Bau Frédérique

French National Institute for Agriculture, Food, and Environment (INRAE) | INRAE · Department of Waters

Le projet CONSACRE a l’ambition d’analyser d’un point de vue global et local, la continuité écologique piscicole de l’axe Seine. L’objectif est de proposer des pistes d’actions, qui concernent d’une part les possibilités d’aménagements pour la préservation et la restauration des milieux naturels, et d’autre part l’amélioration de l’association des différents publics impliqués dans cette problématique. https://consacre.inrae.fr/

Obstacles in rivers are considered to be one of the main threats to diadromous fish. Improving knowledge about migration triggers and processes is crucial to assess and mitigate the impact of obstacles. In our project, we explore the interplay between individual internal state, environmental conditions, and resulting individual movements of tagged silver eels in the fragmented River Dronne (Western France). More generally, it confirms that the movement ecology framework is an appropriate approach to explore this interplay in many fish radiotracking experiments in rivers.

LIFE MIGRATOEBRE project is a best practices and a demonstration project for final stretches of major European Rivers, focused on long-term sustainable investments in Natura 2000 sites and on species and habitats targeted by Habitats Directive conservation, at local and regional levels. The project is based on the implementation of mitigation measures in relation to rivers hydromorphology improvement, especially on rivers ecological connectivity and fish passage issues associated by the Water Framework Directive and the European Eel Recovery Plan (Regulation 1100/2007). The main objectives of the LIFE MIGRATOEBRE project are the conservation of the endangered anadromous fish species (European sturgeon, European eel, twait shad and sea lamprey) and the restoration of the Ebre River ecological connectivity through the interconnection of natural areas included in the Natura 2000 network. The specific objectives of the project are: 1. Recover healthy and sustainable populations of migratory fish species -European sturgeon (Acipenser sturio), European eel (Anguilla anguilla), twaite shad (Alosa fallax) and sea lamprey (Petromizon marinus)- within 20-30 years in the lower Ebre river and delta. 2. Significantly improve the ecological connectivity of the lower Ebre river, adapting all the present obstacles of the final stretch (Xerta’s weir, Ascó’s weir and Flix dam) to allow fish migration (upstream and downstream); increasing more than tenfold the river spawning habitat availability for European sturgeon, twaite shad and sea lamprey, and the distribution (and growth) area for European eel. 3. Involve community and a net of nature managers, farmers, fishermen, anglers, water managers, electric companies, tourism stakeholders, regional and local authorities working together on migratory fish recovery and improved ecological management in the final stretch of the Ebre river, on long-term sustainable investments in Natura 2000 sites on conservation of species and habitats targeted by Habitats Directive. 4. Be an exemplary project at local scale, and progressivelly to integrally promote the improvement of the ecological connectivity at the Ebre river basin. I. e. In a second stept, at Riba-roja dam -to connect the lower Ebre with an important tributary, the Segre River- and Mequinença dam -to connect the lower Ebre with the middle Ebre basin-. And also to become a demonstration project by other principal Iberian –Guadalquivir, Guadiana, Miño- and some European Rivers as well. More information at: www.migratoebre.eu