Pazini Amanda Cristina Ninov, Cozzer Gilberto Dinis, de Brito Raquel, Magro Jacir Dal, Lima-Rezende Cássia Alves, Albeny-Simões Daniel, Rezende Renan Souza
Postgraduate Program in Environmental Sciences, Communitarian University of Chapecó Region - Unochapecó, Chapecó, Santa Catarina, Brazil.
Postgraduate Program in Ecology, Federal University of Pará (UFPA), Belém, Pará, Brazil.
Neotrop Entomol. 2025 May 31;54(1):70. doi: 10.1007/s13744-025-01284-4.
Understanding the complex interplay between environmental factors and mosquito populations is crucial for effective vector-borne disease control. In this study, we investigated the combined effects of temperature and Ateleia glazioviana toxicity on the development and survival of Aedes aegypti, utilizing artificial microcosms. The first experiment used A. aegypti eggs, with microcosms varying by room temperature (18 °C and 25 °C) and exposure to A. glazioviana leaves, either without prior incubation or with a 14-day pre-incubation period. The second experimental design involved introducing larvae, with microcosms varying by room temperature (18 °C and 25 °C) and exposure to A. glazioviana leaves after a 14-day incubation period. For both experiments, we used only ultra-pure water and food for the control. Our results demonstrate that plant leachate toxicity had a more pronounced effect than temperature, with increased toxicity levels driving higher larval mortality rates. This reduction in competition among surviving larvae led to the development of larger individuals, consistent with the temperature-size rule. Notably, the impact of leachate toxicity was most significant when A. aegypti was exposed during the egg stage. Additionally, we observed that elevated temperatures were linked to increased wing asymmetry and reduced body size, suggesting heightened developmental instability under environmental stress. These findings have important implications for biological control strategies, emphasizing the need for pre-emptive measures before oviposition. Moreover, they challenge the commonly held assumption that temperature alone is the dominant factor shaping A. aegypti populations in Neotropical regions, highlighting the complex role of other ecological stressors.
了解环境因素与蚊子种群之间的复杂相互作用对于有效的媒介传播疾病控制至关重要。在本研究中，我们利用人工微宇宙研究了温度和格拉齐奥阿特列亚叶毒性对埃及伊蚊发育和存活的综合影响。第一个实验使用埃及伊蚊卵，微宇宙在室温（18°C和25°C）以及是否接触格拉齐奥阿特列亚叶方面有所不同，接触方式为未经预先孵化或经过14天的预孵化期。第二个实验设计涉及引入幼虫，微宇宙在室温（18°C和25°C）以及经过14天孵化期后接触格拉齐奥阿特列亚叶方面有所不同。对于这两个实验，我们在对照中仅使用超纯水和食物。我们的结果表明，植物渗滤液毒性比温度具有更显著的影响，毒性水平的增加导致更高的幼虫死亡率。存活幼虫之间竞争的减少导致个体发育得更大，这与温度 - 体型规则一致。值得注意的是，当埃及伊蚊在卵期接触时，渗滤液毒性的影响最为显著。此外，我们观察到温度升高与翅膀不对称增加和体型减小有关，这表明在环境压力下发育不稳定性增强。这些发现对生物控制策略具有重要意义，强调在产卵前采取先发制人措施的必要性。此外，它们挑战了普遍认为仅温度是塑造新热带地区埃及伊蚊种群的主导因素这一假设，突出了其他生态压力源的复杂作用。
