Table 1 Chromatic and achromatic variability of ornamental vs. non-ornamental colours in male M. coronatus.

From: Variability, heritability and condition-dependence of the multidimensional male colour phenotype in a passerine bird

 

Chromatic variability

Achromatic variability

Fixed effects

β

SE

t

β

SE

t

Intercept

−0.70

0.04

−19.74***

−0.78

0.05

−14.19***

Typea

0.85

0.05

17.56***

0.64

0.07

9.35***

Random effects (σ²)

      

Bird ID

0.01

  

0.02

  

Residual

0.67

  

1.59

  

Marginal / conditional R2

0.21 / 0.22

0.06 / 0.07

  1. Shown are results from linear mixed models examining the effects of the type of colour (reference: anon-ornamental) on chromatic variability (calculated as the log-transformed distance to the colour centroid in the bird visual space; black excluded; n = 1147) and achromatic variability (calculated as the log-transformed distance to the colour average brightness; n = 1396). Level of significance: ***P < 0.001 (in bold).
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