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Article
Anthony D. Fox, Auteur ; Henning Heldbjerg, Auteur ; Kevin K. Clausen, Auteur ; Ole R. Therkildsen, Auteur ; Qingshan Zhao, Auteur ; Juan J. Negro, Auteur ; Andy J. Green, AuteurDans Wildfowl (73 2023)Four adult female Greylag Geese Anser anser tagged with GPS/GSM tracking devices in East Jutland, Denmark migrated to spend the winter of 2021/22 in Coto Doñana, southern Spain. Regular 10-min GPS positions confirmed that three out of the four b[...]
Article
Kevin K. Clausen, Auteur ; Henning Heldbjerg, Auteur ; Anthony D. Fox, AuteurDans Wildfowl (73 2023)Breeding census data and September counts show that numbers of Greylag Geese Anser anser breeding in Denmark have increased more than six-fold in the period 1990–2020. From around the year 2000, the species has also started wintering in Denmark,[...]
Article
Jesper Madsen, Auteur ; Jesper Pedersen, Auteur ; Lei Cao, Auteur ; Kevin K. Clausen, AuteurBarnacle Geese wintering in an intensively farmed area in Southeast Denmark were GPS tagged in early March. Twenty tagged geese selected large open (especially permanent) grasslands above relative availability and close to their roosts, although[...]
Article
Anthony D. Fox, Auteur ; Morten Frederiksen, Auteur ; Thomas Heinicke, Auteur ; Kevin K. Clausen, Auteur ; Henk P. van der Jeugd, AuteurAn estimated 50% decline in Taiga Bean Geese A. fabalis between the mid-1990s and 2015 contrasted increasing numbers of Tundra Bean Goose A. serrirostris wintering in Western Europe at the same time. Seber dead-recovery analysis of metal-ringed [...]
Article
Kevin K. Clausen, Auteur ; Thomas E. Holm, Auteur ; Claus L. Pedersen, Auteur ; Erik M. Jacobsen, Auteur ; Thomas Bregnballe, AuteurCoastal waters of northwest Europe have recently been subject to growing recreational human activity, which may invoke a parallel upsurge in the associated disturbance-related impacts on coastal habitats and wildlife. In this study, we investiga[...]
Article
Kevin K. Clausen, Auteur ; Kees H. T. Schreven, Auteur ; Jesper Madsen, AuteurDans Wildfowl (70 2020)Tracking of individuals is increasingly being used in waterfowl research. However, the effects of capture and tags on waterfowl welfare and ecology are poorly understood and too rarely reported. In this paper, time budget data are used to invest[...]
Article
Ove M. Gundersen, Auteur ; Kevin K. Clausen, Auteur ; Jesper Madsen, AuteurAbstract. Body mass accumulation is a widely used measure of waterfowl condition and predictor of fitness. So far, however, post-breeding changes in body mass affecting autumn and winter condition have been largely unexplored. Here, changes in b[...]
Article
Kevin K. Clausen, Auteur ; Preben Clausen, Auteur ; Jens P. Hounisen, Auteur ; Marie S. Vissing, Auteur ; Anthony D. Fox, AuteurGlobal Positioning System (GPS) satellite telemetry was used to determine the foraging range, habitat use and minimum flight distances for individual East Atlantic Light-bellied Brent Geese Branta bernicla brota at two spring staging areas in De[...]
Article
Kevin K. Clausen, Auteur ; Michael Stjernholm, Auteur ; Preben Clausen, AuteurClimate changeinduced rises in sea level threaten to drastically reduce the areal extent of important salt marsh habitats for large numbers of waterfowl and waders. Furthermore, recent changes in management practice have rendered existent salt m[...]
Article
Kevin K. Clausen, Auteur ; Thorsten J. S. Balsby, Auteur ; Vianney Goma, Auteur ; Jesper Madsen, AuteurIn wildlife management, the ability to reliably assess population sizes is a basic prerequisite. When populations are managed specifically to maintain a population target this is even more vital. In this study we apply a mark-resight approach us[...]
