丝光椋鸟的代谢产热特征及体温调节的日周期变化  

Daily Cyclic Variation of Metabolism and Thermoregulation in the Silky Starling

作　　者：赵磊[1,2] 郑立云[1] 张伟[1] 黄迪飞[1] 徐云[1] 柳劲松[1,3] 

机构地区：[1]温州大学生命与环境科学学院,温州325035 [2]大连海事大学环境系统生物学研究所,大连116021 [3]温州大学应用生态研究所,温州325035

出　　处：《动物学杂志》2013年第2期269-277,共9页Chinese Journal of Zoology

基　　金：国家自然科学基金项目(No.31070366);浙江省新苗人才计划项目(No.2009R424023)

摘　　要：为探讨丝光椋鸟(Sturnus sericeus)代谢产热特征及体温调节的日周期变化,本研究采用开放式氧气分析仪及数字式温度计,测定了丝光椋鸟24 h体温、体重(Mb)和基础代谢率(BMR)的连续变化。结果显示,丝光椋鸟体温、体重及代谢率的日周期变化存在显著差异。丝光椋鸟夜间体温明显低于白昼,其中体温在凌晨5时降至(40.4±0.1)℃;体重昼夜变化明显,且在20:00～次日6:00时雌雄丝光椋鸟体重的下降与时间分别存在明显的线性关系,雌性为Mb=83.46(±0.12)-0.41(±0.02)t(R2=0.992,P<0.01);雄性为Mb=76.74(±0.15)-0.39(±0.02)t(R2=0.986,P<0.01)(式中的t代表时间)。丝光椋鸟的BMR在凌晨4时降至最低,为(1.96±0.06)ml/(g.h)。结果表明,丝光椋鸟通过内源性的调节,即夜间降低体温、体重及代谢率等途径,调节生理能量平衡,从而适应昼夜环境变化。In order to explain the daily cyclic variation of metabolism and thermoregulation in the Silky Starling （Sturnus sericeus） , the 24 hours continuous changes of body temperature （ Tb ） , body mass （Mb ） and basal metabolic rate （BMR） in silky starling were measured. Tb was determined by a digital thermometer （Beijing Normal University Instruments Co., model TH-212） inserting to cloaca, Mb was measured by an electronic scale （Mettler-Toledo, model PL3001-S） to the nearest 0.1 g, and BMR was measured by an open oxygen analyzer （AEI, model S-3A/I） temperature controlled at 25 =t： 0. 5℃ , respectively. The results showed that daily variation of Tb, Mh and BMR was great significantly. Both of Tb and Mb were significantly lower and varied greatly in night time than those in day time. The lowest Tb was 40. 4 ± 0. 1℃ at 5 o＇ clock. The value of Mb showed a obvious linear variation with time during 20：00 -6：00, and the relationship of Mb in female was Mb =83.46 （±0.12） -0.41 （±0.02） t （R2 =0.992, P 〈0.01） and in male was Mb =76.74 （＋0.15） - 0. 39 （ ±0. 02） t （R2 =0. 986, P 〈0.01）, respeetively. The lowest BMR was （1.96 ＋0.06） ml/（g · h） at 4 o＇ clock. In summary, silky starling could adjust their daily cyclic variation by decrease Tb, Mb and BMR at night. This inner physiological energetic regulation mechanism improved their acclimatization to the diurnal environment variation.

关 键 词：丝光椋鸟 体温 体重 基础代谢率 日周期变化 

分 类 号：Q958[生物学—动物学] Q945