Figure 3
The results of the first experiment. Motor performance of individual bees in group one (green circles; exposed to water vapour every day), group two (blue triangles; exposed to water vapour on days one to four and then to ethanol vapour on day five), group three (magenta squares; exposed to ethanol vapour every day) and group four (red stars; exposed to ethanol vapour on days one to four and then to water vapour on day five). Lower performance indicates impaired movement. Shapes (circles, triangles, squares and stars) denote mean values, and whiskers denote 95% confidence intervals. Letters denote the results of the post hoc comparisons (different letters show significant differences). Group one (green circles) did not show any significant differences between days, whereas group two (blue triangles) showed a significant drop in performance when exposed to ethanol for the first time on the last day of the experiment. Group three (magenta squares) showed low performance with steady significant improvement over time, similar to group four (red stars), which showed the same low performance with steady and significant improvement until it was exposed to water instead of ethanol on the last day of the experiment. At that time, group four displayed a marked increase, matching its performance to group one (green circles).
