Fig. 6From: Quantifying phenotype-environment matching in the protected Kerry spotted slug (Mollusca: Gastropoda) using digital photography: exposure to UV radiation determines cryptic colour morphs a UV-exposed slugs contained a significantly greater estimated volume of black pigment than darkness-reared slugs. Volume fraction estimates are expressed as percentages. TS of integument from b a darkness-reared (brown) juvenile and c a UV-exposed (black) juvenile (mag. Ă—200). Black pigment is concentrated in the outer epithelia of both slug colour morphsBack to article page