Toxicity of Parkia biglobosa and Raphia vinifera extracts on Clarias gariepinus juveniles

Acute toxicity tests were carried out with aqueous and ethanolic extracts of two botanicals on Clarias gariepinus juveniles. 96-h LC50 values for Parkia biglobosa aqueous (AEPB) and ethanolic extracts (EEPB) were 2.8 and 2.4 ppm, respectively. While for Raphia vinifera aqueous (AERV) and ethanolic extracts (EERV), the values were 3.4 and 3.2 ppm, respectively. The resulting 96-h LC50 values showed that extracts of P. biglobosa were more potent than the extracts of R. vinifera and that EEPB was the most toxic. Histopathological changes in liver and gill of exposed fish showed subtle cellular damages like necrosis, lesions, oedema and hepatocytes. Key Words: Botanicals, toxicity, juveniles, Clarias gariepinus. African Journal of Biotechnology Vol.3(11) 2004: 627-63

Studies on the physico-chemical parameters of Omi water body of Ago-Iwoye, Nigeria

In Omi water body, the physico-chemical parameters such as dissolved oxygen ranged from 1.4 to 4.8 mg/L; pH, 6.7 to 7.2; temperature, 26.5 to 31.5°C; alkalinity, 24.2 to 25.4 ppm; conductivity, 23.0 to 28.3 Ohms/cm; turbidity 0.11 to 0.15 m; and free carbon dioxide from 3.5 to 4.5 mg/L. Dissolved oxygen, pH and water temperature serve as variables since the fluctuation of one affects the values of others. The investigation shows that Omi water is safe for drinking when purified

Effect of chronic exposure to water soluble fractions of forcados crude oil on the growth and development of african catfish (Clarias gariepinus) larvae

No Abstract.Global Journal of Pure and Applied Sciences Vol. 13 (2) 2007: pp. 179-18