The overall aim of this project is to survey the behaviour of the three main vectors in Tanzania (Anopheles gambiae, An. arabienisis and An. funestus) to demonstrate that LLINs do not alter innate behavioural preferences of malaria vectors but rather increase crepuscular biting through phenotypic plasticity. We are also testing whether earlier feeding times arise from the predominance of younger, nulliparous mosquitoes following LLIN scale up and assess the impact of fine scale climatic and meteorological variations on biting behavior.

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