【摘要】 在恒温 (2 0± 1)℃条件下研究了铜、汞、铅离子对东亚三角头涡虫 (Dugesiajaponica)的急性毒性作用 .结果为Cu2 + 、Hg2 + 和Pb2 + 对涡虫 2 4h半致死浓度 (LC50 )分别是 :1.5 6 3mgL-1、0 .70 4mgL-1和 188.16mgL-1;4 8h的LC50 分别是 :0 .888mgL-1、0 .6 6 6mgL-1和 171.5 7mgL-1;72h的LC50 分别是 :0 .786mgL-1、0 .6 6 2mgL-1和 14 0 .94mgL-1;96h的LC50 分别是 :0 .779mgL-1、0 .6 4 7mgL-1(Pb2 + 无此值 ) .试验结果表明 :这些重金属的作用应属于3种类型 ,涡虫作为重金属污染的指示生物基本可行 .图 2表 1参 18更多还原

【Abstract】 Dugesia japonica(planarian) was treated with Cu 2+, Hg 2+and Pb 2+solutions at (20±1) ℃. The acute toxicity of these heavy metal ions was determined by LC 50. The LC 50 of Cu 2+, Hg 2 +and Pb 2+ were 1.563 mg L -1, 0.704 mg L -1 and 188.16 mg L -1 after 24 h, 0.888 mg L -1, 0.666 mg L -1 and 171.57 mg L -1 after 48 h, 0.786 mg L -1, 0.662 mg L -1 and 140.94 mg L -1 after 72 h, and 0.779 mg L -1, 0.647 mg L -1 after 96 h, respectively. With the different dead forms of planarian, the results suggested that these kinds of ions be divided into three types, and planarian be used as a bioindicator for heavy metal pollution. Fig 2, Tab 1, Ref 18更多还原