Table 1

Male color metrics and their relationship with female association time

Male color


Measure

red

red/orange

orange/yellow

yellow

β

t

p

r2


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


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.

Toomey and McGraw BMC Evolutionary Biology 2012 12:3   doi:10.1186/1471-2148-12-3

Open Data