| 林琳,王丽华,柳劲松.2010.八哥的代谢产热特征及体温调节.动物学杂志,45(5):47-53. |
| 八哥的代谢产热特征及体温调节 |
| Metabolism and Thermoregulation in Crested Mynas (Acridotheres cristatellus) |
| 投稿时间：2010-01-12 修订日期：2010-04-24 |
| DOI： |
| 中文关键词: 八哥 基础代谢率 热传导 体温 |
| 英文关键词:Crested Myna(Acridotheres cristatellus) Basal metabolic rate Thermal conductance Body temperature |
| 基金项目:国家自然科学基金项目(No.30670324,30870377)部分资助 |
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| 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. |
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