Spearman’s rank correlation coefficients of pairwise comparisons of genome-wide FST values (A). Correlation coefficients were calculated between solitary populations with the lowest and highest proportions of benthic diet (allopatric, as exemplified in C), benthic-limnetic species pairs (sympatric, as exemplified in B) and among solitary populations and benthic-limnetic species pairs (allopatric vs. sympatric). All pairwise FST comparisons between solitary populations contained four different lakes (e.g., Amor-Little Goose vs. Lower Campbell-Muskeg).