Flight rapidly modulates body temperature in freely behaving bats

Animal Biotelemetry

Sara Bumrungsri¹  Huan Ye²  Jinhong Luo²  Stefan Greif³  Yossi Yovel³  Ofri Eitan³ 

[1] Department of Biology, Prince of Songkla University, Hat Yai, Songkhla, Thailand;Hubei Key Laboratory of Genetic Regulation & Integrative Biology, School of Life Sciences, Central China Normal University, Wuhan, China;School of Zoology, Faculty of Life Sciences, Tel Aviv University, Tel Aviv, Israel;Sagol School of Neuroscience, Tel Aviv University, Tel Aviv, Israel;

关键词: Chiroptera;    Energetics;    Foraging strategy;    Heterotherm;    Thermoregulation;   

DOI  :  10.1186/s40317-021-00268-6

来源: Springer

【 摘 要 】

BackgroundBats are remarkable in their dynamic control over body temperature, showing both hypothermia with torpor and hyperthermia during flight. Despite considerable research in understanding bats’ thermoregulation mechanisms, knowledge on the relationship between flight and body temperature in bats remains limited, possibly due to technological restraints.ResultsWe used onboard dataloggers including a temperature sensor and an inertial sensor (accelerometers) and continuously recorded the flight behavior and skin temperature (Tsk) subcutaneously of a perch-hunting bat, Hipposideros armiger, both in the laboratory and in the field. We provide evidence that flight increases the body temperature of bats. The median of the maximum increase in the Tsk caused by flight bouts was 3.4 °C (between 1.9 and 5.3 °C for different individuals) in the laboratory. The maximum Tsk for the bats was narrowly centered around 40 °C (between 38.5 and 40.9 °C). Moreover, we found that the faster the Tsk rises, the greater the maximum increase in Tsk. Interestingly, bats can slow down the Tsk rises with intermittent fights, during which they perch after brief flight bouts to allow the body temperature to drop rapidly. Similar data were collected from field recordings in free-ranging bats.ConclusionsWe suggest that perch-hunting behavior observed in approximately 200 species of bats that results in intermittent flights may function as a thermoregulatory strategy, in addition to optimizing energy efficiency as demonstrated by previous studies.

【 授权许可】

CC BY