Conservation Physiology最新文献

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The heat is on: sensitivity of goldsinny wrasse to global climate change. 热浪滚滚:金濑鱼对全球气候变化的敏感性。
IF 2.6 3区 环境科学与生态学
Conservation Physiology Pub Date : 2024-10-08 eCollection Date: 2024-01-01 DOI: 10.1093/conphys/coae068
Diana Perry, Elena Tamarit, Daniel Morgenroth, Albin Gräns, Joachim Sturve, Martin Gullström, Peter Thor, Håkan Wennhage
{"title":"The heat is on: sensitivity of goldsinny wrasse to global climate change.","authors":"Diana Perry, Elena Tamarit, Daniel Morgenroth, Albin Gräns, Joachim Sturve, Martin Gullström, Peter Thor, Håkan Wennhage","doi":"10.1093/conphys/coae068","DOIUrl":"https://doi.org/10.1093/conphys/coae068","url":null,"abstract":"<p><p>Unsustainable harvesting practices have drastically reduced fish populations globally and developments in aquaculture have increased. Unexpectedly, Atlantic salmon farming caused the opening of a new fishery in northern European countries, where previously unharvested mesopredatory species, like the goldsinny wrasse (<i>Ctenolabrus rupestris</i>), are captured for use as cleaner fish in pens along the coast and fjords. The goldsinny wrasse is widespread in coastal areas where it plays an ecologically important role as a predator of small invertebrates. Since climate change effects are particularly pronounced in coastal waters, it becomes urgent to understand how fish like the goldsinny will respond to global climate change, including the increasing frequency and intensity of marine heatwaves (MHWs), ocean freshening (OF) and ocean acidification (OA). To address this, we conducted a multi-stressor experiment exposing adult goldsinny to each stressor individually, as well as to all three combined. The results indicated that the goldsinny is highly affected by MHWs and extremely sensitive to a multi-stressor environment, with 34% and 53% mortality, respectively. Additionally, exposure to a MHW event, OF and multi-stressor conditions affected fish metabolism, with the highest standard metabolic- and maximum metabolic-oxygen consumption rates observed for the MHW treatment. Increases in oxidized glutathione (GSSG) and percent oxidized glutathione (% GSSG) in the livers, indicative of oxidative stress, were also seen in the MHW, OF and multi-stressor treatments. As a single stressor, OA showed no significant impacts on the measured parameters. This information is important for conservation of coastal marine environments, given the species' important role in shallow-water habitats and for management of goldsinny or other mesopredatory fish harvested in coastal ecosystems. The sensitivity of the goldsinny wrasse to future stressors is of concern, and any potential reductions in abundance as a result of climate change may lead to cascade effects with ecosystem-wide consequences.</p>","PeriodicalId":54331,"journal":{"name":"Conservation Physiology","volume":"12 1","pages":"coae068"},"PeriodicalIF":2.6,"publicationDate":"2024-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11459238/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142395289","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Data needs for sea otter bioenergetics modeling. 海獭生物能模型的数据需求。
IF 2.6 3区 环境科学与生态学
Conservation Physiology Pub Date : 2024-10-08 eCollection Date: 2024-01-01 DOI: 10.1093/conphys/coae067
Blaine D Griffen, Lexanne Klimes, Laura S Fletcher, Nicole M Thometz
{"title":"Data needs for sea otter bioenergetics modeling.","authors":"Blaine D Griffen, Lexanne Klimes, Laura S Fletcher, Nicole M Thometz","doi":"10.1093/conphys/coae067","DOIUrl":"10.1093/conphys/coae067","url":null,"abstract":"<p><p>Sea otters are keystone predators whose recovery and expansion from historical exploitation throughout their range can serve to enhance local biodiversity, promote community stability, and buffer against habitat loss in nearshore marine systems. Bioenergetics models have become a useful tool in conservation and management efforts of marine mammals generally, yet no bioenergetics model exists for sea otters. Previous research provides abundant data that can be used to develop bioenergetics models for this species, yet important data gaps remain. Here we review the available data that could inform a bioenergetics model, and point to specific open questions that could be answered to more fully inform such an effort. These data gaps include quantifying energy intake through foraging by females with different aged pups in different quality habitats, the influence of body size on energy intake through foraging, and determining the level of fat storage that is possible in sea otters of different body sizes. The more completely we fill these data gaps, the more confidence we can have in the results and predictions produced by future bioenergetics modeling efforts for this species.</p>","PeriodicalId":54331,"journal":{"name":"Conservation Physiology","volume":"12 1","pages":"coae067"},"PeriodicalIF":2.6,"publicationDate":"2024-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11465142/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142401960","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Could future ocean acidification be affecting the energy budgets of marine fish? 未来海洋酸化是否会影响海洋鱼类的能量预算?
IF 2.6 3区 环境科学与生态学
Conservation Physiology Pub Date : 2024-10-08 eCollection Date: 2024-01-01 DOI: 10.1093/conphys/coae069
Gwangseok R Yoon, Arsheen Bozai, Cosima S Porteus
{"title":"Could future ocean acidification be affecting the energy budgets of marine fish?","authors":"Gwangseok R Yoon, Arsheen Bozai, Cosima S Porteus","doi":"10.1093/conphys/coae069","DOIUrl":"https://doi.org/10.1093/conphys/coae069","url":null,"abstract":"<p><p>With the unprecedented environmental changes caused by climate change including ocean acidification, it has become crucial to understand the responses and adaptive capacity of fish to better predict directional changes in the ecological landscape of the future. We conducted a systematic literature review to examine if simulated ocean acidification (sOA) could influence growth and reproduction in fish within the dynamic energy budget theory framework. As such, we chose to examine metabolic rate, locomotion, food assimilation and growth in early life stages (i.e. larvae and juvenile) and adults. Our goal was to evaluate if acclimatization to sOA has any directional changes in these traits and to explore potential implications for energetic trade-offs in these for growth and reproduction. We found that sOA had negligible effects on energetic expenditure for maintenance and aerobic metabolism due to the robust physiological capacity regulating acid-base and ion perturbations but substantive effects on locomotion, food assimilation and growth. We demonstrated evidence that sOA significantly reduced growth performance of fish in early life stages, which may have resulted from reduced food intake and digestion efficiency. Also, our results showed that sOA may enhance reproduction with increased numbers of offspring although this may come at the cost of altered reproductive behaviours or offspring fitness. While these results indicate evidence for changes in energy budgets because of physiological acclimatization to sOA, the heterogeneity of results in the literature suggests that physiological and neural mechanisms need to be clearly elucidated in future studies. Lastly, most studies on sOA have been conducted on early life stages, which necessitates that more studies should be conducted on adults to understand reproductive success and thus better predict cohort and population dynamics under ongoing climate change.</p>","PeriodicalId":54331,"journal":{"name":"Conservation Physiology","volume":"12 1","pages":"coae069"},"PeriodicalIF":2.6,"publicationDate":"2024-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11459383/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142395288","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Health assessment of nesting loggerhead sea turtles (Caretta caretta) in one of their largest rookeries (central eastern Florida coast, USA). 在蠵龟(Caretta caretta)最大的筑巢地之一(美国佛罗里达州东部海岸中部)对筑巢的蠵龟进行健康评估。
IF 2.6 3区 环境科学与生态学
Conservation Physiology Pub Date : 2024-09-20 eCollection Date: 2024-01-01 DOI: 10.1093/conphys/coae064
Nicole I Stacy, Rachel Smith, Kathleen E Sullivan, Steven E Nelson, Elizabeth C Nolan, Ryan S De Voe, Blair E Witherington, Justin R Perrault
{"title":"Health assessment of nesting loggerhead sea turtles (<i>Caretta caretta</i>) in one of their largest rookeries (central eastern Florida coast, USA).","authors":"Nicole I Stacy, Rachel Smith, Kathleen E Sullivan, Steven E Nelson, Elizabeth C Nolan, Ryan S De Voe, Blair E Witherington, Justin R Perrault","doi":"10.1093/conphys/coae064","DOIUrl":"10.1093/conphys/coae064","url":null,"abstract":"<p><p>Reproduction is a physiologically demanding process for sea turtles. Health indicators, including morphometric indices and blood analytes, provide insight into overall health, physiology and organ function for breeding sea turtles as a way to assess population-level effects. The Archie Carr National Wildlife Refuge (ACNWR) on Florida's central eastern coast is critical nesting habitat for loggerhead sea turtles (<i>Caretta caretta</i>), but health variables from this location have not been documented. Objectives of the study were to (1) assess morphometrics and blood analyte data (including haematology, plasma biochemistry, protein electrophoresis, β-hydroxybutyrate, trace nutrients, vitamins and fatty acid profiles) from loggerheads nesting on or near the beaches of the ACNWR, (2) investigate correlations of body condition index (BCI) with blood analytes and (3) analyse temporal trends in morphometric and blood analyte data throughout the nesting season. Morphometric and/or blood analyte data are reported for 57 nesting loggerheads encountered between 2016 and 2019. Plasma copper and iron positively correlated with BCI. Mass tended to decline across nesting season, whereas BCI did not. Many blood analytes significantly increased or decreased across nesting season, reflecting the catabolic state and haemodynamic variations of nesting turtles. Twenty-three of 34 fatty acids declined across nesting season, which demonstrates the physiological demands of nesting turtles for vitellogenesis and reproductive activities, thus suggesting potential utility of fatty acids for the assessment of foraging status and phases of reproduction. The findings herein are relevant for future spatiotemporal and interspecies comparisons, investigating stressor effects and understanding the physiological demands in nesting sea turtles. This information provides comparative data for individual animals in rescue or managed care settings and for assessment of conservation strategies.</p>","PeriodicalId":54331,"journal":{"name":"Conservation Physiology","volume":"12 1","pages":"coae064"},"PeriodicalIF":2.6,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11415931/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142300904","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Cortisol in fish scales remains stable during extended periods of storage. 鱼鳞中的皮质醇在长期储存期间保持稳定。
IF 2.6 3区 环境科学与生态学
Conservation Physiology Pub Date : 2024-09-19 eCollection Date: 2024-01-01 DOI: 10.1093/conphys/coae065
Christina O'Toole, Philip White, Conor T Graham, Caitlin Conroy, Deirdre Brophy
{"title":"Cortisol in fish scales remains stable during extended periods of storage.","authors":"Christina O'Toole, Philip White, Conor T Graham, Caitlin Conroy, Deirdre Brophy","doi":"10.1093/conphys/coae065","DOIUrl":"10.1093/conphys/coae065","url":null,"abstract":"<p><p>Measurement of cortisol in fish scales is attracting considerable attention as a non-invasive indicator of chronic stress in wild populations. For many fish species of management and conservation interest, extensive scale collections exist that could provide extended records of individual stress responses, by combining cortisol measurements with life history information. However, it is not yet known how well cortisol is preserved in the scale during storage. To investigate the stability of scale cortisol, we accelerated potential degradation by storing scales from an individual farmed Atlantic salmon (<i>Salmo salar</i>) in an oven at 50°C for between 2 and 12 weeks. We found no significant relationship between scale cortisol concentration and either storage time or storage temperature. Cortisol concentrations in scales from the same fish were consistent (18.54-21.82 ng. g<sup>-1</sup>; coefficient of variation (CV) = 3.6%), indicating that scale cortisol can be reliably quantified, even in scales stored for varying periods of time or under different conditions. We also examined the effects of storage in real time using Atlantic salmon scales that were stored in paper envelopes at room temperature for between 3 and 32 years and found no significant relationship between scale cortisol concentration and storage time. Scale cortisol concentrations ranged from 4.05 to 135.37 ng.g<sup>-1</sup> and levels of between-individual variability were high (CV = 61%). Given that scale cortisol does not degrade during long-term storage, historical scale collections and associated data describing fish life histories could potentially be used to develop bioindicators of physiological responses in fish populations. Further research is needed to understand scale cortisol variability and its biological relevance.</p>","PeriodicalId":54331,"journal":{"name":"Conservation Physiology","volume":"12 1","pages":"coae065"},"PeriodicalIF":2.6,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11413646/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142300903","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
An evolving roadmap: using mitochondrial physiology to help guide conservation efforts. 不断发展的路线图:利用线粒体生理学帮助指导保护工作。
IF 2.7 3区 环境科学与生态学
Conservation Physiology Pub Date : 2024-09-07 DOI: 10.1093/conphys/coae063
Elisa Thoral,Neal J Dawson,Stefano Bettinazzi,Enrique Rodríguez
{"title":"An evolving roadmap: using mitochondrial physiology to help guide conservation efforts.","authors":"Elisa Thoral,Neal J Dawson,Stefano Bettinazzi,Enrique Rodríguez","doi":"10.1093/conphys/coae063","DOIUrl":"https://doi.org/10.1093/conphys/coae063","url":null,"abstract":"The crucial role of aerobic energy production in sustaining eukaryotic life positions mitochondrial processes as key determinants of an animal's ability to withstand unpredictable environments. The advent of new techniques facilitating the measurement of mitochondrial function offers an increasingly promising tool for conservation approaches. Herein, we synthesize the current knowledge on the links between mitochondrial bioenergetics, ecophysiology and local adaptation, expanding them to the wider conservation physiology field. We discuss recent findings linking cellular bioenergetics to whole-animal fitness, in the current context of climate change. We summarize topics, questions, methods, pitfalls and caveats to help provide a comprehensive roadmap for studying mitochondria from a conservation perspective. Our overall aim is to help guide conservation in natural populations, outlining the methods and techniques that could be most useful to assess mitochondrial function in the field.","PeriodicalId":54331,"journal":{"name":"Conservation Physiology","volume":"59 1","pages":"coae063"},"PeriodicalIF":2.7,"publicationDate":"2024-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142205146","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Moving beyond the mean: an analysis of faecal corticosterone metabolites shows substantial variability both within and across white-tailed deer populations. 超越平均值:对粪便皮质酮代谢物的分析表明,白尾鹿种群内部和种群之间都存在巨大差异。
IF 2.7 3区 环境科学与生态学
Conservation Physiology Pub Date : 2024-09-07 DOI: 10.1093/conphys/coae062
Nicholas M Sutton,Cory Suski,Keegan Payne,James P O'Dwyer
{"title":"Moving beyond the mean: an analysis of faecal corticosterone metabolites shows substantial variability both within and across white-tailed deer populations.","authors":"Nicholas M Sutton,Cory Suski,Keegan Payne,James P O'Dwyer","doi":"10.1093/conphys/coae062","DOIUrl":"https://doi.org/10.1093/conphys/coae062","url":null,"abstract":"Glucocorticoid (GC) levels have significant impacts on the health and behaviour of wildlife populations and are involved in many essential body functions including circadian rhythm, stress physiology and metabolism. However, studies of GCs in wildlife often focus on estimating mean hormone levels in populations, or a subset of a population, rather than on assessing the entire distribution of hormone levels within populations. Additionally, explorations of population GC data are limited due to the tradeoff between the number of individuals included in studies and the amount of data per individual that can be collected. In this study, we explore patterns of GC level distributions in three white-tailed deer (Odocoileus virginianus) populations using a non-invasive, opportunistic sampling approach. GC levels were assessed by measuring faecal corticosterone metabolite levels ('fCMs') from deer faecal samples throughout the year. We found both population and seasonal differences in fCMs but observed similarly shaped fCM distributions in all populations. Specifically, all population fCM cumulative distributions were found to be very heavy-tailed. We developed two toy models of acute corticosterone elevation in an effort to recreate the observed heavy-tailed distributions. We found that, in all three populations, cumulative fCM distributions were better described by an assumption of large, periodic spikes in corticosterone levels every few days, as opposed to an assumption of random spikes in corticosterone levels. The analyses presented in this study demonstrate the potential for exploring population-level patterns of GC levels from random, opportunistically sampled data. When taken together with individual-focused studies of GC levels, such analyses can improve our understanding of how individual hormone production scales up to population-level patterns.","PeriodicalId":54331,"journal":{"name":"Conservation Physiology","volume":"410 1","pages":"coae062"},"PeriodicalIF":2.7,"publicationDate":"2024-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142205145","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Abnormal expression of natural mating behaviour of captive adult giant pandas is related to physiological stress. 圈养成年大熊猫自然交配行为的异常表现与生理压力有关。
IF 2.6 3区 环境科学与生态学
Conservation Physiology Pub Date : 2024-09-05 eCollection Date: 2024-01-01 DOI: 10.1093/conphys/coae061
Xueying Wang, Bo Yuan, He Huang, Xiaohui Zhang, Yuliang Liu, Rong Hou, Mingyue Zhang
{"title":"Abnormal expression of natural mating behaviour of captive adult giant pandas is related to physiological stress.","authors":"Xueying Wang, Bo Yuan, He Huang, Xiaohui Zhang, Yuliang Liu, Rong Hou, Mingyue Zhang","doi":"10.1093/conphys/coae061","DOIUrl":"10.1093/conphys/coae061","url":null,"abstract":"<p><p>During <i>ex situ</i> conservation, the adaptability of giant pandas to environmental changes is greatly challenged. The issue of natural reproduction in captive giant pandas remains unresolved both domestically and internationally. It hypothesized that the restricted natural reproductive capacity may be linked to abnormal mating behavior expression due to physiological stress resulting from incompatible pairings in confined environments. To test this hypothesis, we utilized ultra-high performance liquid chromatographytandem quadrupole-time-of-flight mass spectrometry (UPLC-Q-TOF/MS) to analyse urine metabolites in captive adult giant pandas during their breeding period. Simultaneously, enzyme-linked immunosorbent assay was employed to measure the levels of cortisol and epinephrine in urine, providing insight into the psychological state of captive giant pandas during mate selection by examining all metabolites and related biochemical pathways. This comprehensive approach aims to fully elucidate the physiological mechanisms underlying the decline in natural reproductive capacity. The metabolomics findings indicate that the aberrant expression of natural mating behaviour in captive adult male and female giant pandas may be associated with dysfunction in amino acid metabolic pathways. The activation of these metabolic pathways is linked to psychological stress, such as the tryptophan metabolic pathway and GABAergic synapse pathway. The results of physiological indicators indicate a significant correlation between the expression of natural mating behaviour in captive adult pandas and the hormone urine cortisol, which is associated with physiological stress. These findings indicate that the atypical manifestation of natural mating behaviour in captive adult giant pandas may be associated with physiological stress induced by incompatible pairings within confined environments.</p>","PeriodicalId":54331,"journal":{"name":"Conservation Physiology","volume":"12 1","pages":"coae061"},"PeriodicalIF":2.6,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11377310/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142156625","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Influence of sea ice concentration, sex and chick age on foraging flexibility and success in an Arctic seabird. 海冰浓度、性别和雏鸟年龄对北极海鸟觅食灵活性和成功率的影响。
IF 2.6 3区 环境科学与生态学
Conservation Physiology Pub Date : 2024-09-05 eCollection Date: 2024-01-01 DOI: 10.1093/conphys/coae057
Alyssa Eby, Allison Patterson, Shannon Whelan, Kyle H Elliott, H Grant Gilchrist, Oliver P Love
{"title":"Influence of sea ice concentration, sex and chick age on foraging flexibility and success in an Arctic seabird.","authors":"Alyssa Eby, Allison Patterson, Shannon Whelan, Kyle H Elliott, H Grant Gilchrist, Oliver P Love","doi":"10.1093/conphys/coae057","DOIUrl":"10.1093/conphys/coae057","url":null,"abstract":"<p><p>Declining sea ice and increased variability in sea ice dynamics are altering Arctic marine food webs. Changes in sea ice dynamics and prey availability are likely to impact pagophilic (ice-dependent and ice-associated) species, such as thick-billed murres (<i>Uria lomvia</i>), through changes in foraging behaviour and foraging success. At the same time, extrinsic factors, such as chick demand, and intrinsic factors, such as sex, are also likely to influence foraging behaviour and foraging success of adult murres. Here, we use 3 years of data (2017-2019) to examine the impacts of environmental conditions (sea ice concentration and sea surface temperature), sex and chick age (as a proxy for chick demand) on foraging and diving behaviour (measured via biologgers), energy expenditure (estimated from activity budgets) and foraging success (measured via nutritional biomarkers) of thick-billed murres during the incubation and chick-rearing stages at Coats Island, Nunavut. Murres only exhibited foraging flexibility to environmental conditions during incubation, which is also the only stage when ice was present. When more ice was present, foraging effort increased, murres foraged farther and made deeper dives, where murres making deeper dives had higher foraging success (greater relative change in mass). During incubation, murre behaviour was also influenced by sex of the individual, where males made more and shorter trips and more dives. During chick-rearing, murre behaviour was influenced primarily by the sex of the individual and chick age. Males made shallower dives and fewer dive bouts per day, and more dives. Birds made longer, deeper dives as chicks aged, likely representing increased intra-specific competition for prey throughout the season. Our results suggest variation in sea ice concentration does impact foraging success of murres; however, sex-specific foraging strategies may help buffer colony breeding success from variability in sea ice concentration.</p>","PeriodicalId":54331,"journal":{"name":"Conservation Physiology","volume":"12 1","pages":"coae057"},"PeriodicalIF":2.6,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11381092/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142156626","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The effects of marine heatwaves on a coral reef snapper: insights into aerobic and anaerobic physiology and recovery 海洋热浪对珊瑚礁鲷鱼的影响:有氧和无氧生理学及恢复的启示
IF 2.7 3区 环境科学与生态学
Conservation Physiology Pub Date : 2024-08-22 DOI: 10.1093/conphys/coae060
Shannon J McMahon, Philip L Munday, Jennifer M Donelson
{"title":"The effects of marine heatwaves on a coral reef snapper: insights into aerobic and anaerobic physiology and recovery","authors":"Shannon J McMahon, Philip L Munday, Jennifer M Donelson","doi":"10.1093/conphys/coae060","DOIUrl":"https://doi.org/10.1093/conphys/coae060","url":null,"abstract":"Marine heatwaves (MHWs) are increasing in frequency and intensity. Coral reefs are particularly susceptible to MHWs, which cause mass coral bleaching and mortality. However, little is known about how MHWs affect coral reef fishes. Here, we investigated how MHWs affect the physiology of a coral reef mesopredator, Lutjanus carponotatus. Specifically, we exposed mature adults to two different MHW intensities, +1°C (29.5°C) and + 2°C (30.5°C) and measured physiological performance at 2 and 4 weeks of exposure and at 2 weeks post-exposure. At these time points, we measured oxygen consumption at rest and after a simulated fishing capture event, recovery time, excess post-exercise oxygen consumption (EPOC) and associated biochemical markers in the blood (baseline lactate, post-capture lactate, glucose, haemoglobin levels and haematocrit proportion). We found that 2 weeks of exposure to MHW conditions increased resting oxygen consumption (+1°C = 23%, +2°C = 37%), recovery time (+1°C = 62%, +2°C = 77%), EPOC (+1°C = 50%, +2°C = 68%), baseline lactate (+1°C = 27%, +2°C = 28%), post-capture lactate (+1°C = 62%, +2°C = 109%) and haemoglobin levels (+1°C = 13%, +2°C = 28%). This pattern was maintained at 4 weeks of exposure except for post-capture lactate which was reduced (+1°C = −37%, +2°C = 27%). In combination, these results suggest a greater reliance on anaerobic glycolysis to maintain homeostasis in MHW conditions. At 2 weeks post-exposure, when compared to control fish, we found that capture oxygen consumption was increased (+1°C = 25%, +2°C = 26%), recovery rate was increased (+2°C = 38%) and haemoglobin was still higher (+1°C = 15%, +2°C = 21%). These results show that MHW conditions have direct physiological demands on adult coral reef snapper and ecologically relevant residual effects can last for at least 2 weeks post-MHW; however, individuals appear to recover from the negative effects experienced during the MHW. This provides new insight into the effects of MHWs on the physiological performance of coral reef fishes.","PeriodicalId":54331,"journal":{"name":"Conservation Physiology","volume":"6 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142205147","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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