IRSS/Centre Muraz, BP 390, Bobo-Dioulasso, Burkina Faso.
IRSS/Centre Muraz, BP 390, Bobo-Dioulasso, Burkina Faso.
Acta Trop. 2014 Apr;132 Suppl:S35-41. doi: 10.1016/j.actatropica.2013.12.012. Epub 2013 Dec 24.
The swarming behaviour of natural populations of Anopheles arabiensis was investigated by conducting transect surveys on 10 consecutive days, around dusk, from March to April and from September to October 2012 in Dioulassoba, a district of Bobo-Dioulasso city in Burkina Faso (West Africa). Swarms were observed outside, around identified larval breeding sites on the banks of the Houet River, as well as in the open-air courtyards found at the centre of many homes in the region. Swarms were found to occur in open sunlit spaces, mostly located above physical or visual cues somehow visually distinct from the surrounding area. Overall 67 and 78 swarms were observed, respectively, during the dry season (March-April) and the rainy season (September-October) of 2012, between 1.5m and 4.5m above the ground at their centre. 964 mosquitoes were collected and analysed from dry season swarms, of which most were male, and all were An. arabiensis, as were the few resting mosquitoes collected indoors. Larvae collected from breeding sites found on the banks of the Houet River mostly consisted of An. arabiensis and only a minority of Anopheles coluzzii (formerly identified as An. gambiae M form). Of 1694 mosquitoes analysed from 78 swarms in the rainy season collections, a few An. gambiae (formerly known as An. gambiae S form) males were identified, and the remainders were An. arabiensis. The majority of larvae collected during the wet season from the same breeding sites were identified as An. arabiensis followed by An. coluzzii and An. gambiae. The same pattern of species composition was observed in resting mosquitoes, though the proportion of An. arabiensis was less overwhelming. These data support the conclusion that An. arabiensis is the most prevalent species in this area, though the difference in species composition when using different population sampling techniques is noteworthy. Further studies are required for more detailed investigations of male dispersal, feeding behaviour and mating patterns in this urban setting.
2012 年 3 月至 4 月和 9 月至 10 月期间，在布基纳法索（西非）博博-迪乌拉索市的迪欧拉索巴区，我们在黄昏时分连续 10 天进行了横断面调查，以研究阿拉伯按蚊自然种群的聚集行为。在胡埃特河岸边的已确定的幼虫滋生地周围，以及该地区许多家庭中心的露天庭院外观察到了蚊群。蚊群出现在阳光充足的开放空间，这些空间大多位于高出地面 1.5 米至 4.5 米的地方，这些地方在某种程度上与周围环境在视觉上有明显的区别。2012 年旱季（3 月至 4 月）和雨季（9 月至 10 月）分别观察到 67 次和 78 次蚊群，蚊群中心位置离地 1.5 米至 4.5 米。从旱季蚊群中收集并分析了 964 只蚊子，其中大多数是雄性，而且都是阿拉伯按蚊，从室内收集到的少数休息蚊子也是如此。从胡埃特河岸边的滋生地收集的幼虫大多是阿拉伯按蚊，只有少数库蚊（以前被鉴定为冈比亚按蚊 M 型）。从雨季 78 次蚊群收集的 1694 只蚊子中，鉴定出少数冈比亚按蚊（以前称为冈比亚按蚊 S 型）雄性，其余为阿拉伯按蚊。从同一滋生地在雨季收集的幼虫中，大多数被鉴定为阿拉伯按蚊，其次是库蚊和冈比亚按蚊。在休息蚊子中也观察到了相同的物种组成模式，尽管阿拉伯按蚊的比例不那么压倒性。这些数据支持以下结论，即阿拉伯按蚊是该地区最常见的物种，尽管使用不同的种群抽样技术时，物种组成存在差异。需要进一步研究以更详细地调查这种城市环境中的雄性扩散、摄食行为和交配模式。
