Effect of temperature and salinity on survival and growth of larval Crangon hakodatei (Decapoda: Crangonidae) reared in the laboratory

Abstract

Salinity and temperature are the most important physical factors influencing development of decapod crustaceans. Larvae of Crangon hakodatei were reared in the laboratory under three different temperatures (9, 12 and 15ºC) and 35 psu and three different salinities (25, 30 and 35 psu) and 9ºC to determine the effects of salinity and temperature on survival, growth and intermolt period. Larval survival reared at 9ºC was significantly higher than that reared at 12ºC and 15ºC and 35 psu. Larval survival reared at 25 psu was lowest which has no survival at second larval stage. Intermolt period of the larvae reared at 15ºC was significantly shorter than those of larvae reared at 9ºC and 12ºC. There was no significant difference on growth between different salinity and temperature conditions. Optimum survival rate of C. hakodatei larvae was obtained in 35 psu and 9ºC.