Hatcheries have increased the number of juveniles released into the Sacramento River from about 303,000 last year to more than 520,000 this year.
When Shasta Dam was built on the Sacramento River in the 1940s, the government also established Coleman National Fish Hatchery about 30 miles away on the tributary Battle Creek, aiming to make up for the loss of upstream habitat by raising fish for release.
The fish are placed into a bath with carbon-dioxide in the water, which enables the staff to handle them. Workers lift the salmon from the water in nets, check to see that they’re ready for spawning, and separate females from males.They club the fish and send them sliding down a metal chute. One worker hangs each female salmon from a hook, inserts a needle in its abdomen and sends air flowing to push out the eggs, which land in a colander.
At the base of Shasta Dam, a different sort of spawning operation at Livingston Stone National Fish Hatchery focuses on boosting the population of the endangered winter-run Chinook salmon.
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