Acute toxicity of Hg2+ to 5 species of genus Anguilla elver

A 96-hour acute toxicity test was carried out to study the effect of Hg2+ on 5 species of Anguilla elver (Anguilla japonica, A.anguilla, A.bicolor pacifica, A.mormorata, A.rostrata). Result indicates that 24 h LC50 of Hg2+ isA.japonica（0.408 mgL-1） A.anguilla（0.179 mgL-1） A.rostrata（0.111 mgL-1） A.mormorata（0.052 mgL-1） A.bicolor pacifica（0.018 mgL-1）. However, 48 h, 72 h and 96 h LC50 of Hg2+ is A.japonicaA.rostrata A.anguillaA.bicolor pacificaA.mormorata. Generally, A.japonica and A.rostrata show better tolerance and Hg2+ should be restricted in aquatic water strictly.