The effects of dieldrin on various life stages of the African catfish Clarias gariepinus (Burchell)

Lamai, S.L. and Walker, C.H. and Warner, G.F. (2001) The effects of dieldrin on various life stages of the African catfish Clarias gariepinus (Burchell). In: 14th Annual Conference of the Fisheries Society of Nigeria (FISON) , 19-23 January 1998 ,Ibadan, Nigeria, pp. 186-194.

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Abstract

Early life stages (ELS) of Clarias gariepinus were found to be less sensitive to acute dieldrin toxicity than ELS of Nile tilapia, Oreochromis niloticus; 96 h LC50 for 37 day old fry were 11.7 and 4.95pg/l, respectively. Growth of O. niloticus fry was significantly reduced in 22.4 pg/l dieldrin whereas growth of C. gariepinus fry was unaffected. Adult C. gariepinus rapidly absorbed dieldrin from aquaeous solution and accumulated it in their tissues, especially in the liver where after 30 days in 4.0 pg/l bioconcentration was close to 1000 fold. Chronic exposure of C. gariepinus to dieldrin had no effect on blood haematocrit and haemoglobin, but appeared to slow the growth of catfish, and had a clear negative effect on the reproductive potential of mature females

Item Type: Conference or Workshop Item
Title: The effects of dieldrin on various life stages of the African catfish Clarias gariepinus (Burchell)
Personal Creator/Author:
CreatorsEmail
Lamai, S.L.
Walker, C.H.
Warner, G.F.
Page Range: pp. 186-194
Date: 2001
Event Title: 14th Annual Conference of the Fisheries Society of Nigeria (FISON)
Event Type: Conference
Event Location: Ibadan, Nigeria
Event Dates: 19-23 January 1998
Issuing Agency: Fisheries Society of Nigeria
Uncontrolled Keywords: Nigeria; fry; life cycle; pesticides; pollution effects; toxicity tests; Clarias gariepinus
Subjects: Pollution
Biology
Item ID: 3709
Depositing User: Ms Maria Kalentsits
Date Deposited: 11 Jul 2010 05:57
Last Modified: 29 Sep 2011 16:54
URI: http://aquaticcommons.org/id/eprint/3709

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