Table 1: Bayesian estimates of Fst values for each population. The mean value and the lower and upper limits of the 95% highest probability density interval are indicated. These Fst values measure the differentiation of a given population relative to all other populations.

Population Lineage transect Habitat transect Combined transect 1 0.0078 [0.0038; 0.0123] 0.0522 [0.0357; 0.0695] 0.0721 [0.0524; 0.0934] 2 0.0104 [0.0055; 0.0155] 0.0464 [0.0301; 0.0627] 0.0513 [0.0357; 0.0674] 3 0.0054 [0.0019; 0.0093] 0.0330 [0.0209; 0.0468] 0.0507 [0.0350; 0.0671] 4 0.0097 [0.0049; 0.0151] 0.0148 [0.0071; 0.0228] 0.0148 [0.0075; 0.0223] 5 0.0061 [0.0022; 0.0101] 0.0219 [0.0122; 0.0323] 0.0131 [0.0064; 0.0206] 6 0.0132 [0.0075; 0.0193] 0.0233 [0.0142; 0.0339] 0.0134 [0.0071; 0.0205] 7 0.0090 [0.0044; 0.0139] 0.0122 [0.0060; 0.0190] 8 0.0101 [0.0052; 0.0153] 0.0136 [0.0066; 0.0210]