La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Reproductive success and pairing in Hawaiian Geese (Branta sandvicensis) in relation to age and body size
Auteurs :	F. Woog, Auteur
Type de document :	Article
Dans :	Journal of Ornithology (143(1) JAN 2002)
Article en page(s) :	43-50
Langues:	Anglais
Résumé :	The effect of age and size, and partner age and size combinations on reproductive success in Hawaiian Geese (Branta sandvicensis) were examined. Clutch size and the number of eggs hatched increased initially with age in males and females, then levelled off and declined in older birds. Some older females, however, had large clutches and hatched a high proportion of young. The number of eggs hatched increased initially with pair duration, but decreased later, which may be attributable to the advanced age of at least one of the partners. Young and old females performed best with middle-aged partners, possibly because middle-aged males had a higher reproductive success than younger or older males. Young males-may be less experienced and old males may have become senescent. Body size did not affect reproductive success.

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