Abstract
Based on the results of identification of marked fish in samples from catches in rivers and coastal areas, the proportion of pink salmon Oncorhynchus gorbuscha marked at the hatchery «Pugachevsky», «Bakhura» and «Anivsky» in approaches to different areas of the eastern coast of Sakhalin Island was calculated probable abundance, survival rates and indexes commercial removals of marked fish in 2018. Extrapolation of the results of the study of commercial and biological indicators of marked pink salmon to the unmarked part of the factory herd allows us to consider that the total number of returns of factory pink salmon to eastern Sakhalin waters in 2018 amounted to 1,5 million fish. The coastal fishery was catch 0,8 thousand tons of pink salmon of artificial reproduction.
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