Fig. 2
From: Scorpionfish rapidly change colour in response to their background
Scorpionfish luminance and hue change across backgrounds. Scorpionfish luminance (average of the medium (mw) and long wavelength (lw) cone catches) from A Tripterygion delaisi and B Pomatoschistus flavescens visual perspective. Scorpionfish hue (ratio of short compared to medium and long wavelength cone catches, where higher values indicate a shift towards longer wavelengths, see Methods) from C T. delaisi and D P. flavescens visual perspective. S. m. = Scorpaena maderensis, S. p. = S. porcus. All panels show model estimates and raw data for all combinations of background, species and observer. Each point represents a measurement for each individual fish (N = 24 S. maderensis, N = 18 S. porcus) averaged over the two time points (after one and five minutes adaptation time to the backgrounds, see Methods). Markers with vertical bars represent predicted mean and 95% compatibility intervals (CIs) derived from 10,000 simulations of the posterior distribution of model parameters. The strength of the difference between two groups increases with decreasing degree of overlap of their 95% CIs