横断山区高山姬鼠消化道形态的季节动态  

Seasonal variations of the digestive tract morphology in Apodemus chevrieri distributed in Hengduan Mountains region

作　　者：王蓓[1] 朱万龙[1] 练硝[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,昆明650092

出　　处：《生态学报》2009年第4期1719-1724,共6页Acta Ecologica Sinica

基　　金：国家自然科学基金资助项目(30560026);云南省科技强省研究重点资助项目(2007C000Z1)

摘　　要：为探讨栖息于横断山地区高山姬鼠的消化道特征与环境之间的适应关系,对野外条件下高山姬鼠消化道各项指标进行了测定。实验分别测定了不同季节高山姬鼠胃、小肠、大肠、盲肠的长度、含内容物重、去内容物重、干组织重。结果表明:高山姬鼠消化道特征存在季节性变化,胃、小肠、大肠的各项指标及盲肠去内容物重、干重均于食物质量较好的6月、9月份较高;盲肠长度和含内容物重于3月、11月份较高。高山姬鼠在低温、食物质量下降、繁殖等胁迫因子影响下,通过增加食物摄入、调节消化道形态来满足能量需求的增加,维持正常的生理机能。高山姬鼠的消化道在不同季节中表现出的变化模式说明其有能力适应低纬度高海拔,年平均温度较低的生存环境。To investigate the relationship between the morphology of digestive tract in Apodemus chevrieri and habitual environment,seasonal changes of the digestive tract morphology including stomach,small intestine,large intestine,and caecum in different seasons were determined.The results showed that all the parameters including the weight without contents and dry weight,and/or length of stomach,small intestine,large intestine were higher in June and September.In contrast,the length and weight with contents of caecum were higher in March and November,even the weight without contents and dry weight were higher in June and September than any other seasons.The results of present study indicated that Apodemus chevrieri can meet with the environmental threats like lower ambient temperature,low latitude,less available of food,and the requirement of reproduction by altering of the seasonal morphology of digestive tracts.

关 键 词：高山姬鼠 消化道 季节动态 适应对策 

分 类 号：Q954.6[生物学—动物学]