Abstract: Migratory fish species form an essential part of the ecological quality of surface waters. The strong human influence on many water bodies in Europe has had detrimental effects on populations of migratory fish species, which have declined or even disappeared in many cases. Measures to restore migration often have, until now, a strong ad hoc character. Therefore there is need for a profound, integrative scientific approach, leading to a framework for analysing migration and the design of effective measures. We will present an agenda for the exchange and integration of knowledge among scientists and experts and for the development of a research agenda aimed at generating new knowledge in the fields of 1) monitoring fish behaviour in real-life situations, using a range of well-known and high-tech techniques; 2) experimental approaches in which the effect of disturbing cues on behaviour and physiology of individual fishes is investigated, and 3) modelling the effects of mitigating measures on population dynamics.