{"title":"Stocks and Fishery of Cod (Gadus macrocephalus, Gadidae) in the Northwestern Bering Sea in 1965–2022","authors":"A. B. Savin","doi":"10.1134/s1063074023070155","DOIUrl":null,"url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Cod stocks dynamics and annual catches in the northwestern Bering Sea from 1965 to 2022 are determined based on materials collected in the research surveys and commercial expeditions, as well as on the data of fishery statistics and literature data. Various biological parameters concerning fisheries have been calculated: instantaneous fishing mortality rate, instantaneous natural mortality rate, von Bertalanffy equation parameters, etc. The decline in stocks is presumably linked to the expanding Laurentian cold spot, as well as to bottom trawl fishing on spawning grounds. It was concluded that since 2002, the fishing pressure on the cod stock was moderate, and fishing mortality did not exceed its target level. However, if the trend of rapid decline in cod stocks continues in the next 3–4 years and the fishing pressure is relatively high, the instantaneous fishing mortality rate may increase. It may exceed the target reference point, and even the limit reference point.</p>","PeriodicalId":49584,"journal":{"name":"Russian Journal of Marine Biology","volume":null,"pages":null},"PeriodicalIF":0.5000,"publicationDate":"2024-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Russian Journal of Marine Biology","FirstCategoryId":"99","ListUrlMain":"https://doi.org/10.1134/s1063074023070155","RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"MARINE & FRESHWATER BIOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
Cod stocks dynamics and annual catches in the northwestern Bering Sea from 1965 to 2022 are determined based on materials collected in the research surveys and commercial expeditions, as well as on the data of fishery statistics and literature data. Various biological parameters concerning fisheries have been calculated: instantaneous fishing mortality rate, instantaneous natural mortality rate, von Bertalanffy equation parameters, etc. The decline in stocks is presumably linked to the expanding Laurentian cold spot, as well as to bottom trawl fishing on spawning grounds. It was concluded that since 2002, the fishing pressure on the cod stock was moderate, and fishing mortality did not exceed its target level. However, if the trend of rapid decline in cod stocks continues in the next 3–4 years and the fishing pressure is relatively high, the instantaneous fishing mortality rate may increase. It may exceed the target reference point, and even the limit reference point.
期刊介绍：
The Russian Journal of Marine Biology was founded in 1975 by Alexey V. Zhirmunsky, member of the Russian Academy of Sciences. The Russian Journal of Marine Biology covers a wide range of research and some applied aspects of marine biology as a synthetic science related to various fields of study on marine biota and environment. It presents fundamental research on biological processes at molecular, cellular, organismal, and populational levels in marine organisms. Consideration is given to marine objects as models in life sciences. The journal also publishes papers dedicated to events in Russian and international marine biological science and the history of biology.
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