Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/20492
Title: Measuring subcutaneous temperature and differential rates of rewarming from hibernation and daily torpor in two species of bats
Contributor(s): Currie, Shannon E (author); Koertner, Gerhard  (author)orcid ; Geiser, Fritz  (author)orcid 
Publication Date: 2015
DOI: 10.1016/j.cbpa.2015.08.007
Handle Link: https://hdl.handle.net/1959.11/20492
Abstract: Prolonged and remote measurement of body temperature (Tb) in undisturbed small hibernators was not possible in the past because of technological limitations. Although passive integrated transponders (PITs) have been used previously to measure subcutaneous temperature (Tsub) during daily torpor in a small marsupial, no study has attempted to use these devices at Tbs below 10 °C. Therefore, we investigated whether subcutaneous interscapular PITs can be used as a viable tool for measuring Tb in a small hibernating bat ('Nyctophilus gouldi; Ng') and compared it with measurements of Tb during daily torpor in a heterothermic bat ('Syconycteris australis; Sa'). The precision of transponders was investigated as a function of ambient temperature (Ta) and remote Tsub readings enabled us to quantify Tsub-Tb differentials during steady-state torpor and arousal. Transponders functioned well outside the manufacturer's recommended range, down to ~ 5 °C. At rest, Tsub and rectal Tb (Trec) were strongly correlated for both bat species ('Ng' r² = 0.88; 'Sa' r² = 0.95) and this was also true for 'N. gouldi' in steady-state torpor (r² = 0.93). During induced rewarming Tsub increased faster than Trec in both species. Our results demonstrate that transponders can be used to provide accurate remote measurement of Tb in two species of bats during different physiological states, both during steady-state conditions and throughout dynamic phases such as rewarming from torpor. We show that, at least during rewarming, regional heterothermy common to larger hibernators and other hibernating bats is also present in bats capable of daily torpor.
Publication Type: Journal Article
Source of Publication: Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology, v.190, p. 26-31
Publisher: Elsevier Inc
Place of Publication: United States of America
ISSN: 1531-4332
1095-6433
Fields of Research (FoR) 2008: 060806 Animal Physiological Ecology
Fields of Research (FoR) 2020: 310907 Animal physiological ecology
Socio-Economic Objective (SEO) 2008: 970106 Expanding Knowledge in the Biological Sciences
Socio-Economic Objective (SEO) 2020: 280102 Expanding knowledge in the biological sciences
Peer Reviewed: Yes
HERDC Category Description: C1 Refereed Article in a Scholarly Journal
Appears in Collections:Journal Article

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