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Fig. 4 | Malaria Journal

Fig. 4

From: Host-seeking activity of a Tanzanian population of Anopheles arabiensis at an insecticide treated bed net

Fig. 4

Distribution maps of Anopheles arabiensis flight activity on and around untreated and treated bed nets. a Distribution map key showing region codes for different areas of the field of view. Regions 1–6 represent the surface of the bed net roof; 7 and 10 are the vertical surfaces at the head and foot ends; 8 and 9 are vertical side surfaces. Flight activity in the space around the net was assigned to regions 11–14. Regions 15 and 16 contain swooping activity (i.e. flight without net contact) occurring in front of the net, on the left (15) and right (16) sides of the field of view. b Density of total activity, i.e. in all behavioural modes (s/m2). c Distribution of physical contact with the net (in seconds), including resting mode, and brief mid-flight contact made during flight trajectories in the visiting and bouncing modes. (dg) Distribution of activity for each behavioural mode—swooping (d), visiting (e), bouncing (f), resting (g)—with values expressed as activity density (s/m2). Colour coding is specific to each image, as shown in the legend beneath each chart. Charts only include regions relevant to each behavioural category, hence the swooping chart (d) does not use net regions 1–10, and the resting chart (g) does not include the space around the net (regions 11–16). Although tests controlled for the orientation of the human bait in relation to the mosquito release point, all figures show the volunteer with the head on the left

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