Measuring subcutaneous temperature and differential rates of rewarming from hibernation and daily torpor in two species of bats.

摘要: Prolonged and remote measurement of body temperature (Tb) in undisturbed small hibernators was not possible the past because technological limitations. Although passive integrated transponders (PITs) have been used previously to measure subcutaneous (Tsub) during daily torpor a marsupial, no study has attempted use these devices at Tbs below 10°C. Therefore, we investigated whether interscapular PITs can be as viable tool for measuring Tb hibernating bat (Nyctophilus gouldi; Ng) compared it with measurements heterothermic (Syconycteris australis; Sa). The precision function ambient (Ta) Tsub readings enabled us quantify Tsub-Tb differentials steady-state arousal. Transponders functioned well outside manufacturer's recommended range, down ~5°C. At rest, rectal (Trec) were strongly correlated both species (Ng r(2)=0.88; Sa r(2)=0.95) this also true N. gouldi (r(2)=0.93). During induced rewarming increased faster than Trec species. Our results demonstrate that provide accurate two bats different physiological states, conditions throughout dynamic phases such from torpor. We show that, least rewarming, regional heterothermy common larger other is present capable