Impact of temperature on survival, development and longevity of Aedes aegypti and Aedes albopictus (Diptera: Culicidae) in Phnom Penh, Cambodia.

IF 3.5 2区医学 Q1 PARASITOLOGY

Parasites & Vectors Pub Date : 2025-08-27 DOI:10.1186/s13071-025-06892-y

Bros Doeurk, Sokkeang Leng, Zanory Long, Pierre-Olivier Maquart, Sébastien Boyer

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Abstract

Background: Aedes aegypti and Ae. albopictus are primary vectors of dengue virus in Cambodia, distributed throughout the country. Climate change is predicted to affect the relative density of these two species, but there is a lack of studies evaluating the impact of temperature on populations of these two species in this region. This study investigates the impact of temperature on the survival, development and longevity of Ae. aegypti and Ae. albopictus from populations collected in Phnom Penh, Cambodia.

Methods: Aedes aegypti and Ae. albopictus populations were collected in Phnom Penh. The experiment was conducted in a climatic chamber with temperatures ranging from 15 °C to 40 °C, with a 5 °C increment between each treatment. Bionomic parameters from the F2 egg hatching rate to the number of F3 eggs produced at each temperature treatment were measured.

Results: Temperature significantly influenced all life history traits of Ae. aegypti and Ae. albopictus. The highest egg hatching rates were observed at 25 °C for Ae. aegypti (97.97%) and 20 °C for Ae. albopictus (90.63%). Larvae of both species could not survive beyond the first stage at 40 °C. During immature stages, development time decreased at higher temperature (35 °C), but mortality was increased. Female longevity peaked at 25 °C for Ae. aegypti (66.7 days) and at 20 °C for Ae. albopictus (22.6 days), with males having significantly shorter lifespans. In addition, the optimal temperature for female survival is predicted higher in Ae. aegypti than in Ae. albopictus, at 27.1 °C and 24.5 °C, respectively. Wing length increased at lower temperatures, with Ae. aegypti consistently longer than Ae. albopictus at 15 °C and 35 °C. Blood-feeding rates were highest at 30 °C for Ae. aegypti (61.0%) and at 25 °C for Ae. albopictus (52.5%).

Conclusion: Aedes albopictus appears better adapted to lower temperatures, whereas Ae. aegypti is better adapted to higher temperatures. Warmer temperatures accelerate mosquito development but also increased mortality and reduced adult longevity, which could influence their ability to transmit pathogens. These findings highlight the critical role of temperature in mosquito biology and emphasize the potential impact of climate change on dengue transmission dynamics in the future.

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温度对柬埔寨金边地区埃及伊蚊和白纹伊蚊生存、发育和寿命的影响

背景：埃及伊蚊和伊蚊；白纹伊蚊是柬埔寨登革热病毒的主要传播媒介，分布在全国各地。预测气候变化会影响这两种物种的相对密度，但缺乏温度对该地区这两种物种种群影响的研究。研究了温度对伊蚊的生存、发育和寿命的影响。埃及伊蚊和伊蚊。从柬埔寨金边收集的种群中提取白纹伊蚊。方法：选取埃及伊蚊和白纹伊蚊。在金边收集白纹伊蚊种群。实验在温度范围为15°C至40°C的气候室内进行，每次处理之间增加5°C。测定了各温度处理下F2卵的孵化率和F3卵的产蛋量等生物学参数。结果：温度对白纹伊蚊生活史性状有显著影响。埃及伊蚊和伊蚊。蚊。在25°C时卵孵化率最高。埃及伊蚊（97.97%）；蚊(90.63%)。在40℃条件下，两种幼虫均不能存活超过第一阶段。在未成熟阶段，温度越高（35℃），发育时间越短，但死亡率越高。雌蚊的寿命在25°C时达到顶峰。埃及伊蚊（66.7天）和伊蚊（20°C）；白纹伊蚊（22.6天），雄性寿命明显较短。此外，预测雌虫存活的最适温度在伊蚊中较高。埃及伊蚊比伊蚊多。白纹伊蚊，温度分别为27.1℃和24.5℃。温度越低，翅长越长。埃及伊蚊一直比伊蚊长。白纹伊蚊在15°C和35°C。伊蚊的采血率在30℃时最高。埃及伊蚊（61.0%）；蚊(52.5%)。结论：白纹伊蚊表现出较好的低温适应能力；埃及伊蚊更能适应高温。气温升高加速了蚊子的发育，但也增加了死亡率，缩短了成年蚊子的寿命，这可能会影响它们传播病原体的能力。这些发现强调了温度在蚊子生物学中的关键作用，并强调了未来气候变化对登革热传播动力学的潜在影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Parasites & Vectors 医学-寄生虫学

CiteScore

6.30

自引率

9.40%

发文量

433

审稿时长

1.4 months

期刊介绍： Parasites & Vectors is an open access, peer-reviewed online journal dealing with the biology of parasites, parasitic diseases, intermediate hosts, vectors and vector-borne pathogens. Manuscripts published in this journal will be available to all worldwide, with no barriers to access, immediately following acceptance. However, authors retain the copyright of their material and may use it, or distribute it, as they wish. Manuscripts on all aspects of the basic and applied biology of parasites, intermediate hosts, vectors and vector-borne pathogens will be considered. In addition to the traditional and well-established areas of science in these fields, we also aim to provide a vehicle for publication of the rapidly developing resources and technology in parasite, intermediate host and vector genomics and their impacts on biological research. We are able to publish large datasets and extensive results, frequently associated with genomic and post-genomic technologies, which are not readily accommodated in traditional journals. Manuscripts addressing broader issues, for example economics, social sciences and global climate change in relation to parasites, vectors and disease control, are also welcomed.