Nanostructural predictors of plumage colour variables in adult male satin bowerbirds from multiple regression models
| Colour variable . | Predictors . | R2 . | β . | d.f. . | P . |
|---|---|---|---|---|---|
| Hue | Cortex thickness | 0.41 | 0.64 | 1,8 | 0.04 |
| UV chroma | Whole model | 0.65 | 2,7 | 0.03 | |
| Percentage of melanin in inner layer | 0.36 | 1.0 | 1,8 | 0.009 | |
| Percentage of melanin in outer layer | 0.29 | 0.69 | 1,8 | 0.05 | |
| Brightness | No significant predictors |
| Colour variable . | Predictors . | R2 . | β . | d.f. . | P . |
|---|---|---|---|---|---|
| Hue | Cortex thickness | 0.41 | 0.64 | 1,8 | 0.04 |
| UV chroma | Whole model | 0.65 | 2,7 | 0.03 | |
| Percentage of melanin in inner layer | 0.36 | 1.0 | 1,8 | 0.009 | |
| Percentage of melanin in outer layer | 0.29 | 0.69 | 1,8 | 0.05 | |
| Brightness | No significant predictors |
R2, coefficient of multiple determination; β,standardized partial regression coefficient; d.f., degrees of freedom; P, probability values. Only significant (P≤0.05)predictors are shown.