International Journal of Science and Technology

International Journal of Science and Technology>> Volume 7, Number 9, September 2017

International Journal of Science and Technology

The Growth Response in Fingerlings Of Oreochromis niloticus in Chronic Toxicity Test to Galex (Methoxychlor)

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Author M.M. Babatunde
On Pages 130-133
Volume No. 4
Issue No. 7
Issue Date July 01, 2014
Publishing Date July 01, 2014
Keywords Growth, O.niloticus, Galex,Acute toxicity,Sublethal toxicity.


Toxicity test of Oreochromis niloticus fingerlings of mean weight 5.50g at temperature of 24- 26 C was carried out to evaluate effects of galex on growth of the test organisms. Some of the fingerlings having undergone acute toxicity test which gave a LC50 of 9.30mg/L and 95% confidence limit of 1.04 and sublethal toxicity being subjected to Toxicant concentrations of 0.00 (control), 0.39mg/L, 0.89mg/L and 1.57mg/L. Fish were fed to satiation once daily and test water constantly changed for health of fish. Water parameters were monitored constantly too. The control fish showed a significant increase in size (P < 0.05) which ranged from 6.75g at onset of test and 10.07 0.30 at the 8th week while fish exposed to different toxicant concentrations showed an insignificant growth pattern.

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