Large Diurnal Temperature Fluctuations Negatively Influence Aedes aegypti (Diptera: Culicidae) Life-History Traits
Large Diurnal Temperature Fluctuations Negatively Influence Aedes aegypti (Diptera: Culicidae) Life-History Traits
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DOI：
10.1603/me11242
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发表时间：
2013-01-01
影响因子：
2.1
通讯作者：
Scott, Thomas W.
中科院分区：
文献类型：
--
作者：
Carrington, Lauren B.;Seifert, Stephanie N.;Scott, Thomas W.
泰国西北部登革热病毒传播的季节变化与昼夜温度波动的幅度呈负相关，尽管平均温度在各个季节之间没有显著变化。我们检验了这样一种假设，即与恒定的26℃温度相比，昼夜温度波动对登革热主要媒介埃及伊蚊（Aedes aegypti， L.）重要的流行病学生活史特征有负面影响。相对于恒定的26℃温度，较大的日温差（DTR）（约18℃日温差）延长了未成熟发育时间（约61 d），降低了幼虫存活率（约6%），并使成年雌性在吸血后14 d的生殖产量降低了25%。一个小的DTR（大约每天8摄氏度的摆动）对生活史特征的影响可以忽略不计或略微积极。我们的研究结果表明，大的DTR对蚊子生物学有负面影响，并且与假设一致，至少在一些地方，大的温度波动有助于登革热病毒传播的季节性减少。
Seasonal variation in dengue virus transmission in northwestern Thailand is inversely related to the magnitude of diurnal temperature fluctuations, although mean temperature does not vary significantly across seasons. We tested the hypothesis that diurnal temperature fluctuations negatively influence epidemiologically important life-history traits of the primary dengue vector, Aedes aegypti (L.), compared with a constant 26 degrees C temperature. A large diurnal temperature range (DTR) (approximate to 18 degrees C daily swing) extended immature development time (> 1 d), lowered larval survival (approximate to 6%), and reduced adult female reproductive output by 25% 14 d after blood feeding, relative to the constant 26 degrees C temperature. A small DTR (approximate to 8 degrees C daily swing) led to a negligible or slightly positive effect on the life history traits tested. Our results indicate that there is a negative impact of large DTR on mosquito biology and are consistent with the hypothesis that, in at least some locations, large temperature fluctuations contribute to seasonal reduction in dengue virus transmission.