臭鼠种群相对数量季节变化的初步分析

１９８５年４月至１９９２年１２月，作者采用夹日法对萧山围垦农区臭种群动态进行了连续逐月定点定时的研究。结果表明：臭种群相对数量的季节消长呈后峰型双峰曲线，５月和１０月各出现一次高峰，怀孕率在２月和７月各出现一次高峰，平均胎仔数在５—６月和８—９月相对较多。室外种群相对数量高峰在４月和９—１０月；室内种群在５月和１０月，前峰不及室外种群明显。室内种群雌体怀孕率明显高于室外种群。种群相对数量的季节变化亦存在性别差异。

STUDIES ON THE SEASONAL DYNAMICS OF THE MUSK SHREW POPULATION

The seasonal dynamics of the musk shrew population had been studied in the re-claimed rural area of Xiaoshan,Zhejiang from April l985 to December 1992.The resultsof the studies showed that the capture rate of musk shrew population varied seasonallywith two peaks occurring in May and October respectively,the latter was higher thanthe former,The seasonal variation on the breediiig characteristics of the female muskshrew also could be found,and the higher pregnancy rate occurred in February and Ju-ly. The mean litter size of the female musk shrew was higher in May to June and Augustto September.From the population fluctuation curves,we could know that the seasonal dynamicsof the musk shrew population were different between field population and domestic pop-ulation. In the field population,the peak capture rate occurred in April and Septemberto October,and in May and October in the domestic population. The pregnaney rate inthe domestic population was obviously higher than one in the field population.In this pa-per,the difference on the seasonal dynamics between male and female population wasdiscussed too.