Data from: Patterns of intra- and inter-population genetic diversity in Alaskan coho salmon: implications for conservation

Little is known about the genetic diversity of coho salmon in Alaska, although this area represents half of the species' North American range. In this study, nine microsatellite loci were used to genotype 32 putative coho salmon populations from seven regions of Alaska. The primary objectives were to estimate and evaluate the degree and spatial distribution of neutral genetic diversity within and among populations of Alaskan coho salmon. Genetic analysis yielded four results that provide insight into forces influencing genetic diversity in Alaskan coho salmon and have important conservation implications: 1) significant population differentiation was found within each region; 2) the degree of differentiation (FST = 0.099) among populations was as large or larger than that reported for other Pacific salmon species in Alaska; 3) phenetic clustering of populations showed weak geographic concordance; 4) strong genetic isolation by distance was only apparent at the finest geographic scale (within a drainage). These results suggest that coho salmon populations are small relative to populations of other Pacific salmon, and the genetic diversity within and among coho salmon populations is influenced primarily by genetic drift, and not gene flow. Resource management and conservation actions affecting coho salmon in Alaska must recognize that the populations are generally small, isolated, and probably exhibit local adaptation to different spawning and freshwater rearing habitats. These factors justify managing and conserving Alaskan coho salmon at a fine geographic scale.Alaskan coho salmon genotypesGenotype data from nine microsatellite loci for 2584 coho salmon in 32 locations in Alaska. This data file is formatted for use in the computer program GenePop v4.0. The genotypes in this file have NOT been standardized with other laboratories -- see readme file for further information.c32p9lTable 1Location, site abbreviation (Abbr), sample year, sample size (n), and life stage (A = adult, J = juvenile) of fish sampled from 32 putative coho salmon populations in seven regions of Alaska