Subtropical mouse-tailed bats use geothermally heated caves for winter hibernation
| Autor: | Noga Kronfeld-Schor, Eran Levin, Shmulik Landau, Eran Amichai, Yoram Yom-Tov, Brit Plotnik, Luzie J. Braulke |
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| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
Hot Temperature
Rhinopoma microphyllum Subtropics General Biochemistry Genetics and Molecular Biology Respirometry Animal science Cave Chiroptera Hibernation Animals Research Articles General Environmental Science geography geography.geographical_feature_category General Immunology and Microbiology biology Ecology Humidity General Medicine Torpor biology.organism_classification Open flow Water Loss Insensible Caves General Agricultural and Biological Sciences Energy Metabolism |
| Popis: | We report that two species of mouse-tailed bats (Rhinopoma microphyllumandR. cystops) hibernate for five months during winter in geothermally heated caves with stable high temperature (20°C). While hibernating, these bats do not feed or drink, even on warm nights when other bat species are active. We used thermo-sensitive transmitters to measure the bats’ skin temperature in the natural hibernacula and open flow respirometry to measure torpid metabolic rate at different ambient temperatures (Ta, 16–35°C) and evaporative water loss (EWL) in the laboratory. Bats average skin temperature at the natural hibernacula was 21.7 ± 0.8°C, and no arousals were recorded. Both species reached the lowest metabolic rates around natural hibernacula temperatures (20°C, average of 0.14 ± 0.01 and 0.16 ± 0.04 ml O2g−1h−1forR. microphyllumandR. cystops, respectively) and aroused from torpor whenTafell below 16°C. During torpor the bats performed long apnoeas (14 ± 1.6 and 16 ± 1.5 min, respectively) and had a very low EWL. We hypothesize that the particular diet of these bats is an adaptation to hibernation at high temperatures and that caves featuring high temperature and humidity during winter enable these species to survive this season on the northern edge of their world distribution. |
| Databáze: | OpenAIRE |
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