期刊
JOURNAL OF THERMAL BIOLOGY
卷 37, 期 7, 页码 479-484出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jtherbio.2012.04.007
关键词
Tree shrews; Resting metabolic rate (RMR); Nonshivering thermogenesis (NST); Energy intake; Digestive tract
资金
- National Science Foundation of China [31071925]
- Department of Education Science Research of Yunnan Province [DZ2009007]
- Project of Basic research for application in Yunnan Province [2011FZ082]
Environmental factors play an important role in the seasonal adaptation of body mass and thermogenesis in small, wild mammals. To determine the contributions of photoperiod and cold on seasonal changes in energy metabolism and body mass, the resting metabolic rates (RMR), nonshivering thermogenesis (NST), energy intake and gut morphology of the tree shrews were determined in winter and summer and in laboratory acclimated animals. Body mass, RMR and NST increased in winter, and these changes were mimicked by exposing animals to short-day photoperiod or cold in the animal house. Energy intake and digested energy also increased significantly in winter, and also during exposure of housed animals to both short-day photoperiod and cold. The lengths and weights of small intestine increased in winter. These results indicated that Tupaia belangeri overcomes winter thermoregulatory challenges by increasing energy intake and thermogenesis, and adjusted gut morphology to balance the total energy requirements. Short-day photoperiod and cold can serve as environmental cues during seasonal acclimatization. Crown Copyright (C) 2012 Published by Elsevier Ltd. All rights reserved.
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