Age-related spatial ecology of Audouin’s gull during the non-breeding season
Rattachement africain : es, pt. Niveau de preuve : code pays fourni par la source.
Le résumé fourni par la source
Abstract Relationships between individual’s age and the movement ecology and habitat preference of long-lived migratory birds still remain understudied. According to the exploration-refinement hypothesis it is thought that adults would select better and more productive areas for foraging than inexperienced juvenile birds would do. Additionally, age-related differences in migratory patterns and exploited habitats could be explained by the attempt to avoid competition between juveniles and adults. Here, we explored the differences in the migratory patterns, habitat selection and foraging behaviour between juvenile and adult Audouin’s gulls ( Ichthyaetus audouinii ), a species listed as vulnerable by the IUCN. We captured 9 juveniles and 8 adults in the colony of San Pedro (SE Spain) and equipped them with high-resolution 5-min programmed GPS to track their postnuptial/first migration and non-breeding destinations. First, juveniles tended to migrate longer distances than adults did. Second, the time spent foraging between age groups did not differ. Third, freshwater masses constituted an essential habitat during the non-breeding season for both juveniles and adults. Fourth, we found that adults used a greater variety of habitats than juveniles did, but adults positively select foraging habitats despite the low availability while juveniles do not. Finally, repeatability in habitat use of individuals of the same age was rather low. We provided evidence of age-related differences in migratory patterns and habitat exploitation during the non-breeding period in a migratory seabird which can be explained by the avoidance of competition between adults and juveniles and the greater experience in foraging performance that adults have in comparison with juveniles.
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Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- Age-related spatial ecology of Audouin’s gull during the non-breeding season
- Date Crossref
- 24/10/2023
- Éditeur
- openRxiv
- Type
- posted-content
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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University of the Basque Country pays non établi dans la noticeUniversité ou école supérieure
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Universidade do Porto pays non établi dans la noticeUniversité ou école supérieure
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Universitat de Barcelona pays non établi dans la noticeUniversité ou école supérieure
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Asociación de Naturalistas del Sureste pays non établi dans la noticeOrganisation à but non lucratif
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BIOPOLIS Program in Genomics pays non établi dans la noticeInstitution
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University of Porto Laboratório Associado pays non établi dans la noticeUniversité ou école supérieure
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Departamento de Biología Vegetal y Ecología pays non établi dans la noticeInstitution
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Departament de Biologia Evolutiva pays non établi dans la noticeInstitution
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Institut de Recerca de la Biodiversitat (IRBio) pays non établi dans la noticeStructure de recherche
University of the Basque Country, Universidade do Porto et Universitat de Barcelona, avec 6 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.