Higher fat stores contribute to persistence of little brown bat populations with whiteâ€nose syndrome
- Permanent Link:
- Higher fat stores contribute to persistence of little brown bat populations with whiteâ€nose syndrome
- Series Title:
- Journal of Animal Ecology
- Cheng, Tina L.
Moore, Marianne S.
Reichard, Jonathan D.
Willis, Craig K.R. et al
- British Ecological Society
- Publication Date:
- Subjects / Keywords:
- Emerging Infectious Disease ( local )
Evolution ( local )
Plasticity ( local )
Resistance ( local )
Tolerance ( local )
Trait Change ( local )
- serial ( sobekcm )
- The persistence of populations declining from novel stressors depends, in part, on their ability to respond by trait change via evolution or plasticity. Whiteâ€nose syndrome (WNS ) has caused rapid declines in several North America bat species by disrupting hibernation behaviour, leading to body fat depletion and starvation. However, some populations of Myotis lucifugus now persist with WNS by unknown mechanisms.
We examined whether persistence of M. lucifigus with WNS could be explained by increased body fat in early winter, which would allow bats to tolerate the increased energetic costs associated with WNS . We also investigated whether bats were escaping infection or resistant to infection as an alternative mechanism explaining persistence.
We measured body fat in early and late winter during initial WNS invasion and 8 years later at six sites where bats are now persisting. We also measured infection prevalence and intensity in persisting populations.
Infection prevalence was not significantly lower than observed in declining populations. However, at two sites, infection loads were lower than observed in declining populations. Body fat in early winter was significantly higher in four of the six persisting populations than during WNS invasion.
Physiological models of energy use indicated that these higher fat stores could reduce WNS mortality by 58%â€“70%. These results suggest that differences in fat storage and infection dynamics have reduced the impacts of WNS in many populations. Increases in body fat provide a potential mechanism for management intervention to help conserve bat populations.
- Original Version:
- Journal of Animal Ecology, Vol. 88, no. 4 (2019).
- Source Institution:
- University of South Florida Library
- Holding Location:
- University of South Florida
- Rights Management:
- This object is protected by copyright, and is made available here for research and educational purposes. Permission to reuse, publish, or reproduce the object beyond the bounds of Fair Use or other exemptions to copyright law must be obtained from the copyright holder.
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