Author(s): George ADI and Uedeme-Naa B

Abstract: Selected electrolytes as Sodium ion (Na⁺), potassium ion(K⁺), calcium ion (Ca²⁺), chloride ion (Cl^-, hydrogen carbonate ion (HCO₃^-) in the gill, muscle, liver, kidney and blood plasma of Clarias gariepinus of mean weight of 246.30± 14.12g SD; mean length 16.15±1.40cm SD for juvenile and mean weight of 850.00± 10.22g SD; mean length 29.20± 7.12 cm SD for adult were compared after exposure to chronic levels of linear alkylbenzene sulfonate. Results from the study indicated that in both life stages detergent: raised the Na⁺, K⁺, HCO₃^- in the muscles and decreased that of Ca²⁺, and Cl^-; raised Ca²⁺, K⁺ and HCO₃^- in the gill; decreased HCO₃^- in the liver; raised K⁺ in the kidney; raised Cl^- in the blood plasma when compared with control. It was also observed that Na⁺ in juvenile fish was within the same range as control in all the organs except that of muscle whereas it fluctuated in adult fish with increase in concentration. In all the organs of juvenile fish, K⁺ and Ca²⁺ were raised except Ca²⁺ in muscle and decreased in all the organs of adult fish except K⁺ in gill, kidney and blood plasma when compared with control. Chloride ion (Cl^-) in the muscle, gill, liver and kidney of juvenile fish decreased significantly (P<0.05) when compared with control while that of adult fish was same as control. However, in blood plasma, Cl^- was raised above control in the two life stages and HCO₃^- fluctuated when compared with control.

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