关键词: 病媒生物, 密度, 种群构成, 季节消长

Abstract:

Objective　To determine the density of primary vector species and their seasonal fluctuation in Pan’an 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 2005 to 2010, the average density of mosquitoes in Pan’an county was 2.04 per lamp-hour, with the prominent species being Culex pipiens pallens / Cx. pipiens quinquefasciatus accounting for 71.81%. The average density of flies was 1.83 per cage with Chrysomya megacephala and Musca domestica as the predominant species, which accounted for 52.62% and 37.81%, respectively. The density of cockroaches was 0.91 per paste, with Blattella germanica as the predominant species (92.10%). The rodent density was 0.89% with Niviventer fulvescens as the predominant species (37.60%). Most mosquitoes and flies appeared in May; the former became most active in July 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　The population composition and seasonal fluctuation of primary vectors in Pan’an county are clarified.

Key words: Vector, Density, Population composition, Seasonal fluctuation