2种有机磷农药联合胁迫下日本青鳉的逐级行为响应

采用水质安全在线生物预警系统(BEWs)记录行为强度数据,探讨了2种有机磷农药敌百虫和对硫磷联合胁迫下,不同暴露浓度、不同暴露时间日本青鳉的行为响应.在不同浓度比例的农药暴露中,20、10、5、1和0.1TU的暴露浓度下行为反应时间分别为:1.4、4.8、6.4、32.2和43.0h,并且每个浓度不同配比之间行为反应时间差异不明显.结果表明,在2种有机磷农药的暴露下,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,但每个浓度的不同配比之间的行为响应时间差异不明显,而且每个浓度2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,即2种作用机制相似的有机磷农药对日本青鳉的行为毒性是简单的相加作用.

Stepwise Behavioral Responses of the Japanese Medaka Under the Joint Stress of Two Organophosphorus Pesticides

In this study, stepwise behavioral responses of Japanese medaka (Oryzias latipes) under the joint stress of two organphosphorus pesticides (Trichlorfon and Parathion) were discussed. BEWs was used to record the data of behavior strength, to analyze behavioral response of Japanese medaka. The differences of the behavioral responses time in 20, 10, 5, 1and 0.1TU were: 1.4, 4.8, 6.4, 32.2 and 43.0 h separately, which were significant. And evident difference of the behavioral responses time was not detected in different proportions of the pesticides. The results suggested that the stepwise behavioral responses of Japanese medaka were affected by both chemical concentration and exposure time. But the stepwise behavioral responses in different proportions of two organphosphorus pesticides were almost the same as each other, and the evident difference of the behavioral responses time was not detected. It proved that the toxicity effects of the joint stress of two organphosphorus pesticides on the stepwise behavioral responses of Japanese medaka were simple additivity.