BIOLOGIYA MORYA, 2024, Vol. 50, No. 6, pp. 407-416

Assessment of the Effect of Regional Climate Conditions on Abundance of Pink Salmon, Oncorhynchus gorbuscha (Walbaum, 1792) (Salmonidae), in the Sea of Japan in 1980-2023

© 2024 T. A. Shatilina¹, G. Sh. Tsitsiashvili², M. A. Osipova^{2, 3}, T. V. Radchenkova²

¹Pacific Branch, Russian Federal Research Institute of Fisheries and Oceanography (TINRO), Vladivostok 690091, Russia;
²Institute of Applied Mathematics (IAM), Far Eastern Branch, Russian Academy of Sciences, Vladivostok 690041, Russi;
³Far Eastern Federal University, Vladivostok 690022, Russia

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The relationship of catch dynamics of pink salmon Oncorhynchus gorbuscha (Walbaum, 1792) (Salmonidae) from the Sea of Japan with hydrometeorological conditions at the spawning and feeding grounds is studied. The unfavorable conditions for pink salmon runs are an extremely low air temperature during incubation and water temperature during the estuarine-coastal life-history stage. The favorable conditions for pink salmon runs are a high air temperature during incubation and water temperature in the Tatar Strait during downstream migration and the early marine stage. Since 2018, a cooling of waters in the Tatar Strait has been observed, which has affected pink salmon runs to the rivers of Khabarovsk Krai and Primorsky Krai. The shift of dominant year-classes in 1994 occurred under extreme hydrometeorological conditions at all life-history stages of pink salmon in the Sea of Japan.

Key words: pink salmon Oncorhynchus gorbuscha, Sea of Japan, Tatar Strait, water temperature anomalies, shift in dominance.