Age composition and vertical distribution of mosquito populations in the Gambia, West Africa.
Age composition and vertical distribution of mosquito populations in the Gambia, West Africa.
复制标题
西非冈比亚蚊子种群的年龄构成和垂直分布。
DOI：
10.1093/jmedent/13.4-5.507
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发表时间：
1977
影响因子：
2.1
通讯作者：
T. Wilkes
中科院分区：
文献类型：
--
作者：
W. F. Snow;T. Wilkes
本文应用Polovodova和Detinova法测定了黑按蚊的年龄组成。和地中海库蚊这是在西非冈比亚的热带稀树草原上不同高度拍摄的。对于这两个物种的蚊子的平均年龄逐渐增加的高度。类似的趋势，表现为飞行和吸捕收集的安。Melas在地面至4.27m之间，吸捕和咬捕使An的捕获量达到9.15m。melas和Cx.海中鱼将年龄分级数据与使用高达9.15 m的吸捕器进行垂直分布研究的结果相结合，以估计每个高度下每个年龄段的蚊子相对数量。结果表明，各年龄组的安氏按蚊数量均高于其它年龄组。melas随高度下降，但这种下降对二胎和较老的昆虫不太明显，结果是较老的昆虫的比例随高度增加。未产和单产的Cx垂直分布呈双峰型。海栖性天敌的绝对数量随高度的增加而增加，在0.91和9.15 m处密度最大。
The techniques of Polovodova and Detinova were used to determine the age composition of samples of Anopheles melas Theo. and Culex thalassius Theo. taken at different heights in savanna in the Gambia, West Africa. For both species the mean age of mosquitoes increased progressively with height. Similar trends were shown by flight and suction-trap collections of An. melas between ground level and 4.27 m, and by suctiontrap and biting catches up to 9.15 m for An. melas and Cx. thalassius . The age-grading data were combined with the results of vertical distribution studies with suction traps up to 9.15 m to estimate the relative numbers of mosquitoes in each age class at each height. It was concluded that the numbers of all age classes of An. melas declined with height, but this decrease was less marked for biparous and older insects, with the result that the proportion of older insects increased with height. A bimodal pattern of vertical distribution was shown by nulliparous and uniparous Cx. thalassius , with density maxima 0.91 and 9.15 m, while the absolute numbers of triparous and older insects increased with height.