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Fig. 6. Relation of energy losses and gains expressed in µW for different nectar
flow-rates and concentrations. Energy expenditures are measured metabolic rate
of ant workers and the energy gain is calculated from the sucrose
concentration and flow rate delivery of sugar solution from the artificial
feeder. (a) 0.236 µl min1 flow rate and 1% sucrose
concentration, (b) 1.18 µl min1 and 1%, (c) 0.236 µl
min1 and 5%, (d) 1.18 µl min1 and 5%,
(e) 0.236 µl min1 and 30%, (f) 2.36 µl
min1 and 5%, (g) 1.18 µl min1 and 10%,
(h) 1.18 µl min1 and 30%, (i) 1.18 µl
min1 and 50%, and (j) 2.36 µl min1 and
30%. Note the logarithmic scale of the x-axis.