QUIESCENCE IN Aedes aegypti (DIPTERA: CULICIDAE): ADAPTIVE FUNDAMENTALS AND REDOX IMPLICATIONS

Abstract

Embryonic quiescence in Aedes aegypti represents a fundamental adaptive mechanism that contributes to the species' persistence in environments characterized by high climatic variability and ecological instability. In this chapter, quiescence is addressed from a theoretical and integrative perspective, being characterized as a dynamic, reversible, and environmentally regulated physiological state, sustained by structural modifications and metabolic and biochemical adjustments that favor the maintenance of embryonic integrity during prolonged exposure to adverse conditions, particularly desiccation. Ecological and epidemiological aspects associated with this phenomenon are examined, as well as its implications for the vector's population dynamics and the limitations observed in conventional control strategies. Additionally, the chapter analyzes redox homeostasis as a relevant functional component of the adaptation associated with quiescence, emphasizing the coordinated action of enzymatic antioxidant systems and metabolic pathways involved in regulating the balance between the generation and neutralization of reactive oxygen species. It is recognized, however, that quiescence in arthropods, including Aedes aegypti, constitutes a biologically complex and still incompletely characterized phenomenon, and it is not possible to exhaust its multiple dimensions in a single conceptual approach. In this sense, the articulation proposed in this chapter offers an interpretative synthesis that contributes to the understanding of the central mechanisms associated with embryonic survival, providing theoretical support for future investigations. By integrating evidence from different domains of biology, the chapter broadens the understanding of the processes that sustain the persistence of Aedes aegypti in natural and anthropized environments, highlighting the relevance of the embryonic phase as a structuring element of the ecological and epidemiological dynamics of the vector.