riverine fish population and assemblage, fish assemblage and renewable resource, ecological and human risk assessment, assessing biotic integrity, Settore BIO/07 - ECOLOGIA, riverine fish population and assemblage;riverine fish fauna distribution; European fish fauna; assessing biotic integrity;fish assemblage and renewable resources; fish assemblage and pollution; trophic group assemblage; ecological and human risk assessment; riverine fish assemblage in temperate rivers, trophic group assemblage, riverine fish assemblage in temperate rivers, riverine fish fauna distribution, European fish fauna, fish assemblage and pollution