Which creature has varieties called Chinook, Chum, Coho, Sockeye and Steelhead?
Elwha Dam the reservoirs and dams so that flow was relatively constant throughout the year. Natural flow patterns are known to promote the health of native species and to help eliminate non native species after dam removal. At its peak, the Elwha supported spawning runs of Chinook, Coho, Chum, Pink, and Sockeye Salmon as well as Steelhead, Cutthroat, and Bull Trout. The Chinook were known to reach sizes of 45 kg. Sockeye, Chinook, Chum, and Pink Salmon were all endangered in the Elwha. Leaving one or both of the dams in place, even with modern fish passage systems, would not result in
Sockeye salmon National Marine Fisheries Service. Other sockeye populations in the upper Columbia River and in Puget Sound are not listed under the Act. Sockeye is an exception to 2010's forecast resurgence of Oregonian fish stocks. Spring Chinook, summer steelhead, and Coho are forecast to increase by up to 100% over 2008 populations. The sockeye population peaked at over 200,000 in 2008 and were forecast to decline to just over 100,000 in 2010. As an early indication of the unexpectedly high sockeye run in 2010, on July 2, 2010, the United States Army Corps of Engineers reported over 300,000 sockeye had passed