The Oostvaardersplassen as a key moulting site for Greylag Geese Anser anser in western Europe
作者： Mennobart R van Eerden , Menno Zijlstra , Maarten J J E Loonen , Wouter Dubbeldam
DOI:
关键词: Moulting 、 Western europe 、 Flock 、 Key (lock) 、 Zoology 、 Geography 、 Anser anser 、 Hatching 、 Ecology
摘要: Since its formation in 1968, the Oostvaardersplassen has become largest moulting site for Greylag Geese western Europe. In recent years, over 30,000 non-breeding geese have been counted area. breeding former German Democratic Republic (GDR) are observed most frequently during moult, while birds from Norway form majority of colour-marked individuals autumn and spring. The absence Norwegian Greylags is thought to be due a difference timing moult belonging different grounds. This idea based on positive relation between arrival two successive day Sweden GDR, trend mean hatching date with latitude. During visited by ranging 1 14 years. Improved data mortality rate GDR essential study relative abundance age classes flock.
参考文章(2)
Torgeir Nygård, Bjørn Harald Larsen, Nils Røv, Arne Follestad, Distribution and numbers of moulting non-breeding Greylag Geese in Norway Wildfowl. ,vol. 39, pp. 82- 87 ,(1988)
MJJE Loonen, M Zijlstra, MR Van Eerden, Timing of wing moult in greylag geese Anser anser in relation to the availability of their food plants Ardea. ,vol. 792, pp. 253- 259 ,(1991)