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International Journal of Fisheries and Aquatic Studies
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(ICV-Poland) Impact Value: 76.37, Impact Factor: RJIF 5.69
E-ISSN: 2347-5129, P-ISSN: 2394-0506

International Journal of Fisheries and Aquatic Studies

2017, Vol. 5, Issue 5, Part B

Acute toxicity and heamatology of Clarias gariepinus (Burchell, 1822) Exposed to 2, 2-Dichlorovinyl Dimethyl Phosphate (Dichlorvos)


Author(s): Ezike CO

Abstract: Static bioassay experiment was conducted to ascertain the acute effect of 2, 2 - dichlorovinyl dimethyl phosphate (DDVP) also known as Dichlorvos an organophosphate pesticide at 0.60, 0.80, 1.0, 1.2 1.4 and 0.00 mgL-1 on African catfish, Clarias, gariepinus juveniles (mean weight 13.86±0.46g) after 96 hours. The effects were assessed by examining the haematological profile against the control. Exposure to Dichlorvos caused a significant dose dependent (P < 0.05) reduction in haematocrit (PCV) and Haemoglobin (Hb) values. There was also a significant decrease (P < 0.05) of RBC in 1.4 mgL-1 concentration. The WBC elevation was significantly dose dependent (P < 0.05) in all concentrations except 0.60 mgL-1. The inhibition of MCH and elevation MCHC were both non significant (P > 0.05) but the inhibition of MCV was significant between control and exposed group (P<0.05). The LC50 of dichlorvos for Clarias gariepinus was 0.93 mgL-1 while the upper and lower confidence limits gave 1.21 and 0.77 mgL-1 respectively. Safe concentration estimated gave 0.0093 mgL-1. Behavioural responses in the fish included erratic and uncoordinated swimming which were observed to be more pronounced as the concentration increased. The results of this study highlight the stress of freshwater fish exposed to uncontrollable discharge of insecticides in the aquatic environment.

Pages: 100-105  |  577 Views  25 Downloads

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How to cite this article:
Ezike CO. Acute toxicity and heamatology of Clarias gariepinus (Burchell, 1822) Exposed to 2, 2-Dichlorovinyl Dimethyl Phosphate (Dichlorvos). Int J Fish Aquat Stud 2017;5(5):100-105.
International Journal of Fisheries and Aquatic Studies