- - Environmental Science Wednesday, February 26, 1997 Chinook Salmon Among the many kinds of fish harvested each year by commercial fisheries is the Oncorhynchus tshawytscha or Chinook salmon. The United States catches an averages of about three hundred million pounds of salmon each year. However some Chinook salmon have been recently listed as threatened. Man has been the main cause for the decline in Chinook salmon populations. The populations of Chinook salmon have declined for several reasons. …showed first 75 words of 602 total…

…showed last 75 words of 602 total…spawning habitat, by improving the general management. They would also like to develop alternative harvesting methods. The effects that man has had on the Chinook salmon and many other species of salmon is very severe, any are labeled as threatened. We can reduce the causes of their population decrease by reducing the amount of fish we catch annually, reducing pollution dumped into their habitats, and by developing ways for the fish to bypass the dams.