Fig. 1: Sampling locations and ancestry of ancient and contemporary bottlenose dolphin individuals.
From: Ancient dolphin genomes reveal rapid repeated adaptation to coastal waters
a Map of sample locations of the four ancient (black triangle) and 60 contemporary coastal (denoted with postscript ‘c’ and shown in shades of red) and pelagic (postscript ‘p’ and in shades of blue) bottlenose dolphins in the eastern North Atlantic (ENAc and ENAp), western North Atlantic (WNAc and WNAp) and eastern North Pacific (ENPc and ENPp). Calibrated radiocarbon-dated the age of the ancient samples is as follows in years before present (BP): NMR10326: 8,518-8,346, NMR2273: 7,745-7,572, NMR10151: 7,228-7,036, SP1060: 5,896-5,723; 'NMR' is not indicated on the figure for readability. b Mandible of a subfossil bottlenose dolphin (sample NMR10326) included in this study. c Principal component (PC) analysis of pseudo-haploid data from four ancient samples projected on the PCs of 60 contemporary samples, mapped to the killer whale (Orcinus orca) reference genome to avoid reference bias and removing transitions, showing first and second PCs based on 624,969 SNPs. The proportion of genetic variance captured by each component is indicated in the axes (see also Figs. S4–S8). d Ancestry proportions of sample SP1060 identified using factorial analysis26. Source data are provided in the Source Data file.
