We studied 14 enzyme systems of Atlantic salmon (Salmo salar), brown trout (S. trutta), and their F1 hybrids. Five enzymes, namely glucosephosphate isomerase, malic enzyme, phosphoglucomutase, superoxide dismutase, and xanthine dehydrogenase, were diagnostic in providing reliable separation of the species and their hybrids. The most anodal locus of glucosephosphate isomerase exhibited adequate activity also in adipose fin biopsies, thus allowing the identification of live fish.
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Vuorinen et al. (1984) studied this question.
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