Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ecología, Genética y Evolución, Grupo de Estudio de Mosquitos, Buenos Aires, Argentina.
Universidad de Buenos Aires. Consejo Nacional de Investigaciones Científicas y Técnicas, Instituto de Ecología, Genética y Evolución de Buenos Aires (IEGEBA), Facultad de Ciencias Exactas y Naturales, Buenos Aires, Argentina.
Med Vet Entomol. 2021 Mar;35(1):97-105. doi: 10.1111/mve.12474. Epub 2020 Aug 22.
Aedes albopictus (Diptera: Culicidae) distribution is bounded to a subtropical area in Argentina, while Aedes aegypti (Diptera: Culicidae) covers both temperate and subtropical regions. We assessed thermal and photoperiod conditions on dormancy status, development time and mortality for these species from subtropical Argentina. Short days (8 light : 16 dark) significantly increased larval development time for both species, an effect previously linked to diapause incidence. Aedes albopictus showed higher mortality than Ae. aegypti at 16 °C under long day treatments (16 light : 8 dark), which could indicate a lower tolerance to a sudden temperature decrease during the summer season. Aedes albopictus showed a slightly higher percentage of dormant eggs from females exposed to a short day, relative to previous research in Brazilian populations. Since we employed more hours of darkness, this could suggest a relationship between day-length and dormancy intensity. Interestingly, local Ae. aegypti presented dormancy similar to Ae. albopictus, in accordance with temperate populations. The minimum dormancy in Ae. albopictus would not be sufficient to extend its bounded distribution. We believe that these findings represent a novel contribution to current knowledge about the ecophysiology of Ae. albopictus and Ae. aegypti, two species with great epidemiological relevance in this subtropical region.
白纹伊蚊（双翅目：蚊科）的分布范围局限于阿根廷的亚热带地区，而埃及伊蚊（双翅目：蚊科）则分布于温带和亚热带地区。我们评估了来自阿根廷亚热带地区的这些物种的休眠状态、发育时间和死亡率的热和光周期条件。短日（8 光：16 暗）显著延长了两种蚊的幼虫发育时间，这一效应先前与滞育发生率有关。在长日处理（16 光：8 暗）下，16°C 时，白纹伊蚊的死亡率高于埃及伊蚊，这可能表明在夏季突然降温时的耐受性较低。与巴西种群的先前研究相比，暴露于短日下的雌蚊产生的休眠卵的百分比略高。由于我们采用了更多的黑暗时间，这可能表明日长与休眠强度之间存在关系。有趣的是，当地的埃及伊蚊表现出与白纹伊蚊相似的休眠，这与温带种群一致。白纹伊蚊的最小休眠时间不足以扩展其有限的分布范围。我们认为这些发现代表了对白纹伊蚊和埃及伊蚊生态生理学的当前知识的新贡献，这两种蚊在该亚热带地区具有重要的流行病学意义。
