Their home streams range from southern California to northern Alaska and from Siberia south to Hokkaido, Japan. So the gravel needs to be mostly free from silt and fine sand because the eggs that are waiting to hatch need plenty of oxygen. This is why it is important that people shouldn t walk in these areas, disturbing the bottom. Different species of salmon sort themselves by size of streams, size of gravel, the depth of the water, the flow of the water, and the times they return to their home streams to spawn. Seven species of salmon are found in Puget Sound waters.
Chinook are the favorite of most for eating.
Unfortunately, the populations of Chinook Salmon are far below what are believed to be their historic numbers. That is why Chinook were listed as a threatened species by the National Marine Fisheries Service under the Endangered Species Act in 1999. There are four reasons for the population loss. Habitat loss , 2. Harvest , 3.