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Institut de recherche pour la conservation des zones humides méditerranéennes

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Titre :	Breeding population trends of Eurasian Curlew Numenius arquata and other waders: drastic declines on meadows in the west of Schleswig-Holstein from 1968 to 2005 (2011)
Auteurs :	Guenther Busche, Auteur
Type de document :	Article
Dans :	Vogelwarte (49(1) FEB 2011)
Article en page(s) :	1-8
Langues:	Allemand
Résumé :	Busche G 2011: Breeding population trends of Eurasian Curlew Numenius arquata and other waders: drastic declines on meadows in the west of Schleswig-Holstein from 1968 to 2005. Vogelwarte 49: 1-8.The breeding population of meadow-breeding waders in the Dellstedt bog area in the west of Schleswig-Holstein (54 degrees 15' N, 09 degrees 21' E, Fig. 1) was investigated from 1969 to 2005. The breeding populations of four species (Eurasian Lapwing Vanellus vanellus, Common Snipe Gallinago gallinago, Black-tailed Godwit Limosa limosa and Eurasian Curlew Numenius arquata) declined drastically; two species (Eurasian Oystercatcher Haematopus ostralegus and Redshank Tringa totanus) have almost disappeared from the area (Tab. 1). Three pairs of the Eurasian Curlew were recorded in 1968, 22 in 2001 and 6 in 2005 (Fig.2). In 2003, 2004 and 2005 4, 4 and 3-4 territories were found on restored bogs and 6, 3 and 2 pairs on farmed grassland, respectively. In 2003 one pair each bred successfully in these habitats. The drastic decline by 73% in four years can be interpreted as follows: Site fidelity and possibly their high age enabled the birds to maintain a comparatively large population. Later, the combination of age related high mortality and poor breeding success of old Curlews accelerated the decline.The drastic declines of the other species are mainly the result of present farming practice (Tab. 2): There is too little time available for the breeding attempts and second clutches between farming activities.

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