1. Laboratory of Environmental Toxicology and Aquatic Ecology, Faculty of Bioscience Engineering, Department of Applied Ecology and Environmental Biology, Ghent University (UGent), Jozef Plateaustraat 22, B-9000 Gent, Belgium, Department of Environmental Science, Institute for Wetland and Water Research, Radboud University Nijmegen, P.O. Box 9010, 6500 GL Nijmegen, The Netherlands, Laboratory for Ecological Risk Assessment, National Institute of Public Health and the Environment (RIVM), P.O. Box 1, 3720 BA...