La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Factors affecting nesting success of a bird assembly in the central Monte Desert, Argentina
Auteurs :	E. T. Mezquida, Auteur ; L. Marone, Auteur
Type de document :	Article
Dans :	Journal of Avian Biology (32(4) DEC 2001)
Article en page(s) :	287-296
Langues:	Anglais
Résumé :	We estimated nesting success of a breeding bird assemblage in the central Monte Desert in four breeding seasons (1995-1999). We analyzed the effect of year, period within the breeding season, nest type, and nest location on daily survival rates (DSR). Averaged nesting success of passeriforms in natural habitats was very low (90% on average, n=12 species). DSR differed among years, being higher in the driest year (1995) and lower in the most humid year (1997). Nests initiated in the first half of the breeding season had higher DSR than those initiated in the second half. Closed nests had similar survival rates to open nests. DSR differed according to species of plant that supported the nest. Nest predation in the central Monte Desert may be an important selective pressure in birds' life history, which is in accordance with other results for South American temperate birds.

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