大沙鼠种群年龄结构的季节变化和繁殖特征  

A Study on the Age Structure Dynamics and Reproductive Status of Great Gerbil's Population

作　　者：赵天飙[1] 周立志[2] 张忠兵 靳飞虎 邬建平 宁恕龙[2] 

机构地区：[1]内蒙古大学生命科学学院,呼和浩特010020 [2]安徽大学生命科学学院,合肥230039 [3]内蒙古地方病防治研究中心,呼和浩特010020 [4]包头市达茂旗卫生防疫站,包头011900

出　　处：《动物学杂志》2005年第6期108-113,共6页Chinese Journal of Zoology

基　　金：内蒙古自治区自然科学基金(No.200208020503);国家自然科学基金(No.30370215)

摘　　要：2003～2004年在内蒙古包头市达茂联合旗腾格淖尔地区对大沙鼠(Rhombomys opimus)年龄组成的季节变化及其繁殖特征进行了研究.结果表明,大沙鼠的年龄组成存在着明显的季节变化和年度之间的差异,在2月至次年的4月没有幼体,6月无亚成体;大沙鼠的性比无论从总体还是各个年龄组看,均存在着差异,特别到老体,这种差异更加突出.在内蒙古包头腾格淖尔地区的大沙鼠一年中部分个体参与第三胎繁殖,而且其繁殖状况存在着年际之间的差异.We studied the age structure and the reproductive status of Great Gerbil＇s population in different seasons in Tengenor, Damaolianheqi, Innor Mongolia by dead trapping at every two months during 2003 and 2004. The results showed that the age structures were significantly different between seasons and years. No juvenile was trapped in February and April, and no sub-aduh in June was found in June during the two years. Great Gerbil＇s sex ratios were not in a ratio of 1 ： 1 in the whole population as well as in different age groups especially in senior group. Some Great Gerbils breed three times in a year in Tegemor and the reproductive status changed in different ages.

关 键 词：大沙鼠 种群年龄结构 种群数量变动 繁殖 

分 类 号：Q958[生物学—动物学]