Development of a fatted male phenomenon in California sea lions
Article first published online: 19 OCT 2004
Copyright © 1971 John Wiley & Sons, Inc.
Volume 4, Issue 4, pages 333–338, 1971
How to Cite
Schusterman, R. J. and Gentry, R. L. (1971), Development of a fatted male phenomenon in California sea lions. Dev. Psychobiol., 4: 333–338. doi: 10.1002/dev.420040406
- Issue published online: 19 OCT 2004
- Article first published online: 19 OCT 2004
- Manuscript Received: 19 OCT 1970
- sexual maturity;
- gonadal hormones;
- seasonal growth;
- social organization;
- sea lions
A captive colony of male sea lions (Zalophus californianus) living in northern California shows an annual weight fluctuation related to their reproductive season. Seasonal fattening, which is associated with an increase in territorial displays, starts developing at 5 years of age, when a sagittal crest first becomes apparent, and becomes more prominent as the males reach full maturity.