Foto de stock - 22 April 2022, Brandenburg, Angermünde/Ot Criewen: A Nabu employee places a young sturgeon in the water of the Oder River near the Stützkow lookout tower in the Lower Oder Valley National Park. The Nabu Center Blumberger Mühle, together with the Leibniz Institute of Freshwater Ecology and Inland Fisheries (IGB) and the pond management Blumberger Teiche, released about 500 young Baltic sturgeon into the Oder River. Sturgeon stocking in the border river has been taking place for fifteen years, and efforts to reintroduce sturgeon to rivers in Germany have been underway since 1996. Sturgeon are migratory fish, breeding in freshwater, migrating to the sea and returning upstream to the spawning grounds of their birth after reaching sexual maturity. In the pond management of the Nabu Center, parent animals are continuously raised for the colonization of the Oder River. Photo: Soeren Stache/dpa. - Angermünde/Ot Criewen/Brandenburg/Germany