Breeding habits, growth and stomach contents of the Steller sea lion in Alaska
Mathisen OA, Baade RT, Lopp RJ. 1962. Breeding habits, growth and stomach contents of the Steller sea lion in Alaska. Journal of Mammalogy. 43(4):469-477
Steller sea lions (Eumetopias jubata) were observed from May to July. Harem boundaries were indistinct, and the size of a harem varied from day to day as did the number of unattached males near a harem. Copulation was observed 31 May to 10 July, parturition from 24 May to 27 June. A cow nursed only her own pup or yearling. Harem groups slowly disbanded as pups learned to swim. Lengths of pups, yearlings, cows and bulls are summarized. Only non-commercial fishes, with the exception of one pink salmon, were found in 114 stomachs. Invertebrates were more frequent than fishes.
- Type
- Journal Article
- Authors
- Mathisen, Ole; Baade, Robert; Lopp, Ronald
- Units
- GLBA , KLGO , SEAN , SITK
- Keywords
- Animal Communities (Wildlife), Behavior, Breeding Biology, Chernabura Island, Coastal/Marine Systems, Feeding, food habitats, Forage Fish, Growth, Mammal, Mammals, Marine, Marine Mammal, Marine Mammals, nursing, Physiology, Prey Species, pupping, Reproduction, sea lion, Seals, Shumagin Islands, Steller Sea Lion, Steller's Sea Lion