Survival, growth and changes of gills of juvenile Chanos chanos under freshwater acclimation

We investigated the survival, growth and changesof gills of juvenile milkfish (Chanos chanos) under freshwater acclimation. At the end of the 30-day experiment, the survival rate, weight gain rate and specific growth rate were recorded; the gills of juveniles were observed and compared with those cultured under freshwater without acclimation and sea water. The highest survival rate (100%), weight gain rate (664.96113)% and specific growth rate (6.770.52)% of juveniles were obtained under freshwater acclimation. Large numbers of mitochondrion-rich cells were observed on branchial lamellae of juveniles in freshwater. It might be one of reasons for the high survival rate of juvenile C.chaos under condition of freshwater.