温度与比重互作对施獭蛤稚贝成活与生长的影响

Combined effects of water temperature and gravity on survival and growth of juvenile Lutraria sieboldii

在室内条件下,采用2因素5水平的正交试验方法研究了温度（16.0℃、20.0℃、24.0℃、28.0℃和32.0℃）与海水比重（1.016 0、1.020 0、1.024 0、1.028 0和1.032 0）互作对施獭蛤（Lutraria sieboldii）稚贝成活与生长的影响。结果表明：1）在最适宜的比重范围内,稚贝的适宜成活温度是17.0~32.7℃,最适宜成活温度是24.0~28.0℃;适宜生长温度是16.4~32.7℃,最适宜生长温度是24.0~30.0℃;2）在最适宜温度范围内,稚贝适宜的成活比重是1.016 5~1.031 8,最适宜的成活比重是1.024 0;适宜生长比重是1.016 3~1.031 8,最适宜的生长比重是1.021 3~1.028 6;3）温度与比重对稚贝成活与生长存在联合效应,适宜和最适宜的温度、比重随着比重与温度向2个极端移动而逐渐变小。

We applied the orthogonal experiment method of two factors and five levels to study the combined effects of temperature （16.0 ℃, 20.0℃, 24.0 ℃, 28.0 ℃, 32.0 ℃） and gravity （1.0160, 1.0200, 1.0240, 1.0280, 1.0320） on survival and growth of juveniles in the laboratory. The results show that： 1 ） In the optimum gravity range, the suitable temperature range of juven- iles＇ survival was 17.0 -32. 7 ℃ ; the optimum temperature range of survival was 24. 0 -28.0 ℃ ; the suitable temperature range of growth was 16.4 - 32. 7 ℃ ; the optimum temperature range of growth was 24. 0 - 30. 0 ℃. 2） In the optimum temperature range, the suitable gravity range of juveniles＇ survival was 1. 016 5 - 1.031 8; the optimum gravity of survival was 1. 024 0; the suitable gravity range of growth was 1. 016 3 -1. 031 8; the optimum gravity range of growth was 1. 021 3 -1. 028 6. 3） There were combine effects between temperature and gravity. The suitable and optimum temperature as wall as gravity ranges of juveniles decreased gradually with gradient moving to the two ends.