傍晚时分,巴西东北部的按蚊寻找宿主的活动。

IF 2.1 3区 农林科学 Q1 ENTOMOLOGY Journal of Medical Entomology Pub Date : 2023-09-12 DOI:10.1093/jme/tjad071
Benedita Maria Costa-Neta, Francisca Claudia da Silva de Sousa, Eudimara Carvalho de Araújo, Joany da Costa Viana, Jefferson Mesquita Brito, Francinaldo Soares Silva
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引用次数: 0

摘要

研究寻找按蚊宿主的时间对于了解蚊子的生态、行为以及在疾病传播中可能发挥的作用非常重要。为了研究按蚊在黄昏时分寻找宿主的活动和月光的影响,在巴西塞拉多地区的一个牲畜区用光阱收集了按蚊。陷阱(Silva陷阱)被放置在海拔1.5米的动物围栏旁边。这项研究分为两个实验:第一个实验(12个晚上)包括两个诱捕期,一个从下午6点到7点,另一个从晚上7点到早上6点,第二个实验(16个晚上)根据三个黄昏阶段(民用:下午6点至6点20分;航海:下午6时26分至6时40分;天文:晚上6点至7点)分为三个20分钟的时间间隔。总共发现了2815只按蚊和9种。主要种类为三角按蚊(An.argyritaris)、戈氏按蚊(An.goeldii)和伊凡斯按蚊(An.evanse)。寻找宿主的蚊子在日落后的第一个小时更频繁地活动,在第二个20分钟的时间间隔达到显著峰值。之后,从天文黄昏开始,观察到个体数量减少。月光对按蚊夜间飞行活动没有影响。通过使用基于LED的无源光阱,证明了按蚊在夜间到达血液喂养点的时间,这可能是疟疾媒介控制干预的关键时间窗口。
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The evening crepuscular host-seeking activity of Anopheles mosquitoes in northeast Brazil.

Studies on the timing of anopheline host-seeking are important for understanding mosquito ecology, behaviors, and possible role in disease transmission. To study the evening crepuscular host-seeking activity of anophelines and the effects of moonlight, anopheline mosquitoes were collected with light traps settled in a livestock area in the Brazilian Cerrado region. Traps (Silva traps) were placed next to animal enclosures at 1.5 m asl. The research was divided in 2 experiments: the first experiment (12 nights) comprised 2 trapping periods, one from 6 PM to 7 PM and one from 7 PM to 6 AM, and the second experiment (16 evenings) divided in three 20-min intervals based on the 3 twilight phases (civil: 6-6:20 PM; nautical: 6:20-6:40 PM; and astronomical: 6:40-7 PM). A total of 2,815 anopheline mosquitoes and 9 species were found. The main species were Anopheles triannulatus s.l., An. argyritarsis, An. goeldii, and An. evanse. Host-seeking mosquitoes were more frequently active during the first hour after sunset, with a significant peak in the second 20-min interval. After that, a decrease in the number of individuals was observed from the astronomical twilight onwards. Moonlight did not affect the evening flight activity of anophelines. By using LED-based passive light traps, the evening arrival time of anophelines at blood-feeding sites was demonstrated, and it may be a key time window for malaria vector control interventions.

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来源期刊
CiteScore
4.60
自引率
14.30%
发文量
207
审稿时长
3-8 weeks
期刊介绍: Journal of Medical Entomology is published bimonthly in January, March, May, July, September, and November. The journal publishes reports on all phases of medical entomology and medical acarology, including the systematics and biology of insects, acarines, and other arthropods of public health and veterinary significance. In addition to full-length research articles, the journal publishes Reviews, interpretive articles in a Forum section, Short Communications, and Letters to the Editor.
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