07 Oca 2025 Salı
Seasonal variation in fatty acid profiles of Mesopotamian River Fish from Southeast Türkiye
Abstract : The study compared the seasonal fatty acid profiles of commonly consumed fish species such as Acanthobrama marmid, Capoeta umbla, Capoeta trutta, Carassius gibelio and Chondrostoma regium, from Beyazsu Stream, Mardin, and Southeast Türkiye. Both C. regium and C. umbla show higher total lipid content in summer and winter, ranging from 5.65% to 6.03% and 5.02% to 5.16%, respectively, placing them in the medium-fat fish category. The levels of C18:0 in all fish decrease during winter. A. marmid recorded the highest concentration of ∑SFA at 42.49% during summer, while C. umbla exhibited the highest ∑MUFA levels at 43.95% during winter, and C. trutta displayed the highest ∑PUFA level, reaching 38.88% in winter. The ratio of ω3/ω6 among fish varied from 0.50 to 0.78 in summer and between 0.60 and 0.86 in winter. In winter, fish have increased levels of PUFAs, specifically C18:2ω6, C20:4ω6, C20:5ω3, C22:5ω3, and C22:6ω3. Generally, colder water temperatures and slower metabolism in winter cause fish to accumulate more PUFA and lipids for energy storage. Nevertheless, factors such as diet, metabolic activity, and environmental conditions may have contributed to the increase in PUFA levels in the fish during the winter. As a result, the findings are valuable both for emphasizing the importance of consuming fish with optimal fatty acid profiles for human health and for displaying the lipid physiology of the Mesopotamian fish species in response to seasonal changes.