LONG-TERM AVERAGE BIOMASS AND DOMINANT FISH SPECIES IN THE BOTTOM BIOTOPES OF THE OKHOTSK SEA. PART 2. COMPOSITION AND QUANTITATIVE RATIO OF SPECIES AT THE CONTINENTAL SLOPE IN DIFFERENT AREAS OF THE SEA

Abstract

Demersal fish biomass is quantitatively evaluated in the bottom biotopes at the depths to 2000 m at the continental slope of the Okhotsk Sea on the data of 2,545 trawl catches obtained in 1977–2010. The total long-term average biomass is estimated as 3695.9 . 103 t, including 31.6 % of walleye pollock, 19.5 % of giant grenadier, and 13.8 % of greenland halibut (2400.9 . 103 t without pollock). The average density of fish concentration is 3.2 t/km2 without pollock; it is rather uniform by depth: from 2.6 t/km2 for 200–300 m to 3.7 t/km2 for 700–1000 m.

Keywords

• рыбы бентали
• свал глубин охотского моря
• доминирующие виды рыб
• тотальные оценки биомасс рыб