Images

This is a photo from our scientists working with the Yakama Nation to remove smallmouth bass and other invasive salmon-eating predators. The work involves taking fin clips, scales, diet samples, and tagging and releasing larger fish. This fieldwork will continue through late May 2025. The crew shown in the photos are Ben, Becky, Jeff, and Chloe. 

California Department of Fish & Wildlife boat on Shasta Reservoir partnering with USGS Western Fisheries Research Center to conduct telemetry studies.

Mitchell Morse and Caitlin Stockwell drove down to Redding, CA to wrap up the Shasta Reservoir fish telemetry project. They worked with California Department of Fish and Wildlife partners to remove 16 submersible acoustic telemetry receivers within the reservoir, and 5 receivers installed on Shasta Dam.

This is Shasta Dam in California. Mitchell Morse and Caitlin Stockwell drove down to Redding, CA to wrap up the Shasta Reservoir fish telemetry project. They worked with California Department of Fish and Wildlife partners to remove 16 submersible acoustic telemetry receivers within the reservoir, and 5 receivers installed on Shasta Dam.

A photo of the McCloud arm looking upstream from one of the telemetry deployment sites.

Rainfall mobilizes roadway contaminants that flow from storm drains into aquatic habitats. Photo taken in the Pacific Northeast

Chris Pullano and Evan Hockett setting out early morning to reconfigure acoustic telemetry receivers on Upper Klamath Lake, Oregon. Receivers were deployed under ice cover all winter to understand winter movements and habitat use by endangered Lost River suckers.

Ramona Rapp is preparing the surgery station where adult Lost River suckers are surgically implanted with acoustic telemetry transmitters. This study is being conducted to understand seasonal survival and habitat use of Lost River suckers in Upper Klamath Lake.

Matt Sholtis, Brian Hayes, and Evan Hockett returning from a rough day on the water, where they retrieved acoustic telemetry receivers that were set under ice cover all winter to track winter movements of endangered Lost River suckers in Upper Klamath Lake, Oregon. 

Sarah Flores collecting snails from the marshes of Upper Klamath Lake. At the Western Fisheries Research Center, scientists are conducting research on parasites in Upper Klamath Lake, Klamath Falls, OR.

Local snail screening set up in Klamath Falls, OR at the Bureau of Reclamation facility. Five snails per tank on the right and cups with one snail on the left.

Sarah Flores presenting her lab's work at the 2025 International Symposium on Fish Parasites in Mérida Yucatán, Mexico. Sarah Flores works with the Western Fisheries Research Center in Seattle, WA to help suckers in the Upper Klamath Lake in Klamath Falls, OR.

This is a photo of fish pathogenic cercariae collected from intermediate snail hosts. The Western Fisheries Research Center (WFRC) is working to determine the extent of the effects of these parasitic organisms on suckers in Klamath Falls, OR. Top: Diplostomum gavium; Bottom: Bolbophorus sp.

This is a landscape photo of the Klamath River with mountains on either side of the photo. The Western Fisheries Research Center is researching the effects of flow management before and after dam removal on juvenile Chinook salmon survival to the ocean. 

This photo shows the California Department of Fish and Wilflife’s screw trap on the lower Shasta River, where Western Fisheries Research Center (WFRC) scientists surgically implant acoustic telemetry tags and passive integrated transponder tags into juvenil Chinook salmon collected at this site.

In this photo a USGS Biological Science Technician Brittany Graham is surgically implanting an acoustic telemetry tag into a juvenile salmon on the banks of the lower Shasta River. The Western Fisheries Research Center (WFRC) uses fish with acoustic transmitters to track fish movements and estimate survival. This information provides water managers with ro

This is a map of the United States outlining the different Fisheries Commissions and their geographic locations.

Collin Smith and Georgia Martin are inserting passive integrated transponders in juvenile Chinook Salmon at Fall Creek Hatchery, California to track their movements. Data are collected for each fish, including length, weight, and the individual number of the inserted tag.

Example of model results for the Missouri River Basin, illustrating that the risk of infestation is not equal across a watershed. This reinforces the value of using these risk assessment models in places like the Columbia River basin so monitoring, control and mitigation actions can be targeted.

This is an image of a stormwater drain in Seattle. Dangerous tire particles, such as 6PPD-quinone, can land up in water bodies through drains such as the one depicted above and can cause deaths in a variety of fish, including salmon.

This is a water drain that drains water from downtown Seattle to the Puget Sound.