Abstract
Species composition and abundance of nekton and their interannual variation are considered for the upper epipelagic layer (0-50 m) in the Aleutian and Commander deep-water basins of the western Bering Sea on the data of surveys conducted by Pacific Fish. Res. Center (TINRO) in September-October of 2002-2013. Dominant species were similar for both areas: the most abundant ones were chum salmon Oncorhynchus keta and boreopacific gonate squid Boreoteuthis borealis . Simpson index of domination was higher in the Aleutian Basin and these indices in two areas changed synchronously until 2009 but later they became closer and changed asynchronously. Either chum salmon or the squid dominated usually with some years as exclusion. South-boreal and subtropical species were more abundant in the Commander Basin, in particular in 2006, 2008 and 2012. Year-to-year dynamics of certain species were statistically similar, but its nature was unclear. The total biomass of nekton decreased after the climate regime shift in 2006-2007 from 3241 to 1736 kg/km 2 (in 46 %) in the Aleutian Basin and from 2459 to 1976 kg/km 2 (in 20 %) in the Commander Basin.
Highlights
Ключевые слова: западная часть Берингова моря, верхняя эпипелагиаль, нектон, видовая структура, доминирование, тихоокеанские лососи, климатический режимный сдвиг
Species composition and abundance of nekton and their interannual variation are considered for the upper epipelagic layer (0–50 m) in the Aleutian and Commander deep-water basins of the western Bering Sea on the data of surveys conducted by Pacific Fish
Dominant species were similar for both areas: the most abundant ones were chum salmon Oncorhynchus keta and boreopacific gonate squid Boreoteuthis borealis
Summary
По материалам комплексных исследований ТИНРО-центра, проводимых в верхней эпипелагиали (0–50 м) глубоководных котловин западной части Берингова моря в сентябреоктябре 2002–2013 гг., были рассмотрены особенности видовой структуры нектона, в том числе в межгодовом аспекте. Somov A.A. Composition, structure, and dynamics of nekton in the upper epipelagic layer in the Aleutian and Commander Basins of the western Bering Sea in the fall periods of 2002–2013 // Izv. TINRO. Species composition and abundance of nekton and their interannual variation are considered for the upper epipelagic layer (0–50 m) in the Aleutian and Commander deep-water basins of the western Bering Sea on the data of surveys conducted by Pacific Fish. Основная цель настоящего исследования — описание динамики и особенностей видового состава и структуры нектона верхней эпипелагиали глубоководных котловин западной части Берингова моря в осенний период 2002–2013 гг
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
