Effect of sucrose concentration on forager thoracic temperature at the feeder
| Sucrose concentration . | . | Temperature (°C) . | . | . | Regression . | . | . | . | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| mol l−1 . | % . | ΔTth . | Tth . | Ta . | Tthvs Ta . | ANOVA . | FN (%) . | 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 . | % . | ΔTth . | Tth . | Ta . | Tthvs Ta . | ANOVA . | FN (%) . | 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.