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Table 1 Male color metrics and their relationship with female association time

From: Mate choice for a male carotenoid-based ornament is linked to female dietary carotenoid intake and accumulation

 

Male color

    

Measure

red

red/orange

orange/yellow

yellow

β

t

p

r 2

r

0.12 ± 0.01

0.12 ± 0.007

0.10 ± 0.006

0.11 ± 0.006

3.81

1.54

0.12

0.191

φ

1.28 ± 0.08

-1.39 ± 0.06

-0.616 ± 0.73

-1.01 ± 0.15

0.099

2.60

0.0098

0.216

θ

-0.48 ± 0.02

0.02 ± 0.06

0.15 ± 0.04

0.49 ± 0.10

-0.59

-4.60

< 0.0001

0.236

chromatic contrast (jnds)

-

11.0 ± 1.5

11.49 ± 0.9

15.6 ± 1.4

-0.032

-4.20

< 0.0001

0.233

achromatic contrast (jnds)

-

3.1 ± 0.7

3.6 ± 0.73

6.5 ± 1.1

-0.055

-3.21

0.0015

0.233

Hue (nm)

575.9 ± 6.7

553.2 ± 1.8

548.8 ± 1.0

524.3 ± 6.4

0.011

4.50

< 0.0001

0.244

  1. Mean ± SE values for color measures acquired from stimulus male and the results of a linear regressions of female association time with each measure of experimental male plumage color. Chromatic and achromatic contrast values were calculated in comparison to the reddest male in each mate choice trial.