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Keywords:

  • cortisol;
  • larviculture;
  • melanophore-stimulating hormone;
  • Solea senegalensis

In this study it was shown that dark coloured post-larvae of Senegalese sole Solea senegalensis, at two different ages, had elevated cortisol concentrations compared with lighter coloured individuals. As melanophore-stimulating hormone levels were not elevated in dark coloured fish, it is possible that this hormone may not be the main melanotropic hormone involved in stress-related skin darkening.