| diseases and mortality in free-ranging brown bear (ursus arctos), gray wolf (canis lupus), and wolverine (gulo gulo) in sweden. | ninety-eight brown bears (ursus arctos), 20 gray wolves (canis lupus), and 27 wolverines (gulo gulo), all free-ranging, were submitted to the national veterinary institute, uppsala, sweden, during 1987-2001 for investigation of diseases and causes of mortality. the most common cause of natural death in brown bears was infanticide. infanticide also was observed in wolverines but not in wolves. traumatic injuries, originating from road or railway accidents, were the most common cause of death in w ... | 2005 | 16107663 |