Effective Size of Subpopulations in Early-Run Sockeye Salmon Oncorhynchus nerka from Azabach'e Lake (Kamchatka): The Effect of Relative Reproductive Success of Different-Year Cohorts

Author： Efremov V. V.  

Publisher： MAIK Nauka/Interperiodica

ISSN： 1022-7954

Source： Russian Journal of Genetics, Vol.40, Iss.5, 2004-05, pp. : 524-528

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Abstract

The effect of variation in reproductive success of cohorts of different year of birth (within generation) on the effective subpopulation (breeding group) size in early-run sockeye salmon Oncorhynchus nerka from Azabach'e Lake (Kamchatka). The annual variation in census size and overlapping of year classes reduced the ratio of the effective subpopulation size to the census size by 7 to 88% in different subpopulations. The total effect of the variance of reproductive success in individual years and the variance of reproductive success of different cohorts reduced the effective size/census size ratio by 68–96%.

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