氨氮和亚硝氮对不同发育阶段罗氏沼虾幼体的急性毒性研究  

Acute toxic effects of NH_3-N and NO_2-N on Macrobrachium rosenbergii Larva at different developmental stages

作　　者：陈佳毅[1] 孙龙生[1] 吴骏[1] 杨家威[1] 

机构地区：[1]扬州大学动物科学与技术学院,江苏扬州22500

出　　处：《水产养殖》2015年第10期1-6,共6页Journal of Aquaculture

基　　金：江苏省水产三新工程项目(Y2013-47)

摘　　要：本研究旨在探讨水体中氨氮(总氨氮,NH3-Nt;非离子氨,NH3-Nm)和亚硝氮(NO2-N)对不同发育阶段罗氏沼虾幼体的毒性。分别设置不同氨氮和亚硝氮浓度梯度,研究其对Z5、Z8、Z11期罗氏沼虾幼体96 h急性毒性效应。结果表明:氨氮(非离子氨)对Z5、Z8和Z11罗氏沼虾幼体的安全浓度分别为2.108(0.115)mg/L、2.747(0.151)mg/L和2.762(0.152)mg/L;亚硝氮对罗氏沼虾Z5、Z8和Z11的安全浓度分别为1.078 mg/L、1.238 mg/L和2.048 mg/L。建议在育苗生产过程中控制育苗水体非离子氨和亚硝氮浓度分别不高于0.10 mg/L和1.00 mg/L。This experiment was carried out to investigate the toxic effects of ammonia nitrogen total ammonia nitrogen（NH3-Nt）,non-ionic ammonia nitrogen（NH3-Nm）and nitrite nitrogen（NO2-N） on Macrobrachium rosenbergii larva at different developmental stages. Different gradient concentrations of either NH3-N or NO2-N were formulated to determine the 96 h acute toxicity effect on Z5,Z8,Z11 larva respectively. The results showed that the safe concentration（SC）of NH3-N（NH3-Nm）for Z5,Z8 and Z11were 2.108（0.115）mg/L,2.747（0.151）mg/L and 2.762（0.152）mg/L respectively,the SC of NO2-N for Z5,Z8 and Z11were 1.078 mg/L,1.238 mg/L and2.048 mg/L respectively. We can suggest from this experiment that the concentrations of NH3-Nmand NO2-N in larva-culturing water should be below 0.10 mg/L and 1.00 mg/L respectively during the postlarvae production process of giant fresh prawn,Macrobrachium rosenbergii.

关 键 词：罗氏沼虾 幼体 氨氮 亚硝氮 毒性作用 安全浓度 

分 类 号：S945.4[农业科学—水产养殖]