摘要
布氏田鼠种群季节消长为单峰型,年际动态没有周期性。通过分析该鼠繁殖特征、生活史特征及种群结构,提出了5个对预测种群数量动态趋势有价值的指标,即:4月下半月越冬田鼠的怀孕率;4月下半月越冬鼠平均胴体重:越冬鼠春季(4～5月)平均胎仔数:5月下半月当年生鼠占种群的比例;当年生鼠开始繁殖的时间。同时对该鼠种群数量波动机制进行讨论。
The seasonal population fluctuation of Microtus brandti is one peak and population fluctuation among years has no periodity. By analysising the reproduction and life history characteristics and population structure, we suggest five useful indexes which could predict the trendency of population dynamics. These indexes are as follows: the pregnant rate of overwintering voles in Late April, the mean net body masses(or body mass excluding abdominal viscera)of Overwintering voles in Late April: the mean litter size of overwintering voles in Spring(April—May), the ratio of voles born of this year to population in Late May: the time of pregnancy of voles born of this year. Some discussions on mechanism of popalation fluctuation of Microtus brandti have been given.
出处
《中国媒介生物学及控制杂志》
CAS
CSCD
1992年第5期299-304,共6页
Chinese Journal of Vector Biology and Control
关键词
布氏田鼠
种群趋势
预测指标
Brandt's Voles ( Microtus brandti) Population trendency Predictive index
