大绒鼠幼仔的生长发育和产热特征  

Growth and thermogenesis in pups of Eothenomys miletus

作　　者：余婷婷[1] 周庆宏 何丽娟[1] 朱万龙[1] 张浩[1] 高文荣[1] 王政昆[1] 

机构地区：[1]云南师范大学生命科学学院,昆明650092 [2]昆明市海口林场,昆明650114

出　　处：《兽类学报》2014年第2期158-163,共6页Acta Theriologica Sinica

基　　金：国家国际科技合作项目(SQS2014RR102);十二五国家支撑计划子课题(2014BAZ04815006);国家自然科学基金资助项目(31360096;31260097);云南省应用基础研究面上项目(2013FA014)

摘　　要：为阐明大绒鼠幼仔的生长发育和代谢产热特征,本实验测定了1-49日龄大绒鼠幼仔的体重、体温、静止代谢率(RMR)和非颤抖性产热(NST)。依据逻辑斯蒂曲线的拐点(24 d),大绒鼠的体重生长可划分为加速生长相和减速生长相,幼仔的体温在19日龄前逐渐升高,22日龄时接近成体水平;RMR和NST分别在28日龄、19日龄前随日龄逐渐增加,RMR在28日龄时接近成体水平,BAT产热活性在7日龄内被激活。结果表明,大绒鼠胎后发育及产热能力符合晚成性动物的一般特征,即具有短的妊娠期,较少的胎仔数,较长的哺乳期,这些特征对适应横断山特殊多变的环境条件具有重要意义。In order to study the growth pattern and thermogenesis in pups of Eothenomys miletus, postnatal data from 1 - 49 days＇ for E. miletus pups were collected, including body mass, body temperature, resting metabolic rate （RMR） and nonshivering thermogenesis （NST）. Body mass growth in E. miletus pups could be divided into rapid-growing and slowgrowing phases based on the inflection point of a logistic growth curve （24 days）. Body temperature of pups increased with age, and approached the adult level at 22 days after birth. RMR and NST increased with age continually, reached the adult level at 28 days of age. BAT thermogenesis was active within the 7 day after birth. These results show the growth pattern and thermogenesis in pups of E. miletus accord with altricial mammal characters; the short gestation period, fewer foetus, and longer feeding term are important adaptation to the special and changeable environment in Hengduan Mountains region.

关 键 词：大绒鼠 胎后发育 产热 晚成型动物 

分 类 号：Q494[生物学—生理学]