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首页> 外文期刊>Journal of Medical Entomology >Larval habitat diversity and ecology of anopheline larvae in Eritrea
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Larval habitat diversity and ecology of anopheline larvae in Eritrea

机译：厄立特里亚按蚊幼虫的栖息地多样性和生态

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摘要

Studies on the spatial distribution of anopheline mosquito larvae were conducted in 302 villages over two transmission seasons in Eritrea. Additional longitudinal studies were also conducted at eight villages over a 24-mo period to determine the seasonal variation in anopheline larval densities. Eight anopheline species were identified with Anopheles arabiensis predominating in most of the habitats. Other species collected included: An. cinereus, An. pretoriensis, An. d'thali, An. funestus, An. squamosus, An. adenensis, and An. demeilloni. An. arabiensis was found in five of the six aquatic habitats found positive for anopheline larvae during the survey. Anopheles larvae were sampled predominantly from stream edges and streambed pools, with samples from this habitat type representing 91.2% (n = 9481) of the total anopheline larval collection in the spatial distribution survey. Other important anopheline habitats included rain pools, ponds, dams, swamps, and drainage channels at communal water supply points. Anopheline larvae were abundant in habitats that were shallow, slow flowing and had clear water. The presence of vegetation, intensity of shade, and permanence of aquatic habitats were not significant determinants of larval distribution and abundance. Larval density was positively correlated with water temperature. Larval abundance increased during the wet season and decreased in the dry season but the timing of peak densities was variable among habitat types and zones. Anopheline larvae were collected all year round with the dry season larval production restricted mainly to artificial aquatic habitats such as drainage channels at communal water supply points. This study provides important information on seasonal patterns of anopheline larval production and larval habitat diversity on a countrywide scale that will be useful in guiding larval control operations in Eritrea.
机译：在厄立特里亚的两个传播季节中，在302个村庄进行了按蚊蚊幼虫的空间分布研究。在24个月的时间内，还对八个村庄进行了纵向研究，以确定按蚊幼虫密度的季节性变化。在大多数生境中，发现了八种按蚊种，其中阿拉伯人按蚊占主导地位。收集的其他物种包括：电影院Pretoriensis，安达塔利Funestus，An。 squamosus adenensis和安。德美永尼。一个。在调查期间发现的六个水生生境中，有五个被发现为甲虫幼虫阳性。按蚊幼虫主要从河流边缘和河床池中取样，在空间分布调查中，这种栖息地类型的样本占按蚊幼虫总收集量的91.2％（n = 9481）。其他重要的按蚊栖息地包括公用供水点的雨水池，池塘，水坝，沼泽和排水渠。按蚊幼虫在浅水，缓慢流动且水清澈的生境中丰富。植被的存在，阴影的强度以及水生生境的持久性不是决定幼虫分布和丰度的重要因素。幼虫密度与水温呈正相关。幼虫的丰度在雨季增加，而在旱季减少，但是高峰密度的发生时间在生境类型和区域之间是可变的。全年收集按蚊幼虫，而旱季幼虫的生产主要限于人工水生生境，例如公共供水点的排水渠。这项研究在全国范围内提供了按蚊幼虫生产的季节性模式和幼虫栖息地多样性的重要信息，这将有助于指导厄立特里亚的幼虫控制活动。

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