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. 2017 Jan 11;12(1):e0169810. doi: 10.1371/journal.pone.0169810

Fig 4. Effect of using either the UVS or VS average eye-type on calculated sexual dichromatism scores.

Fig 4

Comparison of A) the mean sexual dichromatism scores (in JNDs), and B) ranks of 70 galliform species contrasting the two most commonly used bird visual systems. Values on the x-axis were generated using the parameters associated with the ‘average UVS eye-type’ visual system; values on the y-axis were generated with the ‘average VS eye-type’ visual system (see Methods). The solid triangle symbol in A) identifies the species that experienced the greatest change in mean dichromatism score, and the greatest change in rank in B). The sexual dichromatism score of each patch of the species highlighted in A), under the two sets of parameters, are presented in C). The sexual dichromatism score of each patch of the species highlighted in B), under the two sets of parameters, are presented in D). In C) and D), the solid triangle symbol identifies the patch that experienced the greatest change in dichromatism score. Dashed lines represent 1:1 reference line.