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1 April 2006 Brown bear predation on domestic sheep in central Norway
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Abstract

In 1994, we studied predation on domestic sheep using mortality radiocollars in an area in central Norway inhabited by brown bears (Ursus arctos). The total loss among 234 radiocollared ewes in 3 herds released on summer pastures was 54, and 51 (94.4%) were due to bear predation. Among 337 radiocollared lambs, 37 were known to have died, 14 (42.4%) due to bear predation. Bears selected ewes over lambs, consistent with optimal foraging theory. Ewes with bells had a higher risk of being killed than ewes without bells. Selection of young ewes with male-dominated litters in spring and small lambs can partly be explained according to parental investment theory and selection for individuals that are last in the flock when attacked or chased by bears.

Vebjørn Knarrum, Ole J. Sørensen, Truls Eggen, Tor Kvam, Ole Opseth, Kristian Overskaug, and Arnstein Eidsmo "Brown bear predation on domestic sheep in central Norway," Ursus 17(1), 67-74, (1 April 2006). https://doi.org/10.2192/1537-6176(2006)17[67:BBPODS]2.0.CO;2
Received: 9 August 2002; Accepted: 1 May 2005; Published: 1 April 2006
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