Environment, Vol. 2, Issue 1, Mar  2018, Pages 42-52; DOI: 10.31058/j.envi.2018.21003 10.31058/j.envi.2018.21003

Toxicity of Dakshtm Insecticide to Clarias Gariepinus Post Fingerlings

Environment, Vol. 2, Issue 1, Mar  2018, Pages 42-52.

DOI: 10.31058/j.envi.2018.21003

Dodeye, Eno. Omini 1* , Ekpo, Imaobong. Emmanuel 1 , Obot ofumbuk 1 , Ogar Patrick Ogar 2

1 Department of Fisheries and Aquatic Environmental Management, Faculty of Agriculture, University of Uyo, Uyo, Nigeria

2 Department of Agricultural Economics and Extension, Faculty of Agriculture, University of Calabar, Calabar, Nigeria

Received: 22 December 2017; Accepted: 24 January 2018; Published: 21 March 2018

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The study was carried out to investigate the toxicity of daksh insecticide on the African catfish C. gariepinus post fingerlings using a 96 hour static bioassay. The experiment was carried out under laboratory conditions with 360 post fingerlings of the test fish species distributed randomly in triplicate concentrations. The test fishes were treated with concentrations of 0.003, 0.004, 0.005, 0.006 and 0.007mg/l of daksh insecticide. The 96 hour LC50 was determined for Log toxicant concentration after 24, 48, 72 and 96 hour exposure. The 96 hour LC50 was 0.0028mg/l with a 95% confidence limits of between 3.4 – 7.69. The maximum safe concentrations were 2.8-04 – 2.8-05 for C. gariepinus exposed to daksh insecticide. The result also showed that there were significant differences (P < 0.05) in the water quality parameters as the concentration of the toxicant increased, also, variations in the 24 and 96 h-LC50 showed a significant difference (p


Toxicity, Daksh, Insecticide, Clarias Gariepinus, Post Fingerlings


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