Fig. 3. (A,D,G) Dance probability before (open bars) and after (hatched bars) the foragers' food-unloading. (B,E,H) Dance strength, i.e. number of round circuits, before (open bars) and after (hatched bars) the food-unloading. (C,F,I) Maximum number of simultaneous food-receivers (grey open bars) and total number of food-receivers (grey hatched bars) involved in the foragers' food-unloading (see Materials and methods for details). Data correspond to marked bees that foraged individually on the IF. Results are shown for the two different reward conditions (Low: 3 µl min^-1, High: 90 µl min^-1) offered at the GF throughout the three different experimental series: A,B,C constant series (N₁=15, N₂=17), D,E,F decreasing series (N=7), and G,H,I increasing series (N=6). See Results for details on statistics. Values are means ± s.e.m.; ^*P<0.05, ^**P<0.01, ^***P<0.001.