酚类及重金属对大鳞副泥鳅胚胎和鱼苗阶段的毒性研究

用酚?对硝基酚?铜?汞?锌等化学物在软水条件下对人工催产的大鳞副泥鳅的胚胎和鱼苗阶段进行毒性试验?鱼苗48hLC50值测定结果表明:除酚以外,其他4种化学物质的敏感性与别的鱼类相接近?这5种化学物质均表现为鱼苗阶段比鱼卵阶段更为敏感?以鱼苗存活时间为标准,这5种化学物质的NOEC及LOEC依次为:3.01～6.0,0.56～0.8,0.0041～0.0087,0.0975～0.0141,0.53～1.09mg/L?表明,泥鳅对酚类的敏感性与其他鱼类相似,但对重金属的敏感性则因金属种类的不同而不尽相同?使用这种材料的优点是只需要一尾母鱼就可以取得数量充足及受精良好的鱼卵,从而避免了SIS方法中要从多尾母鱼身上取卵造成实验上的差异。 

Toxicity of Phenols and Heavy Metals to the Embryo and Fry Stage of Loach (Paramisgurnus Dabraynus Sauvage)

Toxic effect of phenol, nitrophenol, copper, mercury and zinc on the embryo and larvae were determined with soft water. Expect phenol, the sensitivity of the other four chemicals between loach and other fishes are similar in acute toxicity. During the embryo-larvae toxicity test, larvae stage is more sensitive than embryo stage and the NOEC and LOEC for three five chemicals were: 3.01 ～6.0, 0.56～0.8, 0.0041～0.0087, 0.0975～0.0141, 0.53～1.09mg/L respectively. The sensitivity of phenols to loach was similar to other fishes in EL test but which was different among the three heavy metals. The advantage of loach as a test materiel is only one female can give abundant and fine quality eggs and can save the trouble of the inhomogenous eggs obtained from more than one female while the EL toxicity test is carried out with SIS Method.