Biological and economic efficiency of artificial reproduction of autumn chum salmon in the Amur River basin

The paper is devoted to assessing the contribution of artificial reproduction to replenishment of commercial resources of autumn chum salmon and assessing the economic efficiency of its reproduction in the Amur River basin. The research results show that, according to otolith marking data, the share of artificially produced fish in 2019–2023 was 31,0–33,2%, which indicates a significant impact of artificial reproduction on the formation of commercial stocks of autumn chum salmon in the Amur River basin. The economic efficiency of the salmon fish hatcheries (SRH) of the Amur branch of Glavrybvod was assessed; the costs of maintaining the fish hatchery system are many times (6,2–8,2 times) lower than the possible gross revenue from the sale of returnable fish. It is recommended to maintain the level of artificial reproduction of autumn chum salmon at least in the volumes of the capacities of existing state SRH.