From: Evolution of female promiscuity in Passerides songbirds
Predictor variable | N | Estimate (SE) | t (P) | R 2 | λ |
---|---|---|---|---|---|
Male parental care | |||||
 Nest building | 173 | − 0.399 (0.099) | − 4.030 (< 0.001) | 0.081 | 0.594 |
 Incubation | 181 | −0.308 (0.122) | −2.525 (0.012) | 0.029 | 0.497 |
 Chick feeding | 174 | −0.239 (0.157) | −1.524 (0.129) | 0.013 | 0.617 |
Plumage colouration | |||||
 Sexual dichromatisma | 200 | 0.030 (0.010) | 2.835 (0.005) | 0.039 | 0.751 |
 Male coloura | 200 | 0.014 (0.011) | 1.296 (0.197) | 0.008 | 0.784 |
 Female coloura | 200 | −0.036 (0.015) | −2.359 (0.019) | 0.027 | 0.694 |
Migratory behaviour | |||||
 Categoriesa | 177 | 0.235 (0.079) | 2.988 (0.003) | 0.049 | 0.604 |
 Distance | 202 | 0.326 (0.109) | 3.006 (0.003) |  |  |
 (Distance)2 | 202 | −0.040 (0.015) | −2.729 (0.007) | 0.044 | 0.711 |
 Body sizea | 177 | −0.037 (0.155) | −0.237 (0.813) | 0.000 | 0.694 |
 Tropical life historya | 177 | −0.176 (0.092) | −1.916 (0.057) | 0.021 | 0.649 |
 Latitude | 202 | 0.001 (0.005) | 0.264 (0.792) | 0.000 | 0.761 |
 Tropical/temperate | 202 | 0.267 (0.216) | 1.235 (0.218) | 0.008 | 0.734 |
 Social bondb | 202 | −0.368 (0.151) | −2.441 (0.016) | 0.029 | 0.723 |
 Sexual selectiona | 177 | 0.236 (0.098) | 2.408 (0.019) | 0.017 | 0.655 |
 Cooperative breedinga | 177 | −0.016 (0.074) | −0.211 (0.833) | 0.000 | 0.691 |