Mosquito larval habitats in a semiarid ecosystem in Eritrea:: Impact of larval habitat management on Anopheles arabiensis population
Mosquito larval habitats in a semiarid ecosystem in Eritrea:: Impact of larval habitat management on Anopheles arabiensis population
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DOI：
10.4269/ajtmh.2007.76.103
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发表时间：
2007-01-01
影响因子：
3.3
通讯作者：
Novak, Robert
中科院分区：
文献类型：
--
作者：
Shililu, Josephat;Mbogo, Charles;Novak, Robert
本研究调查了幼虫管理的影响和幼虫生产力在厄立特里亚，半干旱生态系统的时间变化。研究结果显示，蚊子主要在河床水塘全年滋生。在河床水塘等短暂的自然水生生境中，阿拉伯按蚊的生产量全年都很高，与降雨量呈负相关（r =-0.288，P = 0.047）。高密度的An。在威尔斯和公共供水点的运河和排水沟中也记录到阿拉伯虫幼虫。众多的供水点和威尔斯井成为人们聚集的按蚊来源，有助于维持疟疾的传播。幼虫产量与成虫羽化密度呈显著正相关（r = 0.365，P = 0.011）。本研究的结果进一步表明，在研究村实施幼虫控制策略显著降低了媒介生产力，如幼虫（F = 24.919，df = 1，178，P < 0.001）和成虫。在24个月的研究期间，处理部位的阿拉伯树胶密度（F = 3.052，df = 1，119，P = 0.014）。这种半干旱幼虫管理模式的结果表明，1）以栖息地识别、绘图和监测为支持的幼虫管理是管理疟疾病媒的可行策略，2）在这种半干旱生态系统中，应特别关注沿着河床的高产幼虫栖息地和其他因人类活动而具有周期性重要性的栖息地，和3）开展公共宣传和提高社区的认识，使其参与控制成年前阶段的按蚊，是取得成功的关键。
This study investigated the impact of larval management and the temporal variation in larval productivity in Eritrea, a semiarid ecosystem. Results of this study show that mosquito breeding persists throughout the year mainly in stream bed pools. Anopheles arabiensis production in the ephemeral natural aquatic habitats such the streambed pools was high throughout the year and negatively associated with rainfall (r = -0.288, P = 0.047). High densities of An. arabiensis larvae were also recorded from canals and drainage channels at wells and communal water supply points. The numerous water supply locations and wells help sustain malaria transmission by serving as sources of anophelines where people aggregate. There was a strong association between larval production and adult emergent densities (r = 0.365, P = 0.011). The results of this study further show that implementation of larval control strategies in the study villages significantly reduced vector productivity as measured by both larval (F = 24.919, df = 1,178, P < 0.001) and adult An. arabiensis densities (F = 3.052, df = 1,119, P = 0.014) in the treated sites over the 24-month study period. The results of this semiarid larval management model suggests that 1) larval management backed by habitat identification, mapping, and surveillance is a feasible tactic for managing malaria vectors, 2) a special focus in such semiarid ecosystems should be targeted to the highly productive larval habitats along stream beds and others of periodic importance derived from human activities, and 3) public information and sensitization of communities to participate in controlling the pre-adult stages of anopheline mosquitoes is central for success.