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Background  Dengue is an arbovirus disease transmitted by two  Aedes  mosquitoes:  Ae. aegypti  and  Ae. albopictus . Virgin females of these two species generally show a bimodal and diurnal pattern of activity, with early morning and late afternoon peaks. Although some studies on the flight activity of virgin, inseminated and blood-fed  Ae. aegypti  females have been carried out under laboratory conditions, little is known about the effects of such physiological states on the locomotor activity of  Ae. albopictus  and  Ae. aegypti  females. The aim of this study was to analyze, under laboratory conditions, the effects of insemination and blood-feeding on the locomotor activity of  Ae. albopictus  and  Ae. aegypti  females under LD 12:12, at 25°C.    Methods  Both  Ae. albopictus  and  Ae. aegypti  females were obtained from established laboratory colonies. Control groups were represented by virgin/unfed  Ae. albopictus  and  Ae. aegypti  females. Experiments were conducted under laboratory conditions, using an activity monitor that registers individual activity every thirty minutes.    Results  Virgin/unfed  Ae. albopictus  and  Ae. aegypti  females showed a diurnal and bimodal pattern of locomotor activity, with peaks at early morning and late afternoon. Insemination and blood-feeding significantly decreased the locomotor activity of  Ae. aegypti  females, but inseminated/blood-fed  Ae. aegypti  and  Ae. albopictus  females showed a similar significant decrease on the locomotor activity compared to virgin/unfed females.    Conclusions  This study is the first demonstration of the effects of insemination and blood-feeding on the locomotor activity of  Ae. albopictus  and  Ae. aegypti  females under artificial conditions. Data suggest that  Ae. albopictus  and  Ae. aegypti  females respond in different ways to physiological status changes and such divergence between these two dengue vectors, associated with several ecological differences, could be related to the greater dengue vectorial capacity of  Ae. aegypti  in Americas in comparison to  Ae. albopictus .

parasites and vectors

Effects of insemination and blood-feeding on locomotor activity of Aedes albopictus and Aedes aegypti (Diptera: Culicidae) females under laboratory conditions