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Effect of three conditioning diets on the fatty acid composition of gonads and muscle of Argopecten purpuratus
Palma-Fleming, H.; Navarro, J.M.; Peña, E. (2002). Effect of three conditioning diets on the fatty acid composition of gonads and muscle of Argopecten purpuratus. N.Z. J. Mar. Freshwat. Res. 36: 605-620
In: New Zealand Journal of Marine and Freshwater Research. Royal Society of New Zealand: Wellington. ISSN 0028-8330, more
Peer reviewed article  

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Keyword
    Marine

Authors  Top 
  • Palma-Fleming, H.
  • Navarro, J.M.
  • Peña, E.

Abstract
    Mature specimens of Argopecten purpuratus (Lamarck, 1819), obtained from the Culture Center of Tongoy Bay, northern Chile were conditioned at 20°C and fed three different diets (mixture of pure microalgae, microalgae supplemented with a lipid emulsion, and microalgae supplemented with carbohydrates). Fatty acids were analysed at 0, 18, 38, 58, and 72 days of gonad conditioning. Both muscle and gonads showed a significant decrease in the relative distribution (weight % of total fatty acids) of saturated, monounsaturated, and n-6 polyunsaturated fatty acids (mg/g dry weight). Generally, an increase of the n-3 polyunsaturated group was observed for gonads until Day 58, thereafter a decrease was observed, probably as a result of environmental stress. A similar trend was observed for eicosapentaenoic and docosahexaenoic acids. n-3 polyunsaturated fatty acids were the most preserved fatty acids, suggesting their importance as essential fatty acids for gonad maturation. The lipid-supplemented diet afforded the best gonadal maturation and spawning occurred after 72 days.

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