La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Breeding biology and population increase of the Endangered Bermuda Petrel Pterodroma cahow
Auteurs :	Jeremy Madeiros, Auteur ; Nicholas Carlile, Auteur ; David Priddel, Auteur
Type de document :	Article
Dans :	Bird Conservation International (22(1) MAR 2012)
Article en page(s) :	35-45
Langues:	Anglais
Résumé :	The Bermuda Petrel Pterodroma cahow was thought to have become extinct early in the 17(th) century due to a combination of hunting by human colonists and predation by introduced rats, cats, dogs and pigs. However, single individuals were found on four occasions during the first half of the 20(th) century, and in 1951 a small population was discovered breeding on several rocky islets in north-east Bermuda. Recovery actions began in 1962 when the population numbered just 18 pairs, dispersed among five small islets. Although rats extirpated one of these five colonies in 1967, the population has grown steadily to 56 breeding pairs in 2000. We investigated the breeding phenology, productivity and population size of the Bermuda Petrel between 2000/2001 and 2007/2008. Each year, the birds began arriving in Bermuda around mid-October. They departed on a pre-breeding exodus between 19 November and 14 December, returning after 32-56 days to lay a single egg between

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