Vast majority of 710,000 salmon and trout survive fires.
The vast majority of 710,000 salmon and trout — including the state fish, the golden trout — and 100,000 eggs at two state hatcheries survived this week’s wildfires in Sonoma and Napa counties, according to the state Department of Fish and Wildlife.
Silverado Fisheries Base, located in Napa along the Silverado Trail, lost power for 24 to 48 hours, leaving some 200,000 fish without fresh water, aeration or food after staff was evacuated Monday. But an official said Thursday that only “minimal losses” were incurred.
“One fishery worker went back in late Wednesday, escorted by game wardens,” said Peter Tira, a department spokesman. “Much to our surprise, the fish were doing well, the eggs doing well.”
Meanwhile, Warm Springs Hatchery, downstream of Lake Sonoma near Geyserville, remained fully functional as of Thursday, even as nearby areas were evacuated. Tira said there are 160,000 endangered coho salmon and 350,000 steelhead at the facility being grown for release into the Russian River.
“It’s a very important hatchery,” Tira said. “The folks are there right now, and it’s up and running.”
At Silverado, power was restored by Thursday, and Tira said workers were eager to return to their posts and take care of the fish they are raising, though they are under evacuation standby alerts.
The Silverado hatchery is home to about 200,000 golden trout. The goldens are very small at this point in the season, about 2 inches, Tira said, a critical stage of their lives as they are grown out over the winter to be stocked in high-elevation lakes.
Workers at the site also were cultivating 100,000 eggs, all the Chinook salmon and kokanee salmon to be hatched and grown in California for stocking at the states reservoirs. They won’t know the full extent of survival rates until the eggs start hatching.
“We’re told the eggs look pretty good,” Tira said. “There’ll be some loss, but to put this in perspective against the loss in the region, they’re happy with what they found.”
The facility also grows out rainbow trout for stocking at Bay Area lakes. The eggs for hatching had yet to arrive when the fires thundered through the valley, Tira said.
Tom Stienstra is The San Francisco Chronicle’s outdoors writer. Email: tstienstra@ sfchronicle.com Twitter: @SteinstraTom