Abstract
Using Parensky's approach for estimating the number of breeding pairs, we determined effective subpopulation size N e in early-run sockeye salmon Oncorhynchus nerka from Azabach'e Lake (Kamchatka) in 1977 through 1981. On average (over years and populations), biased sex ratio decreased N e by 7% as compared to the number of fish on the spawning sites (N i). High density reduced the N e /N i ratio by 62–66% because some fish were excluded from spawning. Dominance polygyny as compared to monogamy and random union of gametes could reduce N e by about 17%.
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Efremov, V.V., Parensky, V.A. Effective Size of Subpopulations in Early-Run Sockeye Salmon Oncorhynchus nerkafrom Azabach'e Lake (Kamchatka): The Effect of Density on Variance of Reproductive Success. Russian Journal of Genetics 40, 431–436 (2004). https://doi.org/10.1023/B:RUGE.0000024981.15293.00
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DOI: https://doi.org/10.1023/B:RUGE.0000024981.15293.00