ss8FVUC","scholar_citations":70},{"filename":"Clark et al. 2009.pdf","name":"Clark et al. 2009","year":2010,"url":"https://rummerlab.com/papers/Clark%20et%20al.%202009.pdf","title":"Reduced and reversed temperature dependence of blood oxygenation in an ectothermic scombrid fish: implications for the evolution of regional heterothermy?","authors":["Timothy Darren Clark","Jodie L. Rummer","C. A. Sepulveda","A. P. Farrell","C. J. Brauner"],"journal":"Journal of Comparative Physiology B","doi":"10.1007/s00360-009-0388-7","published":"2010-01","volume":"180","issue":"1","pages":"73-82","scholar_pub_id":"ynWS968AAAAJ:IjCSPb-OGe4C","scholar_citations":23},{"filename":"Rummer et al., 2010.pdf","name":"Rummer et al., 2010","year":2010,"url":"https://rummerlab.com/papers/Rummer%20et%20al.%2C%202010.pdf","title":"Use it or lose it? Sablefish,<i>Anoplopoma fimbria</i>, a species representing a fifth teleostean group where the βNHE associated with the red blood cell adrenergic stress response has been secondarily lost","authors":["Jodie L. Rummer","Mani Roshan-Moniri","Shannon K. Balfry","Colin J. Brauner"],"journal":"Journal of Experimental Biology","doi":"10.1242/jeb.038844","abstract":"SUMMARYLike most teleosts, sablefish (Anoplopoma fimbria Pallas 1814) blood exhibits a moderate Root effect (~35% maximal desaturation), where a reduction in blood pH dramatically reduces O₂ carrying capacity, a mechanism important for oxygenating the eye and filling the swim bladder (SB) in teleosts. Although sablefish lack a SB, we observed a well-defined choroid rete at the eye. The adrenergically mediated cell swelling typically associated with a functional red blood cell (RBC) β-adrenergic Na+/H+ exchanger (βNHE), which would normally protect RBC pH, and thus O₂ transport, during a generalized acidosis, was not observed in sablefish blood. Neither isoproterenol (a β-agonist) nor 8-bromo cAMP could elicit this response. Furthermore, RBC osmotic shrinkage, known to stimulate NHEs in general and βNHE in other teleosts such as trout and flounder, resulted in no significant regulatory volume increase (RVI), further supporting the absence of a functional RBC βNHE. The onset of the Root effect occurs at a much lower RBC pH (6.83–6.92) than in other teleosts, and thus RBC βNHE may not be required to protect O₂ transport during a generalized acidosis in vivo. Phylogenetically, sablefish may represent a fifth group of teleosts exhibiting a secondary reduction or loss of βNHE activity. However, sablefish have not lost the choroid rete at the eye (unlike in the other four groups), which may still function with the Root effect to oxygenate the retina, but the low pH onset of the Root effect may ensure haemoglobin (Hb)-O₂ binding is not compromised at the respiratory surface during a general acidosis in the absence of RBC βNHE. The sablefish may represent an anomaly within the framework of Root effect evolution, in that they possess a moderate Root effect and a choroid rete at the eye, but lack the RBC βNHE and the SB system.","published":"2010-05-01","volume":"213","issue":"9","pages":"1503-1512","scholar_pub_id":"ynWS968AAAAJ:zYLM7Y9cAGgC","scholar_citations":29},{"filename":"Rummer et al. 2009.pdf","name":"Rummer et al. 2009","year":2009,"url":"https://rummerlab.com/papers/Rummer%20et%20al.%202009.pdf","title":"Physiological tolerance to hyperthermia and hypoxia and effects on species richness and distribution of rockpool fishes of Loggerhead Key, Dry Tortugas National Park","authors":["Jodie L. Rummer","N.A. Fangue","H.L. Jordan","B.N. Tiffany","K.J. Blansit","S. Galleher","A. Kirkpatrick","A.A. Kizlauskas","C.M. Pomory","W.A. Bennett"],"journal":"Journal of Experimental Marine Biology and Ecology","doi":"10.1016/j.jembe.2009.01.015","published":"2009-04","volume":"371","issue":"2","pages":"155-162","scholar_pub_id":"ynWS968AAAAJ:Y0pCki6q_DkC","scholar_citations":23},{"filename":"Caldwell, Rummer, and Brauner 2006.pdf","name":"Caldwell, Rummer, and Brauner 2006","year":2006,"url":"https://rummerlab.com/papers/Caldwell%2C%20Rummer%2C%20and%20Brauner%202006.pdf","title":"Blood sampling techniques and storage duration: Effects on the presence and magnitude of the red blood cell β-adrenergic response in rainbow trout (<i>Oncorhynchus mykiss</i>)","authors":["Susan Caldwell","Jodie L. Rummer","Colin J. Brauner"],"journal":"Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology","doi":"10.1016/j.cbpa.2006.02.029","published":"2006-06","volume":"144","issue":"2","pages":"188-195","scholar_pub_id":"ynWS968AAAAJ:9yKSN-GCB0IC","scholar_citations":39},{"filename":"Lai, Kakuta, Mok, Rummer, and Randall 2006.pdf","name":"Lai, Kakuta, Mok, Rummer, and Randall 2006","year":2006,"url":"https://rummerlab.com/papers/Lai%2C%20Kakuta%2C%20Mok%2C%20Rummer%2C%20and%20Randall%202006.pdf","title":"Effects of moderate and substantial hypoxia on erythropoietin levels in rainbow trout kidney and spleen","authors":["Jimmy C. C. Lai","Izuru Kakuta","Helen O. L. Mok","Jodie L. Rummer","David Randall"],"journal":"Journal of Experimental Biology","doi":"10.1242/jeb.02279","abstract":"SUMMARY\n Erythropoietin (EPO) is a glycoprotein hormone that regulates the proliferation and differentiation of erythroid progenitor cells in mammals. Although EPO has been identified in fish, the specific function and effects of hypoxia have not been investigated previously. In this study, we have demonstrated a relationship between increases in renal EPO levels and decreases in spleen EPO levels and spleen-somatic index (SSI), with increases in haemoglobin (Hb) concentration in the blood during hypoxia exposure in rainbow trout. Splenic contraction and the subsequent red blood cell release accounts for the initial increase in Hb concentration in the blood, whereas EPO action probably accounts for the later increases in hemoglobin concentration in the blood. Our data indicate that fish and mammalian erythropoietic systems are similar in response to hypoxia, in that erythropoiesis in fish is influenced by EPO.","published":"2006-07-15","volume":"209","issue":"14","pages":"2734-2738","scholar_pub_id":"ynWS968AAAAJ:u-x6o8ySG0sC","scholar_citations":179},{"filename":"Rummer and Bennett 2005.pdf","name":"Rummer and Bennett 2005","year":2005,"url":"https://rummerlab.com/papers/Rummer%20and%20Bennett%202005.pdf","title":"Physiological Effects of Swim Bladder Overexpansion and Catastrophic Decompression on Red Snapper","authors":["Jodie L. Rummer","Wayne A. Bennett"],"journal":"Transactions of the American Fisheries Society","doi":"10.1577/T04-235.1","abstract":"AbstractThe commercial and recreational harvests of red snapper Lutjanus campechanus in the Gulf of Mexico have declined over the past five decades, prompting strict regulations. Release mortality associated with catastrophic decompression (CD) is a possible cause for the continuing decline, although to date no physiological data exist to support this assumption. Using a flow‐through high‐pressure chamber, subadult red snapper were acclimated to 101.2, 405.3, 608.0, and 1,215.9 kPa, simulating depths typical of their distribution (as deep as 200 m), and then decompressed at a rate of 10.1 kPa/s. Lateral and dorsal X‐ray imaging in combination with necropsy showed that swim bladders expanded in a predictable manner. Ventral expansion into the caudal body cavity space occurred at lower pressures, whereas expansion into the cranial portion of the body cavity occurred at the highest pressure. Expansion patterns resulted in over 70 different overexpansion injuries, the most severe being to vital organs. Our results suggest a specific suite of clearly identifiable injuries associated with CD that increase in number and severity as retrieval depth increases. A more thorough understanding of catastrophic decompression syndrome will provide insight into the declining fishery and aid in developing effective physiology‐based management strategies.","published":"2005-11","volume":"134","issue":"6","pages":"1457-1470","scholar_pub_id":"ynWS968AAAAJ:u5HHmVD_uO8C","scholar_citations":208},{"filename":"Fangue, Flaherty, Rummer et al. 2001.pdf","name":"Fangue, Flaherty, Rummer et al. 2001","year":2001,"url":"https://rummerlab.com/papers/Fangue%2C%20Flaherty%2C%20Rummer%20et%20al.%202001.pdf","title":"Temperature and hypoxia tolerance of selected fishes from a hyperthermal rockpool in the Dry Tortugas, with notes on diversity and behavior","authors":["Nann A. Fangue","C. E. Flaherty","Jodie L. Rummer"],"journal":"Florida Scientist","volume":"64","issue":"1-2","scholar_pub_id":"ynWS968AAAAJ:2osOgNQ5qMEC","scholar_citations":28}]}