EFFECT OF SODIUM HYPOCHLORITE (NaOCl) ON FERTILITY, HATCHABILITY AND SURVIVAL OF FRY OF CLARIAS GARIEPINUS

Ijeoma Fvaour Vincent-Akpu, Edafe Odioko, Mercy Trinya Jack

Abstract


The use of Sodium hypochlorite (NaOCl) often as disinfectants in hospitals in treating wastewater in order to prevent the spread of pathogenic microorganisms, causal agents of nosocomial infectious diseases and as bleaching agent for washing cloth have led to it been released in large quantity into the environment. This chemical finds its way into the aquatic ecosystem through runoffs.This aim of this study was to evaluate the effect of sodium hypochlorite (NaOCl) on fertility, hatchability and survival of Clarias gariepinus eggs exposed to sublethal concentrations of sodium hypochlorite after 28 days. The eggs of Clarias gariepinus were fertilized and incubated in sublethal concentrations (0.2 mg/L, 1 mg/L, 1.5 mg/L and 5 mg/L) of sodium hypochlorite and control. The percentage of fertilized eggs, percent hatchability and survival rate were calculated. There was concentration dependent reduction in hatchability of eggs and survival rates of fry exposed to sodium hypochlorite solution. These reductions were significantly difference for the different concentrations at p < 0.05. This implies that sodium hypochlorite inhibits hatchability and survival of Clarias gariepinus which could disrupt reproductive process of this species in the wild.

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DOI: http://dx.doi.org/10.15835/agrisp.v107i3-4.13062



Copyright (c) 2018 ijeoma Fvaour Vincent-Akpu, Edafe Odioko, Mercy Trinya Jack

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