Abstract

Individual concentrations of dopamine, norepinephrine, epinephrine, free triiodothyronine, total protein, albumin, as well as alanine aminotransferase activity were measured in embryos and larvae of the Atlantic salmon Salmo salar. Two groups of embryos and larvae differed by biochemical parameters were revealed. The relationship between biochemical differentiation and migratory polymorphism in the Atlantic salmon during the period of primary juvenile dispersal is discussed.

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