International Research Journal of Public and Environmental Health
Vol.5 (5),pp. 62-71, June 2018
Available online at https://www.journalissues.org/IRJPEH/
Author(s) retain the copyright of this article. Author(s) agree that this article remain permanently open access under the terms of the Creative Commons Attribution License 4.0 International License.
Original Research Article
Effects of sub-lethal toxicity of chlorpyrifos and DDforce pesticides on haematological parameters of Clarias gariepinus
Bamidele Adewumi1*,Germaine Akinola Ogunwole1, Ebenezer Akingunsola1, Oluwatosin Christianah Falope1 and Abiodun Eniade2
1Department of Biology, Federal University of Technology Akure, Ondo State, Nigeria
2Department of Animal and Environmental Biology, Adekunle Ajasin University Akungba-Akoko, Ondo State, Nigeria.
*Corresponding Author Email: adewumibenjamin(at)gmail.com
The injudicious and unregulated discharge of agricultural chemicals especially pesticides into aquatic bodies have caused ecological problems to all classes of aquatic organisms including fish. In this study, an attempt was made in assessing the toxic effects of sublethal concentrations of chlorpyrifos and DDforce on the haematological parameters of Clarias gariepinus juveniles. The range-finding tests for chlorpyrifos (0.40, 0.55, 0.70 and 0.85mg/l) and DDforce (0.15, 0.20, 0.25 and 0.30mg/l) was carried-out to determine the concentrations of the test solution for the definitive test. The 96h LC50 value was found to be 0.30mg/l chlorpyrifos and 0.18mg/l DDforce. Thereafter, 1/10th, 1/50th and 1/100th of LC50 was taken and the experiment continued for four weeks (28 days). The blood sample was collected on days 14 and 28. Standard haematological procedures were adopted to evaluate the blood parameters. There were significant reduction (p<0.05) in packed cell volume (PCV), red blood cell (RBC), haemoglobin (Hb), lymphocytes and monocytes at days 14 and 28 while white blood cell (WBC), neutrophils and mean cell haemoglobin concentration (MCHC) values showed significant increase (P<0.05) at days 14 and 28. However, there were variations in mean values of mean cell volume (MCV) and mean cell haemoglobin (MCH) at days 14 and 28 respectively. Results obtained in this study suggest that exposure to low concentrations of chlorpyrifos and DDforce induced stress and altered the haematological parameters of Clarias gariepinus juveniles.
Key words: Acute toxicity, chronic toxicity, chlorpyrifos, C. gariepinus, DDforce, haematological parameters