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Figure 2


Fig. 2. Effect of sucrose concentration on (A) forager body temperature as shown through a thermal image (Raytek ThermoView Ti30 infrared imager, FLW Inc., San Diego, CA, USA) during a preliminary investigation of colony 1 on sucrose concentrations of 1 mol l-1 or 2.5 mol l-1, (B) average {Delta}Tth, (C) proportion of foragers adjusted for different colony sizes (G1 and G2 refer to colonies groups 1 and 2, respectively; see text). (D) Average ambient air temperatures Ta during the trials are also shown. Values are means ± 1 s.d.