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Retention efficiency of EPA and DHA in Atlantic salmon fed dietary EPA + DHA levels from 1·4 to 5·2 % of total fatty acids (FA) for 202 and 142 d at 6 and 12°C, respectively (a) and 1·3 to 7·4 % of total FA for 151 d at 12°C (b). Values are means per tank, with standard errors represented by vertical bars.
