Small-scale dispersal and survival in a long-lived seabird, the wandering albatross.

摘要: 1. Dispersal is a fundamental but still poorly known process in population dynamics and several hypotheses have been proposed to explain its patterns. We studied natal breeding dispersal survival long-lived seabird, the wandering albatross (Diomedea exulans L.), examined concerning patterns birds. 2. applied multi-state capture-recapture models 36-year data set (1969-2004) collected at three colonies on Ile de Possession, Crozet Islands. Because species has biennial reproduction, we introduced unobservable states model account for absence of individuals those years. 3. Adults were highly faithful their nesting colony fidelity, as well rate, differed slightly among (fidelity ranged from 0.957 0.977). Breeding fidelity was highest where lowest not more likely change following failed attempt than after successful one. The that attracted most dispersers had density 4. Philopatry (the probability young return breed birth site) generally high variable (ranging 0.70 0.92), little. largest colony, availability potential mates presumably greatest. However, dispersing individuals, recruits. 5. Although size influenced decision stay or leave young, influential selection new both adult dispersers. Our results support hypothesis philopatry strategy favoured by recruits conspecific attraction can variation level settlement individuals.