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Providing evidence to improve practice

Individual study: Evaluation of intercept feeding to reduce livestock depredation by grizzly bears

Published source details

Morehouse A.T. & Boyce M.S. (2017) Evaluation of intercept feeding to reduce livestock depredation by grizzly bears. Ursus, 28, 66-80


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Provide diversionary feeding to reduce predation of livestock by mammals to reduce human-wildlife conflict Terrestrial Mammal Conservation

A before-and-after study in 1982–2013 in a forested and agricultural area of southwestern Alberta, Canada (Morehouse & Boyce 2017) found that diversionary feeding of grizzly bears Ursus arctos did not reduce predation on livestock. The frequency of grizzly bear-livestock incidents during the spring did not differ significantly during 14 years before (average 0.8 incidents/year) and 15 years after (average 3.3 incidents/year) diversionary feeding commenced. Road-killed ungulate carcasses were dropped by helicopter at sites close to grizzly bear dens each spring during 1998–2013. In 2012 and 2013, 149–160 carcasses were dropped at 14–15 sites in March–April (details for earlier years are not reported). All sites were within a 3,600-km2 area comprising forested mountains adjacent to agricultural land. Remote trail cameras at feeding sites recorded grizzly bears. Complaint data (reports of grizzly bears harassing, mauling or killing livestock) were analysed for March–June in each year before (1982–1995) and after (1998–2013) diversionary feeding commenced.

(Summarised by Anna Berthinussen)