摘要
为探讨东洋界华中区黑腹绒鼠的代谢产热特征及体温调节,本文采用封闭式流体压力呼吸仪对其代谢率、热传导和体温等热生物学指标进行了测定。结果显示：在环境温度为5-25℃的范围内,黑腹绒鼠的体温基本维持恒定,平均体温为36.5±0.1℃;热中性区为25-30℃;基础代谢率为2.99±0.09mlO2/（g.h）;环境温度（Ta）在5-25℃范围内,代谢率（MR）与Ta呈负相关,回归方程为：MR[mlO2/（g.h）]=6.56-0.16Ta（℃）,在此范围内,黑腹绒鼠的热传导率C最低,平均为0.26±0.01mlO2/（g.h.℃）。黑腹绒鼠的基本热生物学特征为：较高的BMR、热传导率和体温以及较宽的热中性区。
To understand the ecophysiological characteristics of Melano-bellied oriental vole （Eothenomys melanogaster） inhabiting the central China region of Oriental realm, we measured their metabolic rates, body temperatures （Tb） , and thermal conductances in a range of temperatures （5 -35℃ ）. Eight animals were used in the experiment. Their average body mass was 28. 17 ±0. 35 g （mean ±SE）. The animals were kept in large cages under natural temperature and photoperiod, and fed with laboratory ＇ rat chow＇ pellets for a week （ comments ： exact number of days here）. Food and water were available ad libitum. The metabolic rates of the animals were measured using a respirometer in a chamber with a constant temperature （ 0. 5℃ ）. The body masses （Mb） and body temperature （Tb） of the animals were measured before and after each measurement. Tb was measured by insertion of a digital thermometer into the rectum at a depth of 3 cm. Prior to each measurement, the animal was fasted for three hours to minimize food interference. Each measurement lasted for one hour. Measurements were taken daily between 9 ： 00 and 17 ： 00 for twenty days. Metabolic rates were expressed as ml O2/g · h. Thermal conductance （ C, in ml O2/（ g · h · ℃ ） was calculated at each temperature below the thermal neutral zone using the formula： C = MR/（Tb -Ta） , where MR refers to the metabolic rate （ml O2/ g · h） , Tb is body temperature （℃） and Ta is ambient temperature （℃）. The results showed that the mean basal metabolic rate within the neutral temperature region （25 -30℃ ） was 2.99± 0. 09 ml O2/ （g · h）. When amibient temperature was between 5 and 25℃ , Melano-bel- lied oriental voles can maintain a stable body temperature at 36. 5 ± 0. 1 ℃. Total thermal conductance （ C ） in the temperature range of 5 - 25℃ was 0. 26 ± 0. 01 ml O2/ （ g · h · ℃ ）. When the ambient temperature was below the neutral temperature region, the metabolic rate （MR） in
出处
《兽类学报》
CAS
CSCD
北大核心
2008年第3期293-299,共7页
Acta Theriologica Sinica
基金
浙江省生态学重点学科资助项目
关键词
黑腹绒鼠
基础代谢率
体温调节
Basal metabolic rate （BMR）
Melano-bellied oriental vole （Eothenomys melanogaster）
Thermoregulation
