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Fig. 4 | Frontiers in Zoology

Fig. 4

From: Quantifying phenotype-environment matching in the protected Kerry spotted slug (Mollusca: Gastropoda) using digital photography: exposure to UV radiation determines cryptic colour morphs

Fig. 4

Juvenile slugs irradiated under UV-lighting (a) showed less reflectance in R (top line), G (middle line) and B (bottom line) colour channels with each month, becoming significantly darker than juveniles maintained in darkness (b). Colour reflectance scores differed significantly between UV-exposed and darkness reared slugs at the end of the experimental period (R: t = −14.461, p < 0.001; G: t = −11.391, p = <0.001; B: t = −7.700, p = <0.001). Numbers above means show group n at each sampling month; error bars show ±SE for means

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