Fig. 3. Plasma concentrations of adrenocorticotropic hormone (ACTH) (A), -melanocyte-stimulating hormone (-MSH) (B) and cortisol (C) in socially dominant (N=7 for both black and white background) and subordinate (N=7 for both black and white background) Arctic charr after 5 days of social interaction in pairs on white or black background colour. Controls are fish that were visually isolated on a white (N=8) or black (N=8) background. Values are means + S.E.M. There were no significant differences between individual means (P<0.05; MANOVA followed by the Sheffé post hoc test on the combined effect of social position and background colour). For MANOVA statistics see Table 1.

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