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Converting Predation Cues into Conservation Tools: The Effect of Light on Mouse Foraging Behaviour
Bridgette Farnworth1, John Innes2, Joseph R Waas1
1University of Waikato, Hamilton, New Zealand.
Plos One
|January 14, 2016
Summary
Artificial light deters invasive mice (Mus musculus) from foraging, indicating illumination can be a conservation tool. This study shows mice avoid lit areas, suggesting light can limit their activity and protect native biodiversity.
Area of Science:
- Ecology
- Animal Behavior
- Conservation Biology
Background:
- Prey species balance energy acquisition with predator avoidance using various cues.
- Nocturnal rodents' foraging is influenced by illumination levels.
- Introduced mice in New Zealand pose a significant threat to native biodiversity.
Purpose of the Study:
- To determine if artificial light induces risk avoidance behavior in mice (Mus musculus).
- To assess the potential of illumination as a conservation tool to limit mouse activity.
Main Methods:
- Utilized Giving-Up Densities (GUDs) to measure foraging effort.
- Observed foraging frequency and duration in both captive and wild mice.
- Compared mouse behavior in illuminated versus dark control areas.
Main Results:
- Both captive and wild mice exhibited avoidance behavior in response to artificial illumination.
- Mice significantly reduced seed removal and foraging time in lit areas compared to dark controls.
- Captive mice spent less time foraging and made fewer visits to illuminated areas.
Conclusions:
- Artificial illumination can effectively deter mice from foraging, suggesting its utility in conservation.
- Illumination may serve as a protective measure in ecologically sensitive areas and at vulnerable infrastructure points.
- Understanding mouse aversion to light advances knowledge of risk assessment and foraging under perceived danger.
