本文研究结果表明：（1）水体中含Cu2+和zn2+的浓度越高，鱼中毒越深，鳃盖运动振幅的增大和频率的减小就越显著。（2）Cu2+/zn2+混合液对鳃盖运动的影响具明显的协同作用，它的致毒效应分别为单一因子的3~5倍。（3）毒性次序：5x10-6Cu2+/50x10-6zn2+＞2.5x10-6Cu2+/25x10-6zn2+＞5x10-6Cu2+＞50x10-6zn2+（V/V）。（4）频繁的咳嗽反应是zn2+中毒的主要症状，驱逐反射是Cu2+中毒的主要症状，两者均可作为单一和混合重金属离子污染的敏感生物学监测指标。The results From the study on the eFFects of Cu2+,Zn2+ or their mixed liquid on opercular movement of Fish are as Follows: (1) The higher the Cu2+ or Zn2+ concentration, the deeper the Fish was poisoned.It is quite obvious that the amplitude of opercular movement increased and decreased in Frequency.(2) Apparently there is synergism From the eFFects of Cu2+/Zn2+mixed solution on opercular movement.The toxic eFFicacy is 3-5 times than that of single ion.(3) The sequence of toxicity is 5 ×10-6Cu2+/50 ×10-6Zn2+>2.5 ×10-6Cu2+/25 × 10-6Zn2+>5 × 10-6Cu2+ >50 × 10-6Zn2+ (V/V).(4)Cough response is the main sympton of Zn2+,expulsion reFlex is the symptom of Cu2+.Both cough response and expulsion reFlex may be used as biological index of heavy metal pollution.福建省自然科学基
