不同温度下锐劲特对受马拉硫磷抑制的麦穗鱼AChE活性恢复的影响

研究了１５～１７℃、２０～２２℃下，０．０１ｍｇ／Ｌ锐劲特对被１ｍｇ／Ｌ马拉硫磷抑制的麦穗鱼（Ｐｓｅｕｄｏｒａｓｂｏｒａ ｐａｒｖａ）脑乙酰胆碱酯酶（ＡＣｈＥ）活性恢复的影响。结果表明：在１５～１７℃，经４８ｈ抑制，ＡＣｈＥ被抑制了４０％，恢复１４４ｈ后，处理组与无锐劲特对照都恢复到了空白对照的８０％以上。在此温度下锐劲特对ＡＣｈＥ活性恢复的影响不明显；而在２０～２２℃下，经相同的处理时间，ＡＣｈＥ被抑制了７０％，恢复２４０ｈ后，处理组与无锐劲特对照都只恢复到了对照的７０％。其间于１４４、１９２ｈ，ＡＣｈＥ活性差异达显著水平（Ｐ〈０．０５），说明了在此温度下锐劲特对ＡＣｈＥ活性恢复的影响。文中还讨论了恢复研究的意义。

Effect of Fipronil on Malathion-inhibited Topmouth Gudgeon (Pseudorasbora parva) Brain AChE Recovery at Different Temperatures

Effect of 0.01 mg/L fipronil on 1 mg/L malathion-inhibited topmouth gudgeon (Pseudorasbora parva) acetylcholinesterase (AChE) recovery at 15～17 ℃ and 20～22 ℃ respectively was studied. AChE was inhibited by 40 percent in both treatment and control without fipronil after 48 h exposure and recovered to over 80 percent after 144 h recovery at 15～17 ℃. At this temperature, effect of fipronil on AChE recovery was not discernible. However, after same exposure period, AChE in both treatment and control without fipronil was inhibited by 70 percent and recovered only to 70 percent after 240 h at 20～22 ℃. The difference between treatment and control without fipronil was significant at 144 h and 192 h respectively(P<0.05), which indicated the effect of fipronil on AChE recovery at this temperature. The importance of recovery study was also discussed.