Selection against immigrants in wild seabird populations - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Ecology Letters Année : 2021

Selection against immigrants in wild seabird populations

Résumé

Immigration is a major demographic parameter shaping population dynamics and is an important driver of eco-evolutionary patterns, but the fitness consequences for individuals following their settlement to a new population (immigrants) remain poorly tested in wild animal populations, particularly among long-lived species. Here we show that immigrants have a lower fitness than residents in three wild seabird populations (wandering albatross Diomedea exulans, southern fulmar Fulmarus glacialoides, snow petrel Pagodroma nivea). Across all species and during a 32-year period, immigrants made on average 9 to 29% fewer breeding attempts, had 5–31% fewer fledglings, had 2–16% lower breeding success and produced 6–46% fewer recruits. Female immigration and male residency were also favored through differences in breeding performance. We provide evidence for selection against immigrants in wild populations of long-lived species and our results are consistent with female-biased dispersal in birds being driven by asymmetric limiting resources and the competitive ability of dispersers vs. non-dispersers.
Fichier non déposé

Dates et versions

hal-02971023 , version 1 (19-10-2020)

Identifiants

Citer

Christophe Barbraud, Karine Delord. Selection against immigrants in wild seabird populations. Ecology Letters, 2021, 24, pp.84-93. ⟨10.1111/ele.13624⟩. ⟨hal-02971023⟩
25 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More