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La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

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Titre :	Population changes in and threats to Eurasian Curlew Numenius arquata in the Belziger Landschaftswiesen (Brandenburg, Germany).
Auteurs :	Martin Grimm, Auteur
Type de document :	Article
Dans :	Vogelwelt (Die) (126(4) 2005)
Article en page(s) :	333-340
Résumé :	In 2002 the effects of predation, food availability, agricultural use and weather on hatching and fletching success of Eurasian Curlew were Studied in the SPA 'Belziger Landschaftswiesen', one of the last outstanding Curlew breeding sites in Brandenburg, northeastern Germany. Furthermore, Curlew reproduction was analysed for the years 1998-2002 and population change is presented for the years 1991-2002. A remarkable increase of breeding pairs after the initiation of a wetland restoration programme in the early 1990s was followed by a rapid population decline from 1996 until present. In the years 1998-2002 reproduction was constantly too low to maintain the local Curlew population. Due to protection measures, farming activities did not cause any remarkable loss of nests and chicks. Food availability as well as weather in 2002 offered positive general conditions for hatching and fledging. Predation of nests and chicks by mammalian predators turned out to be the key factor responsible for the insufficient breeding success. In contrast, predation by birds appeared to be low. Testing of new promising methods in the management of mammalian predators including 'conditioned taste aversion (CTA)' is suggested for future conservation strategies targeting the threatened curlew population.

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