Fatty Acid Profile And Cholesterol Content Of Juvenile Rainbow Trout (Oncorhynchus Mykiss) And Common Carp Fry (Cyprinus Carpio)

Abstract

Fatty acid profile and cholesterol content were investigated in rainbow trout and common carp, farmed in intensive and semi-intensive pounds respectively. Fatty acid contents of the relevant fish feeds were investigated, too. Fatty acid methyl esters were determined by GC/FID. Cholesterol was analyzed by HPLC/PDA at 210nm. Palmitic acid was major component of the saturated fatty acids in trout (19.04%), as well as in carp (16.40%). The total content of n-3 fatty acids in trout was 13.27%, with 22:6 n-3, as the most abundant one (6.04%). The Σn-3/Σn-6 ratio in trout was 0.90±0.05. Higher content of linoleic acid (18:2 n-6) in carp (29.14%) increases the contribution of n-6 fatty acids to the total fatty acid content. The Σn-3/Σn-6 ratio in carp was 0.09±0.01. Fat content (2.01±0.63%) and cholesterol (41.74±2.08 mg/100g) determined in trout were lower than their content in carp (4.57±0.73% and 48.45±4.44 mg/100g).