THE IMPACT OF ZEOLITE AGAINST CADMIUM CHLORIDE TOXICITY IN NILE TILAPIA (Oreochromis niloticus)
Shalaby1; Abd El-Aziz A. Diab2; Ahmed A.
Abd Elrahman; El- Shaimaa G.M. Shalaby4 and
Maaly A. Mohamed3
1Fish physiology, central laboratory for Aquaculture research, abbassa, Abo-Hammed, Sharkia; 2 Zoology Department, Faculty of Science, Zagazig University, Sharkia; 3 Chemistry of natural and microbial production, national center for research, Giza, Egypt; 4Fish biology and ecology, central laboratory for Aquaculture research.
Received 16/ 9/ 2018
Accepted 23/ 10/ 2018
The present study aims to evaluat the possible ameliorative effect of Zeolite against cadmium toxicity in Tilapia Nilotica. fishes of Nile tilapia were divided into nine groups. The 1st group (lefet as control group without any addition. The 2nd, 3rd, 4th groups contains to 0.17, 0.35, 0.7 and 1.4 gm of Cdcl2/L, respectivelyy. Also the 5th, 6th, 7th, 8 th and 9 th contains (0.17, 0.35, 0.7 and 1.4Cd+ 8g of Zolite, respectively). After 90 days of exposurefish to Cd a reduction significantly (P<0.05) in haemoglobin content (Hb), haematocrit value (Hct). These parameters were improved when zolite was applied with Cd. The values of Hb and Hct were increased significantly to be as in the control fish group. There were significant decreased in total protein (TP) and albumen levels in plasma of fish exposed to Cd alone. While, these values were improved in fish after addition of zolite with low doses of cadmium. Also plasma glucose concentration, cholesterol, triglycerides, aspartate aminotransferase (AST), alanine aminotransferase (ALT) alkaline phosphatase (ALP), creatinine and Urea concentrations were increased significantly in fish exposed to Cd alone. Addition of zolite to Cd contaminated medium enhanced these biochemical parameters in fish and the enzyme activities returned to be as control group. Fish exposed to Cd alone accumulates 2.01, 2.38, 2.73 and 5.48 mg Cd/g dry weight in gills after exposure to all doses of Cd toxicity respectively. Addition of zolite to Cd contaminated medium considerably reduced cadmium absorption and accumulation in gills.
Keywords: Zeolite, cadmium chloride, Nile tilapia.