Table 1 Results of mixed models testing the effects of individual, breeding and environmental factors on provisioning parameters
Effect | DFNum | DFDen | t | P | |
|---|---|---|---|---|---|
Percentage of larvae among the preys | |||||
Vresidual = 0.046 (N = 152). Vnestbox = 0.002 (N = 91). Varea = 0.025 (N = 13) |  | ||||
|  | Sex [M] | 1 | 88.1 | − 0.40 | 0.687 |
|  | Age [Y] | 1 | 134.3 | − 0.75 | 0.452 |
| Â | Body condition | 1 | 138.5 | 0.47 | 0.639 |
|  | Hatching date | 1 | 85.6 | − 0.71 | 0.479 |
|  | Brood size | 1 | 89.9 | − 0.05 | 0.957 |
| Â | Ambient temperature | 1 | 76.4 | 0.73 | 0.466 |
Feeding rate | |||||
Vresidual = 22.338 (N = 152). Vnestbox = 0.000 (N = 91). Varea = 3.688 (N = 13) |  | ||||
| Â | Sex [M] | 1 | 137.2 | 2.24 | 0.027 |
|  | Age [Y] | 1 | 138.0 | − 2.11 | 0.036 |
| Â | Body condition | 1 | 142.1 | 0.39 | 0.693 |
| Â | Hatching date | 1 | 140.3 | 0.96 | 0.337 |
|  | Brood size | 1 | 141.1 | 5.90 |  < 0.001 |
|  | Ambient temperature | 1 | 140.9 | − 0.12 | 0.905 |
|  | % Larvae among the preys | 1 | 132.0 | − 1.56 | 0.121 |
Mean prey number | |||||
Vresidual = 0.188 (N = 152). Vnestbox = 0.068 (N = 91). Varea = 0.039 (N = 13) |  | ||||
|  | Sex [M] | 1 | 82.7 | − 0.58 | 0.563 |
|  | Age [Y] | 1 | 124.0 | − 1.11 | 0.267 |
|  | Body condition | 1 | 132.4 | − 1.23 | 0.220 |
|  | Hatching date | 1 | 88.3 | − 2.65 | 0.009 |
| Â | Brood size | 1 | 90.6 | 0.24 | 0.808 |
| Â | Ambient temperature | 1 | 80.2 | 1.88 | 0.064 |
| Â | % Larvae among the preys | 1 | 127.7 | 2.90 | 0.004 |
Mean prey size | |||||
Vresidual = 0.112 (N = 152). Vnestbox = 0.002 (N = 91). Varea = 0.011 (N = 13) |  | ||||
| Â | Sex [M] | 1 | 90.4 | 0.63 | 0.529 |
| Â | Age [Y] | 1 | 137.3 | 1.92 | 0.056 |
| Â | Body condition | 1 | 142.7 | 1.38 | 0.168 |
| Â | Hatching date | 1 | 86.8 | 2.99 | 0.004 |
|  | Brood size | 1 | 93.5 | − 1.32 | 0.190 |
|  | Ambient temperature | 1 | 84.0 | − 1.55 | 0.123 |
|  | % Larvae among the preys | 1 | 122.5 | − 0.21 | 0.832 |