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Spawn

The Chinook salmon (Oncorhynchus tshawytscha) is the largest and most valuable species of Pacific salmon. Its common name is derived from the Chinookan peoples. Between 37lb. and 97 lbs. these fish are native to the North Pacific Ocean and the river systems of western North America, ranging from California to Alaska, as well as Asian rivers ranging from northern Japan to the Palyavaam River in Arctic northeast Siberia. Chinook need clean healthy ocean habitats and productive estuarine environments to gain the energy and strength needed to travel back upstream, escape predators, and spawn before dying. Populations have disappeared from large areas where they once flourished, or shrunk by as much as 40 percent. In some of the Coast Ranges of California and Oregon, and in large areas in the Snake River and upper Columbia River drainage basins, their inland range has been cut off, mainly by dams and habitat alterations. In certain areas of California's Sacramento–San Joaquin River Delta, it was revealed that extremely low numbers of juvenile Chinook salmon (less than 1%) were surviving. The Chinook salmon has not been assessed for the IUCN Red List, but according to NOAA, the Chinook populations along the Pacific coast are declining rapidly from factors such as overfishing, loss of freshwater and estuarine habitat, hydropower development, poor ocean conditions, and hatchery practices. Their future is uncertain.

 

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Uploaded on November 19, 2024