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Location of and landing on a source of human body odour by femaleCulex quinquefasciatusin still and moving air
Physiological Entomology ( IF 1.5 ) Pub Date : 2012-02-13 , DOI: 10.1111/j.1365-3032.2012.00829.x
Emerson S Lacey 1 , Ring T Cardé 1
Affiliation  

The orientation to and landing on a source of human odour by female Culex quinquefasciatus Say (Diptera: Culicidae) is observed in a wind tunnel without an airflow or with a laminar airflow of 0.2 m s−1. Odours from human feet are collected by ‘wearing’ clean glass beads inside a stocking and presenting beads in a Petri dish in a wind tunnel. Mosquitoes are activated by brief exposure to a 1 L min−1 jet of 4% CO2 positioned 10 cm from the release cage. In moving air at 0.2 m s−1, a mean ± SE of 3.45 ± 0.49 landings are observed in 10‐min trials (five mosquitoes per trial), whereas 6.50 ± 0.96 landings are recorded in still air. Furthermore, 1.45 ± 0.31 mosquitoes are recorded on beads at any one time in moving air (a measure of individuals landing versus one landing multiple times) compared with 3.10 ± 0.31 in still air. Upwind flight to beads in moving air is demonstrated by angular headings of flight immediately before landing, whereas approaches to beads in still air are oriented randomly. The mean ± SE latency until first landing is 226.7 ± 17.98 s in moving air compared with 122.5 ± 24.18 in still air. Strategies used to locate a prospective host at close range in still air are considered.

中文翻译:

雌性库蚊静止和流动的空气对人体气味源的定位和着陆

在没有气流或层流气流为 0.2 ms-1 的风洞中观察到雌性库蚊 (Culex quinquefasciatus Say)(双翅目:库蚊科)对人类气味源的定向和着陆。人脚的气味是通过将干净的玻璃珠“佩戴”在长袜内并在风洞中的培养皿中呈现珠子来收集的。蚊子通过短暂暴露在距离释放笼 10 厘米处的 1 L min-1 4% CO2 射流中被激活。在 0.2 ms-1 的移动空气中,在 10 分钟试验中观察到 3.45 ± 0.49 次着陆的平均值 ± SE(每次试验 5 只蚊子),而在静止空气中记录了 6.50 ± 0.96 次着陆。此外,在移动空气中的任何时候,珠子上记录了 1.45 ± 0.31 只蚊子(个人着陆与多次着陆的衡量标准),而在静止空气中为 3.10 ± 0.31。迎风飞行到移动空气中的珠子在着陆前立即通过飞行的角航向证明,而在静止空气中接近珠子的方向是随机的。移动空气中首次着陆前的平均 ± SE 延迟为 226.7 ± 17.98 秒,而静止空气中为 122.5 ± 24.18 秒。考虑了用于在静止空气中近距离定位潜在宿主的策略。
更新日期:2012-02-13
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