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Dietary lipid source modulates in vivo fatty acid metabolism in the freshwater fish, Murray cod (Maccullochella peelii peelii).
- Source :
-
Journal of agricultural and food chemistry [J Agric Food Chem] 2007 Feb 21; Vol. 55 (4), pp. 1582-91. Date of Electronic Publication: 2007 Jan 23. - Publication Year :
- 2007
-
Abstract
- The aim of the present investigation was to quantify the fate of C18 and long chain polyunsaturated dietary fatty acids in the freshwater fish, Murray cod, using the in vivo, whole-body fatty acid balance method. Juvenile Murray cod were fed one of five iso-nitrogenous, iso-energetic, semipurified experimental diets in which the dietary fish oil (FO) was replaced (0, 25, 50, 75, and 100%) with a blended vegetable oil (VO), specifically formulated to match the major fatty acid classes [saturated fatty acids, monounsaturated fatty acids, n-3 polyunsaturated fatty acids (PUFA), and n-6 PUFA] of cod liver oil (FO). However, the PUFA fraction of the VO was dominated by C18 fatty acids, while C20/22 fatty acids were prevalent in the FO PUFA fraction. Generally, there was a clear reflection of the dietary fatty acid composition across each of the five treatments in the carcass, fillet, and liver. Lipid metabolism was affected by the modification of the dietary lipid source. The desaturation and elongation of C18 PUFAs increased with vegetable oil substitution, supported by the occurrence of longer and higher desaturated homologous fatty acids. However, increased elongase and desaturase activity is unlikely to fulfill the gap observed in fatty acid composition resulting from decreased highly unsaturated fatty acids intake.
- Subjects :
- Acetyltransferases metabolism
Animals
Fatty Acid Elongases
Fatty Acids, Omega-3 administration & dosage
Fatty Acids, Omega-6 administration & dosage
Fish Oils administration & dosage
Linoleoyl-CoA Desaturase metabolism
Plant Oils administration & dosage
Dietary Fats pharmacology
Fatty Acids metabolism
Perciformes metabolism
Subjects
Details
- Language :
- English
- ISSN :
- 0021-8561
- Volume :
- 55
- Issue :
- 4
- Database :
- MEDLINE
- Journal :
- Journal of agricultural and food chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 17243697
- Full Text :
- https://doi.org/10.1021/jf062153x