Study of Some Liver Enzymes Changes (Lates calcarifer) at Different Levels of Water Salinity

Present study aimed to investigate salinity effects liver enzymes (AST, GOT and GPT) in Asian Sea bass (Lates calcarifer).

For this purpose, juvenile fish with an average weight of 34.36±0.41 g were evaluated for 30 days. After 14 days of adaptation, the experiment carried out with 4 treatments and 3 replicates including 15, 35 and 50 gram per liter and fresh water. 15 fish were randomly distributed in each of the 12 fiberglass 300-liter cylindrical tanks. Fish were fed with feed pellets two times daily. Water salinity was reduced up to 3 ppt daily. At the end of experiment, blood samples was collected.

The Alkaline phosphatase  and GOT measurements showed no significant differentiation in all treatment. Moreover, difference were observed between 15 ppt group and control.Overall, at the present study sea bass fish showed a good compatibility in response to different salinity levels after 30 days.

The obtained results indicated that this species could tolerate salinity changes up to brackish water and high salinity water.