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Institut de recherche pour la conservation des zones humides méditerranéennes

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Titre :	Nest-site selection of Redshanks Tringa totanus breeding in Wadden Sea salt marshes: consequences for reproduction, nest predation and management.
Auteurs :	Stefan Thyen, Auteur ; Heike Buettger, Auteur ; Klaus-Michael Exo, Auteur
Type de document :	Article
Dans :	Vogelwelt (Die) (126(4) 2005)
Article en page(s) :	365-369
Résumé :	Nest-site selection and consequences for hatching success of Redshanks breeding in the German Wadden Sea were studied at a mainland breeding site (Petersgroden, Jadebusen) during 2000-2003 and on Wangerooge island in 2003. At the mainland site, a very low annual hatching success (2-11% of clutches) due to high predation presumably by Carrion Crows Corms c. corone, mustelids and rodents was found. Hatching success was dependent on timing of breeding and several vegetational nest-site parameters indicating a positive effect of salt marsh succession on hatching success of Redshanks. On the island, hatching success was very high (89%). Predation of clutches was low although numerous predators occurred (various species of gulls, raptors and corvids, hedgehogs, but no mustelids). The two sites studied are assessed as potential population sinks (mainland site) and sources (island) indicating spatial variability of Redshank reproduction and suggesting source-sink dynamics within the Wadden Sea breeding population. Implications of these results for habitat and predator management of breeding Redshanks and further species of similar nesting ecology are discussed.

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