Temporal and spatial bioassessment of ecological risk of Amazonian Itchyofauna associated to Hg exposure Z.C. Castilhos, N. Almonsy, P.S. Souto, L.C.C. Pereira da Silva et E.D. Bidone J. Phys. IV France, 107 (2003) 267-270 DOI: 10.1051/jp4:20030293