Image from page 17 of “1994 Columbia River Basin Fish and Wildlife Program overview” (1994)
Title: 1994 Columbia River Basin Fish and Wildlife Program overview
Year: 1994 (1990s)
Authors: Northwest Power Planning Council (U. S. )
Subjects: Columbia River Basin Fish and Wildlife Program (U. S. ); Fishery management; Wildlife management
Publisher: Portland, Or. : Northwest Power Planning Council
Contributing Library: Montana State Library
Digitizing Sponsor: Montana State Library
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Basin. For Snake River summer chinook, the target is 20,000 adults. For fall chinook, the rebuilding target is 1,000 fish. These are ambi- tious but achievable targets if we begin to act now. The salmon life cycle Rebuilding salmon runs is a complex pro- cess because the salmon lead complex lives. They spawn in freshwater, but grow to matu- rity in the saltwater sea. They are carried hundreds of miles down streams and rivers by the early thaws and mountain runoff. They pass as many as nine major Columbia and Snake river dams on their downstream migra- tion. As adult fish in the ocean; they travel thou- sands of miles, pass through numerous jurisdictions and along the shores of two na- tions. They are the subject of intense fishing both at sea and in the lower Columbia. Finally, those that survive must push back up the rivers to spawn where they were hatched. o, ur strategy has measures for every stage of that journey. And we have structured those measures to help coordinate the effort, and en- sure monitoring and evaluation. We must be able to shift emphasis or direction as new in- formation becomes available. Increase salmon survival in the rivers Our strategy will improve fish survival at the dams on the Snake and Columbia rivers, as well as in tributaries. The plan speeds the mi- gration of juvenile fish to the ocean by accelerating the flow of water in the rivers. It calls for protective screens to divert migrating fish from turbines at the dams and from irriga- tion and other diversions of water. It calls for improved barging of juvenile fish past the dams. And it seeks to control predators that feed on young salmon. Some actions in our strategy can begin im- mediately. Other measures need additional study before they can begin. Immediate flow measures Dams changed the Columbia and Snake from fast-flowing rivers to a series of slow- moving reservoirs. Young salmon are on a biological time clock. To reach the ocean safely, they must complete their downstream journey quickly. Before the dams, they did. Our plan calls for many actions to improve the survival of salmon during their migration.
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