关键词: 病媒生物, 密度, 种群构成

Abstract:

Objective To determine the density of primary vector species and their seasonal fluctuation in Haining county for improvement of prevention and control strategies. Methods Light traps, cage traps, roach pastes and night traps were used to capture mosquitoes, flies, cockroaches and rodents, respectively, for density calculations. Results From 2009 to 2012, the average density of mosquitoes in Haining county was 2.31 per lamp-hour, with the prominent species being Culex pipiens pallens/Cx. pipiens quinquefasciatas accounting for 80.23% . The average density of flies was 5.21 per cage with Chrysomya megacephala and Musca domestica as the predominant species, which accounted for 55.40% and 27.46%, respectively. The density of cockroaches was 0.53 per paste, with Blattella germanica as the predominant species (90.35%). The rodent density was 0.69% with Rattus norvegicus and Mus musculus as the predominant species, which accounted for 35.88% and 44.27%, respectively. Most mosquitoes and flies appeared in May; the former became most active in August and the latter in June through August. Cockroaches and rats were observed throughout the year with relatively high roach density from March to October and generally peak rodent density in September． Conclusion By the surveillance, the population composition and seasonal fluctuation of primary vectors in Haining county are clarified, and provide the basic information for vector-borne disease control and prevention．

Key words: Vector, Density, Population composition