白头鹎体温、体重及能量代谢的昼夜节律  

Diurnal rhythms of Chinese bulbul (Pycnonotus sinensis) body temperature,body mass, and energy metabolism

作　　者：周围[1] 王玉萍[1] 陈德汉[1] 柳劲松[1] 

机构地区：[1]温州大学生命与环境科学学院,浙江温州325035

出　　处：《生态学杂志》2010年第12期2395-2400,共6页Chinese Journal of Ecology

基　　金：国家自然科学基金项目(30670324;30870377);浙江省自然科学基金项目(Y506089);浙江省新苗人才计划资助项目(2007R40G2250013)

摘　　要：动物的生理昼夜节律是对环境昼夜变化的一种重要适应。为探讨白头鹎(Pycnonotus sinensis)体温、体重及能量代谢的昼夜节律变化,采用数字式温度计、电子天平及封闭式流体压力呼吸仪,测定了白头鹎的日体温、日体重和昼夜基础代谢率(BMR)。结果发现:白头鹎日体温及日体重变化存在显著差异,其中夜间体温明显低于白昼,并在4:00时体温呈现最低值;而白头鹎夜间体重显著低于白昼,在4:00时达到最小值,在18:00时达到最大值。另外,白头鹎的BMR也表现出了明显的昼夜差异,夜间BMR显著低于白昼。表明白头鹎体温、体重及能量代谢存在显著的昼夜节律变化,并调节达到自身生理能量平衡,从而适应昼夜环境变化。The diurnal variation of physiological rhythm is an important adaptation mechanism of animals to the environment. In order to understand the diurnal variation of the physiological rhythm of Chinese bulbul （Pycnonotus sinensis）, the adult Chinese bulbuls in Wenzhou of Zhejiang Province were live-trapped by mist net in June 2008, and their diurnal body temperature （Tb）, body mass （Mb）, and basal metabolic rate （BMR） were measured by inserting a digital thermometer （Beijing Normal University Instruments Co., model TH-212） into cloaca, weighed with a Mettler-Toledo balance （model PL3001-S）, and determined with a closed circuit respirometer at controlled temperature （±0.5 ℃）, respectively. The Tb and Mb of the adult Chinese bulbuls had obvious diurnal variation, being significantly lower at 4：00 than at 18：00, but the amplitude of variation was remarkably higher at night time than at day time. The BMR was significantly lower at night time than at day time. The diurnal variation of the rhythms of Tb, Mb, and energy metabolism reflected an inner physiological energetic balance of Chinese bulbul, and played important roles in the diurnal acclimatization of the bird.

关 键 词：白头鹎 体温 体重 基础代谢率 昼夜节律 

分 类 号：Q41[生物学—生理学]