Science Spotlight

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Recent accomplishments of CDFW's scientific community


CDFW Biologists Confirm Green Sturgeon Spawn in Yuba River

Underwater photo of a green sturgeon swimming along rocky river bottom.
CDFW biologists have been taking a new approach to looking at reproduction in one of the oldest fish species in existence. Green sturgeon, which are listed as threatened under the Federal Endangered Species Act, are in effect a living fossil, having swam in both the fresh and ocean waters from California to Alaska for more than 200 million years.

Fisheries Biologists Showcase Delta Bass at International Sportsmen’s Expo

Man wearing blue and beige foul weather gear and orange life vest holding net with long pole leaning over boat railing on boat on water. Shipwreck in background.
Among the more popular attractions at the Sacramento International Sportsmen’s Expo each January is the Western Bass Aquarium Demo Tank.The 6,000-gallon aquarium displays dozens of trophy largemouth bass collected by CDFW biologists from the Sacramento-San Joaquin Delta.

Science Spotlight: CDFW’s Annual Egg Take Results in Big Haul on the Little Truckee River

Woman wearing brown beanie cap, black puffy vest, flannel shirt, and camo waders standing in streambed holding a salmon
Each October, conditions permitting, CDFW staff and volunteers from the California Inland Fisheries Foundation, Inc. and Kokanee Power descend on the Little Truckee River, just upstream from Stampede Reservoir near Truckee, and get to work on the annual Kokanee Egg Take.

Creating Habitat in a Drawn-Down Lake

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More than a decade ago, Southern California freshwater anglers were disappointed to see a tried-and-true fishing spot dramatically affected by an emergency lake drawdown. Due to seismic concerns with the Perris Dam, California Department of Water Resources (DWR) officials deemed it necessary to reduce the water level at Lake Perris near Riverside by several thousands of acre-feet.

Surveying the Sacramento River and Delta

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How CDFW uses a combination of scientific techniques to better understand fish populations and the general health of Northern California waterways. (video)