Barking, Dominance, and Territoriality in Male Sea Lions

Science  26 Apr 1968:
Vol. 160, Issue 3826, pp. 434-436
DOI: 10.1126/science.160.3826.434


Experiments in which male sea lions (Zalophus californianus) were removed and reintroduced into a social group demonstrate that barking by larger males restricts movement and barking by other smaller males. Barking and aggression were primarily directed toward animals of most nearly equal size. Two 6-year-olds seeking to establish and maintain territorial status used aggressive tactics similar to those observed in breeding males in the field.