Supplements to quantitative assessments of zooplankton in the Far Eastern Seas and adjacent waters of the North Pacific

• Published in: Izvestiya TINRO
• Main Authors: Vyacheslav P. Shuntov, Igor V. Volvenko
• Format: Article in Journal/Newspaper
• Language: Russian
• Published: Transactions of the Pacific Research Institute of Fisheries and Oceanography 2017
• Subjects: зоопланктон; плотность концентраций; биомасса; вертикальные миграции; суточная; сезонная и межгодовая изменчивость; дальневосточные моря; северная пацифика; zooplankton; abundance; biomass; vertical migration; daily migration; seasonal succession; interannual change; far eastern seas; north pacific; Aquaculture. Fisheries. Angling; SH1-691; Bering Sea; Okhotsk; Pacific; okhotsk sea
• Online Access: https://doi.org/10.26428/1606-9919-2017-191-130-146; https://doaj.org/article/d4f7921e6ce54fb4857108a6fedc12dd

An overview of published and new estimates of zooplankton density and biomass in the Far-Eastern Seas and North-West Pacific with their daily, seasonal and interannual dynamics is presented on the materials of numerous marine expeditions conducted by Pacific Fish. Res. Centre (TINRO) in the 1980-2010s. The mean annual concentration of zooplankton (103 ind./m3) in the epipelagic layer is amounted as 4.386 for the Bering Sea, 3.695 for the Okhotsk Sea, 6.842 for the Japan Sea, and 3.399 for the North-West Pacific, whereas its biomass (g/m3) - 1.079, 0.821, 0.626, and 0.800, respectively. Significant differences are shown for spatial distribution and temporal dynamics of the small-, medium- and large-sized zooplankton abundance and its daily vertical migrations in different areas. Zooplankton stocks in all these regions are evaluated as high; their bulks are formed by large-sized fraction. Interannual fluctuations of the zooplankton abundance could be considerable in certain areas, but its total resource within the Far Eastern basin does not change much: the abundance decline in some areas is compensated by its growth in other ones.