Abstract
In this study, the fatty acid compounds in the muscle tissues of Mesopotamian catfish (Silurus triostegus, Heckel, 1843) and Shabut (Arabibarbus grypus, Heckel, 1843), which live in Ilısu Dam Lake on the Tigris River and have economic importance. For fatty acid analysis, muscle tissues were taken from the samples obtained from local fishermen, placed in tubes and lipids were obtained by applying chloroform/methanol method. The methylation steps of fatty acids in the samples were performed in accordance with TS EN ISO 12966:2 (TS EN ISO 12966-2., 2017) method. The total fatty acid content of saturated fatty acids (SFA) value was detected as 27,97 ± 0,26 in A.grypus, 32.46 ± 0.37 in S. triostegus, The value of Monounsaturated Fatty Acids (MUFA) varied between 42.63 ± 0.6% in A. grypus and 41.5 ± 0.51% in S. triostegus. Total polyunsaturated polyunsaturated acids (PUFA) ranged between 21.83 ± 1.49 for A. grypus and 25.82 ± 1.94 for S. triostegus. MUFA values in all samples were higher than SFA and PUFA values for both fish species. Docosa Hexaenoic Acid (DHA) and Eicosa Pentaenoic Acid (EPA) are commonly consumed omega-3 types. A. grypus and S. triostegus are within the recommended limits for EPA (C20:5n3) and DHA (C22:6n3). For A. grypus, ω3/ω6 values were (1,06); for S. triostegus ω3/ω6 values were (1,38). When the ω3/ω6 values of both fish species were analysed for human health, it was determined that the ω3/ω6 values of omega fatty acids A. grypus and S. triostegus were above 1. As a result information on the composition of 20 types of fatty acids and ω3/ω6 amounts were obtained in muscle tissue of A. grypus and S. triostegus species living in Ilısu Dam Lake and most preferred by local people. The levels of fat and its components in these species, which may cause different problems when accumulated in the body as a result of changing consumption habits, were indicated in the study.
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