Biologists have begun collecting California's spring-run Chinook salmon to raise them in captivity in an effort to prevent extinction.

California biologists collect young spring-run Chinook salmon in Deer Creek, a tributary of the Sacramento River, on Oct. 10, 2023. ... Biologists call this year’s sharp decline a “cohort collapse” ...

The number of adult spring-run chinook salmon (SRCS) that died before spawning is worse than the preliminary estimate by the CDFW in October 2021 that 14,500 out of 18,000 to 20,000 fish had ...

The Rufous hummingbirds migrate through California in the spring. These territorial hummingbirds leave Mexico in January and travel north to Canada or Alaska by around mid-May.

In drought years and when marine heat waves warm the Pacific Ocean, late-migrating juvenile spring-run Chinook salmon of California’s Central Valley are the ultimate survivors. They are among the few ...

On Thursday, the Pacific Fishery Management Council recommended closing the California and Oregon salmon ... fewer than 167,767 adult fall chinook salmon are expected to try to return to the ...

In California, it takes about 1.1 ... Yet a survey of young adult smelt in the Sacramento-San Joaquin River Delta last fall yielded just eight fish, ... In 2014 the fall-spring counts were 88 and 36.

Biologists call this year’s sharp decline a “cohort collapse” because so few threatened adult spring-run Chinook salmon returned to the small streams still accessible to them. Mill and Deer Creek — ...