A Biochemical Study On Fresh Water Fish Subjected To Different Environmental Pollutants

The present work was planned to study some biochemical and physiological changes in the blood and tissue of tilapia aurea in relation to different concentrations of iron ,zinc and their mixture in decholerinated tap water.A total number of fishes 324 of tilapia aurea range from 14-17 cm in body length and PH range from 7.5 - 8.5 were used.They were randomly selected from Abassa fish farm Abu-Hamad-Sharkia. Theblood and tissue samples were collected in four times after 90 days ofexposure to pollutants ( iron, zinc, and their mixture) and throughout ofthe recovery period ( decho1inerated tape water free from pollutants)The fishes were classified according to the different pollutants doseswhich are: -1 - Group 1 : iron only with 1 ppm2 - Group 2 : iron only with 2 ppm3 - Group 3 : iron only with 3 ppm4 - Group 4 : zinc only with 3.93 ppm5 - Group 5 : zinc only with 7.86 ppm6 - Group 6 : iron with 1 ppm and zinc 3.93 ppm7 - Group 7 : iron with 2 ppm and zinc 3.93 ppm8 - Group 8 : iron with 3 ppm and zinc 3.93 ppm9 - Group 9 : control group without dose The work was designed to study the following :-A - Bioaccumolation of iron and zinc in the blood and tissues