Predictor | Estimate (SE) | t (P) |
---|
Intercept | −1.257 (0.498) | −2.523 (0.013) |
Male nest building | −0.339 (0.097) | −3.504 (0.001) |
Sexual dichromatisma | 0.030 (0.010) | 2.854 (0.005) |
Migration distance | 0.217 (0.118) | 1.835 (0.068) |
(Migration distance)2 | −0.029 (0.015) | −1.896 (0.059) |
Social bondb | −0.353 (0.165) | −2.135 (0.034) |
- Whole model: F5,167 = 7.703, N = 173, P < 0.001, adjusted R2 = 0.163, λ = 0.475
- aData from Dale et al. [64]. b Data from Tobias et al. [65]. The best model was chosen among all models ran from a reduced data set of 154 species with no missing values for any variable in a backwards stepwise deletion approach until only significant (P < 0.05) predictors remained. The model with fewest predictor variables was chosen from the set of best performing models (separated from the rest by delta AIC < 2; Additional file 6). The model shown here is based on a maximized data set (no missing values among the included predictor variables). The λ-value was significantly different from λ = 0 (P < 0.001) and λ = 1 (P < 0.001). Significant variables in bold (P < 0.05)