Arachidonic acid, arachidonic/eicosapentaenoic acid ratio, stearidonic acid and eicosanoids are involved in dietary-induced albinism in Senegal sole Solea senegalensis

Villalta, M.; Estevez, A.; Bransden, M.P.; Bell, J.G.

Aquaculture Nutrition 14(2): 120-128


ISSN/ISBN: 1353-5773
DOI: 10.1111/j.1365-2095.2007.00511.x
Accession: 030164273

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Senegal sole larvae were fed live prey enriched with different amounts of arachidonic acid (ARA, 20:4n-6) and eicosapentaenoic acid (EPA, 20:5n-3) to re-evaluate the effect of these two fatty acids on flatfish pigmentation. Echium oil, a plant-derived oil rich in gamma-linolenic acid (18:3n-6) and stearidonic acid (18:4n-3) was also used as a component of one of the enrichment emulsions. Although ARA content did not have any effect on growth there was a clear influence on pigmentation that correlated clearly with prostaglandin production. Inclusion of Echium oil, on the contrary, exerted a positive effect on pigmentation rate even though dietary ARA levels were as high as in the other emulsions. The relationships between dietary ARA levels and dietary ARA/EPA ratio, prostaglandin production and pigmentation are discussed.