中文摘要：

采用封闭式流体压力呼吸计和数字式温度计,在环境温度（Ta）5.0～37.5℃范围内,测定了成体八哥（Acridotheres cristatellus）的代谢率（MR）和体温（Tb）,并计算出每个温度点的热传导（C）,以及MR和C的体重预期值等指标,探讨其代谢产热特征。在Ta为5.0～37.5℃时,八哥的体温基本维持恒定,平均为（41.4±0.1）℃,热中性区（TNZ）为25.0～32.5℃,基础代谢率（BMR）为（125.33±2.08）ml O2/h,是体重预期值的60%;Ta在5.0～25.0℃范围内,MR[ml O2/h]与Ta（℃）呈负相关,回归方程为：MR=365.30-10.07Ta;Ta在10.0～25.0℃时,C最低且基本恒定,平均为（0.06±0.00）ml O2/（g.h.℃）,是体重预期值的100%。八哥具有较低的基础代谢率,相对较高的热传导和体温,符合南方小型鸟类的代谢特征。

英文摘要：

In order to understand the ecophysiological characteristics of the crested mynas（Acridotheres cristatellus） inhabiting in relative warm area,the metabolic rates（MR）,body temperatures（Tb）,and thermal conductance（C） at temperature range of 5.0-37.5℃ was measured.Adult mynas were live-trapped by mist net in the Wenzhou city,Zhejiang Province（27°29′ N,120°51′ E） from September to November 2008.Eight crested mynas（four males and four female） were used in this experiment.Body masses to the nearest 0.1 g were determined immediately upon capture with a Sartorius balance（model BT25S）.The mean body mass of crested mynas was 117.7 ± 3.4 g.Birds were transported to the laboratory and caged（50 cm × 30 cm × 20 cm） under natural photoperiod and temperature.Food and water were supplied ad lib.MR was measured by using closed circuit respirometer,and temperature was controlled by water bath（± 0.5℃）,Tb was measured by insertion of a digital thermometer（Beijing Normal University Instruments Co） into the cloaca,and C was calculated at each temperature below the thermal neutral zone using the formula： C = MR /（Tb-Ta）,where Ta is ambient temperature.The thermal neutral zone of mynas was 25.0-32.5℃.The mean metabolic rates within thermal neutral zone of crested mynas were 125.33 ± 2.08 ml O2 /h,which are 60% of the expectedvalue from their body mass.Mean Tbs of mynas were 41.4 ± 0.1℃.Cs of mynas were 0.06 ± 0.00 ml O2 /（g.h.℃）,100% of the expected value based on their body mass.Below the lower critical temperatures MR increased with declining Ta and the regression equations relating MR to Ta was described as： MR[ml O2 /h]= 365.30-10.07Ta（℃）.The ecophysiological characteristics of crested mynas are： low basal metabolic rate,relatively high body temperature and high thermal conductance.These properties might make them acclimatized to their environments and survive at relative warm temperature areas for this species.