Canadian Journal of Fisheries and Aquatic Sciences最新文献

An integrative approach to assessing bridle shiner (Notropis bifrenatus) distribution using environmental DNA and traditional techniques 利用环境 DNA 和传统技术综合评估桥睢鱼（Notropis bifrenatus）分布的方法

IF 2.4 2区农林科学

Canadian Journal of Fisheries and Aquatic Sciences Pub Date : 2024-08-20 DOI: 10.1139/cjfas-2023-0234

Lara S. Katz, Stephen M. Coghlan, Erik J. Blomberg, Michael T. Kinnison, Geneva York, Joseph D. Zydlewski

{"title":"An integrative approach to assessing bridle shiner (Notropis bifrenatus) distribution using environmental DNA and traditional techniques","authors":"Lara S. Katz, Stephen M. Coghlan, Erik J. Blomberg, Michael T. Kinnison, Geneva York, Joseph D. Zydlewski","doi":"10.1139/cjfas-2023-0234","DOIUrl":"https://doi.org/10.1139/cjfas-2023-0234","url":null,"abstract":"Canadian Journal of Fisheries and Aquatic Sciences, Ahead of Print. <br/> The bridle shiner (Notropis bifrenatus) is a small cyprinid native to the eastern United States and Canada. Bridle shiner populations have declined across their range, and the species now receives concern status or legal protection in 13 states and two provinces. Bridle shiners were historically found in southern and western Maine in densely vegetated, shallow habitats along the shorelines of streams and ponds. We surveyed areas of Maine that supported historical bridle shiner populations using environmental DNA (eDNA) and traditional seine netting methods, and then used eDNA sampling to survey areas with unknown bridle shiner presence. We rediscovered bridle shiner populations at 11 of 32 historically occupied waterbodies and documented bridle shiners in four additional waterbodies. We determined that both eDNA and seine net surveys are viable options for monitoring bridle shiners in Maine and identified ways to streamline the eDNA methods used in this study to reduce the time and cost of future surveys.","PeriodicalId":9515,"journal":{"name":"Canadian Journal of Fisheries and Aquatic Sciences","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2024-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142194871","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Variation in estuary use patterns of juvenile Chinook salmon in the Fraser River, BC 不列颠哥伦比亚省弗雷泽河幼年大鳞大麻哈鱼河口利用模式的变化

IF 2.4 2区农林科学

Canadian Journal of Fisheries and Aquatic Sciences Pub Date : 2024-08-20 DOI: 10.1139/cjfas-2024-0012

David C. Scott, Lia Chalifour, Misty MacDuffee, Julia K. Baum, Terry Beacham, Eric Rondeau, Scott G. Hinch

{"title":"Variation in estuary use patterns of juvenile Chinook salmon in the Fraser River, BC","authors":"David C. Scott, Lia Chalifour, Misty MacDuffee, Julia K. Baum, Terry Beacham, Eric Rondeau, Scott G. Hinch","doi":"10.1139/cjfas-2024-0012","DOIUrl":"https://doi.org/10.1139/cjfas-2024-0012","url":null,"abstract":"Canadian Journal of Fisheries and Aquatic Sciences, Ahead of Print. <br/> Juvenile Pacific salmon (Oncorhynchus spp.) use estuary habitats to varying degrees with some species and populations thought to rely heavily on these areas for early growth. In the Fraser River, British Columbia, there are 18 distinct conservation units of Chinook salmon (O. tshawytscha), and all but one is of conservation concern. Our study compares the outmigration timing, size, and habitat use of juvenile Chinook salmon in the Fraser River estuary. Over 5 years (2016–2020), we captured 6493 juvenile Chinook salmon, with 3318 sampled for stock identification. Fraser River Chinook salmon extensively used estuary habitats, but patterns varied considerably by population. Juvenile Chinook salmon from the Lower Fraser River were most abundant and present the longest, arriving the smallest in late March and early April, and captured until July. South Thompson ocean-type Chinook salmon entered the estuary later, starting to arrive in late May or early June and remaining present until mid-August. Overall, juvenile Chinook salmon varied considerably in their estuary use across populations. Understanding this variation can inform differences in productivity and guide recovery actions.","PeriodicalId":9515,"journal":{"name":"Canadian Journal of Fisheries and Aquatic Sciences","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2024-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142194866","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Declines and shifts in morphological diversity of ciscoes (Coregonus spp.) in lakes Huron and Michigan, 1917–2019 休伦湖和密歇根湖鳕鱼（Coregonus spp.）形态多样性的衰退和变化，1917-2019 年

IF 2.4 2区农林科学

Canadian Journal of Fisheries and Aquatic Sciences Pub Date : 2024-08-20 DOI: 10.1139/cjfas-2023-0357

Paul W. Fedorowicz, Yu-Chun Kao, Amanda S. Ackiss, Katie V. Anweiler, Andrew E. Honsey

{"title":"Declines and shifts in morphological diversity of ciscoes (Coregonus spp.) in lakes Huron and Michigan, 1917–2019","authors":"Paul W. Fedorowicz, Yu-Chun Kao, Amanda S. Ackiss, Katie V. Anweiler, Andrew E. Honsey","doi":"10.1139/cjfas-2023-0357","DOIUrl":"https://doi.org/10.1139/cjfas-2023-0357","url":null,"abstract":"Canadian Journal of Fisheries and Aquatic Sciences, Ahead of Print. <br/> Ciscoes (Coregonus spp.) were historically abundant and ecologically important in Laurentian Great Lakes ecosystems. Despite well-documented declines in their abundance and taxonomic diversity, declines in morphological diversity remain understudied. This knowledge gap is especially pertinent for lakes Michigan and Huron, which have each lost six of eight historical species. Improved understanding of historical and contemporary morphological diversity of Great Lakes ciscoes can inform ongoing restoration efforts and further elucidate the factors that contributed to declines. Our goal was to characterize shifts in morphological diversity of ciscoes in lakes Michigan and Huron over a century (1917–2019). We analyzed size-corrected morphometric and meristic measurements from three periods: Early (1917–1923), Middle (1950–1972), and Contemporary (2015–2019). We then identified morphologically distinct clusters while remaining agnostic to species identifications. We found that morphological diversity and the number of distinct clusters declined over time. We then leveraged species identifications to highlight key species losses and examine morphological shifts among extant species. Our findings provide insights into the historical and contemporary morphological diversity of ciscoes and will inform restoration efforts.","PeriodicalId":9515,"journal":{"name":"Canadian Journal of Fisheries and Aquatic Sciences","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2024-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142194870","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Understanding the dynamics of fish spawning phenology and habitat in a changing ecosystem using a long-term ichthyoplankton monitoring dataset 利用鱼类浮游生物长期监测数据集，了解不断变化的生态系统中鱼类产卵表型和生境的动态变化

IF 1.9 2区农林科学

Canadian Journal of Fisheries and Aquatic Sciences Pub Date : 2024-08-09 DOI: 10.1139/cjfas-2023-0361

Noah Hunt, Katrina Rokosz, Yong Chen

{"title":"Understanding the dynamics of fish spawning phenology and habitat in a changing ecosystem using a long-term ichthyoplankton monitoring dataset","authors":"Noah Hunt, Katrina Rokosz, Yong Chen","doi":"10.1139/cjfas-2023-0361","DOIUrl":"https://doi.org/10.1139/cjfas-2023-0361","url":null,"abstract":"As ecosystems change, understanding the consequences for fish population dynamics and habitat use is essential for their management. Using white perch (Morone americana) survey data on early life stages collected during a long-term ichthyoplankton monitoring program in the Hudson River (New York, USA), an ecosystem under immense pressure from climate change, ecological shifts, and anthropogenic activities, we evaluated the drivers of changes in egg abundance and spawning habitat between 1980-2017. Results indicated that egg abundance is associated nonlinearly with temperature, conductivity, discharge, depth, location, and the week of year. Additionally, large changes in hotspots of spawning activity within the Hudson River were identified and the lower extent of spawning habitat has moved upriver since 1980. We also found that egg abundance has declined within the river over time. This study indicates that the dynamics of white perch early life histories and spawning habitat are changing. It also highlights the utility of a long-term monitoring program for broadening our understanding of fish ecology in the age of big data in changing ecosystems.","PeriodicalId":9515,"journal":{"name":"Canadian Journal of Fisheries and Aquatic Sciences","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141922472","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Increasing microplastic exposure had minimal effects on fatty acid composition in zooplankton and yellow perch in a large, in-lake mesocosm experiment 在一项大型湖内中观实验中，增加微塑料暴露对浮游动物和黄鲈的脂肪酸组成影响甚微

IF 1.9 2区农林科学

Canadian Journal of Fisheries and Aquatic Sciences Pub Date : 2024-08-08 DOI: 10.1139/cjfas-2024-0149

Garth Covernton, Adam Metherel, Bailey C. McMeans, K. Bucci, Desiree Langenfeld, Rachel McNamee, Cody Veneruzzo, Matthew J. Hoffman, D. M. Orihel, Michael J. Paterson, Jennifer Provencher, M. D. Rennie, Chelsea M Rochman

{"title":"Increasing microplastic exposure had minimal effects on fatty acid composition in zooplankton and yellow perch in a large, in-lake mesocosm experiment","authors":"Garth Covernton, Adam Metherel, Bailey C. McMeans, K. Bucci, Desiree Langenfeld, Rachel McNamee, Cody Veneruzzo, Matthew J. Hoffman, D. M. Orihel, Michael J. Paterson, Jennifer Provencher, M. D. Rennie, Chelsea M Rochman","doi":"10.1139/cjfas-2024-0149","DOIUrl":"https://doi.org/10.1139/cjfas-2024-0149","url":null,"abstract":"Using 10-m diameter mesocosms in a Canadian boreal lake, we investigated the effects of MP exposure on the body weight and diet of yellow perch (Perca flavescens) and the fatty acid composition of yellow perch and zooplankton. We exposed the aquatic ecosystem within seven mesocosms for 10 weeks to a mixture of polyethylene, polystyrene, and polyethylene terephthalate fragments, ranging in nominal addition concentrations from 6 to 29,240 particles L-1 (although realized water column concentrations were lower), as well as two negative controls. Increasing MP exposure did not affect yellow perch body weight (growth) or diet, or the overall fatty acid composition of yellow perch muscle or zooplankton. Results were highly variable across mesocosms. Despite high levels of MP ingestion by yellow perch, we did not find evidence of MPs leading to food dilution or any other effect where we could anticipate impacts on food web structure.","PeriodicalId":9515,"journal":{"name":"Canadian Journal of Fisheries and Aquatic Sciences","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141929569","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Small pelagic fish: new frontiers in science and sustainable management 小型中上层鱼类：科学和可持续管理的新领域

IF 2.4 2区农林科学

Canadian Journal of Fisheries and Aquatic Sciences Pub Date : 2024-08-01 DOI: 10.1139/cjfas-2024-0104

Christopher N. Rooper, Jennifer L. Boldt, Andres Uriarte, Cecilie Hansen, Tim Ward, Sarah Gaichas

{"title":"Small pelagic fish: new frontiers in science and sustainable management","authors":"Christopher N. Rooper, Jennifer L. Boldt, Andres Uriarte, Cecilie Hansen, Tim Ward, Sarah Gaichas","doi":"10.1139/cjfas-2024-0104","DOIUrl":"https://doi.org/10.1139/cjfas-2024-0104","url":null,"abstract":"Canadian Journal of Fisheries and Aquatic Sciences, Volume 81, Issue 8, Page 984-989, August 2024. <br/> Small pelagic fishes occupy an important trophic role in every global aquatic ecosystem, and many species are heavily exploited by fisheries, including some of the largest and most valuable capture fisheries in the world. In November 2022, a symposium on small pelagic fish titled “Small Pelagic Fish: New Frontiers in Science and Sustainable Management” was cohosted by PICES, ICES, and FAO in Lisbon, Portugal. This special issue contains a collection of research manuscripts that explore approaches currently being used and developed to assess and manage small pelagic fishes. In particular, this issue covers topics on novel approaches to surveying small pelagic fishes, incorporating environmental covariates into management, management strategy evaluation, and aspects of the economics of small pelagic fisheries. The conclusions highlight the importance of new approaches that seek to enhance small pelagic fish surveys and ecosystem monitoring, incorporate that ecosystem information into management strategy evaluation, and predict the potential impacts of ecosystem changes on outcomes for economies and communities that rely on sustainable populations of small pelagic fishes.","PeriodicalId":9515,"journal":{"name":"Canadian Journal of Fisheries and Aquatic Sciences","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141884007","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Intraspecific Variation in Metabolic Responses of a Cool Water Fish to Increasing Temperatures 冷水性鱼类对温度升高的代谢反应的种内差异

IF 1.9 2区农林科学

Canadian Journal of Fisheries and Aquatic Sciences Pub Date : 2024-07-25 DOI: 10.1139/cjfas-2023-0377

Scott Alexander Jackson, Kelsey N Lucas, Kevin E. Wehrly, Karen Alofs

{"title":"Intraspecific Variation in Metabolic Responses of a Cool Water Fish to Increasing Temperatures","authors":"Scott Alexander Jackson, Kelsey N Lucas, Kevin E. Wehrly, Karen Alofs","doi":"10.1139/cjfas-2023-0377","DOIUrl":"https://doi.org/10.1139/cjfas-2023-0377","url":null,"abstract":"Growing impacts of climate change necessitate predicting species' vulnerability to altered ecosystems. Assessing vulnerability requires understanding how species' physiology, life history, and ecology vary among populations and can be altered by behavioral, plastic, and evolutionary adaptations. To examine intraspecific variation in sensitivity to climate change, we measured metabolic responses to acute and chronic temperature exposures in three rearing pond populations of walleye (Sander vitreus), a cool-water-adapted fish species threatened by climate change. We show significant differences among rearing pond populations in response to increasing temperatures which may originate from broodstock, developmental plasticity, and acclimation. Our results indicate northern walleye may be more tolerant of acute and chronic exposure to higher temperatures by being able to maintain a higher aerobic scope than more southern populations. Furthermore, even over small geographic distances, populations can have significantly different physiological responses to environmental stressors. Quantifying variation in population-specific metabolic responses can inform predictions of growth, reproduction, and fitness across a species range and clarify the importance of within-species diversity in determining vulnerability to environmental stressors.","PeriodicalId":9515,"journal":{"name":"Canadian Journal of Fisheries and Aquatic Sciences","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141803163","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Seabird inputs drive changes in Cladocera assemblages in freshwater ponds 海鸟输入驱动淡水池塘中桡足类生物群落的变化

IF 1.9 2区农林科学

Canadian Journal of Fisheries and Aquatic Sciences Pub Date : 2024-07-24 DOI: 10.1139/cjfas-2024-0063

Zoe Adria Kane, Matthew P. Duda, Brigitte Simmatis, J. Smol

{"title":"Seabird inputs drive changes in Cladocera assemblages in freshwater ponds","authors":"Zoe Adria Kane, Matthew P. Duda, Brigitte Simmatis, J. Smol","doi":"10.1139/cjfas-2024-0063","DOIUrl":"https://doi.org/10.1139/cjfas-2024-0063","url":null,"abstract":"Seabirds are biovectors that transport large concentrations of nutrients from their marine feeding areas to terrestrial breeding grounds. Here, we used subfossil cladoceran assemblages to assess if, and how, changes in the world’s largest colony of Leach’s Storm Petrels affected the structure of Cladocera assemblages over the past ~1700 years. Using sediment cores from four ponds impacted by Leach’s Storm-Petrel colonies on Baccalieu Island (NL, Canada), we observed a consistent transition in cladoceran assemblages from benthic/littoral to pelagic taxa in association with high seabird presence. This shift aligns with previously published limnological changes that tracked the growth of the colony. Compared to trends in sedimentary chlorophyll-a, pelagic cladoceran taxa lagged behind algal shifts driven by seabird activity. The main drivers of cladoceran assemblage shifts were likely alterations to the physical habitat structure and food availability driven by seabird inputs. Furthermore, deposition of calcium from seabirds may have also contributed to changing the composition of cladoceran communities. Our study provides information on food web shifts associated with seabird-driven eutrophication, which can be compared to future paleoecological studies.","PeriodicalId":9515,"journal":{"name":"Canadian Journal of Fisheries and Aquatic Sciences","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141809191","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Community experiences and perceptions of aquatic change in ᑭᙵᐃᑦ, ᓄᓇᕗᑦ (Kinngait, Nunavut) ᑭᙵᐃᑦ、ᓄᓇᕗᑦ（努纳武特地区金盖特）社区对水生变化的体验和看法

IF 1.9 2区农林科学

Canadian Journal of Fisheries and Aquatic Sciences Pub Date : 2024-07-24 DOI: 10.1139/cjfas-2023-0252

Allison Kathleen Drake, Aiviq Hunters and Trappers Association , Laurissa R. Christie, Vivian Nguyen, Steven M Alexander, K. Dunmall

{"title":"Community experiences and perceptions of aquatic change in ᑭᙵᐃᑦ, ᓄᓇᕗᑦ (Kinngait, Nunavut)","authors":"Allison Kathleen Drake, Aiviq Hunters and Trappers Association , Laurissa R. Christie, Vivian Nguyen, Steven M Alexander, K. Dunmall","doi":"10.1139/cjfas-2023-0252","DOIUrl":"https://doi.org/10.1139/cjfas-2023-0252","url":null,"abstract":"Climate change and development are shaping Arctic ecosystems in unprecedented ways intimately known to Inuit. To describe changes in aquatic habitats and species near Kinngait, Nunavut, researchers co-created a questionnaire with the Aiviq Hunters and Trappers Association and community technicians. Inuit knowledge, centered on experiences and perceptions of marine, coastal, and lacustrine shifts, was gathered from 39 knowledge holders. Responses indicated that across ecosystems, turbidity and waves are not likely changing, wind and erosion may be changing, and water is warming. Ice is thinner, breaking up earlier, forming later, and diminishing in extent. These shifts are altering harvest timing in the spring and winter, and are rendering travel on the land increasingly difficult. While most knowledge holders reported no change in the diversity and abundance of marine mammals, fishes, and invertebrates, others expressed that ringed seal and beluga whale may be declining, salmon are appearing, and mussels are proliferating. Inuit insights and voices consolidated through this endeavour will serve the community and contribute to a baseline of documented knowledge to help understand ongoing change.","PeriodicalId":9515,"journal":{"name":"Canadian Journal of Fisheries and Aquatic Sciences","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141808667","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

California steelhead populations were regionally buffered and individually resistant to a severe multi-year drought 加利福尼亚的钢镞种群受到区域缓冲作用的影响，可单独抵御多年严重干旱的影响

IF 1.9 2区农林科学

Canadian Journal of Fisheries and Aquatic Sciences Pub Date : 2024-07-19 DOI: 10.1139/cjfas-2023-0198

Haley Ohms, E. P. Palkovacs, D. Boughton

{"title":"California steelhead populations were regionally buffered and individually resistant to a severe multi-year drought","authors":"Haley Ohms, E. P. Palkovacs, D. Boughton","doi":"10.1139/cjfas-2023-0198","DOIUrl":"https://doi.org/10.1139/cjfas-2023-0198","url":null,"abstract":"Weather extremes, such as drought, are predicted to be a strong determinant of species persistence under climate change. Yet predictions often fail to consider that variation in streamflow responses, variation in population dynamics, or adaptations to drought could buffer species against extremes. In this study we examined the responses of eight California (USA) steelhead populations to a severe drought from 2012 to 2016. We observed that streamflows were highly synchronous across the region in all seasons and did not appear to buffer drought impacts. Population dynamics were variable across the region and did appear to buffer the region from drought impacts. Some populations had very low productivity for four years associated with the drought, while others had slightly below-average productivity for only two years. Population synchrony was associated with spring-smolt flow, temperature and drought over time, but was not associated with winter-spawner or summer-juvenile conditions, suggesting populations may be adapted to drought. Our results highlight how regional buffering and adaptation can be important mechanisms against climate extremes both now and into the future.","PeriodicalId":9515,"journal":{"name":"Canadian Journal of Fisheries and Aquatic Sciences","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141821344","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0