Comparative foraging behaviour of sympatric Humboldt and Magellanic Penguins reveals species-specific and sex-specific strategies

摘要: How closely related marine organisms mitigate competition for resources while foraging at sea is not well understood, particularly the relative importance of interspecific and intraspecific mitigation strategies. Using location time–depth data, we investigated species-specific sex-specific areas diving behaviour Humboldt (Spheniscus humboldti) Magellanic (S. magellanicus) Penguins breeding in sympatry Islotes Punihuil southern Chile during chick-rearing period. The average duration trips was <20 h did differ significantly between species or sexes each species. made deeper longer dives than Penguins. Males both females. Total distance travelled per trip greater males females, females more direct (less sinuous) males. Foraging effort concentrated waters up to 15 km west south-west colony. overlap density contours lower within a In general, dive characteristics differed contrast findings studies flying seabirds, these penguins differs sexes.