Vocal rates and social context in male south American sea lions

Abstract

During the breeding season reproductively active South American sea lion males (Otaria fivescens) compete aggressively against other males to defend a(Otaria fivescens) compete aggressively against other males to defend a position along the shoreline, where most females group (Campagna and Le Boeuf 1988a). Vocalizations are a conspicuous component of male behavior: high pitched calls...