3种常用水产消毒剂对菲牛蛭幼体的急性毒性作用

Effects of three aquatic sterilants on the acute toxicity of juvenile leech, Hirudinaria manillensis Lesson,1842

在常温静水条件下,探讨了3种常用水产消毒剂〔碘制剂(聚维酮碘制剂和氯制剂)对菲牛蛭幼体的急性毒性作用。试验用幼蛭的平均体重为0.21(±0.02)g。试验过程中水体pH值为7.2(±0.5),DO值为6.14(±1.38)mg/L,水温为21.14(±3.01)℃。结果表明,幼蛭对3种消毒剂的敏感性依次为:碘制剂>聚维酮碘制剂>氯制剂;其安全浓度(SC)大小依次为:氯制剂>聚维酮碘制剂>碘制剂,分别为0.009、0.003和0.002 mL/L。通过比较3种消毒剂认为,氯制剂和聚维酮碘制剂是幼蛭培育中较理想的消毒药物,但使用时要准确掌握用量。

In this experiment, the acute toxicity test of three aquatic sterilants on juvenile of the leech, Hirudinaria manillensis Lesson,1842 were carried out indoors. The average weight of juvenile leech was 0.21 （±0.02） g. The pH value was 7.2 （±0.5）, DO value was 6.14 （±1.38） mg/L and the water temperature was 21.14 （±3.01）℃. The results showed that the sensitivity of juvenile leeches to three aquatic sterilants above could be as follow： iodide preparation〉povidone iodide〉chlorine preparation, and the safety concentration （SC）： chlorine preparation〉povidone iodide〉iodide preparation, which was 0.009,0.003, and 0.002 mL/L respectively. In conclusion, chlorine preparation and povidone iodide were the optimal drugs in preventing and curing disease of juvenile leech of Hirudinaria manillensis Lesson,1842, but which would be used with reasonable dose.