2种除草剂联合胁迫下日本青鳉的逐级行为响应(The Stepwise Behavioral Responses of the Japanese Medaka under the Joint Stress of Two Herbicides)

探讨了日本青鳉在两种除草剂阿特拉津和百草枯联合暴露下的逐级行为响应,采用水质安全在线生物预警系统(BEWs)记录行为强度数据,分析不同暴露浓度、不同暴露时间日本青鳉的行为响应.10、5、1和0.1TU的暴露浓度下行为反应时间分别为:0.74、7.7、29.4和42.2h,而每个浓度不同配比之间行为反应时间差异明显.结果表明:在两种除草剂的暴露下,日本青鳉的逐级行为响应既受化合物浓度高低的影响,又受暴露时间的影响,而且每个浓度两种药物不同配比暴露下的青鳉鱼的逐级行为响应基本一致,每个浓度不同配比之间行为反应时间差异明显,即两种作用机制不同的除草剂对日本青鳉的行为毒性是协同作用.

The Stepwise Behavioral Responses of the Japanese Medaka under the Joint Stress of Two Herbicides

In this study,the stepwise behavioral responses of the Japanese medaka(Oryzias latipes)under the joint stress of two herbicides(Atrazine and Paraquat)were discussed.BEWs was used to record the data of behavior strength to analyze the behavioral responses of Japanese medaka.The evident difference of the behavioral responses time were:0.74、 7.7、29.4 and 42.2h,and evident difference of the behavioral responses time was detected.The results suggested that the stepwise behavioral responses of the Japanese medaka were affected by both the chemical concentration and exposure time.And the evident difference of the behavioral response time was detected.The stepwise behavioral responses in different proportion of the two herbicides were almost the same as each other.It proved that the toxicity effects of the joint stress of the two herbicides on the stepwise behavioral responses of Japanese medaka were synergistic.