Figure 4
The results of the second experiment. Motor performance of individual bees in group one (brown circles; exposed to water vapour on days one to seven, always with the same odour), group two (grey triangles; exposed to water vapour on days one to seven, with the odour changed on day five), group three (orange squares; exposed to ethanol vapour on days one to seven, always with the same odour), group four (purple stars; exposed to ethanol vapour on days one to four and to water vapour on days five to seven, always with the same odour) and group five (yellow pentagons; exposed to ethanol vapour on days one to four and to water vapour on days five to seven, with the odour changed on day five). Lower performance indicates impaired movement. Shapes (circles, triangles, squares, stars and pentagons) 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 (brown circles) did not show any significant differences between days, similarly as group two (grey triangles). Group three (orange squares) showed steady low performance over time. Group four (purple stars) showed high improvement when, on day five, it was exposed to water instead of ethanol, in fixed odour conditions, and outperformed both control groups one and two (brown circles and grey triangles, respectively). Improvement matching the performance of the control groups was observed on day five in group five (yellow pentagons) when exposed to water instead of ethanol and when odour conditions were changed. The difference between group four (purple stars) and groups one, two and five (brown circles, grey triangles and yellow pentagons, respectively) observed on day five disappeared completely by day seven.
