Table 2. Climate models obtaining substantial support (ΔAICc≤2) and the base temporal model (‘Year + Age’) describing male arrival date (n = 210) and female clutch initiation dates (n = 177) for yellow warblers in Revelstoke, British Columbia.
Model # | Period | Variables | r2 | K | AIC.c | ΔAICc | ωi |
Male Arrival: | |||||||
3b | Migration | U-WIND + AGE + U-WIND*AGE | 0.21 | 5 | 1452.88 | 0 | 0.535 |
1b | Winter | SOIMAY-AUG + AGE + SOIMAY-AUG *AGE | 0.20 | 5 | 1453.85 | 0.98 | 0.328 |
- | - | YEAR+AGE | 0.18 | 9 | 1464.32 | 11.44 | 0.002 |
Female clutch initiation date: | |||||||
3b | Migration | U-WIND + AGE + U-WIND*AGE | 0.16 | 5 | 1194.89 | 0 | 0.289 |
5a | Migration | U-WIND + V-WIND + AGE | 0.15 | 5 | 1195.00 | 0.11 | 0.273 |
3a | Migration | U-WIND + AGE | 0.14 | 4 | 1195.82 | 0.93 | 0.181 |
5b | Migration | U-WIND + V-WIND + AGE + U-WIND*AGE +V-WIND*AGE | 0.16 | 7 | 1196.47 | 1.58 | 0.131 |
- | - | YEAR + AGE | 0.16 | 9 | 1197.90 | 3.00 | 0.064 |
Age was included in all models as a covariate (see Methods). Wintering model support for male arrival date was counter to prediction (see Discussion).