Abstract
Coyotes (Canis latrans), black bears (Ursus americanus), and wolves (Canis lupus) were reported responsible for 35, 31, and 16%, respectively, of confirmed predation losses of cattle in Alberta during 1974-78. Coyotes selected for calves over adults, and adults over yearlings, black bears selected for calves over yearlings, and yearlings over adults, and wolves selected for calves and yearlings over adults. Predation of cattle by coyotes, bears, and wolves peaked during March-June, May-July, and AugustSeptember, respectively. Little information is available on predation losses of cattle, even though the value of losses from predation are comparable for cattle and sheep in the United States (Anon. 1978, Gee 1979). In Alberta, the value of cattle lost to predation from coyotes, black bears, and wolves exceeds that of other species of livestock.' This paper describes the monthly chronology and age distribution of predation losses of cattle in Alberta, Canada during 1974-78.
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