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The Chilean scallop Argopecten purpuratus (Lamarck, 1819): 2. Manipulation of the fatty acid composition and lipid content of the eggs via lipid supplementation of the broodstock diet
Caers, M.; Coutteau, P.; Curé, K.; Morales, V.; Gajardo, G.; Sorgeloos, P. (1999). The Chilean scallop Argopecten purpuratus (Lamarck, 1819): 2. Manipulation of the fatty acid composition and lipid content of the eggs via lipid supplementation of the broodstock diet, in: VLIZ Coll. Rep. 29(1999). VLIZ Collected Reprints: Marine and Coastal Research in Flanders, 29: pp. chapter 9
In: (1999). VLIZ Coll. Rep. 29(1999). VLIZ Collected Reprints: Marine and Coastal Research in Flanders, 29. Flanders Marine Institute (VLIZ): Oostende, more
In: VLIZ Collected Reprints: Marine and Coastal Research in Flanders. Vlaams Instituut voor de Zee: Oostende. ISSN 1376-3822, more

Also published as
  • Caers, M.; Coutteau, P.; Curé, K.; Morales, V.; Gajardo, G.; Sorgeloos, P. (1999). The Chilean scallop Argopecten purpuratus (Lamarck, 1819): 2. Manipulation of the fatty acid composition and lipid content of the eggs via lipid supplementation of the broodstock diet. Comp. Biochem. Physiol. (B Biochem. Mol. Biol.) 123(1): 97-103, more

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Keywords
    Diets; Eggs; Fatty acids; Lipids; Shellfish culture; Marine

Authors  Top 
  • Morales, V.
  • Gajardo, G.
  • Sorgeloos, P., more

Abstract
    Dietary supplementation with lipid emulsions during broodstock conditioning of Argopecten purpuratus was used to manipulate the fatty acid composition of the eggs. The scallops were fed a mixed algal diet either alone (Al) or supplemented with an emulsion rich in ethyl esters of docosahexaenoic acid (DHA; Al+EmDHA) or eicosapentaenoic acid (EPA; Al+EmEPA) at a concentration of 50% lipids per algal dry weight (DW). The longer induction period and the lower fecundity in scallops fed solely on algae indicated a higher food value for the lipid-supplemented diet compared to the non-supplemented diet. Lipid supplementation resulted in a significant increase of the total lipid content (mg/g DW) of the eggs. The fatty acid quality of the diet had no significant effect on the fatty acid profile of the polar lipids. However, the supplementation of the DHA-rich emulsion resulted in a significant increase of the DHA level (% of total fatty acids) in the total and neutral lipids of the eggs compared to eggs from scallops fed solely algae. The absolute DHA content (mg/g DW) increased by 47%. The EPA level in the total and neutral lipids of eggs from broodstock supplemented with EmEPA was significantly higher than in eggs from scallops fed Al+EmDHA but no significant differences were detected with eggs from the non-supplemented diet (Al). The absolute EPA concentration in eggs from scallops fed Al+EmEPA was, respectively, 19 and 17% higher than in eggs from broodstock fed, respectively, solely algae (Al) or Al+EmDHA. The results illustrated that fatty acids, supplied as emulsified ethyl esters, could be ingested and assimilated by adult A. purpuratus and were at least partially allocated to the eggs.

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