La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Nest-site selection, predation and hatching success of Redshanks Tringa totanus breeding on Wangerooge island.
Auteurs :	Heike Buettger, Auteur ; Stefan Thyen, Auteur ; Klaus-Michael Exo, Auteur
Type de document :	Article
Dans :	Vogelwarte (44(2) MAY 2006)
Article en page(s) :	123-130
Langues:	Allemand
Résumé :	In contrast to a declining breeding population of Redshanks Tringa totanus in Europe, the Wadden Sea population is stable. Current investigations on mainland saltmarshes of the Wadden Sea (Petersgroden, Jadebusen) showed very low hatching success due to high predation. The question arose where Redshanks breed successfully and which parameters determine hatching and breeding success. To answer this question, we investigated nest-site selection, hatching success and nest predation of Redshanks on Wangerooge island, Germany, where abundance of ground predators is assumed to be lower than in mainland areas. In 2003, hatching success was relatively high (89%) on Wangerooge due to low predation. We found no effects of nest-site characteristics on hatching success. Possible explanations of low predation are discussed. The results suggest that an island like Wangerooge could serve as a potential population source for Redshanks breeding in the Wadden Sea. However, further research on breeding success, its variation in space and time and influencing parameters is needed.

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