La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	How short or long living are tits of the Genus Parus? (2008)
Auteurs :	Klaus George, Auteur
Type de document :	Article
Dans :	Vogelwarte (46(3) AUG 2008)
Article en page(s) :	217-221
Langues:	Allemand
Résumé :	The foothill zone of the Harz mountains gives home to six species of tits of the Genus Parus. In an area free of nestboxes and abroad from artificial winter feeding 2074 of those tits during 17 years were captured, ringed and in some cases retrapped up to nine times at the place of ringing. 263 tits were retrapped as adult birds during breeding season at least once during the first 12 study years of the long term trapping program. Survival dates of adults were calculated from the retraps. According to the results species can be grouped into two cohorts: tit species with short lifespan (Blue Tit Parus caeruleus, Great Tit P. major, Coal Tit R ater) and tit species with significantly longer lifespan (Crested Tit Parus cristatus, Marsh Tit P palustris and Willow Tit R montanus). Strategies of population regulation are discussed.

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