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Rewarming rates and thermogenesis in hibernating echidnas

Citation

Nicol, SC and Andersen, NA, Rewarming rates and thermogenesis in hibernating echidnas, Comparative Biochemistry and Physiology, 150, (2) pp. 189-195. ISSN 1095-6433 (2008) [Refereed Article]

DOI: doi:10.1016/j.cbpa.2006.08.039

Abstract

We 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.

Item Details

Item Type:Refereed Article
Research Division:Biological Sciences
Research Group:Physiology
Research Field:Comparative Physiology
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Environmental Sciences
Author:Nicol, SC (Associate Professor Stewart Nicol)
Author:Andersen, NA (Dr Niels Andersen)
ID Code:45059
Year Published:2008
Web of Science® Times Cited:11
Deposited By:Zoology
Deposited On:2007-08-01
Last Modified:2014-11-14
Downloads:0

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