高原鼠兔繁殖及种群年龄结构的初步研究

Freliminary Studies on the breeding and Population Renew of Plateau Pika in Ganzhi Autonomus

为指导草地鼠害防治 ,我们对甘孜州草地主要害鼠———高原鼠兔的繁殖及种群更替特性进行了研究。结果表明高原鼠兔为季节繁殖的动物 ,其繁殖期为 4月下旬至 7月中旬 ,约 90天 ;雄雌比为 1 :1 31 ,S R为 44 3± 7 2 ,繁殖期中平均繁殖指数为 1 35 ;雌鼠年平均繁殖 2 4胎 ,胎仔数为 1— 6只 /胎 ,平均为2 93只 /胎。

For guide control the grassland rats damage,we were studied the breeding and population renew of plateau pika(Ochotona curzoniae),witch is the major grassland damage ratsin Ganzhi Autonomus.The results are as:It's breeding period are from the last ten-day period of April to the middle ten-day period of July,about ninty days;The male and female ratio are 1/ 1.31 ,S.R are 44.3±7.2;In breeding period the reproductive indices of population are 1.35;The rate of breeding female are 2.4;The baby number are 1-6,the average are 2.93 in once breeding.The population number of plateau pika is diffrent with the reason.