Figure 2.

UPGMA tree showing the relationships of sturgeon populations (POPTREE2; Takezaki et al. 32). Genetic distances (F_ST) between the populations (Latter 101) were estimated using allele frequency data for 123 loci. Bootstrap values are indicated next to corresponding nodes. GUE_azov, Acipenser gueldenstaedtii from the Azov Sea; GUE_ur, A. gueldenstaedtii from the Ural River; GUE_vol, A. gueldenstaedtii from the Volga River; PERS, A. persicus; BAE, A. baerii. (The Ural and Volga River sturgeons are considered to be representative of Caspian Sea Russian sturgeons.)