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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Antipredator response diminishes during periods of resource deficit for a large herbivore
Ecology, Volume 100, No. 4, Article e02618, Year 2019
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Description
The starvation–predation hypothesis predicts that, during resource shortages, prey forego antipredator behavior and forage as much as possible to avoid starvation, even when risk of predation is high. We tested this hypothesis using GPS locations collected simultaneously from moose (Alces alces) and wolves (Canis lupus) in the Greater Yellowstone Ecosystem of North America. We assessed shifts in the speed, displacement, and habitat selection of moose 24 h following encounter with wolves (0–1,500 m distance). We examined whether the strength of antipredator behaviors would weaken as winter progressed and the nutritional condition of moose declined. Moose responded to wolf encounters by increasing their rate of movement in early winter, but only within 500 m distance. Importantly, these responses attenuated as winter progressed. Moose did not avoid their preferred foraging habitat (riparian areas) following encounters with wolves at any distance, and instead they more strongly selected riparian areas, especially in early winter. Our findings support theoretical predictions that resource deficits should dampen prey antipredator behavior, and suggest that nutritional condition of prey may buffer against run-away risk effects in food webs involving large mammalian predators and prey. © 2019 by the Ecological Society of America
Authors & Co-Authors
Merkle, Jerod A.
United States, Laramie
University of Wyoming
Kauffman, Matthew J.
United States, Reston
United States Geological Survey
Goheen, Jacob R.
United States, Laramie
University of Wyoming
Statistics
Citations: 16
Authors: 3
Affiliations: 3
Identifiers
Doi:
10.1002/ecy.2618
ISSN:
00129658
Research Areas
Food Security