Effects of prophylactics on growth, and hematology of African catfish, Clarias gariepinus (Burchell, 1822) fingerlings

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Clarias gariepinusfish were treated with 2 ppm, 150 ppm, and 100 ppm of potassium permanganate, hydrogen peroxide, and formalin respectively. After a 70-day culture period, growth and hematological indices were measured. Data were subjected to one-way ANOVA and the mean were separated using the New Duncan Multiple range test at p ≤ 0.05. Results indicated that fish treated with potassium permanganate had the highest weight gain (5.31 ± 1.66 g) while the least (3.70 ± 0.28 g) was recorded in fish treated with hydrogen peroxide. The control fish had the highest (1.91 ± 2.28) feed conversion ratio while the least (1.47 ± 0.41) was recorded in catfish fingerlings treated with potassium permanganate. White blood cells were more (6.23 ± 0.25) in fish treated with formalin and lowest in control fish. Hemoglobin values were similar in control fish (12.45 ± 2.03) and potassium permanganate(13.09 ± 0.98) treated fish. Apart from PCV that decreased in fish treated with H2O2 and formalin, other red blood indices increased significantly (p ≤ 0.05) against the control. Potassium permanganate appeared to have the least negative effect on the fish. The study, therefore, recommends the use of potassium at 2 ppm for treatments in catfish fingerlings aquaculture.  

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