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通过10年鼠情监测,发现长江三峡宜昌地带野外和室内鼠密度的变动趋势不一致.野外鼠类种群变动较大,1983年为11.54%,1984年为24.49%,其它年份为4.11～7.03%;室内鼠类种群变动规律不明显,但其密度普遍高于野鼠.野外和室内鼠种有互相流窜现象,但数量较少.室内优势鼠种是黄胸鼠,褐家鼠和小家鼠,野外优势鼠种是黄毛鼠和黑线姬鼠.室内外优势鼠种逐年交替更换,两者的繁殖情况和食性不同.
After ten years of rodent surveillance, it was found that there was an inconsistent trend in density variation of wild and indoor rats in the Yichang District of the Three Gorges of the Yangtze River.The field mice varied greatly from 11.44% in 1983 to 24.49% in 1984 and 4.11-7.03% in other years. There was no obvious change in indoor mouse population, but its density was generally higher than that in wild mice. There were some species of wild and indoor rats running away from each other, but their numbers were less. The indoor dominant mice were Rattus flavipectum, Rattus norvegicus and Mus musculus, The dominant species are Rattus norvegicus and Apodemus agrarius, and the predominant species indoors and out are alternated year by year with different reproduction and feeding habits.