TEMPERATURE REGULATION IN ECHIDNA (TACHYGLOSSUS ACULEATUS)
TEMPERATURE REGULATION IN ECHIDNA (TACHYGLOSSUS ACULEATUS)
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DOI：
10.1002/jcp.1040670108
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发表时间：
1966-01-01
影响因子：
5.6
通讯作者：
CRAWFORD, EC
中科院分区：
文献类型：
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作者：
SCHMIDTNIELSEN, K;DAWSON, TJ;CRAWFORD, EC
针鼹鼠（Tachygloisusaculeatus）的体温保持在30.7[degree]C [±] 1.03 s. D.（N =23），环境温度（TA）在0和25[degree]C之间。然而，在低TA时，它也可能变得体温过低。在TA =30[degree]C或更高时，针鼹鼠变得体温过高。热中性范围约为20-30[degree]C。在低TA时，代谢率可能增加数倍。热导率在TA =20[degree]C时最小，并且在较低的TA时没有进一步降低。在较高的TA的热导率增加了5倍。随着TA的增加，蒸发量变化不大。在我们使用的最高TA（33[degree]C）下，平均蒸发仅占代谢产生的热量的三分之一。这些结果表明，针鼹，虽然它可以保持其体温在低环境温度，不能依赖蒸发作为主要途径的热量损失在高环境温度。
The echidna (Tachygloisus aculeatus) maintained a body temperature of 30.7[degree]C [plus or minus] 1.03 s. d. (N =23) at ambient temperatures (TA) between 0 and 25[degree]C. It may, however, also become hypothermic at low TA. At TA =30[degree]C or above the echidna became hyperthermic. The thermoneutral range was about 20-30[degree]C. At low TA the metabolic rate might be increased several fold. The thermal conductance was at a minimum at TA =20[degree]C, and was not further reduced at lower TA. At higher TA the thermal conductance increased up to 5-fold. The evaporation showed little change with increasing TA. At the highest TA we used (33[degree]C) the evaporation on the average accounted for the dissipation of only about one-third of the metabolic heat produced. These findings suggest that the echidna, although it can maintain its body temperature at low ambient temperature, cannot rely upon evaporation as the major avenue for heat loss at high ambient temperature.