为探讨不同地区中缅树鼩Tupaia belangeri的生理生态适应特征,对其体温调节和产热特征进行了测定,代谢率采用开放式呼吸仪进行测定。结果显示:A组中缅树鼩(禄劝县屏山镇)的体温(T b)与环境温度(T a)的关系为T b=38.0+0.07T a;B组中缅树鼩(昆明团结乡)的体温与环境温度的关系为T b=38.3+0.05T a;热中性区分别为30~35℃和27.5~35℃;基础代谢率分别为(1.40±0.03)mL/(g·h)和(1.66±0.06)mL/(g·h);平均最小热传导为(0.14±0.0034)mL/(g·h·℃)和(0.15±0.0041)mL/(g·h·℃);热中性区内F值,即(RMR/Kleiber期望RMR)/(C/Bradley期望C),分别为0.91±0.01和1.14±0.03。结果表明,昆明中缅树鼩较禄劝中缅树鼩有较高的基础代谢率和较宽的热中性区,并且有较好的调节体温的能力;它们的这种产热特征和体温调节方式的不同可能与它们的生活史和栖息地环境有关。
In order to understand the physiological and ecological adaptations of Tupaia belangeri from Luquan(Group A) and Kunming(Group B),their thermoregulation and thermogenic characteristics as well as metabolic rates were measured.The relationship between body temperature(Tb) and ambient temperature(Ta) were T b(℃) =38.0 +0.07Ta in Group A and T b(℃) =38.3 +0.05Ta in Group B.The thermal neutral zone(TNZ) of T.belangeri was 30 ~ 35℃ and 27.5 ~ 35℃,respectively;the basal metabolic rate(BMR) were(1.40 ± 0.03) mL /(g·h) and(1.66 ± 0.06) mL /(g·h),respectively;the average minimum thermal conductance(Cm) were(0.14 ±0.0034) mL/(g·h·℃) and(0.15 ± 0.0041) mL /(g·h·℃),respectively,and their F-values(RMR / Kleiber predicted RMR) /(C / Bradley predicted C) were 0.91 ± 0.01 and 1.14 ± 0.03 in their respective TNZs.These results indicated that T.belangeri from Kunming had relatively higher BMR,wider TNZ and better thermoregulation ability than that from Luquan,and these differences might closely relate to their life histories and habitats.