大仓鼠种群繁殖参数的估算

西文根据大仓鼠自然种群雌体怀胎率，各种类型子宫斑率和幼鼠比率的季节变动规律，估算了1986年河北饶阳县大仓鼠种群的繁殖参数，其研究结果如下：在当年的繁殖季节，大仓鼠越冬雌鼠繁殖3胎次；4、5月份的幼鼠繁殖2胎次；6、7月份的幼鼠繁殖1胎次；9月份左右的幼鼠不参加繁殖。越冬雌鼠春季怀胎和产仔近似正态分布，分布标准差约为13天，平均值为4月20日。幼鼠成熟历期（幼雌体自产出至其产仔）为62天。生殖时滞（雌体两次繁殖间隔）为59天。平均胎仔数为9.1260±2.5971。雌雄性比为1∶1.4926。幼鼠上铗历期为24天。繁殖终止平均日期为9月20日。

ESTIMATING THE REPRODUCTIVE PARAMETERS OF Cricetulus triton POPULATION IN HEBEI, CHINA

According to the variation of pregnancy rate, different types of placental scar rate and juvenile rate, we developed a method to estimate the reproductive parameters of rodents such as reproductive delay (the average time for littered female to litter again), juvenile maturing time (the average time for juvenile to litter after born), reproductive deviation and so on. The estimation results about C. triton in Raoyang county of Hebei, China in 1986 are as follows:During the breeding seasons from March to September, the overwintered females, juveniles in April and May, juveniles in June and July, and juveniles in September litter respectively 3,2, 1 , and 0 times. The first littering pattern of overwintered females is a normal distribution, the average date of littering is April 20 and standard deviation is 13.4 days. The litter size is 9.1260 (?.5971). The sex ratio (females male).is 1:1.4926. The reproductive delay is 59 days. The juvenile maturing time is 62 days. The average time for juvenile to be trapped by wooden traps is 24 days.