La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Partial nest predation in an altricial bird selects for the accelerated development of young
Auteurs :	K. Halupka, Auteur
Type de document :	Article
Dans :	Journal of Avian Biology (29(2) JUN 1998)
Article en page(s) :	129-133
Langues:	Anglais
Résumé :	In response to disturbance young of altricial open-nesting birds may leave the nest several days before the usual age for nest leaving. In Meadow Pipits Anthus pratensis, about 60% of broods attacked in the last quarter of the nestling period survived predation attempts. The probability that some nestlings would escape from nest predators increased with nestling age. The growth rate and number of nestlings did not predict whether or not the brood would be attacked by a predator. However, the probability that the attack would result in destruction of the entire brood decreased with increasing growth rate. Other sources of mortality (e.g. starvation, scramble competition) also affected slowly growing broods. It is concluded that the selection for accelerated nestling growth and earlier functional maturity acts via elimination of poorly nourished broods.

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