La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	[Migration, biometrics, body mass and moult of Grey Plover Pluvialis squatarola staging on the island of Langenwerder, southwestern Baltic Sea, Germany.]
Auteurs :	Ulrich Brenning, Auteur
Type de document :	Article
Dans :	Vogelwelt (Die) (122(6) 2001)
Article en page(s) :	341-350
Résumé :	A programme for catching and ringing waders has been conducted since 1976 on the nearshore island of Langenwerder situated on the southwestern coast of the Baltic Sea (54degree02' N, 11degree30'E), Mecklenburg-Vorpommern, Germany. More than 60,000 birds have been caught and ringed up to now. The most frequent wader species was the Dunlin Caldris alpina (66.35%). Grey Plovers, data of which is analysed here, made up 2.43%. They are not frequent but regular visitors during the autumn migration. There is a remarkable correlation between the breeding success in the North European/Western Siberian tundra and the numbers of Grey Plovers staging in the Langenwerder region in late summer and autumn. Special attention was paid to the variation in body mass. Adults, which appear first in July and August, show stable body masses, while first-year birds, which pass migrating from the end of August onwards, increase in body mass steadily during the course of the season. Birds resting near Langenwerder are the heaviest between W/S Europe and N/NW Africa. Some adult Grey Plovers interrupt their migration on Langenwerder in a stage of suspended moult, some in active moult of the primaries 1 to 4.

Lundi , mardi et jeudi de 9h à 12h et de 13h à 17h00 : ouverture au public ...