Long-term video surveillance and automated analyses reveal arousal patterns in groups of hibernating bats

Methods in Ecology and Evolution
By: , and 

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Abstract

  1. Understanding natural behaviours is essential to determining how animals deal with new threats (e.g. emerging diseases). However, natural behaviours of animals with cryptic lifestyles, like hibernating bats, are often poorly characterized. White-nose syndrome (WNS) is an unprecedented disease threatening multiple species of hibernating bats, and pathogen-induced changes to host behaviour may contribute to mortality. To better understand the behaviours of hibernating bats and how they might relate to WNS, we developed new ways of studying hibernation across entire seasons.
  2. We used thermal-imaging video surveillance cameras to observe little brown bats (Myotis lucifugus) and Indiana bats (M. sodalis) in two caves over multiple winters. We developed new, sharable software to test for autocorrelation and periodicity of arousal signals in recorded video.
  3. We processed 740 days (17,760 hr) of video at a rate of >1,000 hr of video imagery in less than 1 hr using a desktop computer with sufficient resolution to detect increases in arousals during midwinter in both species and clear signals of daily arousal periodicity in infected M. sodalis.
  4. Our unexpected finding of periodic synchronous group arousals in hibernating bats demonstrate the potential for video methods and suggest some bats may have innate behavioural strategies for coping with WNS. Surveillance video and accessible analysis software make it now practical to investigate long-term behaviours of hibernating bats and other hard-to-study animals.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Long-term video surveillance and automated analyses reveal arousal patterns in groups of hibernating bats
Series title Methods in Ecology and Evolution
DOI 10.1111/2041-210X.12823
Volume 8
Issue 12
Year Published 2017
Language English
Publisher British Ecological Society
Contributing office(s) Fort Collins Science Center
Description 9 p.
First page 1813
Last page 1821