General Principles Introduction, R.T. Di Giulio and D.E. Hinton Bioavailability of Chemical Contaminants in Aquatic Systems, R.J. Erickson, J.W. Nichols, P.M. Cook, and G.T. Ankley Toxicokinetics in Fishes, K.M. Kleinow, J.W. Nichols, W.L. Hayton, J.M. McKim, and M.G. Barron Biotransformation in Fishes, D. Schlenk, M. Celander, E.P. Gallagher, S. George, M. James, S.W. Kullman, P. van den Hurk, and K. Willett Receptor-Mediated Mechanisms of Toxicity, M.E. Hahn and E.V. Hestermann Reactive Oxygen Species and Oxidative Stress, R.T. Di Giulio and J.N. Meyer Key Target Systems and Organismal Effects Liver Toxicity, D.E. Hinton, H. Segner, D.W.T. Au, S.W. Kullman, and R.C. Hardman The Osmoregulatory System, S.E. Wendelaar Bonga and R.A.C. Lock Toxic Responses of the Fish Nervous System, S.P. Bradbury, R.W. Carlson, T.R. Henry, S. Padilla, and J. Cowden The Endocrine System, P. Thomas The Immune System of Fish: A Target Organ of Toxicity, E. Carlson and J.T. Zelikoff Chemical Carcinogenesis in Fishes, J.M. Rotchell, M.R. Miller, D.E. Hinton, R.T. Di Giulio, and G.K. Ostrander Toxicity Resistance, P.A. Van Veld and D.E. Nacci Methodologies and Applications Exposure Assessment and Modeling in the Aquatic Environment, D. Mackay and L. Milford Fish Toxicity Studies, G.M. Rand Biomarkers, D. Schlenk, R. Handy, S. Steinert, M.H. Depledge, and W. Benson Aquatic Ecosystems for Ecotoxicological Research: Considerations in Design Analysis for Fish, T.W. La Point, J.H. Kennedy, J.K. Stanley, and P. Balci Ecological Risk Assessment, D.R. Mount and T.R. Henry Case Studies Mining Impacts on Fish in the Clark Fork River, Montana: A Field Ecotoxicology Case Study, S.N. Luoma, J.N. Moore, A. Farag, T.H. Hillman, D.J. Cain, and M. Hornberger Toxicology of Synthetic Pyrethroid Insecticides in Fish: A Case Study, J.R. Coats Reproductive Impairment of Great Lakes Lake Trout by Dioxin-Like Chemicals, D.E. Tillitt, P.M. Cook, J.P. Giesy, W. Heideman, and R.E. Peterson The Effects of Polycyclic Aromatic Hydrocarbons in Fish from Puget Sound, Washington, L.L. Johnson, M.R. Arkoosh, C.F. Bravo, T.K. Collier, M.M. Krahn, J.P. Meador, M.S. Myers, W.L. Reichert, and J.E. Stein Effects of the Exxon Valdez Oil Spill on Pacific Herring in Prince William Sound, Alaska, G.D. Marty Case Study: Pulp and Paper Mill Impacts, M.G. Dubé, K.R. Munkittrick, and L.M. Hewitt Estrogenic Effects of Treated Sewage Effluent on Fish: Steroids and Surfactants in English Rivers, C.R. Tyler, E.J. Routledge, and R. van Aerle Index