论文部分内容阅读
褐家鼠是洞庭平原稻作区的主要害鼠之一，在房舍区数量动态复杂，季节消长基本上属春冬双峰型，在农田区数量季节消长为夏秋双峰型。褐家鼠总雌性比为５２．０％，全年繁殖．３～１０月为繁殖盛期，盛期平均怀孕率为３４．９１±８．６９％，平均胎仔数为８．２±ｌ．０，４、７、９月出现怀孕高峰，１１月至翌年２月为繁殖低潮期。褐家鼠在洞庭平原７０年代数量较低，８０年代初暴发成灾，８０年代后期数量有逐步下降趋势。针对种群特征，提出了控制褐家鼠种群数量的对策。
Rattus norvegicus is one of the main pest rats in the Dongting plain paddy area. The number of houses is dynamic and complex. The seasonal fluctuation is basically a spring-bimodal pattern. Rattus norvegicus total female ratio was 52.0%, annual breeding. From March to October was the breeding period, the average pregnancy rate was 34.91 ± 8.69% and the average number of litter size was 8.2 ± 1. 0, 4, 7, September pregnancy peak, November to February next year for the breeding period. Rattus norvegicus was relatively low in the Dongting Plain in the 1970s and was first disrupted in the early 1980s. The number gradually decreased in the late 1980s. In view of the characteristics of the population, the countermeasures to control the number of Rattus norvegicus were proposed.