Abstract
Abstract Samples of blue mouth, Helicolenus dactylopterus (De La Roche, 1809). were collected in the areas between Shetland and the Faroe Islands, and analysed by starch gel electrophoresis and isoelectric focusing of haemoglobins and tissue enzymes. Moderate intraspecific variation was found, but most enzyme patterns were diagnostic for this species compared to the Sebastes species. The haemoglobin patterns were similar to the pattern of Sebastes marinus and S. viviparus, and thus diagnostic in relation to S. mentella. The estimated genetic distances between blue mouth and the Sebastes species were high (0.92–1.05) compared to corresponding values within the latter genus (0.03–0.13).
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