水质基准鱼类受试生物筛选

Screening of Native Fishes for Deriving Aquatic Life Criteria

  • 摘要: 敏感受试生物的筛选是水质基准研究的关键环节,鱼类是水质基准重要的保护对象,各国在水质基准制定中都要求利用鱼类毒性数据. 依据地理分布及毒性数据丰度,筛选出我国以鲤科鱼类为主的17种本土代表性鱼类. 参照美国水质基准数据筛选原则,从ECOTOX等数据库中搜集相关毒性数据,筛选出对本土代表性鱼类毒性最大的污染物,主要包括重金属、氯酚类、分子氨及农药等,并分析污染物的物种敏感度分布,依据累积概率对鱼类的物种敏感性(累积概率<15%)进行分类. 结果表明:有10种本土代表性鱼类对污染物敏感,包括鲤科的鲤鱼(其对氰戊菊酯、福美双敏感,对二者的累积概率分别为12.50%、14.29%,下同)、草鱼(三唑磷,9.09%)、鲢鱼(甲氰菊酯,12.50%)、鳙鱼(镉,7.14%;敌敌畏,13.63%)和鲫鱼(无机汞,11.76%),以及非鲤科的泥鳅(敌敌畏,9.09%)、黄颡鱼(敌敌畏,4.55%;氧化乐果,14.29%)、黄鳝(氯氰菊酯,8.33%)、鲻鱼(硫丹,8.33%;氰戊菊酯,6.25%)和鳜鱼(分子氨,9.09%). 上述物种可作为相应污染物水质基准研究的本土敏感受试鱼类.

     

    Abstract: Screening of sensitive test organisms plays a key role on deriving aquatic life criteria. Fish species is one of the important protection objects for the water quality criteria. The ecotoxicity data of fish are required for deriving water quality criteria in the guidelines of developed countries. In the present study, most of seventeen native representative fish species belonging to Cyprinidae were obtained based on their geographical distribution and quantity of the toxicity data. According to the data collecting principle of aquatic life criteria,the fish toxicity data were collected and screened from database of ECOTOX and published literatures. The list of most pollutants toxic to fish was obtained through species sensitivity analysis. The pollutants included pesticides, chlorphenols, heavy metals and ammonia. The species sensitivities of fish species were classified by the cumulative probability from the sensitivity distribution curves of the most toxic pollutants. Ten fishes of the seventeen species were selected to be the native test model organisms for deriving water quality criteria. The fishes included Cyprinus carpio (fenvalerate,12.50%; thiram, 14.29%), Ctenopharyngodon idellus (triazophos, 9.09%), Hypophthalmichthys molitrix (fenpropathrin, 12.50%), Aristichthys nobilis (cadmium, 7.14%; dichlorvos, 13.63%), Carassius auratus (inorganic mercury, 11.76%)belonging to Cyprinidae, and Misgurnus anguillicaudatus (dichlorvos, 9.09%), Pelteobagrus fulvidraco (dichlorvos, 4.55%; omethoate, 14.29%), Monopterus albus (cypermethrin, 8.33%), Mugilce phallus (endosulfan, 8.33%; fenvalerate, 6.25%) and Siniperca chuatsi (non-ionic ammonia, 9.09%) belonging to non-Cyprinidae. The screened species can be considered as the native sensitive fish species for development of aquatic life criteria of their corresponding pollutants.

     

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