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Comparative Characteristic of the Biological Structure, Stock Status, and Commercial Fishing Use of Pacific Salmons (Oncorhynchus, Salmonidae) of the Magadan Region in the end of the 20th and Early 21st Centuries
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Comparative Characteristic of the Biological Structure, Stock Status, and Commercial Fishing Use of Pacific Salmons (Oncorhynchus, Salmonidae) of the Magadan Region in the end of the 20th and Early 21st Centuries
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Comparative Characteristic of the Biological Structure, Stock Status, and Commercial Fishing Use of Pacific Salmons (Oncorhynchus, Salmonidae) of the Magadan Region in the end of the 20th and Early 21st Centuries
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Journal Article
Comparative Characteristic of the Biological Structure, Stock Status, and Commercial Fishing Use of Pacific Salmons (Oncorhynchus, Salmonidae) of the Magadan Region in the end of the 20th and Early 21st Centuries
2021
Overview
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The article presents information on the long-term behavior of biological indicators and returns and catches of three species of the Pacific salmon, namely, pink salmon (
Oncorhynchus gorbuscha
), chum salmon (
O. keta
), and coho salmon (
O. kisutch
) for two conditional periods of the end of the 20th century and beginning of the 21st century. A number of changes occurred in the structure of biological indicators during the specified periods of time. There was a synchronous decrease observed in length, body weight, and fecundity in pink salmon, chum salmon, and coho salmon by the end of the second period. Dominant age groups changed in chum salmon and coho salmon, while age of both species increased. Characteristics of the dynamics of pink salmon returns were identified for two major capture fisheries areas, Shelikhov Gulf and Taui Bay. They fluctuated in antiphase along the even- and odd-year lines at the end of the 20th century; odd-year returns were largely recorded at the beginning of the 21st century. Returns have become strong both for even- and odd-year generations since 2015. The chum and coho salmons returns are on the rise. Taui Bay is noted to have lost its commercial importance as the main harvesting area of the pink and chum salmons.
Publisher
Pleiades Publishing,Springer Nature B.V
Subject
