Fig. 5: Eye size and visual capacities of female guppies artificially selected for higher polarization.
a Boxplots of eye morphological measurements. b Boxplots and density plots of the proportion of time following 6 different rotating stimuli with rotating and static gratings of different widths at the lower end of guppy visual acuity (thinner widths represent a higher degree of difficulty to be perceived). c Boxplots and density plots of the deviation of fish swimming speed in relation to the speed that a rotating stimulus presented. in polarization-selected. For all morphological measurements and vision assays we measured the same polarization-selected (neyesize = 57, noptomotor = 59, nresolution = 59, pink) and control females (neyesize = 55, noptomotor = 57, nresolution = 55, blue). In all boxplots, horizontal lines indicate medians, boxes indicate the interquartile range, and whiskers indicate all points within 1.5 times the interquartile range. Optomotor response average values not sharing any letter are significantly different (p < 0.05) in post-hoc contrasts (see Supplementary Table 9b). No significant differences were observed for any comparison between control and polarization-selected fish (see Supplementary Tables 8–10). Source data are provided as a Source Data file.
