Will We Ever Get Ahead of the Problems? (H. Regier). Aquatic Toxicology in Management of Marine Environmental Quality: Present Trends and Future Prospects (M. Waldichuk). Survival of Lake Charr (Salvelinus Namaycush) Embryos Under Pulse Exposure to Acidic Runoff Water (J. Gunn). Hematological Parameters and Parasite Load in Wild Fish with Elevated Radionuclide Levels (J. Bernstein & S. Swanson). Colorimetric Determination of Cyanide in Aquatic Systems (M. Mehra & A. Arseneau). Nafion Dialysis Procedure for Speciation of Metal Cations (C. Bourque & R. Guy). Metallothionein Messenger RNA: Potential Molecular Indicator of Metal Exposure (K. Chan, et al.). Avoidance Tests with a Plating Industrial Effluent (J. Hadjinicolau & L. Spraggs). Development of Multiresistance Patterns in the Bacterial Flora of Trout Following an Antibiotic Therapy (R. Leger & R. Lallier). Toxicity Testing of Sediments: Problems, Trends, and Solutions (M. Samoiloff). Role of Dissolved Oxygen in the Desorption of Mercury from Freshwater Sediment (J. Wang, et al.). Integrated Ecotoxicological Evaluation of Effluents from Dumpsites (R. Van Coillie, et al.). The Use of a Fugacity Model to Assess the Risk of Pesticides to the Aquatic Environment of Prince Edward Island (L. Burridge & K. Haya). Assessment of the Inorganic Bioaccumulation Potential of Aqueous Samples with Two Algal Bioassays (S. Bisson, et al.). Biodegradation of Petroleum in the Marine Environment and Its Enhancement (K. Lee & E. Levy). Pesticides in Forestry and Agriculture: Effects on Aquatic Habitats (D. Eidt, et al.). Index.