Abstract: By use of the materials and data registered from 1962-1964 and 1979-1980 the age structure and nature renewal of the population of Apodemus agrarius in the suburbs of Shanghai were analysised.The seasonal fluctuation of population density may be drawn with a curve of double peaks, being higher in fall season, so that it may also be called"posterior peak type'', manifesting the character of subtropical seasonal dynamics. There are two breeding peaks yearly and there is a interval of breeding diapause of 3-4 months in winter.The reproductivity of population increases with that the mean age of individuls in population. The rate of fecundity and number of embryos are prominently influenced by seasonal ambient temperature. Those individuls produced at the interval of summer and autumu, being mature in 5-7 months, will be the main strength of breeding in following spring. Sex of those individuals which produced in spring come to maturity only in two months. Almost the main party of them cannot tide over the bitter cold in winter and will die off thoroughly.From these point of view, it may be recognized that the population of Apodemus agrarius renews once a year.In winter, numbers of Apodemus agrarius in pupolation continually decrease. At that very period, a good opportunity may be taken for eliminating wintering individuals and reducing rodent calamity in next year.Yellow weasals are natural enemies of Apodemus agrarius and should be better protected.

摘要： 研究动物种群的年龄结构及种群的更新,是了解种群数量动态的重要内容之一。动物种群更新是受种群内年龄组成、出生率、死亡率及外界诸因素影响的,深入研究种群的更新规律及导致变动的原因,常能合理地拟定控制动物数量的科学方法。因此这项研究具有理论上及实践上的意义。 黑线姬鼠(Apodemus agrarius)是上海郊区农田中数量最多,危害最大的一种鼠类(盛林等1959)。本文根据1962—1964年及1979—1980年的工作,共获黑线姬鼠5367只。对其种群的年龄结构,繁殖季节波动,种群周期性更新规律等作了初步分析,对郊区农田选择最佳突击灭鼠时机提出了依据。