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.

• 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。