10:15 LABORATORY AND FIELD VALIDATION OF AN IN SITU BIOASSAY BASED ON POST-EXPOSURE FEEDING RATE.
R.A. McWilliam and D.J. Baird. Institute of Aquaculture, University of Stirling, Stirling, Scotland, UK, FK9 4LA

10:30 THE USE OF THE BENTHIC CLADOCERAN CHYDORUS SPHAERICUS FOR TOXICITY TESTING.
G.D. Greve, T.L. Ter Laak, M. Boivin, and T. Reede. Department of Aquatic Ecology and Ecotoxicology, University of Amsterdam, Kruislaan 320, 1098 SM, Amsterdam, The Netherlands

10:45 THE IMPACT OF A MOSQUITO LARVICIDE ON NON-TARGET SALTMARSH INVERTEBRATES.
J.K. Culter. Center for Coastal and Tropical Ecology, Mote Marine Laboratory, 1600 Ken Thompson Parkway, Sarasota, Florida 34236

11:00 INSECTS IN POLLUTED RIVERS: AN EXPERIMENTAL ANALYSIS.
H. Van Der Geest, G.D. Greve, and M. Kraak. Department of Aquatic Ecology and Ecotoxicology, University of Amsterdam, Kruislaan 320, 1098SM Amsterdam, The Netherlands

11:15 BLACK GOLD OR TOXIC GOO? INFLUENCE OF NATURAL OIL SEEPAGE ON STREAM MACROINVERTEBRATE COMMUNITIES IN SOUTHWESTERN ONTARIO.
S.A. Geoghegan and R.H. Green. Department of Zoology, Ecology and Evolution Group, University of Western Ontario, Ontario, Canada N6B 5N7

11:30 DETERMINANTS OF HERBICIDE DISSIPATION IN GREAT PLAINS WETLANDS.
B. Friesen-Pankratz and L.G. Goldsborough. Department of Botany, University of Manitoba, Winnipeg, MB, Canada R3T 2N2