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Acute Toxicity of Aqueous Extract of the Root of Telfairia occidentalis on Clarias gariepinus Fingerlings
Current Issue
Volume 4, 2016
Issue 1 (February)
Pages: 1-6   |   Vol. 4, No. 1, February 2016   |   Follow on         
Paper in PDF Downloads: 88   Since Mar. 6, 2016 Views: 934   Since Mar. 6, 2016
Authors
[1]
Agwu Ekenma Julia, Department of Zoology and Environmental Biology, Faculty of Biological Sciences, University of Nigeria, Nsukka, Nigeria.
[2]
Odo Greg Ejikeme, Department of Zoology and Environmental Biology, Faculty of Biological Sciences, University of Nigeria, Nsukka, Nigeria.
[3]
Uwagbae Micheal, Department of Animal and Environmental Biology, Faculty of Life Sciences, University of Benin, Benin City, Nigeria.
[4]
Onuawueke Cynthia Chioma, Department of Zoology and Environmental Biology, Faculty of Biological Sciences, University of Nigeria, Nsukka, Nigeria.
Abstract
Telfairia ocidentalis is a tropical vine whose leaf and seed are consumed as vegetable for their high nutritional content. This study investigated the acute toxicity of aqueous extract of the root of Telfairia occidentalis on fingerlings of Clarias gariepinus. T. occidentalis induced different behavioural responses on C. gariepinus fingerlings such as erratic swimming, loss of balance and discolouration. The overall LC50 of the aqueous extract was estimated at 95% confidence limit as 32.401mg/L toxicant concentration. The percentage mortality of C. garienpinus subjected to various concentrations of T. occidentalis root extract was time and concentration dependent. However, 100% mortality was observed in the group of fingerlings exposed to the highest concentration of 75 mg/L at the end of 72 hours when compared to other concentrations (25 mg/L, 50 mg/L). Haematological parameters (HB, PCV, RBC, and WBC) carried out showed that haemoglobinand packed cell volume levels estimated among the survived C. gariepinus did not differ significantly at (P > 0.05), whilered blood cells level decreased significantly (P< 0.05) with increased concentration. Significant increase (P<0.05) in the total white blood cells count of fingerlings treated with root of T. occidentalis was noted. Dissolved oxygen (DO), pH, temperature and water hardness values of thetreated water were within tolerable limits for fish culture.
Keywords
Telfairia occidentalis, Clarias gariepinus, Acute Toxicity, Aqueous Root Extract
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