Climate and geographic trends in hatch delay of the treehole mosquito, Aedes triseriatus Say (Diptera: Culicidae).
Climate and geographic trends in hatch delay of the treehole mosquito, Aedes triseriatus Say (Diptera: Culicidae).
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树洞蚊子三列伊蚊（双翅目：蚊科）孵化延迟的气候和地理趋势。
DOI：
10.1111/j.1948-7134.2009.00015.x
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发表时间：
2009
期刊：
影响因子：
--
通讯作者：
Livdahl,Todd
中科院分区：
文献类型：
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作者：
Khatchikian,CamiloE;Dennehy,JohnJ;Vitek,ChristopherJ;Livdahl,Todd
三列伊蚊的卵在被水淹没时会被刺激孵化，但同一批蚊子中只有一小部分卵会在任何给定的刺激下孵化。在沙漠植物、桡足类、轮虫、昆虫和许多其他物种中也观察到类似的孵化或发芽模式。赌注对冲理论认为，父母错开后代出现在脆弱的生命史阶段，以避免灾难性的生殖失败。ForAe.三列蚊是一种在树洞里繁殖的蚊子，一旦整个窝蚊孵化出来，父母的所有后代在严重干旱的情况下都很容易灭绝。自然选择很可能偏爱那些采取赌注对冲策略的父母，在这种策略中，生殖失败的风险随着时间的推移而分布。考虑到树洞蚊子，赌注对冲理论可用于预测孵化延迟与干旱的可能性正相关。为了验证这个预测，我们收集了Ae。triseriatus从栖息地，在平均年降水量变化很大，并暴露在实验室中的几个孵化刺激。在这里，我们报告说，正如预测，Ae。来自高降水区的tristeriatuseggs比低降水区的孵化延迟少。这种策略可能允许。triseriatus是一个非常重要的生态系统，可以应对其广泛的地理范围内所面临的各种气候条件。
Eggs ofAedes triseriatusmosquitoes are stimulated to hatch when inundated with water, but only a small fraction of eggs from the same batch will hatch for any given stimulus. Similar hatching or germination patterns are observed in desert plants, copepods, rotifers, insects, and many other species. Bet hedging theory suggests that parents stagger offspring emergence into vulnerable life history stages in order to avoid catastrophic reproductive failures. ForAe. triseriatus, a treehole breeding mosquito, immediate hatching of an entire clutch leaves all of the parent's progeny vulnerable to extinction in the event of a severe drought. Natural selection has likely favored parents that pursued a bet hedging strategy where the risk of reproductive failure is distributed over time. Considering treehole mosquitoes, bet hedging theory could be used to predict that hatch delay would be positively correlated with the likelihood of drought. To test this prediction, we collectedAe. triseriatusfrom habitats that varied widely in mean annual precipitation and exposed them to several hatch stimuli in the laboratory. Here we report that, as predicted,Ae. triseriatuseggs from high precipitation regions showed less hatch delay than areas of low precipitation. This strategy probably allowsAe. triseriatusto cope with the wide variety of climatic conditions that it faces in its extensive geographical range.