Assessment of hypotheses about dispersal in a long-lived seabird using multistate capture–recapture models

摘要: Summary 1. Dispersal contributes to spatio-temporal variation in population size and is a key process studies of life history evolution with conservation implications. However, dispersal still one the major gaps our knowledge ecological dynamics. The very large literature on metapopulation dynamics lacks empirical bases relevant behavioural parameters. We used multistate capture‐ recapture models (data from 1988 2001) address hypotheses about movement probability habitat selection within system two breeding colonies Audouin’s gulls ( Larus audouinii ), an endemic species Mediterranean considered as threatened. 2. Movement varied over time, differed greatly between colonies. 3. did not find evidence influence colony or density predators probability. 4. In dispersers, results support that year t + 1 was influenced by mean success origin (i.e. indicator quality) destination 1, ratio these quality gradient). 5. Overall, higher smaller larger, lower more productive one. This provides slight for nonexclusive (conspecific attraction conspecific attraction). 6. smaller, less high some years, suggesting both were strongly adult dispersal. absolute numbers, individuals moved suggests may function source‐sink system. 7. Use re-assess local survival showed emigration reflect genuine differences mortality colonies, probably permanent study area.