La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Reintroducing endangered Vancouver Island marmots: Survival and cause-specific mortality rates of captive-born versus wild-born individuals
Auteurs :	Kristen Aaltonen, Auteur ; Andrew A. Bryant, Auteur ; Jeffrey A. Hostetler, Auteur ; Madan K. Oli, Auteur
Type de document :	Article
Dans :	Biological Conservation (142(10) OCT 2009)
Article en page(s) :	2181-2190
Langues:	Anglais
Résumé :	Recovery of the endangered Vancouver Island marmot (Marmota vancouverensis) is contingent upon releases of captive-born marmots into natural habitats. Success of such re-introduction programs largely depends on the ability of released animals to survive in the wild. However, whether and to what extent survival and cause-specific mortality rates of captive-born marmots differ from those of their wild-born counterparts remains unknown. We used radio-telemetry (1992-2007) and mark-resighting (1987-2007) data to estimate seasonal and annual survival rates of the Vancouver Island marmot, to compare survival and cause-specific mortality rates of captive-born marmots that have been released into the natural habitat with those of wild-born marmots, and to test for the effect of age-at-release on survival of the released marmots. Analysis of radio-telemetry data suggested no difference in survival of males versus females. However, annual survival of captive-born marmots released into the wild was low (S = 0.605; 95%

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