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CHARACTERISTICS OF THE RESTING METAB0LIC RATE 0F BRANDTS V0LES (MICROTUS BRANDTI)

LI Qingfen, HUANG Chenxi   

  • Online:2006-07-29 Published:2008-01-05

布氏田鼠静止代谢率特征

李庆芬, 黄晨西   

  1. 北京师范大学生物系,北京

Abstract: In order to study the characteristics of energy metabolism in Brandt’s voles(Microtus brandti),their oxygen consumption,body temperature(Tb)and body weight were measured at several ambient temperature(Ta)between 5— 35℃ ,The experiments were taken from June 20th,l 993 to July 10th,l993 at 32 animals.
The results showed that the thermoneutral zone for the voles extended from 27.5 to 32.5℃.The lowest resting metabolic rate(RMR)was 1.836mlO2/g·h.It was 132.6% of expectant RMR.The lowest thermal conductance was slightly higher than the expectant value(14.5).Below the low critical temperature,RMR.increased with reducing Ta and Tb decreased lightly.The relationship between RMR and Ta was negative liner:RMR=6.9685-0.1852 Ta.Above the upper critical temperature,RMR increased and Tb enhanced 1.9℃.
We found,therefore,that Brandt’s voles adaptation to environmental climate was
by means of the slight higfier level of RMR and thermal conductance,and high intefisity of chemical thermoregulation.

Key words: Resting metabolic rate, Brandss vole(Microtus Brandti)

摘要: 本文以布氏田鼠的耗氧量为指标,探讨了布氏田鼠的能量代谢特征。布氏田鼠的热中性区为27.5至32.5℃,最低静止代谢率(RMR)为1.836mlO2/g·h,是期望RMR的l32.6%。最低热传导率为0.189mlO2/g·h,是期望热传导率的I14.5%。环境温度(Ta)在5-27.5℃范围内,RMR与Ta呈负相关,回归方程为RMR=6.968 5-0.185 2Ta,体温稍有降低。Ta35℃时,RMR升高,体温升高1.9℃。布氏田鼠较高的RMR和热传导率,较宽的热中性区,及良好的化学体温调节强度等生理生态特征,是对生存环境的适应性反应。

关键词: 静止代谢率, 布氏田鼠