西藏察隅县营区蚊虫的组成及分布特征

目的 调查察隅县营区室内外蚊虫的组成及其空间分布情况。方法 采用二氧化碳诱蚊灯法和帐诱法,对院落、畜圈外周和野外林地3种栖息环境内的蚊虫进行调查取样、分类鉴定和计数,所获资料分别应用数量和分布型进行统计分析。结果 本次调查共捕获蚊类2亚科4属6种共822只,其中,伪杂鳞库蚊数量最多,占捕获总数的86.25%;其次是多斑按蚊和骚扰阿蚊,分别占5.47%和5.23%;在不同栖息环境捕获次数中,人房中最高是伪杂鳞库蚊,占分布类型0.476,畜圈周围较高的是带足按蚊、多斑按蚊和骚扰阿蚊,占分布类型0.750、0.818和0.615,刺扰伊蚊仅在林地捕获。结论 伪杂鳞库蚊不仅在数量上占优势,并偏好入室活动;提示在防治时室内采取滞留喷洒,室外重点进行孳生地治理;带足按蚊和多斑按蚊偏向于在畜圈活动,畜圈应是该2种蚊虫的重点防治区域。

Composition and distribution of mosquitoes at the camp in Chayu county of Tibet,China

Objective To investigate the spatial distribution and species composition of indoor and outdoor mosquito communities at the camp in Chayu county of Tibet, China. Methods C02 light traps and human-baited mosquito nets were used to sample the mosquitoes at the outdoor courtyard, around the animal pens, and in the forest. Captured mosquitoes were classified and counted, and the obtained data were statistically analyzed in terms of the number and species composition of mosquitoes. Results A total of 822 mosquitoes were captured, belonging to 2 subfamilies, 4 genera, and 6 species, in this study. Among them, Culex pseudovishnui was the main mosquito community, accounting for 86.25% （709/822）, followed by Anopheles maculatus, accounting for 5.47% （45/822）, and Armigeres subalbatus, accounting for 5.23% （43/822）. In the rooms, Cx. pseudovishnui was captured most frequently （0.476, 10/21）; around the pen, An. peditaeniatus, An. maculatus, and Ar. subalbatus had relatively high capture frequencies, with ratios of 0.750 （6/8）, 0.818 （9/11）, and 0.615（8/13）, respectively; Aedes vexans was captured only in the forest. Conclusion The dominant mosquito species is Cx. pseudovishnui, which is endophilic, suggesting that indoor residual spraying and outdoor habitat management should be taken to control the mosquito species. An. peditaeniatus and An. maculates have a preference for animal sites, where the control should be focused on the two mosquito species.