Until his retirement in late December 2008, Christian Blaise, D.Sc., was a senior research scientist at the Saint-Lawrence Centre, Environment Canada, Quebec Region, Montreal, where he headed the Aquatic Toxicology Unit (ATU), River Ecosystems Research Section. Currently an Emeritus research scientist in the same Centre, he is still actively engaged with Environment Canada colleagues in several research projects linked to water quality investigations. He continues to hold an adjunct professor status at UQAR-ISMER (Universite du Quebec a Rimouski, Institut des Sciences de la Mer de Rimouski) where he contributes to teaching and provides mentorship to (under)graduate students in the field of ecotoxicology. Jean-Francois Ferard, D.Sc., is a Professor at the University of Metz (Lorraine province of France), where he heads a research unit entitled "Laboratoire des Interactions Ecotoxicologie, Biodiversite, Ecosystems" (LIEBE), recognized by CNRS (Centre National de la Recherche Scientifique). He also managed an undergraduate school program dedicated to Environmental Engineering and promoted knowledge and use of ecotoxicity tests by organizing, until 2011, an annual course entitled "Ecotoxicity and Carcinogenicity Testing of Chemicals, Plant protection products, Biocides, Effluents, Sediments and Contaminated Soils " which provides a theoretical and practical view of numerous ecotoxicity tests to decision-makers, industrialists and consultants. His teaching duties involve fundamental and applied Ecotoxicology and Toxicology, Physiology and Physiotoxicology and other related disciplines.