Group photo of USGS staff and partners who participated in the Fish Passage Tour sponsored by the USGS Western Fisheries Research Center. Partners: NOAA Fisheries, the California Department of Fish and Wildlife, the California Department of Water Resources, the U.S. Forest Service, the U.S.
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Group photo of USGS staff and partners who participated in the Fish Passage Tour sponsored by the USGS Western Fisheries Research Center. Partners: NOAA Fisheries, the California Department of Fish and Wildlife, the California Department of Water Resources, the U.S. Forest Service, the U.S.
![Group of people standing on North Shore Collector in the forebay of Cowlitz Falls Dam](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/masonry/public/media/images/Toby%20Kock%20Fish%20Passage%20Tour.jpg?itok=xHNTniey)
Toby Kock (right, in plaid shirt) listens to a question during the Fish Passage Tour while standing on the North Shore Collector in the forebay of Cowlitz Falls Dam. The group discussed various ways that migrating juvenile salmon approach and pass the dam.
Toby Kock (right, in plaid shirt) listens to a question during the Fish Passage Tour while standing on the North Shore Collector in the forebay of Cowlitz Falls Dam. The group discussed various ways that migrating juvenile salmon approach and pass the dam.
![North Shore Collector separator at Cowlitz Falls Dam, WA](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/masonry/public/media/images/Viewing%20Fish%20Dewatering%20-%20Fish%20Passage%20Tour_0.jpg?itok=tB1gBW9l)
Participants of the Fish Passage Tour view the North Shore Collector separator at Cowlitz Falls Dam, WA. Fish are collected here to allow staff to count, determine species, and sample fish as they migrate downstream.
Participants of the Fish Passage Tour view the North Shore Collector separator at Cowlitz Falls Dam, WA. Fish are collected here to allow staff to count, determine species, and sample fish as they migrate downstream.
![View of the forebay of the North Fork Dam of the Clackamas River Dam Complex, OR](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/masonry/public/media/images/Forebay%20North%20Fork%20Dam%20-%20Clackamas%20River.jpg?itok=-ZW7kgqJ)
View of the forebay of the North Fork Dam of the Clackamas River Dam Complex, OR. An orange buoy system is seen on the right side of the image showing an exclusion net to prevent fish from getting behind the collector.
View of the forebay of the North Fork Dam of the Clackamas River Dam Complex, OR. An orange buoy system is seen on the right side of the image showing an exclusion net to prevent fish from getting behind the collector.
![Purse seine filled with Pacific herring in Prince William Sound Alaska](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/masonry/public/media/images/AK%20Research%20-%20%20AMackenzie%201.png?itok=B1vcc9zB)
Purse seine net filled with Pacific herring in Prince William Sound Alaska. The seine net is deployed off the research vessel R/V Solstice (owned and operated by Alaska Department of Fish and Game) during a joint collection effort with the USGS to sample fish for an annual disease survey in the sound. Collection of herring is rare during the daytime.
Purse seine net filled with Pacific herring in Prince William Sound Alaska. The seine net is deployed off the research vessel R/V Solstice (owned and operated by Alaska Department of Fish and Game) during a joint collection effort with the USGS to sample fish for an annual disease survey in the sound. Collection of herring is rare during the daytime.
U.S. Geological Survey, and Alaska Department of Fish and Game researchers perform disease sampling on herring collected from a purse seine in Prince William Sound Alaska. Sampling includes length, weight, sex, age, blood for VHSV antibodies and VEN slides, gills/kidney/spleen for VHSV, and hearts for Ichthyophonus.
U.S. Geological Survey, and Alaska Department of Fish and Game researchers perform disease sampling on herring collected from a purse seine in Prince William Sound Alaska. Sampling includes length, weight, sex, age, blood for VHSV antibodies and VEN slides, gills/kidney/spleen for VHSV, and hearts for Ichthyophonus.
![Large purse seine net being loaded onto research vessel](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/masonry/public/media/images/AK%20Research%20-%20AMackenzie%203.png?itok=9Cn5OdE5)
Large purse seine net being loaded onto the research vessel R/V Solstice (Cordova Alaska). This net is used to collect Pacific herring throughout Prince William Sound. The herring disease surveys are the beginning of the field season for Alaska Department of Fish & Game in Cordova AK.
Large purse seine net being loaded onto the research vessel R/V Solstice (Cordova Alaska). This net is used to collect Pacific herring throughout Prince William Sound. The herring disease surveys are the beginning of the field season for Alaska Department of Fish & Game in Cordova AK.
![Aerial photo of landscapes near Cordova Alaska](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/masonry/public/media/images/Alaska%20aerial%20-%20Paez%201.png?itok=ysqqJQG3)
Using an ultra-light plane, researchers are looking at the landscapes where herring spawn in Prince William Sound Alaska.
Using an ultra-light plane, researchers are looking at the landscapes where herring spawn in Prince William Sound Alaska.
![Aerial photo of landscapes near Cordova Alaska](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/masonry/public/media/images/Alaska%20aerial%20-%20Paez%202.png?itok=3I818HIw)
Using an ultra-light plane, researchers are looking at the landscapes where herring spawn in Prince William Sound Alaska.
Using an ultra-light plane, researchers are looking at the landscapes where herring spawn in Prince William Sound Alaska.
![Aerial photo of landscapes near Cordova Alaska](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/masonry/public/media/images/Alaska%20aerial%20-%20Paez%203.png?itok=ypON6ofq)
Using an ultra-light plane, researchers are looking at the landscapes where herring spawn in Prince William Sound Alaska.
Using an ultra-light plane, researchers are looking at the landscapes where herring spawn in Prince William Sound Alaska.
![Researchers processing fish samples in MMFS wet laboratory](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/masonry/public/media/images/MMFS%20wetlab%20work%201%20-%20GKurath.png?itok=LpvQ3D9F)
(Left to Right) Bill Batts, Joanna Salzer, and Dr. Jee Youn Hwang sample fish during a swim performance trial. Once fish have completed swim trials they are euthanized and kept fresh on ice. Sampling includes length and weight measurements, and collection of a small portion of tissues to confirm the presence of virus.
(Left to Right) Bill Batts, Joanna Salzer, and Dr. Jee Youn Hwang sample fish during a swim performance trial. Once fish have completed swim trials they are euthanized and kept fresh on ice. Sampling includes length and weight measurements, and collection of a small portion of tissues to confirm the presence of virus.
(Left to Right) Dr. David Paez, Joanna Salzer, Dr. Jee Youn Hwang and Bill Batts observe as Chinook salmon are conditioned in the swim flume prior to swim performance trials.
(Left to Right) Dr. David Paez, Joanna Salzer, Dr. Jee Youn Hwang and Bill Batts observe as Chinook salmon are conditioned in the swim flume prior to swim performance trials.
Chinook salmon orient into the water current of the swim flume during a performance trial.
Chinook salmon orient into the water current of the swim flume during a performance trial.
![Researcher preparing to sample fish from swim flume](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/masonry/public/media/images/Swim%20Flume%20image%206%20-%20GKurath.png?itok=i8Vxgb0l)
Dr. David Paez observes as Chinook salmon undergo a swim performance trial. Water velocity in the swim chamber is increased over a prescribed period to determine time of exhaustion for each individual fish. Virus-exposed and healthy control fish are swum together in a small group and must be watched carefully.
Dr. David Paez observes as Chinook salmon undergo a swim performance trial. Water velocity in the swim chamber is increased over a prescribed period to determine time of exhaustion for each individual fish. Virus-exposed and healthy control fish are swum together in a small group and must be watched carefully.
![Setting up underwater video cameras at low tide](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/masonry/public/media/images/SRubin%20setting%20up%20camera%20in%20Skagit%20R%20Delta%20-%20Marshal%20Hoy%20%281%29.jpg?itok=RlKrazai)
USGS scientist setting up underwater video cameras in a Skagit River Delta eelgrass meadow at low tide (Image 1)
linkUSGS scientist setting up underwater video cameras in an eelgrass meadow on the Skagit River Delta. Eelgrass grows in shallow marine and estuarine waters where it forms structurally complex habitats that support many other aquatic species by providing attachment substrate, food, refuge from predation, and nursery areas.
USGS scientist setting up underwater video cameras in a Skagit River Delta eelgrass meadow at low tide (Image 1)
linkUSGS scientist setting up underwater video cameras in an eelgrass meadow on the Skagit River Delta. Eelgrass grows in shallow marine and estuarine waters where it forms structurally complex habitats that support many other aquatic species by providing attachment substrate, food, refuge from predation, and nursery areas.
![Setting up underwater video cameras at low tide](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/masonry/public/media/images/SRubin%20setting%20up%20camera%20in%20Skagit%20R%20Delta%20-%20Marshal%20Hoy%20%282%29.jpg?itok=5XJq87FM)
USGS scientist setting up underwater video cameras in a Skagit River Delta eelgrass meadow at low tide (Image 2)
linkUSGS scientist setting up underwater video cameras in an eelgrass meadow on the Skagit River Delta. Eelgrass grows in shallow marine and estuarine waters where it forms structurally complex habitats that support many other aquatic species by providing attachment substrate, food, refuge from predation, and nursery areas.
USGS scientist setting up underwater video cameras in a Skagit River Delta eelgrass meadow at low tide (Image 2)
linkUSGS scientist setting up underwater video cameras in an eelgrass meadow on the Skagit River Delta. Eelgrass grows in shallow marine and estuarine waters where it forms structurally complex habitats that support many other aquatic species by providing attachment substrate, food, refuge from predation, and nursery areas.
Pacific Lamprey ammocoetes in a measurement tank. Tissues collected from the lamprey will be analyzed for mercury as part of a study on mercury contamination in the Columbia River Basin.
Pacific Lamprey ammocoetes in a measurement tank. Tissues collected from the lamprey will be analyzed for mercury as part of a study on mercury contamination in the Columbia River Basin.
![People in two lines waiting for fish release](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/masonry/public/media/images/Photo%201%20Reagan%20IMG_6101_0.jpg?itok=VGcF1ehW)
Waiting for multi-tribal ceremonial release of adult Chinook to the Spokane River during 2022 National American Fisheries Society Meeting
linkMulti-tribal ceremonial release of adult Chinook to the Spokane River during 2022 National American Fisheries Society Meeting. Here, people line up to participate in ceremonial multi-tribal fish release in the Spokane River.
Waiting for multi-tribal ceremonial release of adult Chinook to the Spokane River during 2022 National American Fisheries Society Meeting
linkMulti-tribal ceremonial release of adult Chinook to the Spokane River during 2022 National American Fisheries Society Meeting. Here, people line up to participate in ceremonial multi-tribal fish release in the Spokane River.
![Ian Jezorek hands off adult Chinook salmon in a bag during ceremonial fish release](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/masonry/public/media/images/Photo%202%20Rachel%20IMG_6105.jpg?itok=sCt4W0R4)
USGS fish biologist, Ian Jezorek, hands off adult Chinook salmon during ceremonial tribal fish release during 2022 National AFS Meeting
linkMulti-tribal ceremonial release of adult Chinook to the Spokane River during 2022 National American Fisheries Society Meeting. Here, fish biologist Ian Jezorek participates in ceremonial multi-tribal fish release in the Spokane River.
USGS fish biologist, Ian Jezorek, hands off adult Chinook salmon during ceremonial tribal fish release during 2022 National AFS Meeting
linkMulti-tribal ceremonial release of adult Chinook to the Spokane River during 2022 National American Fisheries Society Meeting. Here, fish biologist Ian Jezorek participates in ceremonial multi-tribal fish release in the Spokane River.
![Fish biologist releasing fish into river](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/masonry/public/media/images/Photo%203%20Reagan%20IMG_6164%20cropped.jpg?itok=7j8Eg7Ny)
Multi-tribal ceremonial release of adult Chinook to the Spokane River during 2022 National American Fisheries Society meeting. Here, fish biologist, Jill Hardiman, participates in the event by releasing an adult Chinook salmon into the Spokane River.
Multi-tribal ceremonial release of adult Chinook to the Spokane River during 2022 National American Fisheries Society meeting. Here, fish biologist, Jill Hardiman, participates in the event by releasing an adult Chinook salmon into the Spokane River.
![Overhead view of Spokane River and surrounding bushes and trees](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/masonry/public/media/images/Spokane%20River%20Rachel%20IMG_6183.jpg?itok=NFthCqC6)
Overhead view of the Spokane River, where adult Chinook salmon were released during a multi-tribal ceremonial fish release
linkOverhead view of the Spokane River, where adult Chinook salmon were released during a multi-tribal ceremonial fish release. During 2022 National American Fisheries Society, many scientists and citizens took part in a ceremonial fish release. Adult Chinook salmon are currently blocked by dams and unable travel upstream to their historic range.
Overhead view of the Spokane River, where adult Chinook salmon were released during a multi-tribal ceremonial fish release
linkOverhead view of the Spokane River, where adult Chinook salmon were released during a multi-tribal ceremonial fish release. During 2022 National American Fisheries Society, many scientists and citizens took part in a ceremonial fish release. Adult Chinook salmon are currently blocked by dams and unable travel upstream to their historic range.