Canadian Journal of Fisheries and Aquatic Sciences最新文献

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Freshwater fish otoliths record signals from both water and physiological processes: new insights from Sr/Ca and Ba/Ca ratios 淡水鱼耳石同时记录了水和生理过程的信号:从 Sr/Ca 和 Ba/Ca 比值中获得新启示
IF 2.4 2区 农林科学
Canadian Journal of Fisheries and Aquatic Sciences Pub Date : 2024-01-09 DOI: 10.1139/cjfas-2022-0030
G. Bareille, M. Vignon, A. Chappaz, A. Fontaine, H. Tabouret, F. Morat, J. Martin, J.C. Aymes, F. Daverat, C. Pécheyran, O. Donard
{"title":"Freshwater fish otoliths record signals from both water and physiological processes: new insights from Sr/Ca and Ba/Ca ratios","authors":"G. Bareille, M. Vignon, A. Chappaz, A. Fontaine, H. Tabouret, F. Morat, J. Martin, J.C. Aymes, F. Daverat, C. Pécheyran, O. Donard","doi":"10.1139/cjfas-2022-0030","DOIUrl":"https://doi.org/10.1139/cjfas-2022-0030","url":null,"abstract":"Canadian Journal of Fisheries and Aquatic Sciences, Ahead of Print. <br/> Using strontium (Sr) and barium (Ba) in otoliths to determine natal origins and understand patterns of fish movements is based on the fundamental assumption that otoliths record water chemistry signals without any major alterations. Although prior studies highlighted that fish physiology can modify the water signal in otoliths, studies for freshwater fish are scarce. We exposed different groups of Atlantic salmon parr Salmo salar to different scenarios of ambient-level variations in Sr/Ca and Ba/Ca ratios and then combined otolith chemical profiles with environmental data (water chemistry and temperature), Fulton's index, and otolith growth rates to assess what factors explain/influence the elemental ratios of Sr and Ba in otoliths. Generalized additive mixed models (GAMMs) using water-based otolith composition, temperature, Fulton's index, and “individual” as explanatory variables allow to demonstrate that water chemistry alone cannot fully explain measured ratios in otoliths, except in scenarios involving significant changes in water chemistry. Other factors (physiological effects) should be accounted for reproducing short and minimal seasonal variations in water composition, considering that inter-individual variability contributes quite significantly in most scenarios.","PeriodicalId":9515,"journal":{"name":"Canadian Journal of Fisheries and Aquatic Sciences","volume":"212 4 1","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139376362","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
Spatiotemporal model improves survey indices for witch flounder stock assessment in the Grand Banks 时空模型改进了大浅滩巫师鲽鱼量评估的调查指数
IF 2.4 2区 农林科学
Canadian Journal of Fisheries and Aquatic Sciences Pub Date : 2024-01-09 DOI: 10.1139/cjfas-2023-0101
Jiaying Chen, Jinrong Gao, Fan Zhang
{"title":"Spatiotemporal model improves survey indices for witch flounder stock assessment in the Grand Banks","authors":"Jiaying Chen, Jinrong Gao, Fan Zhang","doi":"10.1139/cjfas-2023-0101","DOIUrl":"https://doi.org/10.1139/cjfas-2023-0101","url":null,"abstract":"Accurate and precise estimates of survey abundance indices are essential inputs for stock assessment models therefore are important for the successful conservation and management of fisheries stocks. Since abundance indices can be standardized by various different ways from conventional design-based approaches to model-based approaches, it is essential to compare the efficiency of those approaches and quantify the consequences for stock assessments. In this study, we focus on an important commercial stock of witch flounder (Glyptocephalus cynoglossus) in NAFO 3N+3O divisions. We first compare the survey indices standardized by design-based and model-based approaches, and find that a model-based estimator provides more precise estimates of survey indices than design-based approach for this stock. We then apply a widely used Age-structured Statistical Catch-at-Length (ACL) assessment model to the standardized catch-at-length survey indices from both approaches to estimate the age-based population dynamics for this stock. We conclude that the ACL model fit to model-based indices performed better than the same model fit to design-based indices.","PeriodicalId":9515,"journal":{"name":"Canadian Journal of Fisheries and Aquatic Sciences","volume":"52 29","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139442140","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
Semi-pelagic self-adjusting otter boards: effects on the catching performance of a demersal trawl 半远洋自动调节水獭板:对底栖拖网捕捞性能的影响
IF 2.4 2区 农林科学
Canadian Journal of Fisheries and Aquatic Sciences Pub Date : 2024-01-09 DOI: 10.1139/cjfas-2023-0224
Morteza Eighani, T. Malta, Valentina Melli, Finbarr G. O’Neill
{"title":"Semi-pelagic self-adjusting otter boards: effects on the catching performance of a demersal trawl","authors":"Morteza Eighani, T. Malta, Valentina Melli, Finbarr G. O’Neill","doi":"10.1139/cjfas-2023-0224","DOIUrl":"https://doi.org/10.1139/cjfas-2023-0224","url":null,"abstract":"In this study, we investigate whether replacing conventional seabed-contacting otter boards with semi-pelagic self-adjusting otter boards (SAO), which have the ability to maintain a given height above the seabed, affects catch efficiency of a demersal fish trawl. Experimental fishing trials, using the alternate haul method, were conducted in the Kattegat and Skagerrak with three otter board configurations using: conventional seabed-contacting otter boards; the SAO set to maintain a target height over the seabed of 1 m; and the SAO set to maintain a target height 5 m. Replacing conventional otter boards with SAO resulted in a loss of catch efficiency for haddock (Melanogrammus aeglefinus), whiting (Merlangius merlangus), and plaice (Hippoglossoides platessoides), while no significant difference was found for cod (Gadus morhua), common dab (Limanda limanda) and lemon sole (Microstomus kitt). When comparing the SAO - 1m and SAO - 5m, it was observed that SAO - 5m resulted in a loss of catch efficiency for haddock and plaice, a minimal reduction for cod and no significant difference for whiting, common dab, and lemon sole.","PeriodicalId":9515,"journal":{"name":"Canadian Journal of Fisheries and Aquatic Sciences","volume":"4 6","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139443874","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
Note of appreciation 感谢信
IF 2.4 2区 农林科学
Canadian Journal of Fisheries and Aquatic Sciences Pub Date : 2024-01-01 DOI: 10.1139/cjfas-2023-0263
{"title":"Note of appreciation","authors":"","doi":"10.1139/cjfas-2023-0263","DOIUrl":"https://doi.org/10.1139/cjfas-2023-0263","url":null,"abstract":"Canadian Journal of Fisheries and Aquatic Sciences, Volume 81, Issue 1, Page i-i, January 2024. <br/>","PeriodicalId":9515,"journal":{"name":"Canadian Journal of Fisheries and Aquatic Sciences","volume":"56 1","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139083111","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
Evaluation of survival estimates generated from tracking downstream migrating juvenile sea lamprey (Petromyzon marinus) with a miniature acoustic telemetry tag 评估利用微型声学遥测标签追踪顺流而下的幼年海鳗(Petromyzon marinus)所得出的存活率估计值
IF 2.4 2区 农林科学
Canadian Journal of Fisheries and Aquatic Sciences Pub Date : 2023-12-22 DOI: 10.1139/cjfas-2023-0194
Taylor F. Haas, Travis O. Brenden, Zhiqun Daniel Deng, C. M. Wagner
{"title":"Evaluation of survival estimates generated from tracking downstream migrating juvenile sea lamprey (Petromyzon marinus) with a miniature acoustic telemetry tag","authors":"Taylor F. Haas, Travis O. Brenden, Zhiqun Daniel Deng, C. M. Wagner","doi":"10.1139/cjfas-2023-0194","DOIUrl":"https://doi.org/10.1139/cjfas-2023-0194","url":null,"abstract":"Fish that undertake juvenile migration pass through habitats that vary in mortality risk. The ability to identify regions of persistent low survival would improve fishery management. We conducted a field study combined with predictive modeling of survival in downstream migrating juvenile sea lamprey using a new micro-acoustic telemetry tag designed for implantation into small, slender-bodied fishes. Detection data were collected from eight receivers placed across a coastal riverine-wetland-lake complex. Juvenile sea lamprey initiated downstream movement near nautical twilight, stopped frequently, and were more likely to move during high river discharge. Estimated survival was highest in the riverine reach, declined through the river-wetland complex, and dropped precipitously in the drowned rivermouth lake. However, the high transmission rate and resulting short battery life of the micro-transmitters (as configured) likely resulted in missed detections in the lower reaches. Simulation analyses suggested survival estimation could be improved by increasing the number of tagged lamprey and staggering release locations. We offer practical recommendations for the use of this new transmitter in field studies with small anguilliform fishes.","PeriodicalId":9515,"journal":{"name":"Canadian Journal of Fisheries and Aquatic Sciences","volume":"9 5","pages":""},"PeriodicalIF":2.4,"publicationDate":"2023-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138944555","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
Determining early marine survival and predation by endothermic predators on acoustically-tagged Atlantic salmon (Salmo salar) post-smolts 确定声学标记的大西洋鲑(Salmo salar)蜕皮后的早期海洋存活率和内热捕食者的捕食情况
IF 2.4 2区 农林科学
Canadian Journal of Fisheries and Aquatic Sciences Pub Date : 2023-12-22 DOI: 10.1139/cjfas-2023-0206
G. English, B. M. Wilson, Michael J Lawrence, M. Black, James P Hawkes, David C Hardie, Jason M Daniels, Jonathan W. Carr, Claire Rycroft, Glenn T. Crossin, Fred Whoriskey, Cornelia E. den Heyer, X. Bordeleau, C. McKindsey, Marc Trudel
{"title":"Determining early marine survival and predation by endothermic predators on acoustically-tagged Atlantic salmon (Salmo salar) post-smolts","authors":"G. English, B. M. Wilson, Michael J Lawrence, M. Black, James P Hawkes, David C Hardie, Jason M Daniels, Jonathan W. Carr, Claire Rycroft, Glenn T. Crossin, Fred Whoriskey, Cornelia E. den Heyer, X. Bordeleau, C. McKindsey, Marc Trudel","doi":"10.1139/cjfas-2023-0206","DOIUrl":"https://doi.org/10.1139/cjfas-2023-0206","url":null,"abstract":"Many Atlantic salmon (Salmo salar) populations have experienced significant declines for decades throughout North America and Europe. Mortality due to marine mammal predation during their early marine life could be an important factor contributing to these declines and limiting their population recoveries. However, quantifying predation events and particularly the extent of marine mammal predation on Atlantic salmon remains a challenge. In this study, we estimated the contribution of mesothermic and endothermic species predation to the mortality of Atlantic salmon post-smolts during their early marine life using acoustic telemetry. Predation events were inferred from changes in temperatures and depths experienced by acoustically tagged hatchery-reared Atlantic salmon smolts. No salmon were consumed by mesothermic predators, with most endothermic predation events being classified as marine mammals. Post-smolt mortality during the study period was low overall in both years (13.1 – 16.7%), with endothermic predation accounting for 33.1 – 42.9% of all marine mortality events (5.2 – 5.6% mortality). Our results suggest that the current low return of adult Atlantic salmon observed in this area in recent years was not heavily influenced by endothermic predation on post-smolts in the first weeks at sea.","PeriodicalId":9515,"journal":{"name":"Canadian Journal of Fisheries and Aquatic Sciences","volume":"78 22","pages":""},"PeriodicalIF":2.4,"publicationDate":"2023-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138945516","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
Tracking aquatic animals to understand a world increasingly shaped by a changing climate and extreme weather events 跟踪水生动物,了解日益受到气候变化和极端天气事件影响的世界
IF 2.4 2区 农林科学
Canadian Journal of Fisheries and Aquatic Sciences Pub Date : 2023-12-06 DOI: 10.1139/cjfas-2023-0145
R. Lennox, Pedro Afonso, K. Birnie‐Gauvin, Lotte S. Dahlmo, C. I. Nilsen, R. Arlinghaus, Steven J. Cooke, Allan T. Souza, Ivan Jarić, M. Prchalová, M. Říha, S. Westrelin, W. Twardek, Eneko Aspillaga, Sebastian Kraft, M. Šmejkal, H. Baktoft, Tomas Brodin, Gustav Hellström, David Villegas-Ríos, K. Vollset, Timo Adam, L. Sortland, Michael G Bertram, Marcelo Crossa, Emma Vogel, Natasha Gillies, Jan Reubens
{"title":"Tracking aquatic animals to understand a world increasingly shaped by a changing climate and extreme weather events","authors":"R. Lennox, Pedro Afonso, K. Birnie‐Gauvin, Lotte S. Dahlmo, C. I. Nilsen, R. Arlinghaus, Steven J. Cooke, Allan T. Souza, Ivan Jarić, M. Prchalová, M. Říha, S. Westrelin, W. Twardek, Eneko Aspillaga, Sebastian Kraft, M. Šmejkal, H. Baktoft, Tomas Brodin, Gustav Hellström, David Villegas-Ríos, K. Vollset, Timo Adam, L. Sortland, Michael G Bertram, Marcelo Crossa, Emma Vogel, Natasha Gillies, Jan Reubens","doi":"10.1139/cjfas-2023-0145","DOIUrl":"https://doi.org/10.1139/cjfas-2023-0145","url":null,"abstract":"Despite great promise for understanding the impacts and extent of climate change on aquatic animals, their species, and ecological communities, it is surprising that tracking tools, like biotelemetry and biologging devices, have not been extensively used to understand climate change or develop and evaluate potential interventions that may forestall or mitigate its effects. In this review, we provide an overview of methodologies and study designs that leverage available tracking tools to investigate aspects of climate change on aquatic ecosystems. Key interventions to protect aquatic life from the impacts of climate change, including habitat restoration, protected areas, conservation translocations, mitigations against interactive effects of climate change, and simulation of future scenarios can all be greatly facilitated by using electronic tagging and tracking. We anticipate that adapting study designs (e.g. use of replicated ponds, randomized control trials, physiologging) to effectively use tracking will greatly enhance our understanding of climate change and its impacts on aquatic ecosystems, hopefully also facilitating research into effective solutions and interventions against the most extreme and acute impacts.","PeriodicalId":9515,"journal":{"name":"Canadian Journal of Fisheries and Aquatic Sciences","volume":"61 10","pages":""},"PeriodicalIF":2.4,"publicationDate":"2023-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138596352","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
Life-cycle modeling reveals high recovery potential of at-risk wild Chinook salmon via improved migrant survival 生命周期模型显示,濒危野生大鳞大麻哈鱼通过提高洄游存活率具有很高的恢复潜力
IF 2.4 2区 农林科学
Canadian Journal of Fisheries and Aquatic Sciences Pub Date : 2023-12-05 DOI: 10.1139/cjfas-2023-0167
Gregory R. Jacobs, R. Thurow, C. Petrosky, C. Osenberg, Seth J. Wenger
{"title":"Life-cycle modeling reveals high recovery potential of at-risk wild Chinook salmon via improved migrant survival","authors":"Gregory R. Jacobs, R. Thurow, C. Petrosky, C. Osenberg, Seth J. Wenger","doi":"10.1139/cjfas-2023-0167","DOIUrl":"https://doi.org/10.1139/cjfas-2023-0167","url":null,"abstract":"Chinook salmon (Oncorhynchus tshawytscha) in the Columbia River basin are threatened by anthropogenic changes to migratory corridors, estuaries, and natal habitats. Streams provide spatially heterogeneous natal habitats essential for salmon spawning and rearing life stages. We fit a statistical state-space model to salmon populations in Idaho’s Middle Fork Salmon River (MFSR) to assess spatial variation in natal productivity and population growth. Our model integrated multiple long-term data sets to estimate variation in per-capita smolt production and smolt-to-adult (SAR) survival. Smolt production varied across stream segments, averaging 104.48 female smolts per spawning female, while SARs averaged 0.74%. Chinook salmon population growth rates exceeded replacement in 17% of segments (four of 23). By increasing SARs to 1.8% (near the lower bound of Columbia River basin recovery targets), we predict that all 23 MFSR segments will yield positive population growth rates at contemporary (very low) spawner densities. Our analysis suggests that for Snake River basin populations within high-quality natal habitats, SAR improvements will elevate salmon population growth rates and enhance restoration of at-risk wild Chinook salmon.","PeriodicalId":9515,"journal":{"name":"Canadian Journal of Fisheries and Aquatic Sciences","volume":"141 22","pages":""},"PeriodicalIF":2.4,"publicationDate":"2023-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138598794","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
Lake characteristics drive concordant trophic responses across ecosystems in three top predator fish species 湖泊特征驱动三种顶级掠食性鱼类在不同生态系统中做出一致的营养反应
IF 2.4 2区 农林科学
Canadian Journal of Fisheries and Aquatic Sciences Pub Date : 2023-12-04 DOI: 10.1139/cjfas-2023-0240
Mary Thelen, David Gallagher, Payton Johnson, Sara Kangas, Dylan McNulty, Alexandra Morrison, B. R. Herwig, David F Staples, K. Zimmer
{"title":"Lake characteristics drive concordant trophic responses across ecosystems in three top predator fish species","authors":"Mary Thelen, David Gallagher, Payton Johnson, Sara Kangas, Dylan McNulty, Alexandra Morrison, B. R. Herwig, David F Staples, K. Zimmer","doi":"10.1139/cjfas-2023-0240","DOIUrl":"https://doi.org/10.1139/cjfas-2023-0240","url":null,"abstract":"Understanding similarities in trophic ecology of top predators is crucial given their influences on food webs. We sampled walleye (Sander vitreus), northern pike (Esox lucius), and muskellunge (Esox masquinongy) from 17 Minnesota (USA) lakes and used δ13C and δ15N to estimate littoral carbon use, trophic position, and isotopic niche size of each species. All three species showed large inter-lake variability yet had concordant trophic responses across lakes, as littoral carbon use, trophic position, variability in littoral carbon and trophic position, and niche size were all positively related among species across lakes. Concordant responses were driven by a few key lake variables, with trophic position positively related to proportion littoral area and depth of hypoxic water, littoral carbon positively related to depth of hypoxic water and presence of zebra mussels (Dreissena polymorpha), and niche size inversely related to lake area. Our results indicate lake characteristics may influence food webs via consistent effects on multiple top predators. They also show that the amount of suitable habitat can be important for the ecosystem size hypothesis for trophic position.","PeriodicalId":9515,"journal":{"name":"Canadian Journal of Fisheries and Aquatic Sciences","volume":"38 6","pages":""},"PeriodicalIF":2.4,"publicationDate":"2023-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138602687","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
Cross-scale environmental impacts across persistent and dynamic aggregations within a complex population: implications for fisheries management 复杂种群中持续和动态聚集的跨尺度环境影响:对渔业管理的影响
IF 2.4 2区 农林科学
Canadian Journal of Fisheries and Aquatic Sciences Pub Date : 2023-12-01 DOI: 10.1139/cjfas-2023-0120
Georgios Kerametsidis, James T Thorson, Vincent Rossi, D. Álvarez-Berastegui, Cheryl Barnes, Gregoire Certain, Antonio Esteban, Encarnacion García, A. Jadaud, Safo Piñeiro, Miguel Vivas, Manuel Hidalgo
{"title":"Cross-scale environmental impacts across persistent and dynamic aggregations within a complex population: implications for fisheries management","authors":"Georgios Kerametsidis, James T Thorson, Vincent Rossi, D. Álvarez-Berastegui, Cheryl Barnes, Gregoire Certain, Antonio Esteban, Encarnacion García, A. Jadaud, Safo Piñeiro, Miguel Vivas, Manuel Hidalgo","doi":"10.1139/cjfas-2023-0120","DOIUrl":"https://doi.org/10.1139/cjfas-2023-0120","url":null,"abstract":"Accounting for marine stocks spatiotemporal complexity has become one of the most pressing improvements that should be added to the new generation of stock assessment. Disentangling persistent and dynamic population subcomponents and understanding their main drivers of variation are still stock-specific challenges. Here, we hypothesized that the spatiotemporal variability of two adjacent fish stocks density is associated with spatially structured environmental processes across multiple spatiotemporal scales. To test this, we applied a generalized Empirical Orthogonal Function and Dynamic Factor Analysis to fishery-independent and -dependent data of red mullet, a highly commercial species, in the Western Mediterranean Sea. Areas with persistent and dynamic high aggregations were detected for both stock units. A large-scale climatic index and local open-ocean convection were associated with both stocks while other variables exhibited stock-specific effects. We also revealed spatially structured density dynamics within the examined management units. This suggests a metapopulation structure and supports the future implementation of a spatial stock assessment. Considering the common assumptions of panmictic structure and absence of connectivity with neighbouring stock units, our methodology can be applied to other species and systems with putative spatial complexity to inform a more accurate structure of biological populations.","PeriodicalId":9515,"journal":{"name":"Canadian Journal of Fisheries and Aquatic Sciences","volume":"128 2","pages":""},"PeriodicalIF":2.4,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138622246","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
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