Table 1.
Demographic information of the odontocete species for which DNA methylation data were available.
| Species | Common name | Origin | Na | No. animals | No. female | Mean age | Median age | Minimum age | Maximum age |
|---|---|---|---|---|---|---|---|---|---|
| Cephalorhynchus commersonii | Commerson’s dolphin | Zoo born | 6 (3) | 3 | 1 | 22.4 | 21.3 | 18.6 | 27.5 |
| Wild | 1 (1) | 1 | 0 | 36.1 | 36.1 | 35.1 | 37.0 | ||
| Delphinapterus leucas | Beluga | Zoo born | 65 (48) | 42 | 20 | 9.8 | 8.0 | 0.15 | 27.3 |
| Wild | 35 (17) | 19 | 11 | 27.9 | 32.5 | 1.2 | 49.2 | ||
| Delphinus delphis | Common dolphin | Wild | 6 (3) | 3 | 2 | 14.8 | 14.8 | 2.6 | 26.2 |
| Globicephala macrorhynchus | Short-finned pilot whale | Wild | 15 (9) | 7 | 3 | 16.1 | 8.8 | 6.5 | 55.3 |
| Lagenorhynchus obliquidens | Pacific white-sided dolphin | Zoo born | 26 (13) | 14 | 7 | 9.0 | 7.4 | 0.4 | 19.8 |
| Wild | 8 (4) | 4 | 4 | 34.0 | 31.9 | 31.9 | 40.4 | ||
| Orcinus orca | Killer whale | Zoo born | 56 (29) | 30 | 17 | 15.7 | 13.9 | 0.26 | 30.9 |
| Wild | 32 (7) | 26b | 19 | 22.9 | 21.0 | 0 | 54.6 | ||
| Phocoena phocoena | Harbor porpoise | Wild | 2 (1) | 1 | 1 | 17 | 17 | 17 | 17 |
| Steno bredanensis | Rough-tooth dolphin | Wild | 12(6) | 6 | 4 | 13.6 | 14.6 | 4.6 | 24.0 |
| Tursiops truncatus | Bottlenose dolphin | Zoo born | 160 (123) | 120 | 81 | 16.5 | 14.5 | 0.57 | 40.7 |
| Wild | 21(17) | 17 | 11 | 35.0 | 36.4 | 3.9 | 58.0 |
aTotal number of samples used for clock development, number of blood samples in parenthesis.
bTotal number of animals includes 19 samples from wild Norwegian killer whales of unconfirmed sex (unless mature) that were used in clock development.