Little Gene Flow from a Hatchery Strain of Chum Salmon to Local Wild Populations

Larry L. LeClair Washington Department of Fish and Wildlife, 600 Capitol Way North, Olympia, Washington, 98501–1091, USA

Stevan R. Phelps Washington Department of Fish and Wildlife, 600 Capitol Way North, Olympia, Washington, 98501–1091, USA

Tim J. Tynan Washington Department of Fish and Wildlife, 600 Capitol Way North, Olympia, Washington, 98501–1091, USA

Abstract

We used allozyme data gathered from 13 polymorphic gene loci to examine the genetic impact of a hatchery strain of chum salmon Oncorhynchus keta on nearby wild populations. Genetic distances between the hatchery population and multiple-year samples from each of 10 wild populations were computed. There did not appear to be any trend over time toward decreased genetic distance, and G-test comparisons of allele frequencies indicated significant heterogeneity between the hatchery and nearby wild populations. Allozyme data are useful for examining historical relationships among populations and can provide a rational basis for evaluating the influence of hatchery-produced fish on nearby wild stocks.

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Little Gene Flow from a Hatchery Strain of Chum Salmon to Local Wild Populations

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Little Gene Flow from a Hatchery Strain of Chum Salmon to Local Wild Populations

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