Fig 1.
Electroretinogram responses of Euxesta eluta.
A. Typical waveform, B. Intensity-response function (V/log I) at selected waveforms for a representative male E. eluta. The selected criterion response (2 mV) is designated by the dotted horizontal line.
Fig 2.
Spectral sensitivity curves for female and male: A. Euxesta eluta, and B. Chaetopsis massyla.
Fig 3.
Absorbance curves of individual pigments modelled using visual pigment templates and averaged spectral sensitivity values for E. eluta.
Fig 4.
Matching of the average spectral sensitivity curves for Euxesta eluta (A) and Chaetopsis massyla to mixtures of photopigments (nomograms).
The spectral sensitivity curve for E. eluta was fit with a mixture consisting of 355:430:500:560 nm in a ratio of 25:21:25:29. The curve for C. massyla was fit to a mixture consisting of 350:430:500:560 nm in a ratio of 28:18:27:27.
Fig 5.
Reflectance from cards painted with 100% blue, green and yellow paints.
For comparison, reflectance from 100% black, 100% white and 10% gray are also presented.
Fig 6.
Attraction of Euxesta eluta (A) and Chaetopsis massyla (B) in paired comparisons with a yellow card and a gray card matching in brightness.
The different levels of brightness of yellow are represented by a range of yellow pigment (10-100%) combined with white pigment. Gray cards produced by combination of black and white pigment matched each yellow mixture in brightness. Asterisks (*) above paired columns denote statistically significant differences at P < 0.05, double asterisks (**) denote significant differences at P < 0.001 and no asterisks represent no significant differences. N = 16.
Fig 7.
Attraction of Euxesta eluta (A) and Chaetopsis massyla (B) in paired comparisons with a green card and a gray card matching in brightness.
The different levels of brightness of green are represented by a range of green pigment (10-100%) combined with white pigment. Gray cards produced by combination of black and white pigment matched each green mixture in brightness. Asterisks (*) above paired columns denote statistically significant differences at P < 0.05, double asterisks (**) denote significant differences at P < 0.001 and no asterisks represent no significant differences. N = 16.
Fig 8.
Attraction of Euxesta eluta (A) and Chaetopsis massyla (B) in paired comparisons with a blue card and a gray card matching in brightness.
The different levels of brightness of blue are represented by a range of blue pigment (10–100%) combined with white pigment. Gray cards produced by combination of black and white pigment matched each blue mixture in brightness. Asterisks (*) above paired columns denote statistically significant differences at P < 0.05, double asterisks (**) denote significant differences at P < 0.001 and no asterisks represent no significant differences. N = 16.