Chum salmon Oncorhynchus keta (Walbaum) on the continental coast of the Okhotsk Sea. Communication 2. The juveniles

• Published in: Izvestiya TINRO
• Main Author: S. L. Marchenko
• Format: Article in Journal/Newspaper
• Language: Russian
• Published: Transactions of the Pacific Research Institute of Fisheries and Oceanography 2023
• Subjects: кета oncorhynchus keta; покатная миграция; биологическая характеристика; внутривидовая структура; охотское море; Aquaculture. Fisheries. Angling; SH1-691; Keta; Okhotsk; okhotsk sea
• Online Access: https://doi.org/10.26428/1606-9919-2022-202-774-792; https://doaj.org/article/8ddb1df4c78541a896d289aeaacbf8e0

Long-term data on downstream migration, qualitative and quantitative characteristics and feeding of juvenile chum salmon are generalized for the continental coast of the Okhotsk Sea. The downstream migration begins in conditions of certain heating of river waters; its dynamics depends on the rate of water flow and other environmental factors. The juveniles migrate from rivers to the coastal waters both in the daytime and at night. Their qualitative characteristics change in correspondence with escapement of either summer or autumn races of chum salmon progeny from the spawning grounds. The juveniles stay in the coastal waters until September. Their food spectrum is determined by the inhabited biotope.