La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Foraging areas of breeding blue-footed boobies Sula nebouxii in northern Peru, as determined by direction recorders
Auteurs :	Carlos B. Zavalaga, Auteur ; Silvano Benvenuti, Auteur ; Luigi Dall'Antonia, Auteur ; Steven D. Emslie, Auteur
Type de document :	Article
Dans :	Journal of Avian Biology (39(4) JUL 2008)
Article en page(s) :	405-412
Langues:	Anglais
Résumé :	The association between the distribution of blue-footed boobies Sula nebouxii (BFB) and marine productivity around their breeding grounds is unclear. In Peru, they breed in a region seasonally influenced by the cold, nutrient rich Humboldt Current, and by warm, nutrient poor oceanic waters. The foraging range of BFB in Peru is unknown, although some evidence suggest that they may feed in warm offshore waters. During the austral winter 2002 and summer 2003, we tracked 26 BFBs breeding on Isla Lobos de Tierra, Peru (located approximately 15 km west of the mainland), during 59 feeding trips using small direction recorders to determine their marine habitat use. BFBs preferentially moved to the east of the island and foraged over the continental shelf in cold water masses where marine productivity and the abundance of the main prey, the Peruvian anchovy Engraulis ringens, are usually higher than in other areas. Overall, the median maximum foraging distance from the colony was

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