The influence of heat increment of feeding on basal metabolic rate in Phyllotis darwini (Muridae)

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• 作者：Nespolo ; Roberto F. ; Bacigalupe ; Leonardo D. ; Bozinovic ; Francisco
• 关键词：Basal metabolic rate ; Heat increment of feeding ; Respirometry ; Phyllotis
• 刊名：Comparative Biochemistry and Physiology - Part A: Molecular & Integrative Physiology
• 出版年：2003
• 出版时间：January, 2003
• 年：2003
• 卷：134
• 期：1
• 页码：139-145
• 全文大小：175 K

文摘

One of the most important prerequisites for obtaining a reliable measure of basal metabolic rate (BMR) in endotherms is that the animal must be in a post-absorptive condition. However, because of the diversity of nutrition and digestion modes in vertebrates, it is not simple to generalize a standard procedure for BMR measurement. Thus, information in this regard must be experimentally obtained by measuring the heat increment of feeding (HIF). We used a repeated-measures design to test for the effects of HIF on BMR in Phyllotis darwini, a granivorous rodent. Our results suggest that, in this species, feeding induces an elevation in O₂ consumption that can persist up to 4 h after the last meal. In addition, and irrespective of the fasting period, measures made with less than 2 h of fasting yield BMR values that are significantly higher than measurements after longer fasting periods (i.e. 3 and 4 h).