Adaptations in the breeding of the harbour seal, Phoca vitulina.
D000220:Adaptation, Biological; D000818:Animals; D005075:Biological Evolution; D001955:British Columbia; D002140:California; D010872:Caniformia / Q000502:physiology*; D002980:Climate; D004777:Environment; D004971:Estrus; D005260:Female; D005843:Geography; D008297:Male; D011247:Pregnancy; D011555:Pseudopregnancy; D012098:Reproduction; D012621:Seasons; D014599:Uterus / Q000166:cytology; D014621:Vagina / Q000166:cytology; D014626:Vaginal Smears