The document takes into account previous and current activities to restore fish migration and serves as a knowledge base for the design and construction of fish passes in the Danube River. It contains an overview of strategic documents in the field of fish pass construction, a description of river ecosystems and types of behaviour of migratory fish species, an overview of Danube ichthyocenoses, case studies for Gabčíkovo and a proposal for the way forward. Enabling fish migration in the Danube is a key aspect of the conservation and restoration of the environment and biodiversity, which includes endangered fish species, especially sturgeons.

The document was prepared by Water Research Institute experts together with PA4 team.

The document is available here