In order to protect the salmon, the governments of the United States, Canada, and Japan have all agreed to a treaty whereby each would leave untouched a certain amount, and catch only a certain amount. In the past few years there have already been signs of a resurgence of this resource.
美日加等國政府為鮭鱒的資源保護，互相訂定遵守公約，相約放流多少，才可捕撈多少，這幾年來資源已有復甦現象。