农村室内持续用毒饵盒彻底灭鼠后家鼠群落的演替现象——小麝鼩(Crocidura suaveolens)的入侵

关于家鼠群落的演替现象,夏武平等曾报道大兴安岭森林采伐地区不同伐区人房内褐家鼠(Rattus norvegicus)、小家鼠(Mus musculus)与黑线姬鼠(Apodemus agrarius)数量的比较(夏武平、罗泽珣,1962);近年郑智民又报道了厦门市1933-1936年褐家鼠为优势种,到1974-1978年,历时40余年,由于种种原因小家鼠变成优势种(郑智民,1982)。

THE SUCCESSION OF HOUSE RODENT COMMUNITY:AFTER A THOROUGH ELIMINATION OF HOUSE RODENTS WITH INDOOR BAITING BOXES IN RURAL AREAS-INVASION OF CROCIDURA SUAVEOLENG

An investigation on house rodents was carried out in 17 villages of 6 municipalities and prefectures in Shandong Province, 1980-1981. Under an investigation of 7996 trap-nights, no Crocidura suaveolens was trapped. Starting from November, 1982, baiting boxes containing Diphacine-Na treated baits were used to kill house rodents at Sujia Village in Jinan suburb. From the end of January to early February, 1983, during 627 trap-days in the village no rodents were trapped but one Crocidura suaveolens. Since then, baiting boxes were used continuously and the density of house rodents had been kept rather low. From the September of 1983 on, a significantly increased number of Crocidura suaveolens were noted. From January, 1982 to February, 1984, 74 Crocidura suaveolens were trapped during 4024 trap-days in the whole village. The capture rate of Crocidura suaveolens was 1.84%, accounting for 68.52% of the sum total.During the 4045 trap-days of the same period of time only 10 Crocidura suaveolens were trapped in 8 nearby villages. The capture rate of Crocidura suaveolens was 0.25%, accounting for 1.83% of the total. We believed that the marked quantitative increase of Crocidura suaveolens, after a thorough elimination of house rodents with baiting boxes, was a succession phenomenon of house rodent community, although the invaded animal was an ins-ectivore.