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International Journal of Fisheries and Aquatic Studies
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(ICV-Poland) Impact Value: 76.37, Impact Factor: RJIF 5.69
E-ISSN: 2347-5129, P-ISSN: 2394-0506

International Journal of Fisheries and Aquatic Studies

2018, Vol. 6, Issue 2, Part H

Toxicity of aqueous extracts of bitter leaf (Vernonia amygdalina) on haematological profile of African catfish (Clarias gariepinus) juveniles


Author(s): Olowolafe T and Olufayo MO

Abstract: The toxic effects of the aqueous extracts of Vernonia amygdalina on Clarias gariepenus were investigated under laboratory conditions a 96h exposure period using blood profile and behavioral responses as biomarkers of environmental quality in toxicity testing. One hundred and eighty (180) healthy juveniles of C. gariepinus (17.05±0.25g) were acclimatized for a week, weighed and randomly distributed into eighteen bioassay tanks (20L) with stocking density of ten (10) fish per tank. A range finding test was conducted prior to the experiment. The fish were later exposed to 0ml (contol), 40ml, 45ml, 50ml, 55ml, and 60ml per litre concentrations of aqueous extracts of V. amygdalina for 96hrs in a static bioassay procedure. The erratic swimming led to loss of equilibrium, respiratory disturbance, lethargies and mortality of the text organisms which then increased significantly with increasing concentrations of plant extract. Differences observed in the mortalities of C. gariepenus at varying concentrations were significant (P < 0.05). Hematological indices indicated a significant (P < 0.05) decreasing trend in the red blood cell, haemoglobin and the packed cell volume with increasing concentrations of V. amygdalina while the leucocyte counts increased with increasing concentrations of V. amydgalina. The 96h LC50 was determined as 53.52ml/l.

Pages: 596-600  |  257 Views  19 Downloads

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How to cite this article:
Olowolafe T and Olufayo MO. Toxicity of aqueous extracts of bitter leaf (Vernonia amygdalina) on haematological profile of African catfish (Clarias gariepinus) juveniles. International Journal of Fisheries and Aquatic Studies. 2018; 6(2): 596-600.
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