|Journal of Research in Environmental Science and Toxicology (ISSN: 2315-5698) Vol. 6(1) pp. 008-011, May 2017. DOI: http:/dx.doi.org/10.14303/jrest.2017.016. Copyright © 2017 International Research Journals
Full Length Research Paper
Toxic stress exhibited by juveniles of Clarias gariepinus exposed to different concentration of lead
*Azua E.T and Akaahan T. J
Department of Biological Sciences Federal University of Agriculture Makurdi, P.M.B. 2373 Makurdi Benue state Nigeria
*Corresponding Author’s E-mail:firstname.lastname@example.org
Received April 15, 2017; Accepted May 10, 2017
The toxic stress of lead exposed to Clarias garienpinus was determined at 96-hour. Anhydrous Lead II nitrate was used to prepare the stock solution. The concentrations of lead used were: 0.00, 1.80, 3.20, 5.60, and 10.60mg/L. The lethal concentration (LC50) was estimated using the logarithmic method and was found to be5.60mg/L. The lethal concentration confirmed that lead II nitrate is highly toxic to Clarias garienpinus. The Fish showed various abnormal behaviors upon exposure to lead II nitrate, immediate reaction was erratic swimming and tendency to jump out of the test bowl. Others include restlessness, uncoordinated movement, vertical swimming, air gulping, loss of equilibrium, a period of quiescence and eventually death. There is need for more work to set maximum permissible levels of metals for fish meant for human consumption in Nigeria.
Keywords: Toxic stress, Lead, Clarias garienpinus.