Figure 2.

Single-sex groups of flies that had been previously exposed either to DCV or to a sterile Ringers solution were tested in a ‘no-risk’ environment (choice between 2 clean vials; light gray) or a ‘high-risk’ environment (choice between a clean vial and a DCV-contaminated vial; black). The motivation to seek out a food source, measured as the proportion of flies in the cage that landed on any of the provided food sources, increased over time (A). (B) shows the average motivation across the whole observation period for each combination of fly sex, prior DCV exposure and current exposure risk (‘no-risk’ environment (light gray) or a ‘high-risk’ environment (black). Data show means ± SEM.