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In artificial roost comparison, bats show preference for rocket box style
Julia P S Hoeh1, George S Bakken2, William A Mitchell2
1Center for Bat Research, Outreach, and Conservation, Indiana State University, Terre Haute, Indiana, United States of America.
Plos One
|November 1, 2018
Summary
Artificial roosts are crucial for bat conservation. Rocket boxes offer superior microclimate conditions and were preferred by Indiana bats, highlighting their effectiveness as artificial roosts.
Area of Science:
- Ecology
- Conservation Biology
- Animal Behavior
Background:
- Effective conservation of temperate-zone bats relies on understanding their microhabitat preferences for optimal roost selection.
- Artificial roost structures are increasingly employed to support at-risk bat populations.
Purpose of the Study:
- To compare microhabitat conditions across three artificial roost designs: bat box, rocket box, and bark mimic.
- To determine if bats exhibit roost selection behavior based on artificial structure type.
Main Methods:
- Installed three styles of artificial roosts in six clusters.
- Measured roost dimensions and internal temperatures (12 points/roost) with and without bat occupancy.
- Conducted bat census counts over 1-2 active seasons in clusters available to bats.
Main Results:
- Rocket boxes offered larger entrance areas, surface areas, and volumes compared to other designs.
- Bat boxes and rocket boxes provided more internal positions within bats' critical temperature range (0-45°C).
- Indiana bats (Myotis sodalis) preferentially roosted in rocket boxes, with four of five becoming primary maternity roosts.
Conclusions:
- Rocket boxes provide superior microclimate availability and stability, making them a preferred artificial roost for bats.
- Artificial roost design significantly influences microhabitat conditions and bat selection.
- Managers should carefully consider the design and potential impacts of artificial roosts used in conservation efforts.
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