珠江三角洲黄毛鼠种群数量动态的研究

Studies on the Population Quantitaty Dynamics of Rattus rattoides in Pearl River Delta

本文研究农田黄毛鼠种群年度和季节数量动态。稻田区数量最高的季节为7～11月,冬春季12月～翌年6月相对来说密度较低,只是在3月份有一较小幅度增长。蕉田区黄毛鼠种群数量变化4～10月较低,11月～翌年3月数量相对较高,全年可以为呈马鞍形,即冬春较高密度,夏秋密度较低。山坡果园地小家鼠种群密度季节变化比较明显,也呈现冬春密度较高,夏秋密度较低的马鞍形曲线。

The population dynamics of Rattus rattoides in Pearl River Delta were studied from March, 1987 to December, 1989. At our investigating places, there were mianly three biotopes, namely: rice field, banana field and hillside orchant field. The quantitaty of population in rice field was higher from July to November, lower from December to June. But there was a little increase in March. The population number fluctuation of banana field was lower from April to october, higher from December to March. Mus musculus was the dominant species in hillside orchant field. The seasonal change of its population density was obvious. It was higher in spring and winter, lower in summer and autumn, and especially the lowest in August. The peak of its density was occured in December and January. The quantitative fluctuation of R. rattoides population had related to seasonal change, temperature and relative humidity, as well as the farming activies.