Figure 2
The schema of the second experiment. Treatment was conducted on five groups of bees, individually, once per day for seven consecutive days. Depending on the group and the day, one of two odours was delivered by pressing the syringe with a scented cotton plug inside, followed by exposure to water or ethanol on the treatment column (30 ml of either water or ethanol in the column). After treatment, on days four to seven, each individual bee was transferred into the test Petri dish with markings on top. There, its motor performance was assessed for two minutes (i.e., the number of markings crossed).
