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Abstract
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Article Information:
Acute Toxicity of Lindane (Gamma Hexachloro-Cyclohexane) to African Catfish (Clarias gariepinus, Burchell, 1822)
E.O. Lawson, P.E. Ndimele, A.A. Jimoh and O.O. Whenu
Corresponding Author: Ndimele Prince Emeka
Submitted: 2011 January, 10
Accepted: 2011 February, 07
Published: 2011 April, 05 |
Abstract:
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The acute toxicity of Lindane to African Catfish (Clarias gariepinus) juveniles was assessed in a
static renewal bioassay for 96 h to examine the effects of Lindane on C. gariepinus, ascertain their level of
tolerance and their suitability as bio-indicator in freshwater ecosystems. Eight graded concentrations of lindane
were prepared as 0.9, 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6 ppm and a control experiment (0.0 ppm). The 96 h median
lethal concentration (LC50) value computed using probit method was 1.29 ppm. The median lethal time (LT50)
of 0.9, 1.0 and 1.1 ppm was zero while the LT50 of 1.2, 1.3 and 1.4 ppm are 4365 min (~73 h), 3548 min
(~59 h) and 2884 min (~48 h), respectively. The minimum lethal concentration was 1.40 ppm while the
minimum lethal time was 4365 min (~73 h). At various concentrations of lindane, fish showed uncoordinated
behaviour such as incessant gulping of air and increase in opercular ventilation. The number of survivors in
each concentration differ significantly (p<0.05) from others. The results show that lindane is highly toxic to
Clarias gariepinus juveniles.
Key words: Clarias gariepinus, LC50, LT50, Lindane, minimum lethal concentration, minimum lethal time,
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Cite this Reference:
E.O. Lawson, P.E. Ndimele, A.A. Jimoh and O.O. Whenu, . Acute Toxicity of Lindane (Gamma Hexachloro-Cyclohexane) to African Catfish (Clarias gariepinus, Burchell, 1822). International Journal of Animal and Veterinary Advances, (2): 63-68.
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ISSN (Online): 2041-2908
ISSN (Print): 2041-2894 |
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