Rate of metabolism during lactation in small terrestrial mammals (Crocidura russula, Mus domesticus and Microtus arvalis)

Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology
Cédric Cretegny, M Genoud

Abstract

Basal rate of metabolism (BMR) and resting maternal rate of metabolism around peak lactation (RMR(L)) were measured in Crocidura russula, Mus domesticus and Microtus arvalis. These species have a moderate or high BMR relative to the scaling relationship of Kleiber. One goal of the study was to check whether females of these species show elevated rates of metabolism during lactation. A second goal was to test for a possible intraspecific correlation between the level of BMR and the change in rate of metabolism associated with lactation. RMR(L) was significantly higher than BMR in all species when changes in body mass between the two states were taken into account. Data available on other small mammals are in accordance with this finding, which does not support the hypothesis that low-BMR mammal species increase their rate of metabolism during reproduction because Kleiber's relationship represents an optimal level for therian reproduction. Within C. russula and M. domesticus, a significant and negative correlation was found between the level of BMR and the change in rate of metabolism associated with lactation. This pattern is presumably due to the fact that low-BMR females undergo more extensive physiological and anatomical chan...Continue Reading

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Citations

Oct 12, 2010·Proceedings. Biological Sciences·Michael GarrattJane L Hurst
Jan 4, 2013·Proceedings. Biological Sciences·Julita SadowskaMarek Konarzewski
Mar 29, 2014·Biology Letters·Mikko Lehto HürlimannPierre Bize
Jul 29, 2017·Biological Reviews of the Cambridge Philosophical Society·Michel GenoudRobert D Martin
Nov 1, 2015·The Journal of Experimental Biology·Łukasz OłdakowskiJan R E Taylor
May 11, 2012·The Journal of Experimental Biology·Łukasz OłdakowskiJan R E Taylor
Apr 27, 2013·The Journal of Experimental Biology·Nicolas PichaudRobert C Brooks

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