Table 1.
Nominal logistic regression models for the effect of feather hormone, year, sex and tarsus length (proxy for size) on the survival of house sparrows. The whole-model statistic is provided in the first line of each model. The degree of freedom for each test and sample size for each feather hormone are in parentheses. The lowest AICc (italics) indicates the best model for each feather hormone. Significant effects are indicated in bold.
| effect | LR χ2 | p | AICc |
|---|---|---|---|
| corticosterone (49) | |||
| model 1 | 2.9 (1) | 0.087 | 65.8 |
| corticosterone | 2.9 (1) | 0.087 | |
| model 2 | 12.9 (2) | 0.002 | 58.1 |
| corticosterone | 7.6 (1) | 0.006 | |
| year | 9.9 (1) | 0.002 | |
| model 3 | 15.1 (4) | 0.005 | 60.7 |
| corticosterone | 6.9 (1) | 0.009 | |
| year | 10.3 (1) | 0.001 | |
| tarsus | 1.2 (1) | 0.256 | |
| sex | 1.4 (1) | 0.242 | |
| cortisol (49) | |||
| model 1 | 7.3 (1) | 0.007 | 61.4 |
| cortisol | 7.3 (1) | 0.007 | |
| model 2 | 11.0 (2) | 0.004 | 60.0 |
| cortisol | 5.7 (1) | 0.017 | |
| year | 3.6 (1) | 0.057 | |
| model 3 | 13.5 (4) | 0.009 | 62.3 |
| cortisol | 5.4 (1) | 0.020 | |
| year | 4.0 (1) | 0.046 | |
| tarsus | 0.9 (1) | 0.342 | |
| sex | 1.9 (1) | 0.168 | |
| testosterone (35) | |||
| model 1 | 5.7 (1) | 0.017 | 44.9 |
| testosterone | 5.7 (1) | 0.017 | |
| model 2 | 9.1 (2) | 0.011 | 43.9 |
| testosterone | 4.6 (1) | 0.032 | |
| year | 3.4 (1) | 0.065 | |
| model 3 | 22.7 (3) | < 0.0001 | 32.8 |
| testosterone | 17.3 (1) | < 0.0001 | |
| tarsus | 7.8 (1) | 0.005 | |
| tarsus × testosterone | 11.7 (1) | 0.001 | |
| model 4 | 26.5 (4) | < 0.0001 | 31.7 |
| testosterone | 19.1 (1) | < 0.0001 | |
| tarsus | 10.3 (1) | 0.001 | |
| tarsus × testosterone | 13.4 (1) | 0.0003 | |
| sex | 3.8 (1) | 0.051 | |
| model 5 | 30.0 (4) | < 0.0001 | 28.2 |
| testosterone | 19.8 (1) | < 0.0001 | |
| tarsus | 9.8 (1) | 0.002 | |
| tarsus × testosterone | 16.0 (1) | < 0.0001 | |
| year | 7.3 (1) | 0.007 |