Growth, Gametogenesis, and Patterns Forming the Diversityof Life Cycle Strategies in Whitespotted Char Salvelinus leucomaenis(Salmonidae) in the Kol River Basin (Western Kamchatka)

Kuzishchin, K.V.; Bush, A.G.; Gruzdeva, M.A.; Malyutina, A.M.; Pavlov, E.D.; Pavlov, D.S.

Авторы: Kuzishchin K.V., Bush A.G., Gruzdeva M.A., Malyutina A.M., Pavlov E.D., Pavlov D.S.
Журнал: Journal of Ichthyology
Том: 62
Номер: 6
Год издания: 2022
Издательство: Pleiades Publishing, Inc.
Местоположение издательства: New York, USA
Первая страница: 1116
Последняя страница: 1136
DOI: 10.1134/S0032945222060145
Аннотация: The structure of the population and the formation of life strategy types in whitespotted char Salvelinus leucomaenis (Pallas, 1814) have been studied in the Kol River basin (Western Kamchatka). The local population is a system of intrapopulation groups, including resident dwarf males, larger riverine rheodromous males and females, and anadromous fish. The differentiation in a generation of whitespotted char takes place for 3–4 years in spawning tributaries at several stages. The process begins in the first summer of life, when the fastest growing underyearlings migrate downstream from the spawning tributary into the main river channel, where they reach sexual maturity by the age of 5–6 years, forming a riverine rheodromous group (type of life strategy). The second stage of differentiation in the whitespotted char generation occurs at the age of 3+ due to differences in the growth rate of individuals. Fast-growing males mature and become dwarf, slow-growing males and females smoltify and form an anadromous group. The final stage of differentiation occurs at age 4+ and is similar to that at age 3+. Dwarf males of whitespotted char in Kamchatka breed only once in their life span. The process of uneven growth rates of individual fish at different ages predetermines the differentiationof the generation of whitespotted char.
Добавил в систему: Кузищин Кирилл Васильевич

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Growth, Gametogenesis, and Patterns Forming the Diversityof Life Cycle Strategies in Whitespotted Char Salvelinus leucomaenis(Salmonidae) in the Kol River Basin (Western Kamchatka)статья Исследовательская статья

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