【摘要】 以三疣梭子蟹各期幼体为实验对象,以发育次日为实验起点,对其进行了亚硝酸氮的急性毒性实验。结果表明:亚硝酸盐对三疣梭子蟹Z1期幼体饥饿和饱食两种状态下72 h半致死浓(LC50)分别为为2.282mg/L和2.736 mg/L,Z2期幼体分别为9.955 mg/L和11.541mg/L,Z3期幼体分别为19.487mg/L和30.336mg/L,Z4期幼体分别为14.243 mg/L和15.568 mg/L,M期幼体分别为69.110 mg/L和126.020 mg/L;饥饿与饱食状态下72 h半致死浓度无显著差异;三疣梭子蟹育苗池亚硝酸盐含量应控制在0.228mg/L以下。最后就亚硝酸盐对三疣梭子蟹幼体的急性毒性效应和急性致毒机理进行了分析与探讨。更多还原

【Abstract】 Experimental crabs were chosen from the next day after each development stage.The result showed that: 72 h LC50 of NaNO2 was 2.282 mg/L and 2.736 mg/L respectively for Z1 of Portunus trituberculatus larvas in starvation and satiation,and 9.955 mg/L and 11.541 mg/L,19.487 mg/L and 30.336 mg/L,14.243 mg/L and 15.568 mg/L,69.110 mg/L and 126.020 mg/L respectively for Z2,Z3,Z4 and M of Portunus trituberculatus larvas;there was no remarkable diversity between the starvation group and satiation ones;the content of NaNO2 should be kept less than 0.228 mg/L in the breeding pond of Portunus trituberculatus larvas.Finally,the thesis discussed the acute toxic effects and reasons of NaNO2 on the juvenile of Portunus trituberculatus larvas.更多还原