Table 2 Analysis of molecular variance in three different population groupings based on 109 microsatellite markers
Population Groups DefinedComponentsPercentage of Variation
Four groups according to habitat typeAmong groups−1.90
Among populations within groups34.14***
Within populations67.76***
Seven groups according to geographic proximityAmong groups7.35***
Among populations within groups25.65***
Within populations67.00***
Marine vs. freshwater populationsAmong groups−2.05
Among populations within groups33.75***
Within populations68.30***
  • *** P < 0.001. The percentage of genetic variation among groups is indicated by bold type.