FEATURES OF EXPERIMENTAL CULTIVATION OF BIVALVE MOLLUSKS IN POLYCULTURE IN TAUISK BAY, SEA OF OKHOTSK
The analysis of the bivalve mollusks' growth: blue mussels, long-necked clams and macomas, growing in polyculture with different stocking density (biomass) (30-70 kg/m<sup>2</sup>) in cages located from 1 to 5,5 m below the sea surface, was carried out. The maximum increases in length and mass of mollusks were recorded in cages with biomass of 30 and 50 kg / m<sup>2</sup> at a depth of 1-3,5m. Mollusks grew more slowly in cages with a density of 70 kg/m<sup>2</sup> at a depth of 5-5,5 m. Maximum increases in shell length (4,9-7 mm) were noted in blue mussels, and weight gains (5,6-7,7 g) were observed in long-necked clams. The highest percentage of elimination was observed in blue mussels, 7,1-12,8%, and the lowest in macomas, 1,5-2,6%. The efficiency of cultivation of various types of bivalve mollusks in polyculture in the northern part of the Sea of Okhotsk is shown.