Frontiers in Zoology

Table 1 Median differences in luminance and hue between all background combinations

From: Scorpionfish rapidly change colour in response to their background

	Scorpaena maderensis			Scorpaena porcus
Background	Median	Lower CIs	Upper CIs	Median	Lower CIs	Upper CIs
(A) Luminance. R²_marg = 0.387, R²_cond = 0.937
Observer = T. delaisi
Medium/orange–dark/grey	0.024	0.020	0.030	0.017	0.013	0.021
Medium/orange–light/grey	− 0.030	− 0.036	− 0.024	− 0.026	− 0.032	− 0.021
Light/grey–dark/grey	0.054	0.047	0.062	0.042	0.036	0.049
Observer = P. flavescens
Medium/orange–dark/grey	0.030	0.025	0.036	0.022	0.018	0.027
Medium/orange–light/grey	− 0.030	− 0.037	− 0.025	− 0.028	− 0.034	-0.023
Light/grey–dark/grey	0.061	0.054	0.069	0.051	0.044	0.059
(B) Hue. R²_marg = 0.597, R²_cond = 0.881
Observer = T. delaisi
Medium/orange–dark/grey	0.019	0.015	0.023	0.021	0.017	0.026
Medium/orange–light/grey	0.011	0.008	0.015	0.007	0.003	0.012
Light/grey–dark/grey	0.007	0.003	0.011	0.014	0.009	0.018
Observer = P. flavescens
Medium/orange–dark/grey	0.035	0.031	0.039	0.042	0.037	0.046
Medium/orange–light/grey	0.022	0.018	0.025	0.017	0.012	0.021
Light/grey–dark/grey	0.014	0.010	0.017	0.025	0.020	0.029

Median differences of A) luminance and B) hue between all combinations of background, species and observer. Estimated effect sizes are reported as the median difference and its 95% compatibility intervals (CIs), calculated from 10,000 simulations of the posterior distribution of model parameters. N = 24 for S. maderensis and N = 18 for S. porcus. Effect size strength increases with increasing deviation of median differences from zero, and the robustness of the result increases with decreasing degree of overlap of the 95% compatibility intervals (CIs) with zero

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ISSN: 1742-9994

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