Selected and peer-reviewed contributions from an international workshop up-to-date descriptions of research activities on the ecotoxicology and ecophysiology of fish. Topics covered come from a broad field of physiological ecological adaptations of fish to environmental stressors. Numerous subdisciplines of immediate concern to investigators are explored. They include - ecotoxicological test methods - biochemical, genetic and cytological biomarkers - alternative in vitro bioessays with fish cells - development of larvae - ethology - endocrinology The contributions integrate field and laboratory studies thus bridging the gap between toxicologists and physiologists in the laboratory and 'pure' ecologists.