ACTA THERIOLOGICA SINICA >

2023 , Vol. 43 >Issue 1: 11 - 20

DOI: https://doi.org/10.16829/j.slxb.150700

ORIGINAL PAPERS

Effects of a high-fiber diet on energy metabolism in Niviventer lotipes

  • CHI Qingsheng ,
  • LUO Huining ,
  • YAO Xiaogang ,
  • LI Guangrong ,
  • YANG Changqian ,
  • ZHANG Qiang ,
  • LIU Yuhang ,
  • LIU Quansheng
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  • 1 College of Biology and Agriculture, Zunyi Normal University, Zunyi 563006, China;
    2 International Cooperation and Industry Development Center of Guizhou Forestry, Guiyang 550001, China;
    3 Guizhou Kuankuoshui National Nature Reserve, Suiyang 563300, China;
    4 Guangdong Institute of Applied Biological Resources, Guangzhou 510260, China

Received date: 2022-06-05

  Revised date: 2022-07-05

  Online published: 2023-01-10

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Abstract

Small mammals usually show physiological adaptations to cope with seasonal changes in food quality. To examine the adaptive strategy in energy metabolism of Niviventer lotipes responding to varying dietary quality, we acclimated Niviventer lotipes to high-fiber standard rabbit pellets for 4 weeks with a group of animals fed with standard rat pellets as control. Body mass, parameters of energy intake, and expenditure were measured during the experiment. At the end of the experiment, animals were sacrificed to analyze the body composition. The results show that body mass of Niviventer lotipes fed with rabbit pellets decreased continuously and reached 62. 8% of that in control at the end of the experiment. Basal metabolic rate and nonshivering thermogenesis decreased significantly to 55. 1% and 63. 4% of the control respectively after the food treatment of 4 weeks. Food intake, digestive energy, and apparent digestibility also decreased to 63. 7%, 38. 8%, and 71. 8% of that in control, respectively. Body composition analysis showed that the mass and/or length of most vital organs and digestive tracts significantly decreased in animals fed with high-fiber rabbit pellets. Taken together, apparent digestibility decreased in Niviventer lotipes fed with a high-fiber diet, however, neither the mass/length of digestive tracts nor food intake increased to compensate for the decrease in digestive efficiency. Although the basal metabolic rate and nonshivering thermogenesis were down-regulated in animals fed with rabbit pellets, the energy balance cannot be maintained thus the body mass decreased significantly. This might be explained by the low selection pressure related to the utilization of a high-fiber food in the subtropical habitats of Niviventer lotipes.

Key words： Energy budget; Basal metabolic rate; Nonshivering thermogenesis; Apparent digestibility; Digestive tract

Cite this article

CHI Qingsheng , LUO Huining , YAO Xiaogang , LI Guangrong , YANG Changqian , ZHANG Qiang , LIU Yuhang , LIU Quansheng . Effects of a high-fiber diet on energy metabolism in Niviventer lotipes[J]. ACTA THERIOLOGICA SINICA, 2023 , 43(1) : 11 -20 . DOI: 10.16829/j.slxb.150700

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