Water masses and fish communities in north-western part of the Bering Sea and western part of the Chukchi Sea in 2003–2010
2018
Khen, G.V. | Basyuk, E.O. | Kivva, K.K.
Water mass and some species of commercial fish distribution in north-western part of the Bering Sea and western part of the Chukchi Sea in 2003, 2007, 2008, and 2010 were studied. Pelagic and benthic fish concentrations are reviewed in comparison with corresponding water layers. Six water masses were distinguished in total. Four of them were observed both in the Bering Sea and in the Chukchi Sea; the remaining two water masses are formed in each sea separately. Bering Sea coastal water mass (BCW)predominates in the surface layer. Desalinated water mass of gulf origin (DGW) is being formed in the inner parts of the Gulf of Anadyr and Norton Sound. Siberian coastal water mass (SCW) is found along Siberian coast of the Arctic Ocean. Bering Sea summer water mass (BSW) is observed along the western shore of the Chirikov Basin. Bottom layer BCW is found off the coast of Alaska only, and BSW predominates in other areas of the Bering Sea and the Chukchi Sea. Small areas of the seas are occupied by Pacific winter water (PWW) and recently ventilated winter water (WW) with a temperature close to the freezing point. Main fish concentrations were found in the Gulf of Anadyr in BCW area (salmons in the surface layer) and in BSW (cod, Pollock, and herring in the bottom layer). In the Chukchi Sea, only few individuals of mature Chum salmon were caught in BCW and SCW areas, and one individual of red salmon and three individuals of Chinook were caught in BCW area.
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