Abstract: Six and a half years' mark-recapture，trap-dissection and captive feeding data are presented to charaeterize survival and movement of Rattus nilidus in the Western Sichuan Plain．The results show that interval between first and last capture for most of individuals was less than 4 months．Life span of males and females was at least 12 and 15 months，respectively．The male individuals lived longer than the female individuals．Of the adult individuals 90% moved with mean movement distance 39 m (male)and 35m (female)within their active center．and 10% dispersed 115 m (male)and 140 m (female)of their active center．Our long-term data on life history emphasize the importance of apparent frequency of adult dispersal due to flexible and facultative response of individuals to changeable and predictable environmental conditions, and
short life span of R．nitildus aswel1．

Key words: Rattus, nitidus, Life history, Dispersal, Survival, Movement

摘要： 本文用6年半的标志重捕资料、夹捕解剖和人工饲养资料说明了川西平原大足鼠的存活和运动特征，结果表明：大多数个体首末两次被捕的时间间隔小于4个月，雌雄寿命分别为12和15个月，雄性长于雌性。有90%的成体在其活动中心运动，平均运动距离雄雌分别是39 m 和35m；有10%的成体发生扩散，离开它们的活动中心，平均扩散距离雄性和雌性分别为115 m 和140m。我们所获得的关于大足鼠生活史的长期资料，说明它为了适应多变的农田环境条件，进化形成了成年个体有明显的扩散和寿命较短的特征。

关键词: 大足鼠, 生活史, 扩散, 存活, 运动