摘要
为比较横断山区同域分布物种大绒鼠(Eothenomys miletus)和高山姬鼠(Apodemus chevrieri)的日节律特征,对两种鼠在24 h中4个时间段(04:00～06:00时、10:00～12:00时、16:00～18:00时和22:00～24:00时)的体温和蒸发失水进行了测定。结果显示,大绒鼠、高山姬鼠的体温具有相似的日节律,最高值和最低值分别出现在04:00～06:00时和10:00～12:00时,分别为(37.45±0.17)℃和(37.30±0.24)℃及(35.77±0.42)℃和(36.05±0.11)℃;大绒鼠与高山姬鼠种间的非颤抖性产热、基础代谢率、热传导和干燥热传导,在4个时段间都有显著差异;蒸发失水仅在16:00～18:00时具有种间差异;大绒鼠的基础代谢率和蒸发失水在24 h内具有节律性波动;高山姬鼠非颤抖性产热的日节律变化与体温同步;高山姬鼠的热传导和干燥热传导出现了与环境温度类似的变化趋势。结果表明,同域分布的大绒鼠和高山姬鼠具有相似的体温日节律,高山姬鼠比大绒鼠具有更强的日生理调节能力来维持水和能量平衡,以适应横断山独特的气候特征。
To compare daily rhythms of Eothenomys miletus and Apodemus chevrieri which sympatric distributed in Hengduan Mountains region, their thermoregulation and evaporative water loss （EWL） were measured four times in 04：00-06：00,10：00-12：00,16：00-18：00,and 22：00-24：00 within 24 hours from 24 adult samples （ 12 $ and 12 6 ） for each species. E. miletus and A. chevrieri had a similar body temperature （ Tb） circadian rhythm,their maximum body temperature,37.45 ±0. 17℃ and 37.30 ＋0.24℃ ,occurred at 04：00 - 06：00,respectively,and their minimum body temperature,35.77± 0. 42℃and 36.05 ± 0. 11℃ ,occurred at 10：00 -12： 00. However, significant differences between the two species were found in nonshivering thermogenesis （NST）,basal metabolic rate （BMR）, thermal conductance （C） and dry thermal conductance （ Cdry ）. EWL appeared a significant difference only at 16：00 - 18：00. E. miletus had clear circadian rhythms in BMR and EWL. The NST circadian variation in A. chevrieri corresponded to the Tb oscillations, moreover the daily rhythms of C and CdTy were also synchronous with ambient temperature. Suffering high temperature and low temperature,the two species adapt to environmental conditions by taking the similar daily rhythms of Tb . Compared to E. miletus, A. chevrieri has a stronger physiological regulation mechanism to maintain water and energy balance.
出处
《动物学杂志》
CAS
CSCD
北大核心
2011年第1期36-44,共9页
Chinese Journal of Zoology
基金
云南省科技强省重点项目(No.2007C0005Z1)
云南省教育厅重大项目(No.ZD2009007)
云南师范大学青年科研基金项目(No.10QZ05)
关键词
大绒鼠
高山姬鼠
体温调节
蒸发失水
日节律
Eothenomys miletus
Apodemus chevrieri
Body temperature regulation
Evaporative water loss
Daily rhythms
