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Sturgeons and other migratory fish species represent a historic, economic and natural heritage of the Danube River Basin and are indicators of the ecological status of aquatic ecosystems, especially of the functionality of ecological corridors. Their populations have suffered substantially from overfishing, pollution, habitat destruction and disruption of their migration routes. The need for their conservation is recognized at a high political and management level (EUSDR-PA 06, Biodiversity, DRBMP).

Vienna, 26 March 2013. The ICPDR has published a manual with practical advice for measures that aim to ensure fish migration at transverse structures such as dams and weirs.

Vienna, 4/5 September 2012. The ICPDR held a workshop on river and habitat continuity to support the ongoing developments in the implementation of the EU Water Framework Directive and related legislation in the Danube River Basin with regard to addressing river and habitat continuity.