摘要
研究了锐劲特对麦穗鱼 ( Pseudorasbora parva)脑 ACh E活性、敏感性、恢复的影响。结果表明 :分别以 0 .0 1 2 5、0 .0 2 5、0 .0 5、0 .1 mg/L锐劲特处理麦穗鱼 96 h后 ,ACh E活性均无显著变化 ,说明锐劲特不影响 ACh E活性 ;同样地 ,以上述浓度锐劲特预处理试鱼 4 8h,也不影响 ACh E对 5mg/L马拉硫磷敏感性 ;但与单独的 2 mg/L浓度的马拉硫磷相比 ,以不同浓度锐劲特与马拉硫磷混合物处理过的试鱼 ACh E恢复较慢 ,且 1 6 8h后 ,差异显著 ( P<0 .0 5) ,说明锐劲特影响被抑制 ACh E的恢复 ,但是影响程度与锐劲特浓度关系不明显。
The effect of fipronil on topmouth gudgeon ( Pseudorasbora parva ) brain AChE activ ity, sensitivity and recovery was studied. The results showed that under sublethal dosages ( 0.0125 , 0.025 , 0.05 and 0.1 mg/L respectively), AChE activity of treated fish had no significant change, which indicates that fipronil does not affect fish AChE activity. It also had no further effect on AChE sensitivity to malathion (5 mg/L), proved by the fish which were pretreated with fipronil at sublethal dosages (0.0125, 0.025 , 0.05 and 0.1 mg/L respectively) for 48 h . Compared with single 2 mg/L malathion treated fish, the mixture of 2 mg/L malathion and fipronil at different dosages treated fish AChE recovered a little slowlier and after 168 h, the difference was significant ( P <0.05). It suggests fipronil affects inhibited AChE recovery, but the relationship between the effect and fipronil concentration is not obvious. Interaction between pesticides on environmental organism fitness should be paid more attention.
出处
《西北农业学报》
CAS
CSCD
2001年第1期37-40,共4页
Acta Agriculturae Boreali-occidentalis Sinica
基金
Supported by Natural Science Foundation of Zhejiang Province[No.392 0 43]
