摘要
将Ｃｕ２＋、Ｚｎ２＋溶液灌入嗅觉器官，研究不同浓度重金属对鱼类嗅电图（ＥＯＧ）反应的影响，结果如下：１）正常鱼体上ＤＬ－Ｍｅｔ剂量的ｌｏｇ值──ＥＯＧ反应间呈指数函数关系Ｒ＝２１．０（１ｏｌｏｇｃ／４．９３５）；２）Ｃｕ２＋、Ｚｎ２＋对１０－５ｍｏｌ／ＬＭｅｔ刺激产生的ＥＯＧ反应呈抑制效应，抑制的程度随金属浓度的增加而增加；３）Ｃｕ２＋的抑制效应大于Ｚｎ２＋，约为１０余倍，Ｃｕ２＋的有效ＩＣ５０为２２．３８μｇ／Ｌ，Ｚｎ２＋为３５４．８μｐｇ／Ｌ．
The effects of metal (Cu2+,Zn2+ )with different concentrations on the electro-olfactogram (EOG)response of fish (Tilapia sp. )are studied by perfusing CuSO4 and ZnSO4 solutions through the olfactory organs, and the differences are compared. The probable mechanism and real significance of the EOG as bioassay index are discussed. The results indicated that:1) the log value of DL-Methionine dose -the EOG response may be described as exponential function relationship in normal fish,R=21. 0 (10Log/4.935 ); 2 ) the EOG responses to 10-5 mol/L methionine stimulant in fish can be inhibited by Cu2+ and Zn2+,and the degree of inhibition is increased with increase in metal concentration; 3) the inhibited effect of copper is more 10 times than that of zinc;the effective IC50 for Cu2+ is 22. 38μg/L,and that for Zn2+ is 354. 81μg/L.
出处
《厦门大学学报（自然科学版）》
CAS
CSCD
北大核心
1996年第1期94-99,共6页
Journal of Xiamen University：Natural Science
基金
福建省自然科学基金
