The California Department of Fish and Wildlife (CDFW) announced today that fall-run Chinook salmon fry released for the first time from its Fall Creek Fish Hatchery in Siskiyou County are presumed to have succumbed to gas bubble disease in the Klamath River.
On Monday, Feb. 26, CDFW released approximately 830,000 fall-run Chinook salmon fry into Fall Creek, a tributary of the Klamath River above Iron Gate Dam. The fish were hatched at CDFW’s new, $35 million, state-of-the-art Fall Creek Fish Hatchery, which represents California’s long-term commitment to supporting and restoring both Chinook and coho salmon runs on an undammed Klamath River.
The salmon fry experienced a large mortality based on monitoring data downstream. Indications are the cause of mortality is gas bubble disease that likely occurred as the fry migrated though the Iron Gate Dam tunnel, old infrastructure that is targeted for removal along with the Iron Gate Dam itself later this year. Gas bubble disease results from environmental or physical trauma often associated with severe pressure change. Read more