大绒鼠被毛的季节性变化

Seasonal Variations of Hair in Eothenomys miletus

摘要: 为阐明大绒鼠被毛的季节性变化及其在体重调节和体温调节中的作用，本研究测定了季节性变化条件下大绒鼠的体温、被毛重量和非颤抖性产热。结果表明：冬季大绒鼠的体温显著降低，冬季被毛重量和非颤抖性产热显著高于夏季。其中冬季被毛重量较夏季高35.48%。所有结果暗示被毛的适应性变化是野生小型哺乳动物应对环境温度季节性波动的主要适应策略之一，在其体重调节和体温调节中具有重要作用和意义。

Abstract: The role of seasonal change of hair in the regulation of body mass regulation and thermoregulation was examined in Eothenomys miletus in the present study. Mass of hair, body temperature and nonshivering thermogenesis (NST) were measured in E. miletus that were wild-captured over four seasons. The results showed that body temperature was significantly lower in winter, and mass of hair and NST were also higher than those in summer, mass of hair was 35.48% higher in winter compared with that in summer. These findings suggest that seasonal changes in the hair are em-ployed by the wild small mammals in response to seasonal environment fluctuations, and thus play important roles in the regulations of body mass regulation and thermoregulation.