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Publications (77)
Geese are messengers in the sky - in spring as in autumn, their calls and wedge formations announce the change of season. But what makes the goose such a fascinating creature? Is it their social nature? Its willingness to undertake dangerous and exhausting migrations over thousands of kilometres? Its adaptability to its habitat and to humans? The a...
First experimental tracking of Red-breasted geese (Branta ruficollis).
This investigation is a preliminary stage of the planed by Le Balkan-Bulgaria foundation complete following of the migration way of the Red-breasted goose using satellite transmitters. It is a part of the Bulgarian-French project for conservation and assessment of the ecosystems in Dobroja. Our experiment has been realised in order to make the use...
Based on the results of an evaluation of floodplain restoration projects in the Netherlands realized and planned floodplain restoration projects along the German Lower Rhine are evaluated.
Influence of man on ecosystems
Current estimates of goose population sizes in western Europe, a gap analysis and an assessment of trends Aktuella skattningar av gåsbeståndens storlek i västra Europa We estimated the size of 30 defined populations of geese wintering in the Western Palearctic (including five re-leased or reintroduced populations of three species). Fourteen populat...
Kolguev Island in the Barents Sea, N Russia, has no rodents; as a consequence it has a relatively small
predator population, which is most beneficial to the breeding success of birds. As a consequence it is an area of
outstanding importance for waders, not only in the Western Palearctic but also across the entire Arctic region.
Until recently, know...
After western palearctic populations of wild geese became nearly extinct in the 1950/60s several protection tools were established internationally for wild geese and other long-distance migrating birds. Since then arctic goose populations recovered, and Greylag Geese were re-introducted successfully. Based on the results of national and internation...
Based on national and international synchronous counts the study presents population status and trends of the most important migratory wild geese species in Germany as well as their spatial distribution. In Germany eight geese species regularly occur in larger numbers. The study presents speciesspecific differences both in distribution and migratio...
Aims To determine the degree of geographical variation in body size of Greater White‐fronted Geese and identify factors contributing to any apparent patterns in variation.Methods Structural measures of >3000 geese from 16 breeding areas throughout the Holarctic breeding range of the species were compared statistically.Results Palearctic forms varie...
Wahl, J., J. Blew, S. Garthe, K. Günther, J. Mooij & C. Sudfeldt (2003): Waterbirds wintering in Germany – trends and population estimates for 1990-2000. Ber. Vogel-schutz 40: 91-103. In 1994 BirdLife International published " Birds in Europe – their conservation status " (TUCKER & HEATH 1994). This comprehensive overview on trends and numbers of b...
The effect of different intensities of winter and early spring grazing by both White-fronted and Bean geese, Anser albifrons and A. fabalis, on the yields of agricultural grasslands (first grass cut) and autumn-sown wheat and barley (grain yield) was studied in the lower Rhine area of Germany. In a first phase of the study paired plots of grazed an...
Data on population size in the wintering and breeding range, annual reproduction and mortality rates as well as breeding densities of Western Palearctic White-fronted Geese were analysed to get an impression about the actual size and development of the population since the. 1950s. Based on these data there seems to be no significant change in these...
"Die wilde Ganß hat viel und mancherley Nahmen 1 wird aber auch von etlichen Schnee=Ganß genennet / deweil sie zu Anfang deß Winters 1 wann der Schnee verhanden / sich bey uns aufhält" zo begon Conrad Gesner in de 17e eeuw zijn beschrijving van de ganzen. Ook tegenwoordig hebben ganzen nog weinig van hun fascinatie verloren. Elke winter, als zij in...
Arguments are given that there is no direct relation between goose damage and the general number of wintering geese or the maximum number of geese in an area. The best way to reduce the negative effects of goose feeding in an area is to create goose-feeding reserves that are big enough to feed the number of wintering geese without overgrazing endan...
Argues that there is no direct relation between goose damage and the general number of wintering geese or the maximum number of geese in an area. The best way to reduce the negative effects of goose feeding in an area is to create goose-feeding reserves that are big enough to feed the number of wintering geese without overgrazing endangered areas....
The following summary may be made of the conclusions drawn from the results and literature: The increase in the numbers of bean and white-fronted geese in Western Europe and thus also on the Lower Rhine is probably caused primarily by shifting of winter quarters within Europe and better counting, whereby a small increase in individuals of the west...
