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The U3E experimentation unit offers tools and scientific skills for research on lentic and lotic aquatic environments:

• The Rennes – Le Rheu aquatic experimentation facility (PEARL), part of the AnaEE-F infrastructure. It includes:
  • an experimention complex with tanks, greenhouses, indoor facilities and an array of mesocosms, at the Rennes agricultural science campus
  • a pond array at Le Rheu near Rennes
• Three river monitoring sites with migratory fish monitoring stations. These are on the Oir, a tributary of the Sélune in the Manche département, the Scorff, a coastal river in the Morbihan département, and the Bresle in Seine-Maritime.

U3E also provides cross-cutting services that cover all these sites: a water quality monitoring service, information systems and a biological samples collecting service.