Changes in the activity of antioxidant enzymes during four seasons in Mugil capito fish from Qarun Lake, Egypt

Abstract

Amal S. Mohamed, Mohamed A. El- Desoky, Nahed S. Gad and Adel A. El-Lahamy

Superoxide dismutase (SOD) and catalase (CAT) enzymes activity of Mugil.capito fish were chosen as bio indicators for pollution in the Qarun Lake. Fish (Mugil.capito) were collected from Qarun Lake seasonally during (August 2014 to May 2015) to determine the activities of antioxidant defense enzymes (SOD and CAT) in the liver and performing meat quality of fish through analysis of total proteins and total lipids in muscles. The results showed that SOD activity in the liver of M.capito fish collected from eastern, middle, and western part of the lake was increased significantly (p≤05) compared to the control value seasonally. Catalase Activity in the liver of M.capito fish from the eastern and middle part of the lake showed significant increased compared with control value (p≤.0.05) in summer, autumn and spring and insignificant in winter season. While samples of M.capito from the western part of the lake showed significant increase in autumn and insignificant increase in summer, winter and spring season.Total protein levels in the muscle decreased significantly (p≤0.05) reaching its minimum value in the muscle of fish from the eastern part of the lake. While, total lipid content in the muscle was increased significantly (p<.05) reaching its maximum value in the muscle of fish from the eastern part of the lake.

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