California biologists collect young spring-run Chinook salmon in Deer Creek, a tributary of the Sacramento River, on Oct. 10, 2023. (Peter Tira, California Department of Fish and Wildlife) The ...

Oct. 30 (UPI) --Traditionally, spring-run and fall-run Chinook salmon have been classified as two separate subspecies, or ecotypes, but new genetic analysis suggests the two groups are much more ...

Spawning season has begun for Feather River Hatchery’s threatened spring-run Chinook salmon, whose population is at a historic low.“What’s happening this year is the lowest number of spring-run fish ...

Spring-run Chinook salmon are also a preferred and primary food for Southern Resident orcas, which are themselves listed as endangered, having a population of only 73 individuals. Diminishing salmon ...