Figure 4. A, B in The common bottlenose dolphin (Tursiops truncatus) ecotypes of the western North Atlantic revisited: an integrative taxonomic investigation supports the presence of distinct species

Figure 4. A, B, genetic clustering and relationship of bottlenose dolphins of the western North Atlantic. Membership probabilities of bottlenose dolphins in the western North Atlantic were based on 19 nuclear microsatellite loci and inferred using TESS (A) and STRUCTURE (B). Each column represents one individual, with colours representing the proportional membership to each of the clusters: white, coastal cluster; black, offshore cluster. C, median joining network of mitochondrial DNA haplotypes of bottlenose dolphins of the western North Atlantic. Haplotypes found in samples identified as the coastal ecotype are shown in white and those identified as the offshore ecotype in black. The size of the circles is proportional to the haplotype frequency in each group. Red diamonds indicate either extinct or unsampled haplotypes. Small red numbers on the branches represent the step mutations; branches without numbers represent one step mutation. The unique heteroplasmic haplotypes were not included in this analysis owing to program limitations to deal with ambiguous bases. The haplotype (Ttr2) obtained for the holotype Tursiops erebennus is in red.