Optimum Acclimation Rates from Salt to Freshwater for Juvenile Sea Bass Lates calcarifer Bloch

Abstract

The rapid acclimation of 19-30 day-old sea bass (Lates calcarifer) fingerlings from seawater (28 ppt salinity) to freshwater was investigated. Sea bass reared in seawater were gradually acclimatized to freshwater over O, 3, 6 and 8 hours. There was no significant difference (P <0.005) in survival between fish in the seawater control and those acclimated over 6 or 8 hours but fish placed directly into freshwater all died within 2 hours.