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Juveniles and adults of Acanthopagrus arabicus were studied to compare the effect of different salt concentrations (1.5, 7.5, 15, 30 and 45 psu) at 6, 24, 48 and 96 h on activities of the enzymes creatine kinase (CK) in gills, lactate dehydrogenase (LDH) in plasma and alkaline phosphatase (ALP) in intestine. CK and LDH were found to exhibit superior activity in adults compared to juveniles. All enzymes...