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首页> 外文期刊>Russian journal of marine biology >The Long-Term Dynamics of Sablefish (Anoplopoma fimbria) Stocks in the Western Bering Sea and Prospects for their Commercial Exploitation
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The Long-Term Dynamics of Sablefish (Anoplopoma fimbria) Stocks in the Western Bering Sea and Prospects for their Commercial Exploitation

机译：The Long-Term Dynamics of Sablefish (Anoplopoma fimbria) Stocks in the Western Bering Sea and Prospects for their Commercial Exploitation

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The dynamics of sablefish stocks and fishery in the Bering Sea, the Gulf of Alaska, and off the Aleutian Islands are considered based on the data of bottom and midwater trawl surveys conducted by TINRO in 2003-2020, fishing statistics, and open-access data of the National Oceanic and Atmospheric Administration, United States. The sharp increase in biomass and annual catches of this fish in the Bering Sea in recent years is caused by the emergence of several strong year-classes. Similar processes are observed both in the eastern and western Bering Sea, which is explained by the fact that the stocks in the latter region are supported by recruitment from the major breeding grounds. Two main types of external recruitment to sablefish stocks in the western Bering Sea have been identified. The main pathway of recruitment in the Western Bering Sea fishery zone is the active migration of juveniles, which have already changed to benthic life, from the breeding grounds in the southeastern Bering Sea. The second pathway is the passive transport of larvae and fry with the system of surface currents across the Bering Sea. This process has a major effect on the sablefish recruitment in bays of the northeastern and, to a lesser extent, the eastern Kamchatka coast. The target longline fishery accounted for only 7 of the annual sablefish catches in the Western Bering Sea fishery zone in 2010-2020. The largest part (93) of sablefish were mostly by-caught in the trawl and longline fishery for other species of aquatic biological resources. The basic reference points for managing the sablefish fishery in the Western Bering Sea fishery zone are estimated. With the current level of stocks in this zone, catching approximately 400 t of sablefish annually is allowed. This value includes 100-120 t that will inevitably be by-caught during fishing for other commercial species, while the remaining 280-300 t is the expected resource for the targeted sablefish fishery.

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