Migration Patterns and Phenotypic Diversity of Underyearlings
of Sockeye Salmon Oncorhynchus nerka
in the Ozernaya River Basin (Kamchatka)
E. A. Kirillova*, P. I. Kirillov, D. S. Pavlov, and A. O. Zvezdin
Translated by A. Lisenkova
Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, Moscow, Russia
Correspondence to: *e-mail: ekirillova@sevin.ru
Received 27 February, 2017
Abstract—Migratory behavior, size composition, and feeding patterns of the underyearlings of sockeye salmon Oncorhynchus nerka from different intraspecific phenotypic groups in the Ozernaya River basin are studied. Complex organization of main phenotypic groups is demonstrated: several labile spatial-temporal groups are defined within them. The discovered phenotypic polymorphism is temporal and manifested by the sockeye salmon underyearlings only during the period in which they reach the main rearing grounds.
Keywords: sockeye salmon Oncorhynchus nerka, underyearlings, distribution, downstream migration, phenotypic diversity, Ozernaya River, Lake Kurilskoye
DOI: 10.1134/S0032945217060091