华贵栉孔扇贝稚贝盐度适应性的研究

通过室内实验研究了水温28.5～29.4℃、pH值7.6～8.1条件下,华贵栉孔扇贝Chlamys nobilis(Reeve)稚贝(壳高9.77±0.19mm)对不同盐度的适应性。结果表明:华贵栉孔扇贝稚贝适宜生存盐度为24.27~37.18,最适生存盐度为26.91~32.13,适宜生长盐度为24.56~37.09,最适生长盐度为26.91~29.52。在适宜生存盐度范围内,当盐度变化超出最适范围时,低盐端变化对相对成活率、壳高日增长率、体重日增长率影响比高盐端明显。

Study on Adaptability of Juveniles of Chlamys nobilis (Reeve)to Salinity

When the water temperature and pH ranged between 28.5 and 29.4℃ ,7.6 and 8.1 respectively, study of various salinities on the adaptability of juveniles (shell height 9.77±0.19mm) of Chlamys nobilis(Reeve) by adopting indoor experiments was investigated. Results showed that the suitable survival salinity was 24.27~37.18, the optimum survival salinity was 26.91~32.13;The suitable growth salinity was 24.56~37.09, the optimum growth salinity was 26.91~29.52. When the change in salinity was beyond optima, the varieties in low salinity had more significant influence than the ones in high salinity to relative survival rate, daily growth of shell height , daily growth of body weight between the suitable survival salinity.