Acute Toxicity of Mercury (HgCl2) to African Catfish, Clarias gariepinus

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Guedenon, P.
Edorh, A.P.
Hounkpatin, A.S.Y.
Alimba, C.G.
Ogunkanmi, L.A.
Nwokejiegbe, E.G.
Boko, M.
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Research Journal of Chemical Sciences
In order to assess the acute toxicity of mercury on Clarias gariepinus, 108 fish of mean weight 51.27 g ± 2.01 and mean length 20. 2 cm ± 0.72 were divided into six groups of six fish each. The different groups were exposed to the different concentrations of 0 mg/L, 0.3 mg/L, 0.5 mg/L, 0.8 mg/L, 1 mg/L et 1.50 mg/L for a period of 96 hours. The experiment was triplicated. The results revealed that all the fish of groups exposed to 0 mg/L of HgCl2 (control) survived whereas all the fish of groups exposed to 1 mg/L and 1.5 mg/L died. The determination of 96 hours LC50 was carried out by computing the mortality results in Probit program of SPSS (version 17.0). The median lethal concentration was 0.60 mg/L with lower and upper confidence limits of 0.135 mg/L and 3.519 mg/L respectively at 95%
Clarias gariepinus, mercury, acute toxicity, lethal concentration
Guedenon, P., Edorh, A.P., Hounkpatin, A.S.Y., Alimba, C.G., Ogunkanmi, L.A., Nwokejiegbe, E.G and Boko, M. 2012. Acute Toxicity of Mercury (HgCl2) to African Catfish, Clarias gariepinus. Research Journal of Chemical Sciences. 2(3): 41-45