The effect of dietary phosphatidylcholine on the assimilation and distribution of ingested free oleic acid (18:1 n−9) in gilthead seabream ( Sparus aurata) larvae

• Published in: Aquaculture 2003-03, Vol.217 (1), p.577-588
• Main Authors: Hadas, E, Koven, W, Sklan, D, Tandler, A
• Format: Article
• Language: English
• Subjects: Animal aquaculture; Animal productions; Aquaculture; Assimilation; Biological and medical sciences; Dietary fatty acids; Fatty acids; Fish production; Fundamental and applied biological sciences. Psychology; Growth; Lipoprotein; Marine; Marine fish larvae; Phosphatidylcholine; Phospholipid; Pisciculture; Sparus aurata; Vertebrate aquaculture
• ISSN: 0044-8486; 1873-5622
• DOI: 10.1016/S0044-8486(02)00431-3

Two separate studies investigated the effect of dietary phosphatidylcholine (PC) on the assimilation of ingested free fatty acid (FFA) into the tissues of 28-day-old gilthead seabream larvae. Two squid meal based microdiets (MD), labeled with free [1- 14C] 18:1 n−9, were prepared that were identical in their nonlipid fractions and total lipid levels but differed in their lipid compositions. The control MD contained, by dry weight (DW), 10% capelin oil while the treatment MD comprised of 7.5% capelin oil and 2.5% di-stearylphosphatidylcholine. In the first study, the MDs were fed to seabream larvae over 14 h followed by 10 h of food deprivation in the dark. Larval samples were taken after 1, 8, 14 and 24 h and the resultant distribution of radioactivity in whole body lipid fractions was determined. Starting at 8 h and reaching a maximum after 14 h of feeding, larvae fed the PC diet demonstrated higher ( P