Population Structure and Stock Identification of Chum Salmon (Oncorhynchus keta) Based upon Microsatellite Analysis

摘要

Stock identification of chum salmon (Oncorhynchus keta) migrating through particular locations on the high seas can be of scientific and management interest. Although allozyme-based methods of stock identification have proven useful in estimation of chum salmon stock composition in mixed-stock fisheries (Shaklee et al. 1999), and differentiation at allozyme loci occurs among chum salmon (Beacham et al. 1987; Seeb and Crane 1999), the level of discrimination available in some applications is not sufficient for fisheries management decisions. Variation in microsatellite loci has been applied in other species requiring discrimination among salmonid populations within watersheds (Small et al. 1998; Beacham and Wood 1999; Beacham et al. 2001), and has been shown to be useful in stock discrimination in chinook salmon (Banks et al. 2000).