Survival of Red Drum Fingerlings In Fresh Water: Dissolved Solids And Thermal Minima
Laboratory bioassays were conducted to estimate lower dissolved solids and temperature thresholds of red drum (Sciaenops ocellatus) fingerlings. Tolerance to low total dissolved solids (TDS) was measured by subjecting fingerlings to various test concentrations for 240 hours at 21° ± 1°C. Higher mortality in fresh water than in diluted sea water with similar TDS suggested that concentration of individual ions may be more important than TDS to survival of red drum in fresh water. Survival in solutions of increasing sodium chloride concentrations, but constant TDS, increased and was greater...
