When death comes: linking predator-prey activity patterns to timing of mortality to understand predation risk.

Autor:	Shiratsuru S; Department of Biological Sciences, University of Alberta, Edmonton, Alberta, Canada T6G 2R3., Studd EK; Department of Biological Sciences, University of Alberta, Edmonton, Alberta, Canada T6G 2R3.; Department of Biological Sciences, Thompson Rivers University, Kamloops, British Columbia, Canada V2C 0B8., Boutin S; Department of Biological Sciences, University of Alberta, Edmonton, Alberta, Canada T6G 2R3., Peers MJL; Department of Biological Sciences, University of Alberta, Edmonton, Alberta, Canada T6G 2R3., Majchrzak YN; Department of Biological Sciences, University of Alberta, Edmonton, Alberta, Canada T6G 2R3., Menzies AK; Department of Natural Resource Sciences, McGill University, St-Anne-de-Bellevue, Québec, Canada H9X 3V9., Derbyshire R; Department of Biology, Trent University, Peterborough, Ontario, Canada., Jung TS; Department of Environment, Government of Yukon, Whitehorse, Yukon, Canada.; Department of Renewable Resources, University of Alberta, Edmonton, Alberta, Canada., Krebs CJ; Department of Zoology, University of British Columbia, Vancouver, British Columbia, Canada., Boonstra R; Department of Biological Sciences, University of Toronto Scarborough, Toronto, Ontario, Canada., Murray DL; Department of Biology, Trent University, Peterborough, Ontario, Canada.
Jazyk:	angličtina
Zdroj:	Proceedings. Biological sciences [Proc Biol Sci] 2023 May 31; Vol. 290 (1999), pp. 20230661. Date of Electronic Publication: 2023 May 17.
DOI:	10.1098/rspb.2023.0661
Abstrakt:	The assumption that activity and foraging are risky for prey underlies many predator-prey theories and has led to the use of predator-prey activity overlap as a proxy of predation risk. However, the simultaneous measures of prey and predator activity along with timing of predation required to test this assumption have not been available. Here, we used accelerometry data on snowshoe hares ( Lepus americanus ) and Canada lynx ( Lynx canadensis ) to determine activity patterns of prey and predators and match these to precise timing of predation. Surprisingly we found that lynx kills of hares were as likely to occur during the day when hares were inactive as at night when hares were active. We also found that activity rates of hares were not related to the chance of predation at daily and weekly scales, whereas lynx activity rates positively affected the diel pattern of lynx predation on hares and their weekly kill rates of hares. Our findings suggest that predator-prey diel activity overlap may not always be a good proxy of predation risk, and highlight a need for examining the link between predation and spatio-temporal behaviour of predator and prey to improve our understanding of how predator-prey behavioural interactions drive predation risk.
Databáze:	MEDLINE
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