Influence of temperature combined with photodynamic inactivation on the development of Aedes aegypti

Garbuio, Matheus; Lima, Alessandra Ramos; Silva, Kamila Jessie Sammarro; De Souza, Mariana; Inada, Natalia Mayumi; Dias, Lucas Danilo; Bagnato, Vanderlei Salvador

doi:10.1016/j.pdpdt.2024.103977

Cited by 2 publications

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Competition is the main factor, compared to non‐lethal threat of predation, affecting life‐history traits of Aedes aegypti (Diptera, Culicidae) mosquitoes

Cozzer,

de Brito,

Pazini

et al. 2024

Pest Management Science

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BACKGROUNDMosquito larvae coexist with different species of predators in small freshwater bodies. These environments can vary widely in terms of the amount of food and larval densities. Our objective was to understand the impacts of the non‐lethal threat of predation, combined with competition effects on Aedes aegypti development and adult life cycle. We tested the effects of two types of non‐lethal threat of predation, divided into nine combinations of larvae densities and resource availability on Ae. aegypti larvae. We measured their isolated and combined impacts on larval mortality rate, time to reach pupation, adult size, and lifespan.RESULTSReal non‐lethal threat of predation resulted in a higher larval mortality (71%), compromised the sizes of the individuals (−7%) and prolonged the lifespan (19%) compared to control. Simulated treatment, the anti‐predation behaviors led to an increase in larval mortality (21%) compared to the control treatment. Accelerating the larva's development time (−14%) to escape from a dangerous environment severely compromised the size of the individuals (−23%) and increased adult life (10%).CONCLUSIONThe scarcity of food resources, high levels of competition, and non‐lethal threat of predation as well, are effective stressors for Ae. aegypti. We observed that resources (food and space) were more important than predation risk for the fitness of the survivors. However, these stressors, individually or combined, can result in high larvae mortality, altered larval development and pupation, affecting the emergence of the adults, with small sizes and altered lifespan, ultimately reducing the fitness of the individuals. © 2024 Society of Chemical Industry.

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