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Characteristics of the spawning stock of chinook salmon Oncorhynchus tshawytscha from the Apuka River (northeastern Kamchatka)
Authors:N. V. Klovach  A. N. El’nikov  V. I. Roi
Affiliation:1.Russian Federal Research Institute of Fisheries and Oceanography (VNIRO),Moscow,Russia
Abstract:Biological features of chinook salmon Oncorhynchus tshawytscha from the Apuka River, the largest river of the northeastern Kamchatka inflowing Olyutorskii Bay of the Bering Sea, are studied. Chinook salmon from the Apuka River spend mainly a year in the river before downstream migration to the sea. The fish live in the sea for 1–4 years. The spawning migration of chinook salmon into the Apuka River begins in late May just after ice melting, and it continues until early August. The main part of the spawners enters the river during June. A hypothesis on the occurrence of two seasonal races in the Apuka River is proposed.
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