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Résumé :
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During the severe winter of 1995/96, many Mute Swans Cygnus olor in Danish waters starved to death. A total of 242 dead swans were collected and x-rayed in order to estimate the occurrence of shotgun pellets originating from illegal hunting. The Mute Swans were collected in eastern Denmark, in Zealand, Mon and Lolland-Falster, where Danish Mute Swans as well as birds from Sweden, Poland and NE Germany winter in great numbers. The frequency of Mute Swans containing shotgun pellets was about 5% (Table 1). Compared with a study from 1979 the frequency had dropped considerably in northern Zealand (from 23% to 4%) and in southern Zealand (from 13% to 6%), whereas no difference was found for Lolland-Falster (7% and 6%, respectively). One reason for the reduction in illegal swan hunting is a decrease in the intensity of hunting in shallow Danish waters following restrictions on hunting methods and the establishment of hunting-free zones within EU Special Protection Areas. In addition, hunters seem to comply better to the hunting regulations now than they did in 1979 and accept that swans do not have an open season.
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