Adaptation, isolation by distance and human-mediated transport determine patterns of gene flow among populations of the disease vector Aedes taeniorhynchus in the Galapagos Islands
Adaptation, isolation by distance and human-mediated transport determine patterns of gene flow among populations of the disease vector Aedes taeniorhynchus in the Galapagos Islands
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DOI：
10.1016/j.meegid.2011.09.009
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发表时间：
2011-12-01
影响因子：
3.2
通讯作者：
Goodman, Simon J.
中科院分区：
文献类型：
--
作者：
Bataille, Arnaud;Cunningham, Andrew A.;Goodman, Simon J.
黑盐沼蚊子（Aedes taeniorhynchus）是加拉帕戈斯群岛唯一的本地蚊子，也是加拉帕戈斯野生动物的主要疾病媒介。人们对它的人口结构知之甚少，也不知道它的动态如何受到群岛上人类存在的影响。我们使用微卫星数据来评估A.研究人员正在研究岛屿之间和岛屿内部的带喙虫基因流动，以确定蚊子传播的潜在障碍，并调查人类协助的蚊子在群岛之间的传播。研究结果表明，岛间迁移是A.带喙龙经常因距离而孤立出现。在群岛的主要港口发现了大量的岛屿间迁移，这强烈表明在岛屿之间发生了人为协助的蚊子传播，强调需要采取严格的控制措施，以避免疾病媒介在岛屿之间的传播。加拉帕戈斯无飞鸬鹚的丝虫感染率与其种群结构和迁徙方式有关。taeniorhynchus，提示A.在加拉帕戈斯群岛，带喙虫是这种节肢动物传播的寄生虫的重要媒介。因此，加拉帕戈斯的蚊子种群结构可能会影响蚊子传播的寄生虫种群动态，以及这些病原体对其宿主物种的影响。(C)2011爱思唯尔有限公司版权所有。
The black salt-marsh mosquito (Aedes taeniorhynchus) is the only native mosquito in the Galapagos Islands and potentially a major disease vector for Galapagos wildlife. Little is known about its population structure, or how its dynamics may be influenced by human presence in the archipelago. We used microsatellite data to assess the structure and patterns of A. taeniorhynchus gene flow among and within islands, to identify potential barriers to mosquito dispersal, and to investigate human-aided transport of mosquitoes across the archipelago. Our results show that inter-island migration of A. taeniorhynchus occurs frequently on an isolation by distance basis. High levels of inter-island migration were detected amongst the major ports of the archipelago, strongly suggesting the occurrence of human-aided transport of mosquitoes among islands, underlining the need for strict control measures to avoid the transport of disease vectors between islands. The prevalence of filarial nematode infection in Galapagos flightless cormorants is correlated with the population structure and migration patterns of A. taeniorhynchus, suggesting that A. taeniorhynchus is an important vector of this arthropod-borne parasite in the Galapagos Islands. Therefore mosquito population structure in Galapagos may have the potential to influence mosquito-borne parasite population dynamics, and the subsequent impacts of such pathogens on their host species in the islands. (C) 2011 Elsevier B.V. All rights reserved.