Titre : | Breeding biology during establishment of a reintroduced Griffon Vulture Gyps hfws population (1996) |
Auteurs : | SARRAZIN François, Auteur ; BAGNOLINI Constant, Auteur ; PINNA Jean-Louis, Auteur ; DANCHIN Etienne |
Type de document : | Article : texte imprimé |
Dans : | Ibis (138 (2)) |
Article en page(s) : | pp. 315-325 |
Langues: | Anglais |
Catégories : |
Thématiques Biologie , Causse , Éthologie , Oiseau , Rapace , Réintroduction , Reproduction , Vautour , Vautour fauve , Zoologie |
Résumé : | We studied the breeding parameters of a reintroduced population of individually marked Griffon Vultures Gyps fulvus in the Grand Causses region of southern France from the time of first reintroduction in 1982 to 1992. Among nesters, 65% of the birds released as immatures or born in the wild recruited into the breeding population when 4 years old, i.e. 1 year earlier than previously described. The proportion of birds nesting each year was relatively high and increased with time, suggesting that conspecific attraction favoured recruitment. We detected a permanent adverse effect of long-term captivity on the nesting success of birds released when more than 2 years old: compared to the natural population, birds which had been kept in captivity showed a reduced breeding success during the whole study period. The breeding success of released immatures and wild-born birds was similar to the highest values observed in a natural population in the Spanish and French Pyrenees. Breeding failures did not usually result in mate change but affected nest-site fidelity. Birds not born in the wild were more likely to recruit to the largest subcolonies available, which highlights the role of social attraction. The observed philopatry of wild-born birds probably resulted from such a social attraction since most of them were born in the largest subcolony. Conspecific attraction maintained the spatial aggregation of nests, whereas nest changes after a breeding failure favoured the spatial expansion of the colony. (Résumé de l'éditeur) |
Note de contenu : | Article disponible en ligne à l'adresse ci-dessous. Également disponible en PDF, s'adresser au centre de documentation et d'archives. |
En ligne : | http://www.researchgate.net/publication/227834387_Breeding_biology_during_establishment_of_a_reintroduced_Griffon_Vulture_Gyps_fulvus_population |
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Code-barres | Cote | Support | Localisation | Section | Disponibilité |
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16052 | DOC EN LIGNE - DOC EN PDF | Périodique | 01 Génolhac | 2 Fonds scientifique | Exclu du prêt |
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