Data for 'Elevated developmental temperatures below the lethal limit reduce <i>Aedes aegypti </i>fertility'

<i>Aedes aegypti</i> mosquitoes are the principal vectors of dengue and continue to pose a threat to human health, with ongoing urbanization, climate change, and trade all impacting the distribution and abundance of this species. Hot periods are becoming increasingly common and their impacts on insect mortality have been well established, but they may have even greater impacts on insect fertility. In this study, we investigated the impacts of high temperatures on <i>Ae. aegypti</i> fertility both within and across generations. Mosquitoes developing under elevated temperatures exhibited higher critical thermal maxima (CTmax) reflecting developmental acclimation, but their fertility declined with increasing developmental temperature. In females, elevated developmental temperatures decreased fecundity while in males it tended to decrease egg hatch proportions and the proportion of individuals producing viable offspring. Rearing both sexes at 35°C increased fecundity in the subsequent generation but effects of elevated temperatures persisted across gonotrophic cycles within the same generation. Moreover, exposure of adults to 35°C further decreased fertility beyond the effects of developmental temperature alone. These findings highlight sub-lethal impacts of elevated temperatures on <i>Ae. aegypti</i> fertility and plastic responses to thermal stress within and across generations. This has significant implications for predicting the distribution and abundance of mosquito populations thriving in increasingly warmer environments.

埃及伊蚊（Aedes aegypti）是登革热的主要传播媒介，且持续对人类健康构成威胁；当前持续推进的城市化、气候变化以及国际贸易活动，均会对该物种的分布范围与种群丰度产生影响。高温事件正愈发频发，其对昆虫死亡率的影响已得到充分证实，但高温对昆虫繁殖力的影响或许更为显著。本研究针对高温对埃及伊蚊代内及跨代繁殖力的影响展开了系统探究。在高温环境下发育的埃及伊蚊，其临界高温上限（CTmax）更高，这体现了发育驯化效应，但随着发育阶段所处温度升高，蚊虫的繁殖力却呈下降趋势。对于雌性埃及伊蚊，发育阶段所处温度升高会降低其产卵量；而对于雄性个体，高温则会倾向于降低卵的孵化率以及可育后代的个体占比。将两性埃及伊蚊均置于35℃环境下饲养，会提升其后代一代的产卵量，但高温带来的影响会在同一世代的多个生殖营养周期中持续存在。此外，仅将成虫暴露于35℃环境中，会在发育阶段高温影响的基础上进一步降低其繁殖力。上述研究结果凸显了高温对埃及伊蚊繁殖力的亚致死效应，以及其在代内与跨代间对热胁迫产生的表型可塑性响应。这对于预测在愈发温暖的环境中繁衍的蚊虫种群的分布范围与种群丰度，具有重要的指导意义。

搜集汇总

背景与挑战

背景概述

该数据集提供了关于高温对埃及伊蚊繁殖力影响的研究数据，重点关注发育期和成年期高温的亚致死效应。研究发现，高温会降低雌蚊产卵量和雄蚊后代存活率，且影响可跨代持续，这对预测气候变化下蚊媒种群分布具有重要意义。