氯化钠和碱度对罗氏沼虾仔虾的毒性研究

Studies of Toxicity of NaCl andAlkalinity to Post-Larval M.rosenbergii

实验研究氯化钠、碱度对罗氏沼虾仔虾的急性毒性作用。用概率单位法求出了其氯化钠2 4、4 8、72、96 h的半致死浓度分别为 8.58、 5.32、 3.4 7、 2 .19g/ L;碱度的 2 4、4 8、72、96 h半致死浓度分别为 51.0 2、 37.0 7、 2 7.19、 2 1.54mmol/ L。对氯化钠和碱度混合作用的结果进行的方差分析表明 ,氯化钠和碱度对仔虾的死亡率影响显著 ,而两者的交互作用不显著。碱度 (AL K)与罗氏沼虾仔虾氯化钠 2 4、4 8h L C50 (S)关系式分别为 S=- 0 .12 78AL K+ 9.2 346 ,S=- 0 .0 715AL K +5.530 1。

The toxic effects of NaCl and alkalinity on postlarval M.rosenbergii are studied. The results show that the 24-, 48-, 72- and 96- hour LC 50 values are 8.58, 5.32, 3.47, and 2.19g/L for NaCl, and 51.02, 37.07, 27.19, and 21.54mmol/L for alkalinity, respectively. The mixing experiment leads, to the following results: Both NaCl and alkalinity have significant effects on mortality while the NaCl×alkalinity interaction is not significant (P<0.05). The relationship between alkalinity (ALK) and LC 50 values of NaCl(S) in 24- and 48-hour are S=-0.1278ALK+9.2346 and S=-0.0715ALK+5.5301.