关键词: 成蚊密度, 监测, 种群构成, 季节消长

Abstract: Objective To investigate the density, population composition, and seasonal variation of adult mosquitoes in Shapingba district, Chongqing, China, and to provide advice and decision basis for mosquito prevention and control. Methods The lamp trapping method was used to capture adult mosquitoes from April to November during 2017-2019, and the mosquito density was calculated. The Levene's test was used to assess the homogeneity of variance for adult mosquito density each year; the Friedman test for multiple paired samples was used to compare the seasonal variations in adult mosquito densities each year; the chi-square test was used to compare the composition ratios of adult mosquitoes in different habitats. Results The main mosquito species in Shapingba district were Culex pipiens quinquefasciatus, Cx. tritaeniorhynchus, Armigeres subalbatus, Aedes albopictus, and Anopheles sinensis, with Cx. pipiens quinquefasciatus as the dominant species. A total of 6 076 adult mosquitoes were captured from 2017 to 2019, and the total density of adult mosquitoes was 12.66 mosquitoes/lamp·night, with the highest density being 42.50 mosquitoes/lamp·night in rural livestock sheds, followed by 10.18 mosquitoes/lamp·night in rural households. Cx. pipiens quinquefasciatus was the dominant mosquito species in all habitats, with a composition ratio of >77.00%. The peak density of adult mosquitoes was in June from 2017 to 2019, with the highest density being 64.20 mosquitoes/lamp·night in June 2018. Conclusion The density and seasonal variation of adult mosquitoes in Shapingba district, Chongqing are associated with local climate, types of habitats, and implementation of mosquito control activities. It is suggested that environmental management and adult mosquito eradication activities should be conducted throughout the district from May to September each year, with a focus on rural livestock sheds and rural households; meanwhile, a correlation analysis should be performed between adult mosquito density and mosquito-borne diseases.

Key words: Adult mosquito density, Surveillance, Population composition, Seasonal variation