生物学杂志

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高山姬鼠热中性区和蒸发失水的季节性差异

  

  1.  
    1.        云南省高校西南山地生态系统动植物生态适应进化及保护重点实验室,云南师范大学生命科学学院 昆明 650500;
    2.        昆明市海口林场 昆明 650114
  • 出版日期:2016-02-18 发布日期:2016-02-18
  • 通讯作者: 王政昆(1959-),男,教授,研究方向:动物生理生态,E-mail: wzk_930@126.com
  • 作者简介:朱万龙(1983-),男,副教授,研究方向为动物生理生态;
  • 基金资助:
     
    :国家自然科学基金项目(No. 31360096);云南省应用基础研究计划重点项目(No.2013FA014

 
Seasonal variations of thermomoneutral zone and evaporative water loss were measured in Apodemus chevrieri

  1.  
    1.        Key Laboratory of Ecological Adaptive Evolution and Conservation on Animals-Plants in Southwest Mountain Ecosystem of Yunnan Province Higher Institutes College, School of Life Sciences of Yunnan Normal University, Kunming 650500, China
    2.        Kunming Haikou forest farm, Kunming 650114, China
  • Online:2016-02-18 Published:2016-02-18

摘要:  

本论文主要研究了不同季节高山姬鼠的热中性区和蒸发失水的变化。结果表明:冬季高山姬鼠的热中性区为20~27.5,夏季为22.5~27.5高山姬鼠夏季体重、体温、蒸发失水、蒸发失水与代谢率的比率、蒸发热散失占总产热的比率显著高于冬季。冬季的基础代谢率、代谢水产生和蒸发失水比率显著高于夏季。以上结果说明高山姬鼠在冬季热中性区下临界点的转移和代谢率、温度有关,而热中性区上临界点和环境温度无关,说明冬季热中性区下临界点的转移是其适应环境温度变化的一种重要策略;同时在冬季通过降低肺皮蒸发失水量、降低蒸发热散失占总产热的比率等来适应冬季低温干燥的环境。
关键词:高山姬鼠;热中性区;蒸发失水;季节性差异

关键词: 高山姬鼠, 热中性区, 蒸发失水, 季节性差异

Abstract:  

In the present study, seasonal changes of thermomoneutral zone (TNZ) and evaporative water loss (EWL) were measured in Apodemus chevrieri. The results showed that TNZ was 20~27.5℃ in winter, 22.5~27.5℃ in summer, respectively. Body mass, body temperature (Tb), EWL, evaporative water loss/metabolic rate (EWL/RMR) and evaporative heat loss/total heat production (EHL/HP) were significant higher in summer than that in winter, but basic metabolic rate and metabolic water production/evaporative water loss (MWP/EWL)were lower in summer than that in winter. All of the results suggested that the shift of the lower critical temperature of TNZ is possibly associated with the rate of metabolism and ambient temperature (Ta). The upper critical temperature of TNZ may be independent of the changes in Ta. The changes of lower critical temperature of TNZ are an important strategy in adaptation to variations of Ta in A. chevrieri. Moreover, it decreased EWL and EHL/HP to cope with the cold and dry environments in winter.

Key words: Apodemus chevrieri, thermomoneutral zone, evaporative water loss, seasonal variations