将不同浓度Cd2＋、Hg2＋、Pb2＋液分别灌注罗非鱼嗅觉器官，研究其对EOg反应的影响。结果表明，这3种离子对EOg反应均呈抑制效应，抑制作用的大小与金属离子的种类及浓度有关，Cd2＋、Hg2＋、Pb2＋有效IC50分别为33.91、67.73、191.44μg/l；毒性顺序为：Cd2＋＞Hg2＋＞Pb2＋。Solutions of Cd 2+ ,Hg 2+ and Pb 2+ with different concentrations were poured into olfactory organs of Tilapia sp.Their electro-olfactogram(EOG) responses to the 3 ions were recorded.The EOG responses declined during the fish's exposure to Cd 2+ ,Hg 2+ and Pb 2+ solutions.The inhibitory degree was relative to the kind of metal and its concentration.The effective IC 50 of the 3 kinds of ions were 33.9,67.73 and 191.44 μg /L, respectively.The sequence of toxicty was Cd 2+ >Hg 2+ >Pb 2+ .福建省自然科学基金;国家自然科学基
