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New variants of the haemoglobins of turbot (Scophthalmus maximus): possible use in population genetics studies and aquaculture

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Blood samples from turbot, Scophthalmus maximus, were analysed using agar gel electrophoresis and isoelectric focusing (IEF) to reveal individual and population variation in haemoglobin genotypes. In total, 394 individuals were sampled and analysed from five localities (Iceland, west Norway, southwest Norway, Kattegat and the Baltic Sea). A new haemoglobin polymorphism of turbot was documented using IEF electrophoresis (pH 5.5-8.5), and, in addition to the three genotypes seen in earlier studies, six subgroups are described. Significantly different genotype distributions were found between the samples from Iceland and west Norway on one hand and southwest Norway, Kattegat and Baltic on the other hand. Also, the frequencies of the Hb-I subgroups varied among the sampling sites. For instance, the subgroup Hb-I(1/1)e was absent in the samples from southwest Norway and Kattegat, whereas the subgroup Hb-I(1/1)d was almost absent in samples from Iceland and west Norway but common in the samples from southwest Norway and Kattegat. The results indicate that the turbot in northern European waters belong to more than one panmictic population.
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Keywords: Northeast Atlantic; aquaculture; haemoglobin; population genetics; turbot

Document Type: Research Article

Publication date: 2003-01-01

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