Evaporative water loss and energy metabolic in two small mammals, voles (Eothenomys miletus) and mice (Apodemus chevrieri), in Hengduan mountains region
Evaporative water loss and energy metabolic in two small mammals, voles (Eothenomys miletus) and mice (Apodemus chevrieri), in Hengduan mountains region
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DOI：
10.1016/j.jtherbio.2008.04.002
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发表时间：
2008-08
影响因子：
2.7
通讯作者：
Wan-long Zhu;Ting Jia;X. Lian;Zheng-kun Wang
中科院分区：
文献类型：
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作者：
Wan-long Zhu;Ting Jia;X. Lian;Zheng-kun Wang
在干燥空气中，测定了大绒鼠和高山姬鼠在不同温度下的蒸发失水量和能量代谢。E. Miletus为22.5-30°C，A. chevrieri为20-27.5°C。这两个物种的平均体温分别为35.75±0.5和36.54±0.61°C。基础代谢率（BMR）分别为1.92±0.17和2.7± 0.5mlO ~ 2/gh。平均最小热导率（Cm）分别为0.23±0.08和0.25± 0.06mlO ~ 2/gh ℃。EWL在E. miletus和A. chevrieri的EWL随温度的升高而增加，35 ℃时最大EWL为4.78± 0.6mgH_2O/gh。大熊猫为5.92±0.43mgH2O/gh。chevrieri。蒸发热损失占总产热的百分比（EHL/HP）随温度的升高而增大，在30°C时EHL/HP最大，为22.45%; miletus和A. chevrieri在27.5°C时的产率为19.96%。这一结果反映了横断山区小型啮齿动物的特点：E. miletus和A.与基于其体重的预测值相比，chevrieri具有高水平的BMR和高水平的总热导率，而它们的体温相对较低。EWL在温度调节中起重要作用。
Evaporative water loss (EWL) and energy metabolism were measured at different temperatures in Eothenomys miletus and Apodemus chevrieri in dry air. The thermal neutral zone (TNZ) of E. miletus was 22.5–30°C and that of A. chevrieri was 20–27.5°C. Mean body temperatures of the two species were 35.75±0.5 and 36.54±0.61°C. Basal metabolic rates (BMR) were 1.92±0.17 and 2.7±0.5mlO2/gh, respectively. Average minimum thermal conductance (Cm) were 0.23±0.08 and 0.25±0.06mlO2/gh°C. EWL in E. miletus and A. chevrieri increased with the increase in temperature; the maximal EWL at 35°C was 4.78±0.6mgH2O/gh in E. miletus, and 5.92±0.43mgH2O/gh in A. chevrieri. Percentage of evaporative heat loss to total heat production (EHL/HP) increased with the increase in temperature; the maximal EHL/HP was 22.45% at 30°C in E. miletus, and in A. chevrieri it was 19.96% at 27.5°C. The results may reflect features of small rodents in the Hengduan mountains region: both E. miletus and A. chevrieri have high levels of BMR and high levels of total thermal conductance, compared with the predicted values based on their body masses, while their body temperatures are relatively low. EWL plays an important role in temperature regulation.