| Summary: | The aim of the present study was to investigate genotype dependent growth rate in young cod. The material of 0-group cod was collected from pond produced cod in western and northern Norway, and analysed for genotype distribution of haemoglobins and several tissue enzymes. The mean growth rate (measured as size at sampling) of the different genotypes were compared by analyses of variance. Associations between growth rate and haemoglobin type were found in one sample, and likewise LDH genotype dependent growth rate was indicated in one sample. The results are discussed in relation to the biological significance of biochemical genetic variation.
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