Foraging under uniform risk from different types of predators
Author Information
Author(s): T Liesenjohann, J A Eccard
Primary Institution: University of Bielefeld
Hypothesis
How do voles adjust their foraging strategies in response to different types of uniform predation risk?
Conclusion
Voles adapt their feeding strategies to perceived levels of uniform risk, concentrating their foraging effort on fewer trays under increased risk.
Supporting Evidence
- Voles reduced food intake by half when exposed to both avian and mustelid predation risks.
- The presence of weasel odour significantly affected short-term foraging behavior.
- Voles concentrated their foraging effort on fewer trays under increased uniform risk.
Takeaway
Voles change where and how they look for food based on how much danger they feel from predators, focusing on fewer spots when they feel more threatened.
Methodology
The study used a 2 × 2 factorial design to simulate avian and mammalian predation risks and measured voles' foraging behavior in controlled arenas.
Potential Biases
Potential biases may arise from the artificial setting and the limited number of tested individuals.
Limitations
The study was conducted in artificial environments, which may not fully replicate natural conditions.
Participant Demographics
Twelve wild caught male bank voles (Myodes glareolus) were used in the study.
Statistical Information
P-Value
0.03
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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