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Fig. 2 | Frontiers in Zoology

Fig. 2

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. 2

a Each colour morph of G. maculosus was photographed on its natural substrate on tree trunks in forested sites (b) or on boulder outcrops in blanket bog (c) alongside a colour standard card. Reflectance in R, G and B colour channels was calculated from a 1 cm × 1 cm square drawn over the mantle to estimate slug colouration, and a further three squares measuring 3 cm × 3 cm were drawn over patches of the substrate to calculate background R, G and B reflectance. Scale bars were measured from original photographs

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