Impact of abnormal oceanographic conditions on distribution and fishery of japanese sardine in Kuril waters in 2025
https://doi.org/10.26428/1606-9919-2026-206-316-330
EDN: RQASYF
Abstract
Dramatic change in patterns of the japanese sardine feeding migration in 2025 had a decisive impact on the Russian fishery in Far East and caused a sharp decrease of annual catch. It was reasoned by anomalous oceanographic conditions in spring of this year, with the strong Oyashio Current, poor advection of transformed subtropical water mass with the warm anticyclonic eddy into the South Kuril fishing zone, and accordingly delayed warming of the surface layer there in the southernmost corner of the exclusive economic zone of Russia. The conditions favorable for sardine migration to this area developed too late, that’s why their feeding schools either remained within the Japanese EEZ or migrated northeastward and eastward to the open ocean, too far from the Russian coasts.
Keywords
japanese sardine,
sardine-iwashi,
sea surface temperature,
fishery,
South Kuril fishing zone,
oceanographic conditions
Supporting agencies: The authors are sincerely grateful to their colleagues from TINRO who collected the data on japanese sardine in trawl surveys and aboard fishing vessels.
About the Authors
D. V. Antonenko
Pacific branch of VNIRO (TINRO)
Russian Federation
Russian Federation
Dmitry V. Antonenko, Ph.D., head of sector
4, Shevchenko Alley, Vladivostok, 690091
Yu. V. Novikov
Pacific branch of VNIRO (TINRO)
Russian Federation
Russian Federation
Yury V. Novikov, chief specialist
4, Shevchenko Alley, Vladivostok, 690091
E. V. Samko
Pacific branch of VNIRO (TINRO)
Russian Federation
Russian Federation
Evgeny V. Samko, Ph.D., deputy head of laboratory
4, Shevchenko Alley, Vladivostok, 690091
E. I. Ustinova
Pacific branch of VNIRO (TINRO)
Russian Federation
Russian Federation
Elena I. Ustinova, Ph.D., leading researcher
4, Shevchenko Alley, Vladivostok, 690091
E. O. Basyuk
Pacific branch of VNIRO (TINRO)
Russian Federation
Russian Federation
Evgeny O. Basyuk, leading specialist
4, Shevchenko Alley, Vladivostok, 690091
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For citations:
Antonenko D.V., Novikov Yu.V., Samko E.V., Ustinova E.I., Basyuk E.O. Impact of abnormal oceanographic conditions on distribution and fishery of japanese sardine in Kuril waters in 2025. Izvestiya TINRO. 2026;206(2):316-330. (In Russ.) https://doi.org/10.26428/1606-9919-2026-206-316-330. EDN: RQASYF
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