Fig 1.
Locations of stranded killer whales in the eastern Canadian Arctic (ECA) and Northwest Atlantic (NWA) included in this study (specimen ID numbers match those presented in Table 1).
Table 1.
Stranding location and other data (estimated age, sex, and body length) of killer whale (Orcinus orca) ecotypes from the eastern North Pacific (ENP) and killer whales from the eastern Canadian Arctic (ECA) and Northwest Atlantic (NWA) included in this study.
Fig 2.
δ15NPhe (circles) and δ15NGlx (squares) of eastern North Pacific (ENP) killer whale ecotypes (fish-eating residents and mammal-eating transients) and eastern Canadian Arctic/Northwest Atlantic (ECA/NWA) killer whales with tooth wear and no tooth wear (error bars = standard deviation).
Similar relative differences in δ15NGlx-Phe among the ECA/NWA groups as the ENP ecotypes suggest similar dietary divisions.
Table 2.
Bulk δ15N and δ13C values and phenylalanine (Phe), glutamic acid/glutamine (Glx), and threonine (Thr) δ15N values (‰) measured in dentine collagen of killer whale (Orcinus orca) ecotypes from the eastern North Pacific (ENP), and killer whales from the eastern Canadian Arctic (ECA) and Northwest Atlantic (NWA) with unknown diets.