International Journal of Science and Technology

International Journal of Science and Technology>> Volume 7, Number 2, February 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.


Abstract

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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