Supplements to the generalized quantitative assessments of benthic macrofauna in the Far-Eastern Seas and adjacent waters of the Pacific Ocean. Report 2. Regional and bathymetric features of biomass and density of its distribution for fish and some groups of invertebrates

• 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 2016
• Subjects: макрофауна бентали; плотность концентраций; донные рыбы и беспозвоночные; биомасса; батиметрические диапазоны; Aquaculture. Fisheries. Angling; SH1-691; Bering Sea; Okhotsk; Pacific; Kamchatka; okhotsk sea
• Online Access: https://doi.org/10.26428/1606-9919-2016-186-32-60; https://doaj.org/article/3b5981312da44dc2b978939472eab067

Data on mean annual biomass (t) of the bottom macrofauna groups and main species in the Far-Eastern Seas and adjacent waters of the Pacific Ocean, by bathymetric ranges, and on density of their distribution (t/km2) are summarized. The average density of distribution for bottom and demersal fish varies from 5.8 to 26.9 t/km2 in the range 0-200 m, from 8.6 to 26.9 t/km2 in the range 200-500 m, from 3.6 to 14.7 t/km2 in the range 500-1000 m, and from 3.4 to 15.7 t/km2 in the range 1000-2000 m. The average density for bottom invertebrates varies within 4.0-12.6, 4.7-19.6, 1.7-10.2, and 0.6-3.0 t/km2, respectively. The density usually increases in the transitional zone between the continental shelf and a slope (200-500 m). Aggregations of total macrofauna are the densest in this bathymetric range and reach 32.3 t/km2 in the Bering Sea, 15.2 t/km2 in the Japan Sea, and 41.4 t/km2 in the Pacific waters at Kuril Islands. However, the concentrations in this zone in the Okhotsk Sea (maximum 13.3 t/km2) and the Pacific waters at Kamchatka (31.5 t/km2) are lower than that ones on the continental shelf.