中文摘要：

为进一步阐明小型哺乳动物对环境低温的适应对策，测定了黑线仓鼠在冷驯化（5℃）和复温（23℃）过程中的基础代谢产热（基础代谢率，basal metabolic rate，BMR）和非颤抖性产热（non-shivering thermogenesis，NST）的变化。结果显示，在暖温环境下饲养的黑线仓鼠基础代谢率为1．23±0．10mLO2·g^-1·h^-1，非颤抖性产热为4．69±0．34mLO2·g^-1·h^-1均低于其体重异速生长方程计算的期望值；在冷驯化过程中，BMR增加，第3周达到最高值，比常温条件下增加了85．4％；NST随冷驯化时间的延长也有显著增加，第5周达最大值，比常温条件下增加了52．5％。在复温过程中，BMR和NST都降低，NST第1周即可降到初始水平。表明，在暖温条件下，黑线仓鼠具有较低的BMR和NST；在冷驯化过程中，通过增加BMR和NST，弥补低温下热量散失，维持恒定的体温，其中NST在冷适应增加产热中起主要作用。这些冷适应特征兼有北方物种和干旱沙漠物种的特点。

英文摘要：

In order to clarify the thermogenesis and body temperature regulation strategies under cold environment, Striped hamster （Cricetulus barabensis） rearing in warm environment （23 ± 1℃） were exposed to cold （5 ±1℃ ） for five weeks （cold acclimation） and returned to warm （23 ± 1 ℃ ） for 2 weeks （rewarming）. Body temperature, body weight, basal metabolic rate （BMR） and non-shivering thermogenesis （NST） were measured weekly. The results showed that the BMR of Striped hamster adapted warm environment （23 ± 1 ℃ ） was 1.23 ± 0.10 mL O2·g^- 1·h^-1 which was - 85 % of the predicted value based on the allometric equation of rodents species. The body temperature of striped hamster had basically no obvious change while body weight decreased slightly during cold acclimation. Cold acclimation induced increases in BMR and NST by 85.4 % and 52.5 % respectively compared to initial value. The BMR and NST reduced to the original levels a week later of re-warming. These data suggest that Striped hamster had lower metabolic rate in warm environment and maintained constant body temperature through BMR and NST regulation. The NST contributed more than BMR for maintain the constant body temperature during cold acclimation. Together, the cold adaptation strategies are similar to that of northern and semi-desert distributed animals.