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man with glasses in blue jacket with tree in background
Justin B. Greer
Justin B. Greer
Justin B. Greer

Justin Greer is a Computational Biologist at the Western Fisheries Research Center. He conducts research on the effects of environmental stressors on the health of aquatic populations. Current research focuses on the effects of stormwater pollutants on salmonid health and strategies to reduce toxic stormwater inputs.

Justin Greer is a Computational Biologist at the Western Fisheries Research Center. He conducts research on the effects of environmental stressors on the health of aquatic populations. Current research focuses on the effects of stormwater pollutants on salmonid health and strategies to reduce toxic stormwater inputs.

smiling girl with long hair with background of lake and mountains
Ellie Dalsky
Ellie Dalsky
Ellie Dalsky

This is a photo of Ellie Dalsky, a biological technician at the Western Fisheries Research Center.

This is a photo of Ellie Dalsky, a biological technician at the Western Fisheries Research Center.

Roadway contaminants that flow from storm drains
Rainfall mobilizes roadway contaminants that flow from storm drains into aquatic habitats.
Rainfall mobilizes roadway contaminants that flow from storm drains into aquatic habitats.
Rainfall mobilizes roadway contaminants that flow from storm drains into aquatic habitats.

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

smiling woman with brown hair feeding fish in wet lab tank
Dorothy M. Chase
Dorothy M. Chase
Dorothy M. Chase

Dorothy Chase began her career at Western Fisheries Research Center in the Fish Health section where her research focused on Bacterial Kidney Disease (BKD) in salmonids. She is now a part of the Ecology section, focusing on research that uses environmental DNA to detect and quantify fish species, fish pathogens and invasive aquatic species in environmental samples.

Dorothy Chase began her career at Western Fisheries Research Center in the Fish Health section where her research focused on Bacterial Kidney Disease (BKD) in salmonids. She is now a part of the Ecology section, focusing on research that uses environmental DNA to detect and quantify fish species, fish pathogens and invasive aquatic species in environmental samples.

man on boat with cloudy background
Jacob (Jake) Gregg
Jacob (Jake) Gregg
Jacob (Jake) Gregg

Jake Gregg manages the research aquaculture system at the Western Fisheries Research Center's Marrowstone Marine Field Station, which produces Specific Pathogen Free marine fish.

Jake Gregg manages the research aquaculture system at the Western Fisheries Research Center's Marrowstone Marine Field Station, which produces Specific Pathogen Free marine fish.

woman carrying rope and box with mountains in background
Randi M. Bowman
Randi M. Bowman
Randi M. Bowman

This is Randi M. Bowman, a fish biologist with the Western Fisheries Research Center

This is Randi M. Bowman, a fish biologist with the Western Fisheries Research Center

scientist collecting snails on boat near tall grasses with mountains in the distance
Scientist Collects Snails in Upper Klamath Lake, OR
Scientist Collects Snails in Upper Klamath Lake, OR
Scientist Collects Snails in Upper Klamath Lake, OR

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.

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.

parasite under microscope
Fish Pathogenic Cercariae from Snail Hosts
Fish Pathogenic Cercariae from Snail Hosts
Fish Pathogenic Cercariae from Snail Hosts

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 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.

room with racks of snail samples in bottles and glass containers
Screening Snails for Parasites in Klamath Falls, OR
Screening Snails for Parasites in Klamath Falls, OR
Screening Snails for Parasites in 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.

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.

Presentation on parasites in the Upper Klamath Lake on a screen with scientist presenting
Sarah Flores Presentation at the 2025 International Symposium on Fish Parasites
Sarah Flores Presentation at the 2025 International Symposium on Fish Parasites
Sarah Flores Presentation at the 2025 International Symposium on Fish Parasites

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.

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.

Woman wearing USGS T-shirt and hat and purple gloves tagging a fish for monitoring
Scientist Tagging Fish For Monitoring
Scientist Tagging Fish For Monitoring
Scientist Tagging Fish For Monitoring

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

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

Scenic outlook on River with fish trap for getting fish to tag with telemetry equipment
Shasta River Screw Trap and Fish Tagging Site
Shasta River Screw Trap and Fish Tagging Site
Shasta River Screw Trap and Fish Tagging Site

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.

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.

Man and women working in lab on laptops
Scientists Marking Juvenile Salmonids
Scientists Marking Juvenile Salmonids
Scientists Marking Juvenile Salmonids

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.

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.

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

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

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

lanscape photo of a river flowing through the mountains with trees on either side
Klamath River
Klamath River
Klamath River

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 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. 

Map of Missouri River Basin showing risk of Dreissenid Mussel infestation
Mussel Infestation Risk for the Missouri River Basin
Mussel Infestation Risk for the Missouri River Basin
Mussel Infestation Risk for the Missouri River Basin

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.

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.

Seattle storm drain in the rain with a sign that reads "Dump no waste, drains to sound" and a red car passing by
Seattle Storm Drain in the Rain
Seattle Storm Drain in the Rain
Seattle Storm Drain in the Rain

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 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.

street water drain to Puget Sound
Street Water Drain to Puget Sound
Street Water Drain to Puget Sound
Street Water Drain to Puget Sound

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

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

Man with navy blue sweater and cap next to scenic lake lookout with mountains in the distance
Ryan Byrne
Ryan Byrne
Ryan Byrne

This is a photograph of Ryan Byrne, a scientist at the Klamath Falls Field Station in Klamath Falls, OR. He is a part of the Western Fisheries Research Center.

This is a photograph of Ryan Byrne, a scientist at the Klamath Falls Field Station in Klamath Falls, OR. He is a part of the Western Fisheries Research Center.

This is a photo of Keno Dam in Klamath, OR, a concrete structure used to manage water distribution and flow.
Lower End of Fish Ladder at Keno Dam Looking Downstream
Lower End of Fish Ladder at Keno Dam Looking Downstream
Lower End of Fish Ladder at Keno Dam Looking Downstream

This is Keno Dam, in Klamath, OR. The Western Fisheries Research Center (WFRC) is doing work here to ensure proper fish passage is functioning and to provide science to help better address the water needs of the Klamath River Basin.

This is Keno Dam, in Klamath, OR. The Western Fisheries Research Center (WFRC) is doing work here to ensure proper fish passage is functioning and to provide science to help better address the water needs of the Klamath River Basin.

 Keno dam fish ladder; steps of water for fish to pass through
Fish Ladder at Keno Dam
Fish Ladder at Keno Dam
Fish Ladder at Keno Dam

The Western Fisheries Research Center (WFRC) is partnering with the U.S. Bureau of Reclamation to discuss ways to monitor fish passage at Keno Dam. With the recent removal of four mainstem dams along the Klamath River, Keno Dam now stands as the most downstream fish passage challenge , and the first major obstacle for migrating salmon returning upstream.

The Western Fisheries Research Center (WFRC) is partnering with the U.S. Bureau of Reclamation to discuss ways to monitor fish passage at Keno Dam. With the recent removal of four mainstem dams along the Klamath River, Keno Dam now stands as the most downstream fish passage challenge , and the first major obstacle for migrating salmon returning upstream.

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