Fig.3. Haemolymph levels of various sugars versus metabolic rate for bees fed 15% sucrose solution (same individuals as in Fig.2A). Haemolymph samples were taken 15min after feeding ended. Each symbol represents one bee. Note the different scales on the ordinates. Total haemolymph sugar levels (C_Tot) decrease significantly with increasing metabolic rate _CO2 above 4.5mlCO₂h^-1 (see text).