水産および畜産生産

抽象的な

The Monthly Variation in Physiochemical Parameters of Ebonyi River System

Nwabunike MO*

The study analyzed the monthly variation in physiochemical parameters of Ebonyi river system. The objectives of the study were to analyze the monthly physiochemical properties of Ebonyi river system and to make necessary recommendations for the general improvement of fish management in the study area. Stratified random sampling was carried out in each water body. The fishes were caught, identified, counted, graded, measured and weighed according to species. The species for chemical and histological analysis were taken immediately after weighing to the laboratory. Concentration of metals were studied in fish blood, liver and in the tissue lying between the lateral lines and the fins, since high concentrations of metals do not imply that the metal have a toxic effect (-). Toxicity of metals is mostly associated with vital physiological functions, such as enzyme activity, modifications in membrane, lipid composition and changes in tissue structures.