Efeito da qualidade da água no ciclo de vida e na atração para oviposição de Aedes aegypti (L.) (Diptera: Culicidae)

Eduardo B Beserra, Carlos R M Fernandes, José T de Sousa, Eraldo M de Freitas, Keliana D Santos
2010 Neotropical Entomology  
The present research aimed at evaluating the infl uence of the water quality in the life cycle and attraction of Aedes aegypti (L.) females to oviposit using different sources of water (raw sewage, effl uent of UASB reactor, effl uent of polishing lagoon, effl uent of anaerobic fi lter, rain water and de-chlorinated water). The immature development time and survivorship were evaluated on a daily basis in two distinct feeding systems (with and without food). The quality of the water was shown to
more » ... water was shown to affect the egg and larval stages, but not the pupal or the adult. In the absence of food, no development was observed in rain water and de-chlorinated water. Immature development was faster in water sources from raw sewage, although with the lowest survivorship (37.3%). Free-choice tests indicated that females preferred to lay most of their eggs on water collected from the effl uent of a UASB reactor, achieving the highest oviposition activity index (OAI) of 0.57. In non-choice tests, females laid larger batches of eggs in water collected from anaerobic fi lters (204.8 eggs), with the lowest number of eggs being laid on de-chlorinated water (37.3 eggs). It can be concluded that A. aegypti does not demonstrate any particular preference to lay eggs on clean water. This has serious implications for developing strategies to manage populations of this important vector in urban areas as it was shown to lay eggs and successfully develop on several different sources of water. Received 11/VII/08. Accepted 10/V/10.
doi:10.1590/s1519-566x2010000600026 pmid:21271073 fatcat:jazmkshqxzabbpb2cmcwisbpyi