Figure 6.

Heat seeking of Culex mosquitoes exposed to pulsed CO₂ at low or high concentrations. (A). Mean proportion of mosquito landings on the ambient (23 °C; dashed line) and warm (30–50 °C; solid line) Peltier elements in the presence and absence of CO₂ at concentrations of 2100 ppm (left) and 30,000 ppm (right). The shaded region around the mean denotes the 95% confidence interval. (B). Schematic representation of Peltier elements’ temperatures, both ambient (dashed line) and warm (solid line), as a function of time in the heat-seeking assay. Vertical gray bars denote the 2-min CO₂ pulses that accompanied the thermal stimuli in the assay. Eight replicates (n = 15) per condition per species have been used.