Scholarly work in the Department of Fishery and Water Resources

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Browsing Scholarly work in the Department of Fishery and Water Resources by Author "Agbelege O. O."

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    Haematological effect of acute concentration of cypermethrin on juveniles of clarias gariepinus
    (International Journal of Engineering Science Invention, 2013) Kolo Reuben Jiya; Ojutiku R. O.; Asuwaju F. P.; Obande R. A.; Agbelege O. O.
    The experiment was conducted to evaluate the acute toxic of cypermethrin, a synthetic pyrethroids on juveniles of Clarias gariepinus. The effect was assessed based on the comparism results of haematology, examinations of control and experimental group exposed to five nominal concentration of cypavest, 10EC Pesticide Preparation (active substance 100mg/l) of cypermethrin in a static non- renewal bioassay for 96hours. Examination of haematology significantly showed higher value (P < 0.001; 0.01) of white blood cell (WBC), mean corpuscular volume (MCV), mean corpuscular hemoglobin (MCH), packed cell volume (PCV), monophilis and heterophilis; a significant reduction (P < 0.001, 0.01) in Red Blood Cell (RBC) and Lymphocyte was obtained as compared to the control.cypermethrin is therefore toxic to juveniles of Clarias gariepinus.
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    Toxicity and Histopathological Effect of Cypermethrin on Juveniles of Clarias gariepinus
    (British Journal of Applied Science & Technology, 2014) Kolo Reuben Jiya; Ojutiku R. O.; Asuwaju F. P.; Obande R. A.; Agbelege O. O.
    Aim: To study the toxicity and histopathological effects of Cypermethrin on the gill and liver tissues of the Clarias gariepinus. Place of the Study: It was carried out at the toxicology section of the of Water Resources, Aquaculture and Fisheries Technology Department, School of Agriculture and Agricultural Technology of the Federal university, Minna, Niger State, Nigeria. Methodology: The fish were exposed to six (6) acute concentrations (0.025mg/l, 0.050mg/l, 0.075mg/l, 0.100mg/l, 0.125mg/l and 0.000mg/l) for 96 hours. The histopathology of the gills and liver were determined and the LC50 was determined. Results: The 96 hours LC50 of the toxicant to the test fish was 0.060mg/L. The most common gill changes at all doses of cypermethrin in solution were destruction of gill lamella, epithelial hyperplasia and epithelial hypertrophy. Hepatic lesions in the liver tissues of fish exposed to Cypermethrin in solution were characterized by degeneration ofhepatocyte, vascuolization of cell cytoplasm, fatty degeneration and hypertrophy of hepatocytes. Histological comparison of tissues indicated that most damage occurred in the gill rather than in the liver. Conclusion: Juveniles of Clarias gariepinus exposed to various concentration of Cypermethrin showed that this synthetic pyrethroid was highly toxic to the Clarias gariepinus fingerlings with lethal concentration (LC50) of 0.060mg/l. Evidences of toxicity manifested significantly in the damages caused to the gills and liver studied. The severity of these damages to some selected organs in the body of the fish is proportional to the concentration of the pesticides.