Behavioural Toxicity of a Combined Oilfield Chemicals on African Catfish (Clarias gariepinus) (Burchell 1822)

The toxicity of the combination xylene and diesel at a 50:50 ratio on African catfish (Clarias gariepinus) was investigated using static bioassay for 96hrs. No significant difference (P>0.05) observed in Physicochemical parameters experimental water after exposure 24 hours among different concentration gradients controlled unit. Although there an increased variation along gradient 96hours. behavioral responses test fish from 24-96 show normal control. C. gariepinus exposed to 25 ml/l 50 mg/l toxicant showed behavior 48 hours. Afterward, that were active stopped swimming remained while response sudden changes surrounding environment. Generally, higher concentrations such as 100 250 chemicals progressive hyperventilation abnormal like gulping air, erratic movement, very fast swimming, jumping, displaying vigorous jerky movement suffocation, loss reflex. A faster operculum tail beat also with Spiraling. significantly (P<0.05) increase per time compared control group fish. noticeable behavioural recorded chemical. An eco-friendly chemical is within acceptable limits recommended by WHO DPR should be used well stimulation cleaning sustainable biodiversity healthy aquatic