Influence of the spatial distribution of human hosts and large size containers on the dispersal of the mosquito Aedes aegypti within the first gonotrophic cycle
Influence of the spatial distribution of human hosts and large size containers on the dispersal of the mosquito Aedes aegypti within the first gonotrophic cycle
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DOI：
10.1111/j.1365-2915.2009.00851.x
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发表时间：
2010-03-01
影响因子：
1.9
通讯作者：
Lourenco-de-Oliveira, R.
中科院分区：
文献类型：
--
作者：
Maciel-de-Freitas, R.;Souza-Santos, R.;Lourenco-de-Oliveira, R.
埃及伊蚊Aedes aegypti（L.）（双翅目：蚊类（Culicidae）的扩散能力较短，其扩散受羽化或释放点周围产卵点的影响。在本文中，我们观察了大型集装箱和人类宿主的空间异质性对Ae的累积飞行方向的影响。第一个生殖营养周期中的埃及雌性，检验它们聚集在资源丰富地区的假设，即每个居住地有更高密度的大型集装箱和/或人的地方。我们分析了在巴西里约热内卢的两个登革热流行区进行的蛹调查和标记-释放-再捕获实验（释放非血液喂养的雌性）的数据：Tubiacanga（郊区，人口密度为337人/公顷）和Favela do Amorim（贫民窟，人口密度为901人/公顷）。在这两个地区，三个不同的释放队列的主机寻求女性表现出整体不均匀和广泛的分散从他们的释放点在1-2天后释放。在释放后4-5天，预计许多被释放的雌性蚊子将怀孕，在Tubiacanga，大多数蚊子是在容器/房舍密度相对较高的地区收集的，与居民/房屋的密度无关，而在Favela do Amorim，几乎一半的捕获蚊子是在资源相对贫乏的地区收集的。虽然，虽然不同地点的埃及伊蚊传播模式各不相同，但总体而言，从释放点出发的距离和累积飞行方向与容器和宿主的密度相关，在Tubiacanga比在Favela do Amorim更为明显。
It is generally accepted that Aedes aegypti (L.) (Diptera: Culicidae) has a short dispersal capacity, and that displacement can be influenced by the availability of oviposition sites in the surroundings of emergence or release sites. In the present article, we observed the influence of spatial heterogeneity of large containers and human hosts on the cumulative flight direction of Ae. aegypti females during the first gonotrophic cycle, testing the hypothesis that they aggregate in resource-rich areas, i.e. where there are higher concentrations of large containers and/or humans per habitation. We analysed data from pupal surveys and mark-release-recapture experiments (non-blood-fed females were released) carried out in two dengue endemic neighbourhoods of Rio de Janeiro, Brazil: Tubiacanga (a suburb, with a human density of 337 inhabitants/ha) and Favela do Amorim (a slum, with a human density of 901 inhabitants/ha). In both areas, host-seeking females of three different release cohorts showed an overall non-uniform and extensive dispersal from their release point within 1-2 days post-release. At 4-5 days post-release, when many of the released females would be expected to be gravid, in Tubiacanga most mosquitoes were collected in areas with a relatively higher density of containers/premise, independently of the density of residents/house, whereas in Favela do Amorim, almost half of the captured mosquitoes were collected in relatively resource-poorer areas. Although Ae. aegypti dispersal patterns varied between sites, overall the distances travelled from the release point and the cumulative flight directions were correlated with the density of containers and hosts, more markedly in Tubiacanga than in Favela do Amorim.