Data from: Genetic population structure in prickly sculpin (Cottus asper) reflects isolation by environment between two life history ecotypes

Stefan Dennenmoser, Sean M. Rogers & Steven M. Vamosi
Life-history transitions have evolved repeatedly in numerous taxa, although the ecological and evolutionary conditions favouring such transitions in the presence of gene flow remain poorly understood. The present study aimed to disentangle the effects of isolation-by-distance and isolation-by-environment on genetic differentiation between two sympatric life-history ecotypes. Using 14 microsatellite loci, we first characterized amphidromous and freshwater groups of Cottus asper in a high gene flow setting in the Lower Fraser River system (south-western British Columbia,...
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