Analysis of molecular variance (AMOVA) and spatial analysis of molecular variance (SAMOVA) for cytochrome-<i>b</i> variation in <i>Littorina saxatilis</i>.

In AMOVA, populations were divided into two groups: NWA (Northwest Atlantic) and NEA (Northeast Atlantic mainland) combined with ISL (North Atlantic Islands) or into three groups: NWA, NEA and ISL. In SAMOVA, results are shown for a partitioning that maximized the percentage of total variance explained by variation among groups (see Fig. 4).