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

摘要： 目的 了解重庆市沙坪坝区成蚊密度、种群构成和季节消长规律，为蚊虫防控提供建议和决策依据。方法 2017－2019年每年的4－11月采用诱蚊灯法捕获成蚊，计算成蚊密度；采用Levene检验对各年度成蚊密度方差齐性进行检验；采用多配对样本的Friedman检验对各年度成蚊密度季节消长情况进行比较；采用χ²检验对不同生境成蚊构成比进行比较。结果 沙坪坝区主要蚊种有致倦库蚊、三带喙库蚊、骚扰阿蚊、白纹伊蚊和中华按蚊，致倦库蚊为优势蚊种；2017－2019年共捕获成蚊6 076只，成蚊总密度为12.66只/（灯·夜）。其中，农村牲畜棚的成蚊密度最高为42.50只/（灯·夜），其次是农户为10.18只/（灯·夜）。各类生境蚊种均以致倦库蚊为主，其构成比均>77.00%。2017－2019年成蚊密度最高峰均在6月，其中2018年6月成蚊密度最高，为64.20只/（灯·夜）。结论 重庆市沙坪坝区成蚊密度特征及季节消长情况与当地气候、生境类型、蚊虫控制活动开展情况相关。建议全区在每年的5－9月开展环境治理、成蚊灭杀，且重点整治对象为农村牲畜棚和农户，并将成蚊密度和蚊媒传染病进行关联分析。

关键词: 成蚊密度, 监测, 种群构成, 季节消长