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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.