Effects of food restriction on energy metabolism in male Apodemus chevrieri from Hengduan mountain region of China

DOI: 10.18805/ijar.B-1038    | Article Id: B-1038 | Page : 419-423
Citation :- Effects of food restriction on energy metabolism in male Apodemus chevrieri from Hengduan mountain region of China.Indian Journal Of Animal Research.2020.(54):419-423
Li-xin Chen, Xue-na Gong, Hao Zhang and Wan-long Zhu zwl_8307@163.com
Address : Key Laboratory of Ecological Adaptive Evolution and Conservation on Animals-Plants in Southwest Mountain Ecosystem of Yunnan Province Higher Institutes College, School of Life Science of Yunnan Normal University, Kunming-650 500, China.
Submitted Date : 19-09-2018
Accepted Date : 25-01-2019

Abstract

To investigate the relationship between the energy strategies in response to food restriction and the levels of metabolism in small mammals, body mass, resting metabolic rate (RMR), nonshivering thermogenesis (NST) and cytochrome c oxidase (COX) activity were measured in Apodemus chevrieri that were subjected to different levels of food restriction (FR). The results showed that cold-exposed group had significantly increased RMR and NST, but decreased body mass and survival rate after being restricted to 80% of ad libitum food intake compared with their counterparts maintained at room temperature. A. chevrieri with higher RMR consumed higher food intake than individuals with lower RMR, whereas no differences were observed in body mass and survival rate between two groups after being restricted to 80% of ad libitum food intake. The results suggest that A. chevrieri characterized by higher levels of metabolism are sensitive to periods of FR, providing a support for the “metabolism switch hypothesis”.

Keywords

Apodemus chevrieri Body mass Cytochrome c oxidase Food restriction Thermogenesis.

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