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我们于1974～75年和1985～86年,两次对东海县不同地区的鼠种构成及密度进行了调查。结果表明,10年后的鼠密度已达10年前的7.5倍。10年后的野外主要鼠种已演变成黑线姬鼠,室内主要鼠种汗潮洼、平原两地区由小家鼠演变成褐家鼠。
In 1974-75 and 1985-86, we surveyed the species composition and density of rats in different areas of Donghai County twice. The results show that after 10 years the rat density has reached 7.5 times 10 years ago. Ten years later, the main mouse species in the wild have evolved into Apodemus agrarius. The main indoor rat sweat troughs and plains have evolved from Mus musculus into Rattus norvegicus.