Arachidonic acid, arachidonic/eicosapentaenoic acid ratio, stearidonic acid and eicosanoids are involved in dietary-induced albinism in Senegal sole (Solea senegalensis) |
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| Authors: | M VILLALTA A ESTÉVEZ MP BRANSDEN & JG BELL |
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| Institution: | Centre d'Aqüicultura-IRTA Ctra, Sant Carles de la Ràpita, Tarragona, Spain;; Programa de Doctorat en Aqüicultura, Universitat Autònoma de Barcelona, Barcelona, Spain;; Marine Research Laboratories, Tasmania Aquaculture and Fisheries Institute and Aquafin Cooperative Research Centre (CRC), University of Tasmania, Hobart, Tasmania, Australia;; Skretting, Cambridge, Tas., Australia;; Institute of Aquaculture, University of Stirling, Stirling, UK |
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| Abstract: | 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. |
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| Keywords: | arachidonic acid arachidonic acid/eicosapentaenoic acid ratio Artemia enrichment pigmentation prostaglandins Solea senegalensis |
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