About Bioline  All Journals  Testimonials  Membership  News

Journal of Applied Sciences and Environmental Management
World Bank assisted National Agricultural Research Project (NARP) - University of Port Harcourt
ISSN: 1119-8362
Vol. 6, No. 2, 2002, pp. 37-41
Bioline Code: ja02026
Full paper language: English
Document type: Research Article
Document available free of charge

Journal of Applied Sciences and Environmental Management, Vol. 6, No. 2, 2002, pp. 37-41

 en Effect of Lethal and Sub-lethal Concentrations of Tobacco (Nicotiana Tobaccum) Leaf Dust Extract on Weight and Hematological Changes in Clarias Gariepinus (Burchell)


Lethal and sub-lethal bioassays on Clarias gariepinus check for this species in other resources were conducted to evaluate the toxicity of tobacco ( Nicotiana tobaccum check for this species in other resources ) leaf dust on weight gain and haematological indices of Clarias gariepinus (mean weight 10.5±0.70g) in glass aquaria with aeration system. The concentrations used during the lethal exposure are: 2.00, 1.00, 0.50, 0.25g/l and a control (0.00g/l); while the concentrations of the toxicant used during the 21-days sub-lethal exposure were 0.30, 0.15, 0.10, 0.05g/l and a control (0.00g/l). The 48-h LC50 estimated by probit analysis during acute exposure was found to be 626.0 mg/l. The results obtained from the sub-lethal exposure showed that there was a progressive decrease in weight of fish as the concentration of the toxicant increased. Also, haematological indices indicated that the fish became anaemic and the severity of this condition was directly proportional to the tobacco dust concentrations. @JASEM

© Copyright 2002 - Journal of Applied Sciences & Environmental Management

Home Faq Resources Email Bioline
© Bioline International, 1989 - 2024, Site last up-dated on 01-Sep-2022.
Site created and maintained by the Reference Center on Environmental Information, CRIA, Brazil
System hosted by the Google Cloud Platform, GCP, Brazil