Abstract
The study examined the fatty acids composition and main nutrients composition in two freshwater fish species in the Czech Republic during one year. Samples of common carp and rainbow trout were taken from a market chain during a year. All samples were homogenized and analyzed for lipid, protein, water, and ash contents. Energy value (E), sum of polyunsaturated fatty acids (PUFA), monounsaturated fatty acids (MUFA) and saturated fatty acids (SFA), atherogenic index (AI) and thrombogenic index (TI) were then calculated. The freshwater fish on the Czech market chain have beneficial average value content of unsaturated fatty acids, Σ MUFA+PUFA in carp is 69.46% of all fatty acids, similar average value of Σ MUFA+PUFA - 70.83% is in rainbow trout. The calculated average value of AI in carp is 0.52 (SD = 0.06), AI in rainbow trout is 0.63 (SD = 0.07), the average TI in carp is 0.63 (SD = 0.09), TI in rainbow trout is 0.49 (SD = 0.05). Freshwater fish in the Czech market chain have beneficial value of PUFA, so AI and TI indices are low in both species of analysed fish. Regular consumption of fish meat is important in the prevention of cardiovascular diseases.
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