Osmotic concentration and tissue water of Penaeus chinensis juveniles reared at different salinity and temperature levels

Abstract

Penaeus chinensis juveniles were reared for 50 days at 16 combinations of salinity (10, 20, 30 and 40 ppt) and temperature levels (12, 18, 24 and 30 degrees C). All shrimps survived at 20 ppt and 18 degrees C, whereas no shrimp survived at 10 ppt and 12 degrees C after 30 days. Tissue water was inversely related to salinity at all temperatures tested. The isosmotic points computed from the linear relationship between hemolymph osmolality and medium osmolality were 736, 698, 674 and 667 mOsm/kg which are equivalent to 27.4, 26.1, 25.3 and 25.0 ppt at 12, 18, 24 and 30 degrees C, respectively. (C) 1998 Elsevier Science B.V. All rights reserved.