Volume 15, Issue 1 (Spring 2025)
J. Aqua. Eco 2025, 15(1): 12-19 |
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Effect of salinity changes on the antioxidant enzymes in the blood plasma of grey mullet (Mugil cephalus, Linnaeus, 1758). J. Aqua. Eco 2025; 15 (1) :12-19
URL: http://jae.hormozgan.ac.ir/article-1-1102-en.html
URL: http://jae.hormozgan.ac.ir/article-1-1102-en.html
Abstract: (155 Views)
This study investigated the effects of salinity fluctuations on antioxidant enzyme activity in the blood plasma of gray mullet (Mugil cephalus). Fish specimens were obtained from the Chabahar Distant Waters Fisheries Research Center and exposed to salinity treatments of 5, 20, and 50 g/L, with 40 g/L serving as the control. Blood samples were collected from the caudal peduncle on days 1, 7, and 21 of the experiment, and the activity levels of three antioxidant enzymes—catalase (CAT), superoxide dismutase (SOD), and glutathione peroxidase (GPx)—were measured in plasma. The lowest CAT activity was recorded in the 20 g/L treatment on day 21, with no significant difference compared to the control and 5 g/L treatments (p ≥ 0.01). The highest CAT activity was observed in the 50 g/L treatment. SOD activity was lowest in the control and 5 g/L treatments on day 21 and was significantly lower than in the 20 and 50 g/L treatments (p ≤ 0.01). The highest SOD activity occurred in the 50 g/L treatment. GPx activity was lowest in the control group on day 21 and was significantly lower than in all other treatments (p ≤ 0.01), while the highest GPx activity was observed in the 20 g/L treatment. Overall, the results demonstrate that salinity fluctuations significantly influence the activity of antioxidant enzymes in M. cephalus, potentially affecting physiological responses and growth performance.
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