氟他胺对萼花臂尾轮虫的毒性影响  

Toxic effects of flutamide on Brachionus calyciflorus

作　　者：吕林兰[1,2] 杨家新[3] 匡腾蛟[3] 黄金田[2] 董学兴[2] 

机构地区：[1]江苏省滩涂生物资源与环境保护重点建设实验室,江苏盐城224002 [2]盐城工学院化学与生物工程学院,江苏省沿海池塘养殖生态重点实验室,江苏盐城224051 [3]南京师范大学生命科学学院,南京210046

出　　处：《淡水渔业》2012年第4期63-65,90,共4页Freshwater Fisheries

基　　金：江苏省滩涂生物资源与环境保护重点建设实验室开放基金(JLCBE10003);2010年江苏省三项工程项目(PJ2010-59);盐城工学院2011年大学生实践创新项目

摘　　要：采用两天种群增长和生命表,研究了不同浓度氟他胺对萼花臂尾轮虫(Brachionus calyciflorus)的毒性影响。结果显示:轮虫种群增长率与氟他胺浓度对数负相关。氟他胺对萼花臂尾轮虫种群增长率的半效应浓度(EC50)、最低可见效应浓度(LOEC)和无可见效应浓度(NOEC)分别为4.31、3.17和1.59 mg/L。氟他胺对萼花臂尾轮虫的内禀增长率和世代时间有显著的影响(P<0.05);内禀增长率随氟他胺浓度升高而下降,其中1.59 mg/L和3.17 mg/L氟他胺浓度组内禀增长率分别比对照组降低了8.98%和17.95%(P<0.05),其无效应浓度为0.8 mg/L;而3.17 mg/L浓度组的世代时间显著延长(P<0.05)。实验结果表明内禀增长率是检测氟他胺对萼花臂尾轮虫毒性最敏感的指标。Toxic effects of flutamide to B. calyciflonls were investigated by using 2-d population growth and life-table tech- niques. The result showed that the relationship between flutamide logarithmic concentration and population growth rate （r） was linear negative correlation. The half-maximal effective concentration （ECs0）, lowest observed effect concentration （LOEC） and no-observed effect concentration （NOEC） of flutamide were 4. 31, 3.17 mg/L and 1.59 rag/L, respective- ly. The intrinsic rate of increase and generation time were significantly affected by flutamide （ P 〈 0. 05 ）. The intrinsic rate of increase of B. calyciflorus were significantly declined exposed to 1.59 mg/L and 3. 17 mg/L flutamide, and the NOEC was 0. 8 mg/L. Exposed to 3.17 mg/L flutamide, the generation time （T） of B. calyciflorus was significantly prolonged （P 〈 0. 05 ）. All of above, the intrinsic rate of increase of B. calyciflorus was the most sensitive index for flutamide.

关 键 词：萼花臂尾轮虫(Brachionus calyciflorus) 氟他胺 毒性 种群增长率 生命表 

分 类 号：X171.5[环境科学与工程—环境科学]