Foraging under the risk of predation in desert grassland whiptail lizards (<Emphasis Type="Italic">Aspidoscelis uniparens</Emphasis>) |
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Authors: | Douglas A Eifler Maria A Eifler Bethany R Harris |
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Institution: | (1) USDA Forest Service Liaison’s Office, Haskell Indian Nations University, 155 Indian Ave., Box 5018, Lawrence, KS 66046, USA;(2) Department of Ecology and Evolutionary Biology, University of Kansas, Lawrence, KS 66045, USA |
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Abstract: | The whiptail lizard Aspidoscelis uniparens searches for fossorial prey using a series of moves and pauses punctuated by bouts of digging. We examined the effect of
predation risk on foraging A. uniparens in outdoor enclosures, observing their behavior in the presence and absence of the predatory lizard Gambelia wislizenii. Predator presence led to changes in activity patterns and foraging behavior. When predators were present, A. uniparens reduced both the proportion of time active and time moving, shifted activity periods, reduced their movement rate, and changed
the duration of moves. There were no apparent changes in digging effort, but the likelihood of successfully digging for food
decreased when a predator was present. |
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Keywords: | Aspidoscelis Foraging Lizard Predation risk Saltatory search |
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