Olatayo, V.S. (2005) Studies of the effects from extracts from two local plants (Tephrosia vogelii and Parkia clappertoniana) on Clarias gariepinus (Tengels). In: 19th Annual Conference of the Fisheries Society of Nigeria (FISON) , 29 Nov - 03 Dec 2004 , Ilorin, Nigeria.
![[img]](http://aquaticcommons.org/style/images/fileicons/application_pdf.png)
| PDF - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader Download (591Kb) | Preview |
Abstract
Studies were carried out using 96hr static toxicity bioassay to determine the effect of lethal concentrations of extracts from two local plants Tephrosia vogelii and Parkia clappertoniana which are known fish poison, on a species of mud fish. Clarias gariepinus Phytochemical analysis of the plant extracts was done and the extract from T. vogelii was found to contain alkaloids, tannins and flavonoids, while the extract from P. clappertoniana was formed to contain alkaloids tannins and saponins. Experimental fish were exposed to test water separately polluted by varying concentrations of extraction of both plant species ranging from 0.50mgl super(-1), 1.50mgl super(-1), 2.50mgl super(-1), 3.0mgl super(-1), 5.00mgl super(-1), 10.00mgl super(-1) in the case of T. vogelii and 5.00mgl super(-1), 7.50mgl super(-1), 10.00mgl super(-1), 15.00mgl super(-1), 20.00mgl super(-1) and 30.00mgl super(-1) in the case of P. clappertaniana. Behavioural hispathological and heamatological examinations were made. Both plant extracts were found to have lethal effects at the higher concentrations, affecting the gills and the central nervous system as well as having a depressive effect on the total count and increasing platelet and white blood cell count. Symptoms of toxicosis observed include, initial inactivation agitated swimming, tumbling movement air gulping, increased opercular beat and period of quiescence/knockdown before death. Marked differences were also observed in the hematological and histopathological analysis of poisoned fish. Lower concentrations of the extracts had sub lethal effects on the fish, which manifested as zigzag movement air gulping increased opercular movement etc. None of these effects were observed in the control experiment
| Item Type: | Conference or Workshop Item | ||||
|---|---|---|---|---|---|
| Title: | Studies of the effects from extracts from two local plants (Tephrosia vogelii and Parkia clappertoniana) on Clarias gariepinus (Tengels) | ||||
| Personal Creator/Author: |
| ||||
| Page Range: | pp. 128-135 | ||||
| Date: | 2005 | ||||
| Event Title: | 19th Annual Conference of the Fisheries Society of Nigeria (FISON) | ||||
| Event Type: | Conference | ||||
| Event Location: | Ilorin, Nigeria | ||||
| Event Dates: | 29 Nov - 03 Dec 2004 | ||||
| Issuing Agency: | Fisheries Society of Nigeria | ||||
| Uncontrolled Keywords: | Nigeria; alkaloids; behaviour; biological poisons; histopathology; lethal effects; metabolites; plant populations; pollutants; sublethal effects; symptoms; toxicity tests; Clarias gariepinus; Parkia clappertoniana; Tephrosia vogelii | ||||
| Subjects: | Pollution Aquaculture Biology | ||||
| Item ID: | 4002 | ||||
| Depositing User: | Mr Luigi Baldassari | ||||
| Date Deposited: | 22 Aug 2010 18:07 | ||||
| Last Modified: | 29 Sep 2011 18:36 | ||||
| URI: | http://aquaticcommons.org/id/eprint/4002 |
Actions (login required)
| View Item |
