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ARPN Journal of Science and Technology >> Volume 7, Issue 2, November 2017

ARPN 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 Babatunde, M.M
ISSN 2225-7217
On Pages 541-544
Volume No. 4
Issue No. 8
Issue Date September 01, 2014
Publishing Date September 01, 2014
Keywords Growth, O.niloticus, Galex, Acute toxicity, Sub lethal toxicity.



Abstract

Toxicity test of Oreochromis niloticus fingerlings of mean weight 5.50g at temperature of 24- C 26was 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 sub lethal 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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