African Journal of Biotechnology Vol. 3 (11), pp. 627-630, November 2004
ISSN 1684–5315 © 2004 Academic Journals

Short Communication

Toxicity of Parkia biglobosa and Raphia vinifera extracts on Clarias gariepinus juveniles

Fafioye, O.O.¹* Adebisi, A.A.² and Fagade, S.O.²

¹Department of Biological Sciences, Ogun State University, P.M.B 2002, Ago – Iwoye, Nigeria.

²Department of Zoology, University of Ibadan, Nigeria.

*Corresponding author.E-Mail: ofafioye@yahoo.com.

Accepted  29 September, 2004

Acute toxicity tests were carried out with aqueous and ethanolic extracts of two botanicals on Clarias gariepinus juveniles. 96-h LC50 values for Parkia biglobosa aqueous (AEPB) and ethanolic extracts (EEPB) were 2.8 and 2.4 ppm, respectively. While for Raphia vinifera aqueous (AERV) and ethanolic extracts (EERV), the values were 3.4 and 3.2 ppm, respectively. The resulting 96-h LC50 values showed that extracts of P. biglobosa were more potent than the extracts of R. vinifera and that EEPB was the most toxic. Histopathological changes in liver and gill of exposed fish showed subtle cellular damages like necrosis, lesions, oedema and hepatocytes.

Key words: Botanicals, toxicity, juveniles, Clarias gariepinus.