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Fig. 2. The role of skin chromatophores on abdominal skin coloration and
transparency. (A) An example of photographs of abdominal skin biopsies from
G. flavescens before (left) and after (right) 60 min exposure to
noradrenaline. These photographs were taken on a light table with all light
coming through the biopsies. In the upper half, the boxes in the photographs
describe the area selected for colour quantification. In the lower half,
magnified sections of abdominal tissue show the presence of chromatophores,
with either dispersed (left) or aggregated (right) pigment. (B) Effects of
chromatophore pigment aggregation caused by noradrenaline exposure on the
transparency and coloration of abdominal skin biopsies from G.
flavescens females. The transparency and coloration (CIE a* and b*) were
quantified before (filled circles) and after exposure to noradrenaline (open
circles). Means ± S.E.M.,
N=10.
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