Fisheries,Guangdong Ocean University;
Tolerance of shrimp Fenneropenaeus merguiensis with body weight of(0. 024 ± 0. 085) g juveniles to salinity and temperature was studied by abrupt and gradual changes. Results showed that no significant difference in mortality was observed in the shrimp exposed to abrupt salinity change from 25 to 15,20,and 30 for 96 h(P 0. 05).The juveniles fed normally at gradual salinity change from 25 to 37 or 2,with survival rate of 77. 67% 25 and 80. 83% at salinity of 37 or 2. There was no significant difference in mortality in the juveniles exposed to abrupt temperature change from 29 ℃ to 24 ℃ and 34 ℃ for 96 h( P 0. 05). The juveniles fed normally when temperature was gradually changed from 29 to 17 ℃ or 36 ℃,with survival rate of 84. 17%. The findings indicated that the shrimp juveniles had poor ability of resistance to lower temperature,and was cultured at low salinity feasibly.