Effect of temperature on growth and survival of juvenile Lutraria sieboldii

We studied the effect of temperature on the survival and growth of juvenile Lutraria sieboldii [average shell height:( 2. 89± 0. 32) mm,average shell length:( 1. 77 ± 0. 21) mm] at salinity of 29. 0 and temperature of 8 ~ 34 ℃. The results reveal that the suitable temperatures for survival and growth of juveniles were 16. 3 ~ 31. 5℃ and 18. 5 ~ 31. 8 ℃,respectively; the optimum temperatures for survival and growth were 25 ~ 28 ℃ and 25 ~ 30 ℃,respectively. The optimum temperatures for survival and growth bent towards high-temperature side obviously. The survival and daily growth rate of juveniles' shell length and height showed a decreasing trend and high-temperature side decreased more significantly than low-temperature side. On low-temperature side, the daily growth of shell length was slower than that of shell height; however,the former exceeded the latter within the optimum temperature range of 25 ~ 28 ℃,which was contrary to the aforementioned trend,but was unobvious on high-temperature side.