Rewarming rates and thermogenesis in hibernating echidnas
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journal contribution
posted on 2023-06-23, 10:53 authored by Stewart Nicol, NA AndersenWe measured body temperatures (Tb) in 14 free-ranging echidnas (Tachyglossus aculeatus) using implanted data-loggers. An average of 1020 ± 744 days of Tb data was recorded from each animal. The average maximum Tb was 35.3 ± 0.7 °C (n = 14), and the lowest Tb was 4.7 °C. Detailed analysis of rewarming events from four echidnas showed rewarming time to be dependent on initial Tb (rewarming time in hours = 15.6 - 0.41Tinitial, n = 31) with an average rewarming rate of 1.9 ± 0.4 °C h- 1. Based on an hourly sampling rate, the peak rewarming rate was found to be 7.2 ± 0.8 °C h- 1 (n = 12), which was measured at a mean Tb of 26.2 ± 2.4 °C. This rate of heating was calculated to be equivalent to a peak oxygen consumption rate of 1.4 ± 0.2 ml O2 g h- 1, approximately 9 times the basal metabolic rate. We found that a plot of rate of change of Tb against Tb for the entire data set from an individual echidna provided a useful summary and analytical tool. © 2006 Elsevier Inc. All rights reserved.
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Publication title
Comparative Biochemistry and Physiology - Part A: Molecular & Integrative PhysiologyVolume
150Issue
2Article number
2Number
2Pagination
189-195ISSN
1095-6433Department/School
MedicinePublisher
Elsevier IncPublication status
- Published
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The definitive version is available at http://www.sciencedirect.comRepository Status
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