浮选剂丁基黄原酸钠对草鱼早期发育阶段的毒性效应

THE TOXIC EFFECTS OF BUTYL SODIUM XANTHATE ON THE EARLY DEVELOPMENT OF GRASS CARP,CTENOPHARYNGODON INELLUS

丁基黄原酸钠是一种金属矿的浮选剂。作者研究了它对草鱼早期发育阶段（孵化、存活、生长、畸形等）的毒性效应。结果表明，丁基黄原酸钠对草鱼胚胎９６ｈ的半致死浓度为１７．８ｍｇ／Ｌ，致畸半效应浓度为８．８５ｍｇ／Ｌ，当浓度为２４ｍｇ／Ｌ时，其胚胎的孵化率仅为３８．８％，对生长有影响的浓度为５．６－１０．０ｍｇ／Ｌ，浓度在５．６ｍｇ／Ｌ就可诱发畸形。丁基黄原酸钠对草鱼胚胎具有强烈的致崎作用，崎形的主要症状为弯体和体表瘤状赘生物。

The common mineral floating agent, butyl xanthate has been studied with reg-ard to its toxic effects on the early development of grass carp, Ctenopharyngodon idellus. When exposed to lethal and sublethal concentrations of butyl xanthate,adv-erse responses were observed in hatching, surviving, growth and teratogeny of the embryos.The 96-hours median lethal concentration(LC_(50))for embryos was 17.8mg/l.The median teratogenic effective concentration(EC_(50))was 8.85mg/l. Teratogeny was induced at the concentration of 5.6mg/l.Furthermore,adverse effects on growth were observed at the concentration of 5.6-10mg/l.Hatchability was only 38.8% in 24mg/l.The butyl xanthate can therefore be considered being teretogenicto embryos of grass carp.Main teratological symptoms of the embryo were kyphosisand neoplasm on the body surface.