La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Unusual incubation rhythms the Spotted Barbtail, Premnoplex brunnescens
Auteurs :	Harold F. Greeney, Auteur
Type de document :	Article
Dans :	Journal of Ornithology (150(3) JUL 2009)
Article en page(s) :	529-535
Langues:	Anglais
Résumé :	The Spotted Barbtail (Premnoplex brunnescens) inhabits the understory of humid montane forests in Central and South America. Apart from basic information on eggs and nest form, little has been published on its breeding ecology. Using temperature sensors in nest cups, I have collected data on the diurnal patterns of egg-coverage from three nests in eastern Ecuador and reveal a remarkable incubation rhythm. After providing near-constant coverage during the morning, adults leave the eggs unattended for most of the afternoon, returning to the nest only in the late afternoon. The mean duration (+/- standard deviation) of this period of absence, across the entire incubation period at three nests, was 6.4 +/- A 1.9 h. These results are discussed in relation to their physiological and ecological significance.

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