17 S. Mahboob H. F. Alkahem Al- Balawi F. Al-Misned K. A. Al-Ghanim Z. Ahmed Journal of Animal and Plant Sciences JAPS 20142014/04/01 24 2 475-480 1018-7081 NA <p>Fish samples were collected at Wadi Hanefah (WH) and in an unpolluted commercial fish farm designated as the control site (CS). Several antioxidants (superoxide dismutase (SOD), catalase (CAT), glutathione S-transferase (GST) and glutathione (GSH)) and the oxidant malondialdehyde (MDA) were selected as bioindicators, and their concentrations were assessed in&nbsp;<em>Poecilia latipinna&nbsp;</em>from WH and CS. SOD activity was increased by 52.8% in the kidney, 61.3% in the liver and 18.2% in the heart of&nbsp;<em>P. latipinna&nbsp;</em>from WH, whereas a significant decrease (39.4%) was observed in the gills compared to the control fish,&nbsp;<em>P. latipinna</em>. In contrast, CAT activity was decreased by 33.2%, 49.2%, 52.1% and 56.2% in the gills, kidney, heart and liver, respectively in&nbsp;<em>P. latipinna&nbsp;</em>from WH. GST activity was also increased in the kidney, heart and liver of&nbsp;<em>P. latipinna&nbsp;</em>from WH by 34.4%, 42.2% and 54%. However, GST activity was decreased (55%) in the gills of fish from WH compared to the fish from CS. GSH concentrations were increased by 44.8%, 35.3% and 32.7% in the kidney, heart and liver but were decreased by 33.6% in the gills. MDA levels in&nbsp;<em>P. latipinna&nbsp;</em>from WH were increased in the gills, kidney, heart and liver by 83.3%, 167.3%, 161.4% and 178.7%.</p> P. latipinna, biomarkers, oxidative stress, pollution, biomonitoring Pakistan Agricultural Scientists Forum https://thejaps.org.pk/AbstractView.aspx?mid=2014-JAPS-68