Cold season mortality and hatching behavior of Aedes aegypti L. (Diptera: Culicidae) eggs in Buenos Aires City, Argentina
Cold season mortality and hatching behavior of Aedes aegypti L. (Diptera: Culicidae) eggs in Buenos Aires City, Argentina
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DOI：
10.1111/j.1948-7134.2011.00145.x
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发表时间：
2011-06-01
影响因子：
1.7
通讯作者：
Schweigmann, Nicolas
中科院分区：
文献类型：
--
作者：
Fischer, Sylvia;Soledad Alem, Iris;Schweigmann, Nicolas
在温带地区，埃及伊蚊种群在产卵期度过寒冷的季节。在本工作中，我们研究了Ae的冷季死亡率。布宜诺斯艾利斯市埃及虫卵及其随后的孵化模式。卵在冬季(三个月)期间暴露在三个社区，位于里约拉普拉塔河的一个距离梯度上，与Ae的活动梯度一致。埃及伊蚊。结果表明，旱季死亡率(30.6%)低于热带地区。各地点的虫卵死亡率差异显著，最靠近里约拉普拉塔河的地点的卵子死亡率最高(50%)，最接近大陆的地点的卵子死亡率最小(9%)。实验后卵的孵化反应因地点不同而不同，第一次浸泡时，离河流最近的地点孵化出的蛋比例最高，而最接近大陆的地点比例最低。不同龄级的孵化比例也不同，老的(早产的)卵比新的(晚产的)卵孵化得晚。我们的研究结果首次提供了Ae.在南美洲温带地区埃及伊蚊的卵子死亡率，并支持蛋死亡率的差异与Ae丰度模式相关的假说。布宜诺斯艾利斯市的埃及人。媒介生态学杂志36(1)：94-99。2011年。
In temperate regions, populations of Aedes aegypti survive the cold season in the egg stage. In the present work, we studied the cold-season mortality of Ae. aegypti eggs and their subsequent hatching pattern in Buenos Aires city. Eggs were exposed during the winter season (three months) in three neighborhoods located along a gradient of distance toward the Rio de la Plata River, coincident with a gradient of activity of Ae. aegypti. Results showed mortalities lower (30.6%) than those from tropical regions during the dry season. Significant differences were detected among the egg mortalities of each site with a maximum value at the site nearest the Rio de la Plata River (50%), and a minimum value at the most continental site (9%). Post-experimental hatching response of eggs differed between sites, with the highest proportion of hatched eggs during the first immersion in the site nearest to the river and the lowest proportion in the most continental site. The hatching proportion also differed between age classes, with older (early-laid) eggs hatching later than new (late-laid) ones. Our results provide the first information of Ae. aegypti egg mortality in temperate South America and support the hypothesis that differences in egg mortality are associated with abundance patterns of Ae. aegypti in Buenos Aires city. Journal of Vector Ecology 36 (1): 94-99. 2011.