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Article
Robert L. Jefferies, Auteur ; Rudolf H. Drent, AuteurDans Ardea (94(3) 2006)The current favourable numerical status of most arctic-breeding goose populations conceals an increasing dependence on man-modified habitats for much of the year. Almost all populations are now heavily dependent on agricultural crops when the bi[...]
Article
Marcel Klaassen, Auteur ; Kenneth F. Abraham, Auteur ; Robert L. Jefferies, Auteur ; Mark Vrtiska, AuteurDans Ardea (94(3) 2006)The extent to which migratory birds that breed in the Arctic and winter in southern biomes rely on residual body stores for reproduction is unresolved. The short arctic summer and the limited availability of food early in the season constrain th[...]
