The Swedish angler and fishing association (Sportfiskarna) have been creating habitats migrating fish such as trout. They are created so that the river will be more suited for spawning and for juveniles to grow before they head out to sea again. This was implemented by addition of boulders, dead wood and the building of bypass channels so the fish are able to move in and out of the rivers. This took place on the Swedish west coast in Skeboån, Hallstavik; Moraån, Järna and Bränningeån, Södertälje.
Read more (in Swedish): Sportfiskarna river restoration