Canadian Forest Service Publications
Biting Flies and Activity of Caribou in the Boreal Forest. 2018.Raponi, M.; Beresford, D.V.; Schaffer, J.A.; Thompson, I.D.; Wiebe, P.A.; Rodgers, A.R.; Fryxell, J.M. The Journal of Wildlife Management: http:// 10.1002/jwmg.21427.
Issued by: Great Lakes Forestry Centre
Catalog ID: 39067
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Plain Language Summary
Habitat loss has been implicated in the decline of forest-dwelling caribou (Rangifer tarandus caribou), but it is unknown how biting insects, potentially important components of boreal forest habitat for caribou, influence the activity of this threatened species. During summers in 2011 and 2012 in northern Ontario, Canada, we quantified the relative abundance of black flies, mosquitoes, and tabanids in boreal forest stands of different ages and related their abundance to caribou activity. We counted insects in young (25–35 yrs since forest harvesting), intermediate (36–69 yrs), and old (≥70 yrs) stands using sweep nets and counts on human subjects. We related the daily variation in abundance of these insect families, along with daily maximum temperature, to the activity of female caribou, determined by accelerometers in GPS collars. Our study reveals that biting flies can alter the behavior of female caribou in the boreal forest. Loss of old stands may accentuate the potential for insect harassment.