【摘要】 1983——1986年在内蒙古新巴尔虎左旗阿木古郎地区用标志重捕方法对布氏田鼠(Microtu s brandti Radde)的分居(窝)、种群组成和生态寿命等种群生态现象进行了野外调查。在累计近13个月的野外调查中,共标志2934只布氏田鼠,捕获4062次。结果发现布氏田鼠幼鼠正常出窝后7——10天开始分居活动,从开始分居到定居新巢约经3——5天。幼鼠新定居的巢穴距母巢一般在30米之内。布氏田鼠种群的年龄组成有明显的季节变化。5月初全部为越冬的成年个体,6——8月幼体占多数。9月后亚成体占多数。种群的性别组成中,成年组的性比变化较大,总性比接近于1。布氏田鼠的生态寿命约为12——14个月。更多还原

【Abstract】 This study was carried out at Amuguiong, Xinbarhuzuoqi, Inner Mongolia from1933to 1986. The data which was mainly collected by mark and release trapping consisted of a total of4062 captures of 2934individuals of Brandt’s vole. This anticle is the report of the results of the study on the s egregation,the population composition and the ecological longevity. The data were analysised and following results were obtained; 1、The young voles began to segregate from its family be-tw-een 7—10days after going out from the burrow. In general, the distance from the new burrow to its family was within 30metres. 3——5 days was enough for the youngvole to complete its segreation。 2、there was apparent seasonal change of age composiition of Brandt’s population。In early May, Brandtts voles were all over-wintering adults and from June to August the most of Brandt’s voles were young voles.In september, subadults were majority in the population。Sex ratio of adults changed apparently, but sex ratio was approximativ to 1 in the total popultion 3、The ecological longevity of the vole was about12——14 months。更多还原