Sportsmens Report
February 21, 2020
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Sportsman’s Report: Good news for salmon

By: Bill Hanson
January 3, 2020

There was some great news in 2019, a big, fat, healthy Chinook salmon was caught near Bodega Bay. The 7-year-old beauty was a fall-run fish from a stream in the Central Valley.

The occurrence of a 7-year-old Chinook salmon is an extremely unusual event in California waters. In examining over 240,000 tags over the last 38 years, California Department of Fish and Wildlife (CDFW) scientists have only confirmed two other 7-year-old Central Valley Chinook captured in California fisheries. This year’s finding was made by CDFW’s Ocean Salmon Project (OSP) as part of its annual ocean fishery monitoring and coded-wire tag (CWT) recovery efforts.

This fish was produced at the Coleman National Fish Hatchery on the upper Sacramento River, and is the offspring of adults that spawned in 2012. The normal lifespan of California Central Valley Chinook is between two and five years, with the majority of fish returning to spawn as 3-year-olds. Less than 10 percent of these fish return as 5-year-olds.

Each year, approximately 32 million fall-run Chinook salmon are produced at five hatcheries in the Central Valley. Since 1980, a portion of all hatchery fish are tagged with a CWT that is etched with a unique numeric code. Each salmon containing a CWT is also externally marked with a clipped adipose fin to allow for easy visual identification.

State and federal hatcheries have been tagging Central Valley Chinook since 1972, releasing relatively small groups of tagged fish (less than 1 million fish) early on, and transitioning to a more robust marking and tagging program in 2007. Today’s Constant Fractional Marking Program ensures that at least 25 percent of all hatchery Chinook, or roughly 10 million fish, are tagged each year.

During the ocean salmon season, OSP and California Recreational Fisheries Survey field crews sample salmon from all major ports in California north of Point Conception. Salmon heads are taken back to the CWT lab in, wait for it, Santa Rosa, where the CWTs are removed and processed. The CWT lab processes up to 30,000 heads a year. Now this really getting a ‘head’ of the salmon population.

OSP scientists use sampling data and CWT information to estimate California commercial and recreational ocean salmon landings and fishing effort and support sustainable ocean and inland salmon fisheries. The information is also used to determine the contribution rates of wild and hatchery salmon stocks to ocean salmon fisheries in California. In addition to supporting the management of California salmon stocks, CWT information sometimes helps to document unusual life histories, like that of this rare 7-year-old salmon. 

Many sportsmen chip their teeth about fishing and hunting regulations, bag limits, controls on method of take, etc., etc. Here is hard evidence of a hugely successful program that supports the fishery, both commercial and recreational. Many species of wild game are being monitored with adjustments made through regulations on take and season. In extreme cases, like the salmon, intervention programs include hatchery grown fish, tagged and released into the wild. One such facility is a short drive from home, the Warm Spring Hatchery at the base of the dam that created Lake Sonoma. Here you can watch adult salmon trapped in fish ladders as they follow the scent trail to the place of their birth. The self-guided tour takes visitors through every step of the hatchery process to the ‘growth pens’ where you can buy fish food, bring quarters, to sprinkle on the hungry juveniles. The hatchery has a museum with accurate representations of local wildlife and history. Visitor hours are 8 a.m. to 3 p.m. to visit the web site enter: Warm Springs Hatchery or you can call at: (707) 433-6325. A word of advice, there is little available to eat at the hatchery and a visit can easily pass mid-day. The facility is family friendly, right now is when the fish spawn, an excellent day trip. From Hwy. 101 north, take the Dry Creek exit, turn left, the hatchery is eleven beautiful miles away.


Bill Hanson is a Sonoma County native and a lifelong sportsman. He is the former president of the Sonoma County Mycological Association. Look for his column in The Community Voice each week.