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Table 1.

Effect of sucrose concentration on forager thoracic temperature at the feeder

Sucrose concentration
Temperature (°C)
Regression
mol l−1%ΔTthTthTaTthvs TaANOVAFN (%)N
0.5 16 4.9±2.7 29.7±2.7 24.7±1.6 y=15.5+0.57x F1,248=29.5, P<0.0001, R2=0.11 20.5±9.9 250 
1.0 31 5.5±2.5 29.6±2.8 24.2±2.4 y=13.7+0.66x F1,374=165.1, P<0.0001, R2=0.31 35.1±13.5 376 
1.5 34 6.8±2.7 31.7±2.2 24.9±1.5 NS F1,248=0.02, P=0.89, R2<0.0001 42.1±15.0 250 
2.0 41 7.3±2.7 32.0±2.2 24.7±1.4 NS F1,248=2.3, P=0.13, R2=0.009 52.1±17.6 250 
2.5 65 7.7±2.3 31.6±2.4 23.9±1.9 y=18.8+0.53x F1,495=114.6, P<0.0001, R2=0.19 61.0±21.4 497 
Sucrose concentration
Temperature (°C)
Regression
mol l−1%ΔTthTthTaTthvs TaANOVAFN (%)N
0.5 16 4.9±2.7 29.7±2.7 24.7±1.6 y=15.5+0.57x F1,248=29.5, P<0.0001, R2=0.11 20.5±9.9 250 
1.0 31 5.5±2.5 29.6±2.8 24.2±2.4 y=13.7+0.66x F1,374=165.1, P<0.0001, R2=0.31 35.1±13.5 376 
1.5 34 6.8±2.7 31.7±2.2 24.9±1.5 NS F1,248=0.02, P=0.89, R2<0.0001 42.1±15.0 250 
2.0 41 7.3±2.7 32.0±2.2 24.7±1.4 NS F1,248=2.3, P=0.13, R2=0.009 52.1±17.6 250 
2.5 65 7.7±2.3 31.6±2.4 23.9±1.9 y=18.8+0.53x F1,495=114.6, P<0.0001, R2=0.19 61.0±21.4 497 

Tth, thoracic temperature; Ta, air temperature; FN, normalized forager census count.

Values are means ± s.d.

Percentage sucrose concentration by mass (g sucrose 100 g−1 solution) obtained from Bubnik et al.(Bubnik et al., 1995).

Although a significant colony effect was found for the relationship betweenΔ Tth and sucrose concentration, we provide the average values here as a simplified reference because inter-colony differences were fairly minor.

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