四种重金属对泥鳅胚胎和仔鱼毒性的研究

The Study on the Toxicity of Four kinds of Heavy Metal to Misgurus anguillicaudatus Embryo and Juvenile Fish

本文研究了Ｈｇ、Ｃｕ、Ｐｂ和Ｚｎ四种重金属对泥鳅（Ｍｉｓｇｕｒｎｕａａｎｇｕｉｌｌｉｃａｕｄａｔｕｓ）胚胎发育和仔鱼成活的影响。结果表明：四种重金属对泥鳅胚胎毒性强弱顺序为Ｈｇ＞Ｃｕ＞Ｚｎ＞ｐｂ，对泥鳅仔鱼毒性强弱顺序为Ｃｕ＞Ｈｇ＞Ｚｎ＞Ｐｂ。泥鳅胚胎对这四种重金属的耐毒性强于仔鱼。并得出这四种重金属对泥鳅的２４小时半致死浓度（ＬＱ＿（５０）），对泥鳅仔鱼的２４小时和４８小时半致死浓度及安全浓度。

?The Present paper deals with Misgurnus anguillicaudatus embryo developmentand juvenile survive influenced by 4 kinds of heavy metal，Hg，Cu，Pb anb Zn. The exper-imental results make known the toxic intensity of the above heavy metal to Misgurnusanguillicaudatus embryo is Hg＞Cu＞Zn＞Pb，but to the juvenile fish is Cu＞Hg＞Zn＞pb． The resistance to the toxicity in the Misgurnus anguillicaudatus embryo is betterthan that in the juvenile fish．Based on the experiments，the present paper demonstratesthe semi－causing death concentration of the 4 heavy metals to the fish in 24 hours（LC_(50)），also indicates the semi-causimg death concentration aud savety concentra-tionto the juvenile fish in 24 and 48 hours.