食物限制对高山姬鼠能量代谢和内脏器官形态的影响  

Effects of food restriction on energy metabolism and organs morphology in Apodemus chevrieri

作　　者：柳鹏飞[1] 蔡金红[1] 朱万龙[1] 刘春燕[1] 孟丽华[1] 王政昆[1] 

机构地区：[1]云南师范大学生命科学学院,生物能源持续开发利用教育部工程研究中心,云南省能源与环境生物技术重点实验室,昆明650092

出　　处：《兽类学报》2010年第3期304-309,共6页Acta Theriologica Sinica

基　　金：云南省科技强省重点资助项目(2007C0005Z1);云南省教育厅科学研究基金重大专项资助项目(DZ2009007)

摘　　要：为探讨栖息于横断山区高山姬鼠对食物匮乏的适应策略,在实验室条件下,以每日能量需求为标准,测定了饲喂食量为130%每日能量需求(DER)和70%DER两组高山姬鼠的体重、体温、基础代谢率(BMR)、非颤抖性产热(NST)等的变化,并在限食28d后,测定了肝脏鲜重和消化道形态的变化。结果显示:限食组高山姬鼠的体温、体重、BMR、NST显著降低,比0d分别下降了4.4%、23.6%、38.6%、20.3%。肝脏鲜重显著下降,小肠长度和小肠含内容物重显著增加。在限食条件下,高山姬鼠主要通过降低体重、体温、减少肝脏重量和能量代谢水平及消化器官适应性变化来减少能量支出,以适应食物资源短缺的外部环境。We investigated adaptive responses to dietary restriction in Apodemus cheveri inhabiting the Hengduan Mountain region by comparing body mass,body temperature,basal metabolic rate（BMR） and non-shivering thermogenesis（NST）,liver wet mass,and morphological parameters of the digestive tract in groups that received either 130% or 70% of daily energy requirements（DER）.Compared with the 130% DER group,the 70% DER group was 4.40%,23.6%,38.6% and 20.3% lower in body mass,body temperature,BMR,and NST,respectively after 28 days treatment.Liver wet mass of the 70% DER group was lower than that for the 130% DER animals.In contrast,small intestine length and contents mass in the 70% DER group was significantly higher relative to 130% DER.Under the food restricted conditions A.chevrieri apply physiological adjustments in response to low food environments by reducing body mass,body temperature,liver wet mass,energy metabolism,and adaptive changes in digestive organs to meet the stress of reduced energy resources.

关 键 词：食物限制 高山姬鼠 能量支出 

分 类 号：Q494[生物学—生理学]