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Figure 3


Fig. 3. Feeding time (min) (A), crop load (mg) (B) and metabolic rates of foraging ants (µW) (C) as a function of five different nectar concentrations (1, 5, 10, 30 and 50%) and a flow-rate of 1.18 µl min–1. Values are means ± s.e.m. (N=13–17). Posteriori (Tukey test after one-way ANOVA): a,b, P<0.01; a,c and b,c, P<0.001; same letters do not differ significantly.