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Foraging in a 3D world: how does predation risk affect the horizontal and vertical space use of vervet monkeys?
Douglas Makin, Hallam Payne and Adrian Shrader
School of Biological and Conservation Sciences
Foraging in a 3D world: how does predation risk affect the - - PowerPoint PPT Presentation
Foraging in a 3D world: how does predation risk affect the - - PowerPoint PPT Presentation
Foraging in a 3D world: how does predation risk affect the horizontal and vertical space use of vervet monkeys? Douglas Makin, Hallam Payne and Adrian Shrader School of Biological and Conservation Sciences Aim Determine how vervet monkeys
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Predictions
Lower predation risk under the tree canopy and at the base of trees Predation risk will increase with distance away from the tree Predation risk will increase with height
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Methods
Seven GUD patches were placed along each transect 30 Meters
1 2 3 4 5 6 7
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Results
20 30 40 50 60 70 1 2 3 4 5 6 7
Mean GUD (g) PATCH
Tree Ground
F6,1401 = 82, p < 0.001
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Results
10 20 30 40 50 60 70 80 90
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Mean GUD (g)
PATCH
Troop A Troop B Troop C
F12,1401 = 2.5, p < 0.001
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Discussion
Prefer to feed in trees below the canopy as well as at the tree base Vervets do not forage uniformly across landscapes Landscape of fear is driven by both aerial and terrestrial predators
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Cheney, D. L., and Seyfarth, R. M. 1990. How Monkeys See The World. University of Chicago Press, Chicago. Laundre, J.W., Hernandez, L., and Altendorf, K.B. 2001. Wolves, elk, and bison: re-establishing the “landscape of fear” in Yellowstone National Park, USA. Canadian Journal of Zoology 79, 1401- 1409.