关键词: 鼠密度, 种群分布, 季节消长, 昆明机场

Abstract: In order to know rat distribution and regular growth and decline ,to provide scientific basis for rat control, an investigation of rats was carrid out at Kunming airport during April of 1997 to March of 1998.Rats were caught with cages and clips and rat density was measured by the method which rat cages and clips were put in the early evening and fetched in the next morning once a month. A total of 305 rats were caught, and subordinate to 2 orders 3 families 5 genera 6 species. Rat density was 23.0%(305/1 328),Rattus norvegicus is a species of superior rat at Kunming airport. There are two peak periods of rat density in the year ,June to August and February to April, respectively.The species and their composition ratio are listed below: Rattus norvegicus 58.0% (177/305),R. flavipectus 17.8%(54/305),Mus musculusv 2.6%(8/305),Eothenomys miletus 1.3%(4/305),Apodemus cheverieri 11.5%(35/305) and Suncus murinus 8.9%(27/305). Domestic rats were of main kinds, 78.4 %(239/305),wild rats 21.6%(66/305). The result showed that rat infestation was very serious at Kunming airport.It is very necessary to take effective measures and scientific methods to exterminate rats to reduce rat density.