Positional Distribution of Fatty Acids in Triacylglycerols and Phospholipids from Fillets of Atlantic Salmon (Salmo Salar) Fed Vegetable and Fish Oil Blends

• Published in: Marine Drugs
• Main Authors: Ruiz-López, Noemí, Stubhaug, Ingunn, Ipharraguerre, Ignacio, Rimbach, Gerald, Menoyo, David
• Other Authors: European Commission, Consejo Superior de Investigaciones Científicas (España)
• Format: Article in Journal/Newspaper
• Language: English
• Published: Multidisciplinary Digital Publishing Institute 2015
• Subjects: Salmon (Salmo salar); Omega 3 fatty acids; Positional distribution; Functional foods; Atlantic salmon; Salmo salar
• Online Access: http://hdl.handle.net/10261/137286; https://doi.org/10.3390/md13074255; https://doi.org/10.13039/501100000780; https://doi.org/10.13039/501100003339

The nutritional and functional characteristics of dietary fat are related to the fatty acid (FA) composition and its positional distribution in the triacylglycerol (TAG) fraction. Atlantic salmon is an important source of healthy long chain omega 3 FA (particularly, eicosapentaenoic (EPA) and docoxahexaenoic (DHA) acids). However, the impact of lipid sources in salmon feeds on the regiospecificity of FA in the fish TAG remains to be explored. The present study determines the effect of feeding salmon with blends of palm, rapeseed, and fish oil, providing two different EPA + DHA concentrations (high: H-ED 10.3% and low: L-ED 4.6%) on the fillet lipid class composition and the positional distribution of FA in TAG and phospholipids. The regiospecific analysis of fillet TAG showed that around 50% of the EPA and around 80% of DHA was located in the sn-2 position. The positional distribution of FA in phosphatidylcholine (PC), showed that around 80% of the EPA and around 90% of DHA were located in the sn-2. Fish fed the vegetable-rich diets showed higher EPA in the sn-2 position in PC (77% vs. 83% in the H-ED and L-ED diets, respectively) but similar DHA concentrations. It is concluded that feeding salmon with different EPA + DHA concentrations does not affect their positional distribution in the fillet TAG. This research has been supported by EU grant MC-IAPP GA285856. We acknowledge support by the CSIC Open Access Publication Initiative through its Unit of Information Resources for Research (URICI). Peer reviewed