Monitoring survey on run of spawners of pink salmon Oncorhynchus gorbuscha by means of UAV in the spawning rivers of Sakhalin Island in 2022

Monitoring of pink salmon (Oncorhynchus gorbuscha) migration to the estuaries and spawning grounds in the rivers of southeastern and southwestern Sakhalin, including the Aniva Bay, was conducted in summer 2022 using a no-tipping technique with unmanned aerial vehicles (UAV). Abilities, advantages and disadvantages of UAV use for such surveys are discussed to provide a scientific basis for improved management of salmon fishery in the Far East of Russia.