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Deeply torpid bats can change position without elevation of body temperature

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BARTONIČKA Tomáš BANDOUCHOVA Hana BERKOVÁ Hana BLAŽEK Ján LUČAN Radek HORÁČEK Ivan MARTÍNKOVÁ Natália PIKULA Jiri ŘEHÁK Zdeněk ZUKAL Jan

Druh Článek v odborném periodiku
Časopis / Zdroj Journal of Thermal Biology
Fakulta / Pracoviště MU

Přírodovědecká fakulta Filozofická fakulta Pedagogická fakulta

Citace
Obor Zoologie
Klíčová slova Body temperature Hibernation Locomotor performance Chiroptera Flight
Popis Because body temperature is tightly coupled to physiological function, hibernating animals entering deep torpor are typically immobile. We analysed thermal behaviour and locomotory activity of hibernating greater mouse- eared bats Myotis myotis and found two types of movement behaviour related to body temperature, i.e. movement at high fur temperature and at low fur temperatures (Tflow; less than 5 °C). First Tflow movements appeared at the beginning of March and often occurred during long torpor bouts. In most cases, Tflow events represented slow displacements between clusters of bats. In several cases, however, departure or arrivals from and into clusters was also recorded without any elevation in body temperature. Distance travelled, flight duration and speed of locomotion during Tflow events was lower than in high fur temperature events. Such behaviour could allow bats to save energy long-term and prolong torpor bouts. Tflow movement in torpid bats significantly changes our understanding of basic hibernation principles and we strongly recommend further studies on the subject.
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