Author: Phil Helsel

A large number of about 830,000 salmon fry released into Northern California’s Klamath River are believed to have died after they contracted gas bubble disease, state wildlife officials said Monday.The condition is caused by extreme changes in pressure. It happened as the fish passed through the Iron Gate Dam tunnel, the California Fish and Wildlife Department said.The tunnel and the dam of the same name will be removed later this year.The approximately 830,000 Chinook salmon fry are the first to be released from the Fall Creek Fish Hatchery, a $35 million project designed to support salmon populations in the Klamath…