Effects of extracts of dried seeds of Toloache, Datura innoxia as anaesthesia on the African catfish Clarias gariepinus fingerlings

Ayuba, V.O. and Ofojekwu, P.C. (2005) Effects of extracts of dried seeds of Toloache, Datura innoxia as anaesthesia on the African catfish Clarias gariepinus fingerlings. In: 19th Annual Conference of the Fisheries Society of Nigeria (FISON) , 29 Nov - 03 Dec 2004 ,Ilorin, Nigeria, pp. 25-29.

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Abstract

The effects of crude extract, pure extract, aqueous, fraction of pure and lipid fraction of pure extract of dried seeds of toloache. Datura innoxia as anaesthesia on the African catfish. Clarias gariepinus fingerlings were studied. The fish were exposed to various doses of the extract in aquaria tanks and the time taken for each fish to reach anaesthesia was recorded. The fish were anaesthetized up to 3.00g/l fingerlings reached anaesthesia is significantly (P<0.05) shorter time (1.004 minutes at 0.05gl) in pure unseparated extract than in crude extract (58.50 minutes at 3.00g/l concentrated). The time to reach anaesthesia decreased with an increase in concentration of the seed extract. Out the two fractions the lipid fraction had significantly (P>0.05) better anaesthetic on the fish. The control produced no observable anaesthetic effect on the fish within three hours. This suggests that the anaesthetizing active ingredent resided in the lipid fraction. All fish recovered from anaesthesia, swam and fed actively and no mortality was observed throughout the exposure period and thereafter. It is therefore recommended for use on C. gariepinus fingerlings

Item Type: Conference or Workshop Item
Title: Effects of extracts of dried seeds of Toloache, Datura innoxia as anaesthesia on the African catfish Clarias gariepinus fingerlings
Personal Creator/Author:
CreatorsEmail
Ayuba, V.O.
Ofojekwu, P.C.
Page Range: pp. 25-29
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; anaesthesia; biological stress; fingerlings; seeds; survival; Clarias gariepinus; Datura innoxia; African catfish
Subjects: Fisheries
Biology
Chemistry
Item ID: 3986
Depositing User: Ms Maria Kalentsits
Date Deposited: 22 Aug 2010 16:34
Last Modified: 29 Sep 2011 16:35
URI: http://aquaticcommons.org/id/eprint/3986

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