Figure 5 : Genotype-environment association analysis between the five retained environmental variables and a set of 1,320,367 unlinked SNPs in North Atlantic Harbour porpoises, coloured by sampling locality. (a) RDA biplot of the dataset without BLS samples; the overall model was significant (p =0.001), the environmental variables explained 8.5% of the variance. SST, SSS and SCV were significant (b) pRDA biplot of the dataset without BLS, the overall model was also significant (p =0.001), the spatial and environmental variables explained ~5% and ~8% of the variance, respectively. SSS and SCV were significant. sst_Mean (mean sea surface temperature), sss_Mean (mean sea surface salinity), scv_Min (minimum sea current velocity), sca_Min (minimum sea chlorophyll-A concentration) and spp_Min (minimum sea primary productivity).