普通朱雀标准代谢率的初步研究

Preliminary Study of Standard Metabolic Rate in Scarlet Grosbeak(Carpodacus erythrinus)

以普通朱雀的耗氧量为指标 ,探讨了普通朱雀的能量代谢特征。普通朱雀的热中性区为 2 6.7～3 7.5℃ ,最低标准代谢率为 4 .2 1mlO2 g·h ,最低热传导为 0 .2 4mlO2 g·h·℃。环境温度 (Ta)在 5～ 2 5℃范围内 ,其代谢率与Ta呈负相关 ,回归方程为SMR =8.74 -0 .1 7Ta ,体温稍有降低。Ta超过 3 7.5℃ ,SMR升高。

In order to study the characteristics of thermoregulation in Scarlet grosbeak(Carpodacus erythrinus),their standard metabolic rate(SMR),body temperature(Tb),body weight were measured at several ambient temperature(Ta) 5～25℃,and thermal conductance were calculated. The experiments were taken from April to May in 1998,the results are obtained mainly as follows. 1.The thermal neutral zone(TNZ) for grosbeaks are extended from 26.7 to 37.5℃. 2.The minimum metabolic rate was 4.21*!ml*!O 2/g·h, below the low critical temperature, SMR increased with reducing Ta and Tb decreased lightly. The relationship between SMR and Ta was negative, which be described as:SMR=8.74-0.17*!Ta. Above the upper critical temperature, SMR increased and Tb enhanced 25℃. 3. The minimum thermal conductance(C) of grosbeaks was 0.24*!ml*!O 2/g·h·℃. We found that the adaptation of grosbeaks to environmental climate was by the means of the slight higher level SMR and thermal conductance, and high intensity of chemical thermoregulation.