Chinook

The same species of Chinook salmon in the Klamath-Trinity basin return to the river each year in two groups: the fall-run and the spring-run. Spring-run Chinook in the Klamath River have drastically declined from historical levels, and are at much lower abundances than fall-run Chinook there. A key genetic difference between these two runs may determine how they are protected (and hopefully restored) under the Endangered Species Act. Read on to learn more!