GPx, SOD, CAT enzyme activities and Vitamin A values in the Marmara and Black Sea Region Scad’s Liver

The amount and number of pollutants causing marine pollution are increasing day by day. The use of antioxidant defense system components as biomarkers in aquatic species is preferred for early detection of contamination. In this study, the activities of GPx, SOD and CAT enzymes and vitamin A status in the liver of scad (Trachurus trachurus) from the Black Sea and Marmara Sea pelagic fishes were investigated. Samples were collected march (1st period) and November (2nd period). Compared to the Marmara Sea scads, the second term GPx activity was increased according to the 1st rotation (p ≤ 0.01) and the 2nd Term vitamin A level was found to be lower than the 1st rotation (p ≤ 0,05). In the comparison of Marmara and the Black Sea, GPx activity was found higher in Black Sea scad’s compared to Marmara (p ≤ 0.05). CAT activity and vitamin A level in both periods was lower in the Black Sea samples than in Marmara (CAT:1st period p ≤ 0,01, 2nd period p ≤ 0,05; vitamin A:1st period p ≤ 0,05, 2nd period p ≤ 0,01). Antioxidant system parameters, which are biomonitor of pollution in marine fishes, the study of pelagic fish between carnivorous and herbivorous species, between surface and bottom fish species, migratory fishes and nonimmigrant sea fish both within and between them will enable us to obtain more detailed information about the antioxidant system of our marine fishes and to consume healthier seafood. In this study, the relationship between marine pollution and pelagic fish's antioxidant metabolism has been investigated and in terms of the obtained data, it can be a source of work to be done in this respect