Journal article
Selection for high activity-related aerobic metabolism does not alter the capacity of non-shivering thermogenesis in bank voles
Comparative Biochemistry and Physiology. Part A: Molecular & Integrative Physiology, Vol.180, pp.51-56
2015
PMID: 25446149
Abstract
An intriguing question is how the capacity of non-shivering thermogenesis (NST)-a special mechanism supporting endothermic thermoregulation in mammals-is affected by selection for high exercise metabolism. It has been proposed that high NST could be a mechanism to compensate for a low basal production of heat. On the other hand, high basal or activity metabolism is associated with physiological characteristics such as high performance of the circulatory system, which are also required for achieving a high NST. Here we tested whether selection for high aerobic exercise performance, which correlates with an increased basal metabolic rate, led to a correlated evolution of maximum and facultative NST. Therefore, we measured the NST of bank voles, Myodes (= Clethrionomys) glareolus, from lines selected for 13-14 generations (n = 46) for high aerobic metabolism achieved during swimming and from unselected, control lines (n = 46). Open-flow respirometry was used to measure the rate of oxygen consumption ((V) over dotO(2)) in anesthetized bank voles injected with noradrenaline (NA). After adjusting for body mass, maximum NST (maximum ((V) over dotO(2) recorded after injection of NA) did not differ between the selected (238 +/- 0.08 mLO(2)min(-1)) and control lines (236 +/- 0.08 mLO(2)min(-1); P = 0.891). Facultative NST (= maximum NST minus resting metabolic rate of anesthetized animals) did not differ between the selected (1.49 +/- 0.07 mLO(2)min(-1)) and control lines (1.50 +/- 0.07 mLO(2)min(-1); P = 0.985), either. Therefore, our results suggest that NST capacity is not strongly linked to maximum activity-related aerobic metabolic rate. (C) 2014 Elsevier Inc. All rights reserved.
Details
- Title
- Selection for high activity-related aerobic metabolism does not alter the capacity of non-shivering thermogenesis in bank voles
- Authors
- Clare Stawski (Corresponding Author) - Jagiellonian UniversityPawel Koteja (Author) - Jagiellonian UniversityEdyta T. Sadowska (Author) - Jagiellonian UniversityMalgorzata Jefimow (Author) - Nicolaus Copernicus UniversityMichal S. Wojciechowski (Author) - Nicolaus Copernicus University
- Publication details
- Comparative Biochemistry and Physiology. Part A: Molecular & Integrative Physiology, Vol.180, pp.51-56
- Publisher
- Elsevier Inc.
- DOI
- 10.1016/j.cbpa.2014.11.003
- ISSN
- 1531-4332
- PMID
- 25446149
- Grant note
- POKL.04.01.01-053/09; UJ/INoS DS/BW 757 / European Union under the European Social Fund Jagiellonian University N N304 168739; NN303 816740 / Polish Ministry of Science and Higher Education; Ministry of Science and Higher Education, Poland
- Organisation Unit
- University of the Sunshine Coast, Queensland; School of Science, Technology and Engineering
- Language
- English
- Record Identifier
- 99678998302621
- Output Type
- Journal article
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