Aquaculture

The toxicity of hair dressing salon effluent on Clarias gariepinus juveniles was studied using static bioassay method. This study investigated haematological, histopathological and biochemical changes in Clarias gariepinus juveniles. The fish samples were distributed randomly into T1 (800 ml/L), T2 (600 ml/L), T3 (400 ml/L), T4 (200 ml/L), and T5 control (water alone). All samples were studied in three replicates, in a completely randomized experiment. Mortality increased with  increased effluent concentrations; 250.96 ml/L was recorded as LC50 for 96 h.

In most cities in Nigeria, Industrial and Domestic effluents are discharged indiscriminately into the environment. In city slums, the usual practice is for people to live side by side with the waste they produce (both liquid and soilid waste) thereby leaving them at the mercy of diseases. In highbrow areas of cities, wastes may be properly drained but channeled into streams, rivers and lakes with the resultant damage to aquatic flora and fauna. Industrial effluents are usually of channeled into water bodies and the cost in terms of fish kills is enormous.