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http://dx.doi.org/10.5657/kfas.2002.35.2.110

Changes of Haematological Constituents in the Nile tilapia, Oreochromis niloticus Exposed to HCB and PCBs  

Cho Kyu Seok (Department of Aquatic Life Medicine, Pukyong National University)
Min Eun Young (Department of Aquatic Life Medicine, Pukyong National University)
Kang Ju Chan (Department of Aquatic Life Medicine, Pukyong National University)
Publication Information
Korean Journal of Fisheries and Aquatic Sciences / v.35, no.2, 2002 , pp. 110-114 More about this Journal
Abstract
The study was carried out to investigate the changes of haematological constituents induced by dietary exposure of Hexachlorobenzene (HCB) and Polychlorinated biphenyls (PCBs) in nile tilapia, Oreochhromis niloticus. The nile tilapia were fed pellet with 0.05, 0.25 and 0.50 mg/kg body weight/day of HCB and PCBs for 30 days, respectively. HCB ($\ge$ 0.25 mg/kg) induced a significantly decreased the red blood cell count at 30 days, and the hemoglobin concentration and hematocrit value were significantly decreased after 20 days to 0.50 mg/kg. The diminution of red blood cell count, hemoglobin concentration and hamatocrit value by PCBs was found after 20 days at $\ge$0.25 mg/kg. The concentrations of calcium decreased significantly at 30 days at $\ge$0,25 mg/kg of PCBs-diet. However, magnesium and inorganic phosphorus did not show any noticeable changes in the range of 0.05$\~$o.50 mg/kg of HCB and PCBs compared to control group during the experimental period, The low concentration of total protein was observed at the last day of experiment to 0.50 mg/kg of HCB-diet, while total protein initiated to increase from 20 days at the 0.25 mg/kg of PCBs-diet. The glucose was significantly increased after 20 days at $\ge$0,25 mg/kg of HCB and PCBs, A significant increment GOT and GPT activities was noticed after 20 days at 0.50 mg/kg of HCB and PCBs, These results indicate that hematological and serum biochemical changes in the nile tilapia by dietary exposure to HCB and PCBs are affected at more than 0,25 mg/kg after 20 days.
Keywords
Oreochromis niloticus; HCB; PCBs; Haemotological constituents;
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