Science Spotlight

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Recent accomplishments of CDFW's scientific community


Junction Reservoir Back to Raising Backcountry Trout

Concrete structure in stream with slatted metal gates and chutes. Man wearing camo waders, beige long sleeved shirt, gray call cap and black rubber gloves standing behind gate holding hammer.
Junction Reservoir in Mono County is CDFW’s brood lake for the Kamloops rainbow trout, a hard-fighting strain originally from the Kamloops region of British Columbia.

Iron Gate Hatchery

Short-haired woman in yellow rain jacket and black gloves holding fish on side of metal basin along side man in yellow rain jacket, black gloves, and camo hat holding fish over metal basin as dark orange liquid streams out of fish into metal basin.
At Iron Gate Hatchery in Hornbrook, the fall 2018 spawning operation has just concluded. Iron Gate spawns both Fall-Run Chinook Salmon and Coho Salmon from the Klamath River. For Chinook, the hatchery staff manually collect the eggs and mix it with the milt immediately after the fish come into the facility.

Stacking the Odds to Stock California’s Waters

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The beginning of trout fishing season in Southern California is just around the corner, and CDFW biologists and hatchery staff are striving to maximize hatchery trout availability for the many anglers who will cast lines in coming weeks. Trout angling in lower-elevation waters of Southern California generally begins in November and continues through April, to correspond with colder water temperatures that can sustain stocked trout.

New Heritage Trout Production Program for Inland Fisheries

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For more than a century, CDFW’s Trout Hatchery and Stocking Program has been providing recreational fishing opportunities to anglers throughout California. Today, the trout hatchery program is composed of 13 hatcheries, which oversee 20 distinct fish production programs to produce 17 strains, species and subspecies of trout.

The Long Journey of Heenan Lake’s Lahontan Cutthroat Trout

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For generations, anglers in California’s eastern Sierra Nevada mountains fished for one of the most cherished fish in the west, the Lahontan cutthroat trout (LCT). These native beauties are prized for their size, with some growing as large as 40 pounds in the Tahoe Basin.

CDFW Implants Transponders into Spring-Run Chinook

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On Thursday, May 18, fisheries biologists implanted acoustic transponders into 60 endangered adult spring-run Chinook salmon. The transponders will track their movements and help determine spawning success later this season. The salmon will be released to spawn naturally in the San Joaquin River near Friant over the next three months.