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Altered fatty acid compositions in atlantic salmon (Salmo salar) fed diets containing linseed and rapeseed oils can be partially restored by a subsequent fish oil finishing diet.
J Nutr. 2003 Sep; 133(9):2793-801.JN

Abstract

Atlantic salmon postsmolts were fed a control diet or one of 9 experimental diets containing various blends of two vegetable oils, linseed (LO) and rapeseed oil (RO), and fish oil (FO) in a triangular trial design, for 50 wk. After sampling, fish previously fed 100% FO, LO and RO were switched to a diet containing 100% FO for a further 20 wk. Fatty acid compositions of flesh total lipid were linearly correlated with dietary fatty acid compositions (r = 0.99-1.00, P < 0.0001). Inclusion of vegetable oil at 33% of total oil significantly reduced the concentrations of the highly unsaturated fatty acids, eicosapentaenoate [20:5(n-3)] and docosahexaenoate [22:6(n-3)], to approximately 70 and 75%, respectively, of the values in fish fed 100% FO. When vegetable oil was included at 100% of total dietary lipid, the concentrations of 20:5(n-3) and 22:6(n-3) were significantly reduced to approximately 30 and 36%, respectively, of the values in fish fed FO. Transfer of fish previously fed 100% vegetable oil to a 100% FO diet for 20 wk restored the concentrations of 20:5(n-3) and 22:6(n-3) to approximately 80% of the value in fish fed 100% FO for 70 wk, although the values were still significantly lower. However, in fish previously fed either 100% LO or RO, concentrations of 18:2(n-6) remained approximately 50% higher than in fish fed 100% FO. This study suggests that RO and LO can be used successfully to culture salmon through the seawater phase of their growth cycle; this will result in reductions in flesh 20:5(n-3) and 22:6(n-3) concentrations that can be partially restored by feeding a diet containing only marine FO for a period before harvest.

Authors+Show Affiliations

Institute of Aquaculture, University of Stirling, Stirling, FK9 4LA, Scotland, UK. gjb1@stir.ac.ukNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

12949367

Citation

Bell, J Gordon, et al. "Altered Fatty Acid Compositions in Atlantic Salmon (Salmo Salar) Fed Diets Containing Linseed and Rapeseed Oils Can Be Partially Restored By a Subsequent Fish Oil Finishing Diet." The Journal of Nutrition, vol. 133, no. 9, 2003, pp. 2793-801.
Bell JG, Tocher DR, Henderson RJ, et al. Altered fatty acid compositions in atlantic salmon (Salmo salar) fed diets containing linseed and rapeseed oils can be partially restored by a subsequent fish oil finishing diet. J Nutr. 2003;133(9):2793-801.
Bell, J. G., Tocher, D. R., Henderson, R. J., Dick, J. R., & Crampton, V. O. (2003). Altered fatty acid compositions in atlantic salmon (Salmo salar) fed diets containing linseed and rapeseed oils can be partially restored by a subsequent fish oil finishing diet. The Journal of Nutrition, 133(9), 2793-801.
Bell JG, et al. Altered Fatty Acid Compositions in Atlantic Salmon (Salmo Salar) Fed Diets Containing Linseed and Rapeseed Oils Can Be Partially Restored By a Subsequent Fish Oil Finishing Diet. J Nutr. 2003;133(9):2793-801. PubMed PMID: 12949367.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Altered fatty acid compositions in atlantic salmon (Salmo salar) fed diets containing linseed and rapeseed oils can be partially restored by a subsequent fish oil finishing diet. AU - Bell,J Gordon, AU - Tocher,Douglas R, AU - Henderson,R James, AU - Dick,James R, AU - Crampton,Vivian O, PY - 2003/9/2/pubmed PY - 2003/10/29/medline PY - 2003/9/2/entrez SP - 2793 EP - 801 JF - The Journal of nutrition JO - J. Nutr. VL - 133 IS - 9 N2 - Atlantic salmon postsmolts were fed a control diet or one of 9 experimental diets containing various blends of two vegetable oils, linseed (LO) and rapeseed oil (RO), and fish oil (FO) in a triangular trial design, for 50 wk. After sampling, fish previously fed 100% FO, LO and RO were switched to a diet containing 100% FO for a further 20 wk. Fatty acid compositions of flesh total lipid were linearly correlated with dietary fatty acid compositions (r = 0.99-1.00, P < 0.0001). Inclusion of vegetable oil at 33% of total oil significantly reduced the concentrations of the highly unsaturated fatty acids, eicosapentaenoate [20:5(n-3)] and docosahexaenoate [22:6(n-3)], to approximately 70 and 75%, respectively, of the values in fish fed 100% FO. When vegetable oil was included at 100% of total dietary lipid, the concentrations of 20:5(n-3) and 22:6(n-3) were significantly reduced to approximately 30 and 36%, respectively, of the values in fish fed FO. Transfer of fish previously fed 100% vegetable oil to a 100% FO diet for 20 wk restored the concentrations of 20:5(n-3) and 22:6(n-3) to approximately 80% of the value in fish fed 100% FO for 70 wk, although the values were still significantly lower. However, in fish previously fed either 100% LO or RO, concentrations of 18:2(n-6) remained approximately 50% higher than in fish fed 100% FO. This study suggests that RO and LO can be used successfully to culture salmon through the seawater phase of their growth cycle; this will result in reductions in flesh 20:5(n-3) and 22:6(n-3) concentrations that can be partially restored by feeding a diet containing only marine FO for a period before harvest. SN - 0022-3166 UR - https://www.unboundmedicine.com/medline/citation/12949367/Altered_fatty_acid_compositions_in_atlantic_salmon__Salmo_salar__fed_diets_containing_linseed_and_rapeseed_oils_can_be_partially_restored_by_a_subsequent_fish_oil_finishing_diet_ L2 - https://academic.oup.com/jn/article-lookup/doi/10.1093/jn/133.9.2793 DB - PRIME DP - Unbound Medicine ER -