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Figure 7


Fig. 7. Modelling luminance and chromatic contrast of crab colours for crab and bird visual systems. (A) The spectral sensitivities used for modelling (for references see Materials and methods). (B) The chromatic distance of carapace colours to the mudflat background in the three focal colonies North, Central and South (see Fig. 6), as box and whisker plots showing the median, the 75% quartiles, the maximum and the minimum values. (C) The chromatic distance to the white point (top) and luminance signals (centre and bottom) of carapace colours and mud for crab and bird photoreceptors. For details, see Materials and methods.





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