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)
