内陆碳酸盐型盐碱水域移殖对虾的可能性试验

Possibility Test of Transplanting Prawn in Carbonate Saline-Alkali Waters

通过碱度对淡化南美白对虾幼虾的急性毒性试验和对虾在天然盐碱泡水域的生存能力观察,探讨内陆碳酸盐型盐碱水域移殖对虾的可能性。结果表明:碱度对淡化南美白对虾幼虾毒性作用的半有效浓度(EC50)为2.78 mmol/L,24,48,96 h的半致死浓度(LC50)分别为12.94,11.89,11.65 mmol/L,安全浓度(SC)为3.10 mmol/L。淡化南美白对虾幼虾和中国对虾成虾在天然盐碱泡水域可分别存活5.5 h和3 h。盐度不是内陆碳酸盐型盐碱水域移殖对虾的限制因素,高碱度、高pH、主要离子组成及其比例不适和水质类型差别则是不可逾越的障碍。

To understand the feasibility of transplanting prawn in carbonate saline-alkali waters, acute toxicity of the alkalinity to desahnation larval Penaeus vannamei was determined in wild by one-way toxicity test, and to survey the live ability of desalination larval P. vannamei and adult P. chinensis in natural sahne-alkali waters. The results showed that the median effect concentration（EC50）for 24 hours of the alkalinity was 2.78 mmol/L . The median lethal concentration（LC50） for 24, 48 and 96 hours of the alkalinity to desalination larval P. vannamei were 12.94, 11.89 and 11.65 mmol/L, respectively. The safe concentration（SC）was 3.10 mmol/L. Desalination larval P. vannamei and adult P. chinensis can live only about 5.5 and 3.0 hours in natural saline-alkali waters. The salinity was not the limiting factor on transplanting prawn in carbonate saline-alkali waters, high carbonate-alkalinity and pH, as well as the disequilibrium between the composition proportions of major water chemical ions and the differences in water quality type were all the insurmountable obstacles at the moment.