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Theresa "Marty" Liedtke (Former Employee)

Science and Products

Pacific sand lance

Contaminants in Puget Sound Forage Fishes and Impacts to the Marine Food Web

Toxic chemical pollutants have been released into Puget Sound for decades by human activities. There’s a wide range of contaminants, from persistent compounds like polychlorinated biphenyls (PCBs) and flame retardants to contaminants of emerging concern. Aquatic species can be exposed to and accumulate contaminants, causing disease or disruption of biological processes like growth or reproduction...
By
Ecosystems Mission Area, Western Fisheries Research Center, Columbia River Research Laboratory (CRRL)
Contaminants in Puget Sound Forage Fishes and Impacts to the Marine Food Web

Contaminants in Puget Sound Forage Fishes and Impacts to the Marine Food Web

Toxic chemical pollutants have been released into Puget Sound for decades by human activities. There’s a wide range of contaminants, from persistent compounds like polychlorinated biphenyls (PCBs) and flame retardants to contaminants of emerging concern. Aquatic species can be exposed to and accumulate contaminants, causing disease or disruption of biological processes like growth or reproduction...
Learn More

Evaluating injury and mortality to larval lamprey collected out of sediment using a portable suction dredge Evaluating injury and mortality to larval lamprey collected out of sediment using a portable suction dredge

Dataset describes the findings of a combination of field and laboratory tests to see if larval lamprey were injured or killed after they were collected from their burrows in sediment using a portable suction dredge.
By
Ecosystems Mission Area, Species Management Research Program, Western Fisheries Research Center, Columbia River Research Laboratory (CRRL)

Counts, Fish Weights, and Spectral Data from a Juvenile Chinook Salmon Polyester Microplastic Fiber Exposure Study Counts, Fish Weights, and Spectral Data from a Juvenile Chinook Salmon Polyester Microplastic Fiber Exposure Study

This release includes all data collected in support of a juvenile Chinook salmon exposure study designed to understand the retention of microplastic clothing fibers (hereon referred to as "microfibers") after feeding. To understand the potential impacts of microfiber ingestion to fish, we ran a feeding experiment with juvenile Chinook salmon to determine if ingested fibers are retained...
By
Species Management Research Program, Washington Water Science Center, Western Fisheries Research Center

Data collected in 2010 to evaluate habitat availability for surf smelt and eelgrass in response to sea level rise on Bainbridge Island, Puget Sound, Washington, USA Data collected in 2010 to evaluate habitat availability for surf smelt and eelgrass in response to sea level rise on Bainbridge Island, Puget Sound, Washington, USA

This dataset includes biological variables showing surf smelt spawning presence, geological variables describing beach composition, and sample locations using RTK-GPS. This field data was also used to run the Sea Level Affecting Marshes Model (SLAMM; Warren Pinnacle Consulting, Inc., Warren, Vt)) to predict the changes to beaches over time, and under different sea level rise scenarios...
By
Ecosystems Mission Area, Species Management Research Program, Western Fisheries Research Center, Columbia River Research Laboratory (CRRL)

Maternal transfer of PCBs in Pacific sand lance in Puget Sound, Washington Maternal transfer of PCBs in Pacific sand lance in Puget Sound, Washington

Data included in this release are from Pacific sand lance and water, sediment and suspended particulate matter collected at two sites in Puget Sound, Washington, which were evaluated for PCB concentration. PCB congener data are stored in the U.S. Fish and Wildlife Service's Environmental Contaminant Data Management System (ECDMS), accessible through the Wildlife & Environmental...
By
Ecosystems Mission Area, Biological Threats and Invasive Species Research Program, Species Management Research Program, Western Fisheries Research Center, Columbia River Research Laboratory (CRRL)
One woman sitting in mud on the left side and one woman standing on the right in the marsh digging for lamprey
Scientists Digging For Lamprey
Scientists Digging For Lamprey
One woman sitting in mud on the left side and one woman standing on the right in the marsh digging for lamprey

Scientists Digging For Lamprey

Scientists Digging For Lamprey

Check out these photos from the field! Lisa K Weiland (sitting) and Leah Tai from the U.S. Fish and Wildlife Service are shown above. This project is working to learn how larval lampreys use soft substrates for burrowing.

By
Western Fisheries Research Center, Columbia River Research Laboratory (CRRL)
One woman sitting in mud on the left side and one woman standing on the right in the marsh digging for lamprey

Scientists Digging For Lamprey

Scientists Digging For Lamprey

Check out these photos from the field! Lisa K Weiland (sitting) and Leah Tai from the U.S. Fish and Wildlife Service are shown above. This project is working to learn how larval lampreys use soft substrates for burrowing.

By
Western Fisheries Research Center, Columbia River Research Laboratory (CRRL)
Filter Total Items: 73

Defining sediment handling practices to limit negative impacts to larval lampreys Defining sediment handling practices to limit negative impacts to larval lampreys

Sediment manipulation activities such as dredging and restoration efforts (e.g., culvert install/repair) may disturb habitats where larval lampreys live burrowed in stream sediments. Sediment added on top of larval lamprey burrowing areas results in ‘overburden’, which poses risks of mortality from respiratory distress, reduced movement, and crushing injuries or may have sublethal...
Authors
Theresa Liedtke, Joe Skalicky, Lisa Weiland, Julie Harris, Ann Gray, Ralph Lampman, Joy Wade
By
Ecosystems Mission Area, Western Fisheries Research Center

Pacific Lamprey responses to stressors: Dewatering and electrofishing Pacific Lamprey responses to stressors: Dewatering and electrofishing

The Pacific Lamprey Conservation Initiative (PLCI) is a collaboration of Tribes, Federal, and State agencies working together to protect and restore Pacific Lamprey (Entosphenus tridentatus) and other native lampreys (i.e., Lampetra spp.) in Alaska, Washington, Oregon, California, and Idaho. The U.S. Fish and Wildlife Service hosts and facilitates the PLCI, and the Columbia River Tribes...
Authors
Theresa Liedtke, Lisa Weiland, Joe Skalicky, Julie Harris, Monica Blanchard, Ann Grote, Ann Gray, Brian Ekstrom
By
Ecosystems Mission Area, Western Fisheries Research Center

Bringing partners together: A symposium on native lampreys and the Pacific Lamprey Conservation Initiative Bringing partners together: A symposium on native lampreys and the Pacific Lamprey Conservation Initiative

A symposium at the 2022 American Fisheries Society meeting highlighted collaborations among biologists, policymakers, and Native American tribes addressing conservation for native lampreys. We present key findings from the symposium and related research and an example of grassroots effort to protect and restore Pacific Lamprey.
Authors
Theresa Liedtke, Julianne Harris, Christina Wang, Trent Sutton
By
Ecosystems Mission Area, Western Fisheries Research Center

Shoreline slope influences movements of larval lampreys over dewatered substrate Shoreline slope influences movements of larval lampreys over dewatered substrate

Larval lampreys are filter feeders that live for several years burrowed in fine sediments in freshwater streams. Stream side channels and edges, where larval lampreys gather, are vulnerable to natural and human-caused dewatering. Water level reductions can strand and kill thousands of larval lampreys, in part because many remain burrowed until their habitats are exposed, at which point...
Authors
Theresa Liedtke, Julianne Harris, Ann Gray
By
Ecosystems Mission Area, Western Fisheries Research Center

Synthesis of larval lamprey responses to dewatering: State of the science, critical uncertainties, and management implications Synthesis of larval lamprey responses to dewatering: State of the science, critical uncertainties, and management implications

ObjectiveDewatering of fine sediments in rivers and streams can kill many thousands of larval lampreys (order Petromyzontiformes) that are burrowed in these habitats. The larval life stage for lampreys lasts 3–10 years, and because larvae often aggregate in large numbers, negative impacts from dewatering could potentially deplete local populations and affect multiple year-classes. Larval...
Authors
Theresa Liedtke, Julianne Harris, Monica Blanchard, Joseph Skalicky, Ann Grote
By
Ecosystems Mission Area, Western Fisheries Research Center, Columbia River Research Laboratory (CRRL)

First investigations on lamprey responses to elevated total dissolved gas exposure and risk of gas bubble trauma First investigations on lamprey responses to elevated total dissolved gas exposure and risk of gas bubble trauma

A flexible spill program in the federal Columbia River power system increased the total dissolved gas (TDG) water quality standards (i.e., the gas cap) from 120% to 125%. Spill is used to pass juvenile salmon (Oncorhynchus spp.) over dams, but it can generate elevated TDG, and exposed fish can develop gas bubble trauma (GBT) or experience mortality. Juvenile salmon are monitored for GBT...
Authors
Theresa Liedtke, Kenneth Tiffan, Lisa Weiland, Brian Ekstrom
By
Ecosystems Mission Area, Western Fisheries Research Center, Columbia River Research Laboratory (CRRL)

Influence of lamprey rearing type on measures of performance Influence of lamprey rearing type on measures of performance

Declines in populations of Pacific Lamprey (Entosphenus tridentatus) have raised concerns by the Columbia River tribes, who then initiated efforts to protect and restore them throughout their historical range. The Columbia River Inter-Tribal Fish Commission (CRITFC) devised a restoration plan for lamprey in the Columbia River Basin which highlights the significance of lamprey to the...
Authors
Theresa Liedtke, Lisa Weiland, Mary Moser, Kinsey Frick, Ralph Lampman, Aaron Jackson, Ann Gannam, James Baron, Brian Ekstrom
By
Ecosystems Mission Area, Western Fisheries Research Center, Columbia River Research Laboratory (CRRL)

Salvage using electrofishing methods caused minimal mortality of burrowed and emerged larval lampreys in dewatered habitats Salvage using electrofishing methods caused minimal mortality of burrowed and emerged larval lampreys in dewatered habitats

ObjectiveHuman-induced dewatering of freshwater habitats causes mortality of larval lampreys (family Petromyzontidae). Salvage by electrofishing at dewatering events is assumed to reduce this mortality, but to our knowledge this assumption remains unassessed.MethodsWe estimated mortality of salvaged larval lampreys (Lampetra spp. and Pacific Lamprey Entosphenus tridentatus) within 24 h...
Authors
Julianne Harris, Theresa Liedtke, Joseph Skalicky, Lisa Weiland
By
Ecosystems Mission Area, Western Fisheries Research Center, Columbia River Research Laboratory (CRRL)

Potential effects of sea level rise on nearshore habitat availability for surf smelt (Hypomesus pretiosus) and eelgrass (Zostera marina), Puget Sound, Washington Potential effects of sea level rise on nearshore habitat availability for surf smelt (Hypomesus pretiosus) and eelgrass (Zostera marina), Puget Sound, Washington

In this study we examine the potential effects of three predicted sea level rise (SLR) scenarios on the nearshore eelgrass (Zostera marina L.) and surf smelt (Hypomesus pretiosus) spawning habitats along a beach on Bainbridge Island, Washington. Baseline bathymetric, geomorphological, and biological surveys were conducted to determine the existing conditions at the study site. The...
Authors
Collin D. Smith, Theresa Liedtke
By
Ecosystems Mission Area, Land Management Research Program, Species Management Research Program, Western Fisheries Research Center, Columbia River Research Laboratory (CRRL)

Monitoring the movements of juvenile Pacific Lamprey (Entosphenus tridentatus) in the Yakima River, Washington, using acoustic telemetry, 2019–20 Monitoring the movements of juvenile Pacific Lamprey (Entosphenus tridentatus) in the Yakima River, Washington, using acoustic telemetry, 2019–20

Anthropogenic barriers to main-stem and tributary passage are one of the primary threats associated with declining populations of Pacific Lamprey (Entosphenus tridentatus) in the Columbia River Basin. Juvenile lamprey are of special interest because their downstream migration to the ocean may be affected by barriers such as dams or water diversions. Telemetry studies that describe the...
Authors
Theresa Liedtke, Ralph T. Lampman, Patrick Monk, Amy Hansen, Tobias Kock, Tyler Beals, Daniel Deng, Michael Porter
By
Ecosystems Mission Area, Species Management Research Program, Western Fisheries Research Center, Columbia River Research Laboratory (CRRL)

Evaluation of larval lamprey survival following salvage: A pilot study Evaluation of larval lamprey survival following salvage: A pilot study

Larval lampreys (Entosphenus tridentatus and Lampetra spp.) are vulnerable to anthropogenic water-level fluctuations that can dewater their habitat. Dewatering events occur regularly in the Columbia River Basin for operation and management of hydropower facilities, seasonal or maintenance closures of irrigation diversions, and in-water construction projects, including for habitat...
Authors
Theresa Liedtke, Julianne Harris, Joseph Skalicky, Lisa Weiland
By
Ecosystems Mission Area, Western Fisheries Research Center, Columbia River Research Laboratory (CRRL)

Behavior and survival of hatchery rainbow trout (Oncorhynchus mykiss) in the upper Cowlitz River Basin, Washington, 2013 and 2017 Behavior and survival of hatchery rainbow trout (Oncorhynchus mykiss) in the upper Cowlitz River Basin, Washington, 2013 and 2017

A two-year study (2013 and 2017) was conducted to determine if annual releases of hatchery rainbow trout (resident Oncorhynchus mykiss) in the upper Cowlitz River Basin, Washington adversely affected anadromous fish in the basin. Rainbow trout tagged with radio transmitters were monitored after release to describe movement patterns, entrainment rates at Cowlitz Falls Dam, and survival...
Authors
Amy Hansen, Tobias Kock, Brian Ekstrom, Theresa Liedtke
By
Ecosystems Mission Area, Species Management Research Program, Western Fisheries Research Center, Columbia River Research Laboratory (CRRL)

Non-USGS Publications**

Allen, B., T.L. Liedtke, A. Daniel, J. Begala, M. Salway, and J. Beeman. 2001. Monitoring tailrace egress in the stilling basin, the ice-trash sluiceway, and the powerhouse of The Dalles Dam, 2000. U.S. Army Corps of Engineers, Portland, OR. Contract No. W66QKZ00391996
Duran, I.N., T.L. Liedtke, and J.H. Petersen. 2002. Predator-prey interactions in The Dalles Dam tailrace. U.S. Army Corps of Engineers, Portland, OR.
Smith, C.D., T.L. Liedtke, B.J. Hausmann, J.L. Schei, J.R. Lyng, L.P. Gee, and J.W. Beeman. 2004. Tailrace Egress of yearling and subyearling Chinook salmon and juvenile steelhead following juvenile bypass system passage at John Day Dam, 2002. U.S. Army Corps of Engineers, Portland District, Portland, OR.

**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.

Congratulations to Joe Skalicky for Winning this Issue’s Photo Contest!

Congratulations to Joe Skalicky for Winning this Issue’s Photo Contest!

Marty Liedtke and Lisa Weiland seek to understand how larval lamprey populations survive under various substrate conditions. 

Read Article
USGS Friday's Findings - November 8, 2024

USGS Friday's Findings - November 8, 2024

Title:  An ancient rock-climbing fish: science in support of Pacific Lamprey

Date:  November 8, 2024, at 2:00-2:30 pm Eastern/11:00 -11:30 am Pacific 

S...

Read Article
Special Issue Highlights Native Lampreys

Special Issue Highlights Native Lampreys

The journal, North American Journal of Fisheries Management, recently featured a special issue on research and conservation of native lampreys.

Read Article
Western Fisheries Research Center at National American Fisheries Society Meeting

Western Fisheries Research Center at National American Fisheries Society Meeting

This August, the National American Fisheries Society met in Spokane, WA, for the 152nd annual meeting.  Fisheries managers, biologists, professors...

Read Article
USGS Signs Pacific Lamprey Conservation Agreement

USGS Signs Pacific Lamprey Conservation Agreement

The USGS has been participating in the Pacific Lamprey Conservation Initiative (PLCI) since 2008. This fall, the USGS took the next step and...

Read Article
Western Fisheries Science News, June 2016 | Issue 4.6

Western Fisheries Science News, June 2016 | Issue 4.6

New USGS and NOAA Collaboration in Alaska Will Help Gain Insight into Juvenile Chinook Salmon Distributions and Migrations

Read Article

Science and Products

Pacific sand lance

Contaminants in Puget Sound Forage Fishes and Impacts to the Marine Food Web

Toxic chemical pollutants have been released into Puget Sound for decades by human activities. There’s a wide range of contaminants, from persistent compounds like polychlorinated biphenyls (PCBs) and flame retardants to contaminants of emerging concern. Aquatic species can be exposed to and accumulate contaminants, causing disease or disruption of biological processes like growth or reproduction...
By
Ecosystems Mission Area, Western Fisheries Research Center, Columbia River Research Laboratory (CRRL)
Contaminants in Puget Sound Forage Fishes and Impacts to the Marine Food Web

Contaminants in Puget Sound Forage Fishes and Impacts to the Marine Food Web

Toxic chemical pollutants have been released into Puget Sound for decades by human activities. There’s a wide range of contaminants, from persistent compounds like polychlorinated biphenyls (PCBs) and flame retardants to contaminants of emerging concern. Aquatic species can be exposed to and accumulate contaminants, causing disease or disruption of biological processes like growth or reproduction...
Learn More

Evaluating injury and mortality to larval lamprey collected out of sediment using a portable suction dredge Evaluating injury and mortality to larval lamprey collected out of sediment using a portable suction dredge

Dataset describes the findings of a combination of field and laboratory tests to see if larval lamprey were injured or killed after they were collected from their burrows in sediment using a portable suction dredge.
By
Ecosystems Mission Area, Species Management Research Program, Western Fisheries Research Center, Columbia River Research Laboratory (CRRL)

Counts, Fish Weights, and Spectral Data from a Juvenile Chinook Salmon Polyester Microplastic Fiber Exposure Study Counts, Fish Weights, and Spectral Data from a Juvenile Chinook Salmon Polyester Microplastic Fiber Exposure Study

This release includes all data collected in support of a juvenile Chinook salmon exposure study designed to understand the retention of microplastic clothing fibers (hereon referred to as "microfibers") after feeding. To understand the potential impacts of microfiber ingestion to fish, we ran a feeding experiment with juvenile Chinook salmon to determine if ingested fibers are retained...
By
Species Management Research Program, Washington Water Science Center, Western Fisheries Research Center

Data collected in 2010 to evaluate habitat availability for surf smelt and eelgrass in response to sea level rise on Bainbridge Island, Puget Sound, Washington, USA Data collected in 2010 to evaluate habitat availability for surf smelt and eelgrass in response to sea level rise on Bainbridge Island, Puget Sound, Washington, USA

This dataset includes biological variables showing surf smelt spawning presence, geological variables describing beach composition, and sample locations using RTK-GPS. This field data was also used to run the Sea Level Affecting Marshes Model (SLAMM; Warren Pinnacle Consulting, Inc., Warren, Vt)) to predict the changes to beaches over time, and under different sea level rise scenarios...
By
Ecosystems Mission Area, Species Management Research Program, Western Fisheries Research Center, Columbia River Research Laboratory (CRRL)

Maternal transfer of PCBs in Pacific sand lance in Puget Sound, Washington Maternal transfer of PCBs in Pacific sand lance in Puget Sound, Washington

Data included in this release are from Pacific sand lance and water, sediment and suspended particulate matter collected at two sites in Puget Sound, Washington, which were evaluated for PCB concentration. PCB congener data are stored in the U.S. Fish and Wildlife Service's Environmental Contaminant Data Management System (ECDMS), accessible through the Wildlife & Environmental...
By
Ecosystems Mission Area, Biological Threats and Invasive Species Research Program, Species Management Research Program, Western Fisheries Research Center, Columbia River Research Laboratory (CRRL)
One woman sitting in mud on the left side and one woman standing on the right in the marsh digging for lamprey
Scientists Digging For Lamprey
Scientists Digging For Lamprey
One woman sitting in mud on the left side and one woman standing on the right in the marsh digging for lamprey

Scientists Digging For Lamprey

Scientists Digging For Lamprey

Check out these photos from the field! Lisa K Weiland (sitting) and Leah Tai from the U.S. Fish and Wildlife Service are shown above. This project is working to learn how larval lampreys use soft substrates for burrowing.

By
Western Fisheries Research Center, Columbia River Research Laboratory (CRRL)
One woman sitting in mud on the left side and one woman standing on the right in the marsh digging for lamprey

Scientists Digging For Lamprey

Scientists Digging For Lamprey

Check out these photos from the field! Lisa K Weiland (sitting) and Leah Tai from the U.S. Fish and Wildlife Service are shown above. This project is working to learn how larval lampreys use soft substrates for burrowing.

By
Western Fisheries Research Center, Columbia River Research Laboratory (CRRL)
Filter Total Items: 73

Defining sediment handling practices to limit negative impacts to larval lampreys Defining sediment handling practices to limit negative impacts to larval lampreys

Sediment manipulation activities such as dredging and restoration efforts (e.g., culvert install/repair) may disturb habitats where larval lampreys live burrowed in stream sediments. Sediment added on top of larval lamprey burrowing areas results in ‘overburden’, which poses risks of mortality from respiratory distress, reduced movement, and crushing injuries or may have sublethal...
Authors
Theresa Liedtke, Joe Skalicky, Lisa Weiland, Julie Harris, Ann Gray, Ralph Lampman, Joy Wade
By
Ecosystems Mission Area, Western Fisheries Research Center

Pacific Lamprey responses to stressors: Dewatering and electrofishing Pacific Lamprey responses to stressors: Dewatering and electrofishing

The Pacific Lamprey Conservation Initiative (PLCI) is a collaboration of Tribes, Federal, and State agencies working together to protect and restore Pacific Lamprey (Entosphenus tridentatus) and other native lampreys (i.e., Lampetra spp.) in Alaska, Washington, Oregon, California, and Idaho. The U.S. Fish and Wildlife Service hosts and facilitates the PLCI, and the Columbia River Tribes...
Authors
Theresa Liedtke, Lisa Weiland, Joe Skalicky, Julie Harris, Monica Blanchard, Ann Grote, Ann Gray, Brian Ekstrom
By
Ecosystems Mission Area, Western Fisheries Research Center

Bringing partners together: A symposium on native lampreys and the Pacific Lamprey Conservation Initiative Bringing partners together: A symposium on native lampreys and the Pacific Lamprey Conservation Initiative

A symposium at the 2022 American Fisheries Society meeting highlighted collaborations among biologists, policymakers, and Native American tribes addressing conservation for native lampreys. We present key findings from the symposium and related research and an example of grassroots effort to protect and restore Pacific Lamprey.
Authors
Theresa Liedtke, Julianne Harris, Christina Wang, Trent Sutton
By
Ecosystems Mission Area, Western Fisheries Research Center

Shoreline slope influences movements of larval lampreys over dewatered substrate Shoreline slope influences movements of larval lampreys over dewatered substrate

Larval lampreys are filter feeders that live for several years burrowed in fine sediments in freshwater streams. Stream side channels and edges, where larval lampreys gather, are vulnerable to natural and human-caused dewatering. Water level reductions can strand and kill thousands of larval lampreys, in part because many remain burrowed until their habitats are exposed, at which point...
Authors
Theresa Liedtke, Julianne Harris, Ann Gray
By
Ecosystems Mission Area, Western Fisheries Research Center

Synthesis of larval lamprey responses to dewatering: State of the science, critical uncertainties, and management implications Synthesis of larval lamprey responses to dewatering: State of the science, critical uncertainties, and management implications

ObjectiveDewatering of fine sediments in rivers and streams can kill many thousands of larval lampreys (order Petromyzontiformes) that are burrowed in these habitats. The larval life stage for lampreys lasts 3–10 years, and because larvae often aggregate in large numbers, negative impacts from dewatering could potentially deplete local populations and affect multiple year-classes. Larval...
Authors
Theresa Liedtke, Julianne Harris, Monica Blanchard, Joseph Skalicky, Ann Grote
By
Ecosystems Mission Area, Western Fisheries Research Center, Columbia River Research Laboratory (CRRL)

First investigations on lamprey responses to elevated total dissolved gas exposure and risk of gas bubble trauma First investigations on lamprey responses to elevated total dissolved gas exposure and risk of gas bubble trauma

A flexible spill program in the federal Columbia River power system increased the total dissolved gas (TDG) water quality standards (i.e., the gas cap) from 120% to 125%. Spill is used to pass juvenile salmon (Oncorhynchus spp.) over dams, but it can generate elevated TDG, and exposed fish can develop gas bubble trauma (GBT) or experience mortality. Juvenile salmon are monitored for GBT...
Authors
Theresa Liedtke, Kenneth Tiffan, Lisa Weiland, Brian Ekstrom
By
Ecosystems Mission Area, Western Fisheries Research Center, Columbia River Research Laboratory (CRRL)

Influence of lamprey rearing type on measures of performance Influence of lamprey rearing type on measures of performance

Declines in populations of Pacific Lamprey (Entosphenus tridentatus) have raised concerns by the Columbia River tribes, who then initiated efforts to protect and restore them throughout their historical range. The Columbia River Inter-Tribal Fish Commission (CRITFC) devised a restoration plan for lamprey in the Columbia River Basin which highlights the significance of lamprey to the...
Authors
Theresa Liedtke, Lisa Weiland, Mary Moser, Kinsey Frick, Ralph Lampman, Aaron Jackson, Ann Gannam, James Baron, Brian Ekstrom
By
Ecosystems Mission Area, Western Fisheries Research Center, Columbia River Research Laboratory (CRRL)

Salvage using electrofishing methods caused minimal mortality of burrowed and emerged larval lampreys in dewatered habitats Salvage using electrofishing methods caused minimal mortality of burrowed and emerged larval lampreys in dewatered habitats

ObjectiveHuman-induced dewatering of freshwater habitats causes mortality of larval lampreys (family Petromyzontidae). Salvage by electrofishing at dewatering events is assumed to reduce this mortality, but to our knowledge this assumption remains unassessed.MethodsWe estimated mortality of salvaged larval lampreys (Lampetra spp. and Pacific Lamprey Entosphenus tridentatus) within 24 h...
Authors
Julianne Harris, Theresa Liedtke, Joseph Skalicky, Lisa Weiland
By
Ecosystems Mission Area, Western Fisheries Research Center, Columbia River Research Laboratory (CRRL)

Potential effects of sea level rise on nearshore habitat availability for surf smelt (Hypomesus pretiosus) and eelgrass (Zostera marina), Puget Sound, Washington Potential effects of sea level rise on nearshore habitat availability for surf smelt (Hypomesus pretiosus) and eelgrass (Zostera marina), Puget Sound, Washington

In this study we examine the potential effects of three predicted sea level rise (SLR) scenarios on the nearshore eelgrass (Zostera marina L.) and surf smelt (Hypomesus pretiosus) spawning habitats along a beach on Bainbridge Island, Washington. Baseline bathymetric, geomorphological, and biological surveys were conducted to determine the existing conditions at the study site. The...
Authors
Collin D. Smith, Theresa Liedtke
By
Ecosystems Mission Area, Land Management Research Program, Species Management Research Program, Western Fisheries Research Center, Columbia River Research Laboratory (CRRL)

Monitoring the movements of juvenile Pacific Lamprey (Entosphenus tridentatus) in the Yakima River, Washington, using acoustic telemetry, 2019–20 Monitoring the movements of juvenile Pacific Lamprey (Entosphenus tridentatus) in the Yakima River, Washington, using acoustic telemetry, 2019–20

Anthropogenic barriers to main-stem and tributary passage are one of the primary threats associated with declining populations of Pacific Lamprey (Entosphenus tridentatus) in the Columbia River Basin. Juvenile lamprey are of special interest because their downstream migration to the ocean may be affected by barriers such as dams or water diversions. Telemetry studies that describe the...
Authors
Theresa Liedtke, Ralph T. Lampman, Patrick Monk, Amy Hansen, Tobias Kock, Tyler Beals, Daniel Deng, Michael Porter
By
Ecosystems Mission Area, Species Management Research Program, Western Fisheries Research Center, Columbia River Research Laboratory (CRRL)

Evaluation of larval lamprey survival following salvage: A pilot study Evaluation of larval lamprey survival following salvage: A pilot study

Larval lampreys (Entosphenus tridentatus and Lampetra spp.) are vulnerable to anthropogenic water-level fluctuations that can dewater their habitat. Dewatering events occur regularly in the Columbia River Basin for operation and management of hydropower facilities, seasonal or maintenance closures of irrigation diversions, and in-water construction projects, including for habitat...
Authors
Theresa Liedtke, Julianne Harris, Joseph Skalicky, Lisa Weiland
By
Ecosystems Mission Area, Western Fisheries Research Center, Columbia River Research Laboratory (CRRL)

Behavior and survival of hatchery rainbow trout (Oncorhynchus mykiss) in the upper Cowlitz River Basin, Washington, 2013 and 2017 Behavior and survival of hatchery rainbow trout (Oncorhynchus mykiss) in the upper Cowlitz River Basin, Washington, 2013 and 2017

A two-year study (2013 and 2017) was conducted to determine if annual releases of hatchery rainbow trout (resident Oncorhynchus mykiss) in the upper Cowlitz River Basin, Washington adversely affected anadromous fish in the basin. Rainbow trout tagged with radio transmitters were monitored after release to describe movement patterns, entrainment rates at Cowlitz Falls Dam, and survival...
Authors
Amy Hansen, Tobias Kock, Brian Ekstrom, Theresa Liedtke
By
Ecosystems Mission Area, Species Management Research Program, Western Fisheries Research Center, Columbia River Research Laboratory (CRRL)

Non-USGS Publications**

Allen, B., T.L. Liedtke, A. Daniel, J. Begala, M. Salway, and J. Beeman. 2001. Monitoring tailrace egress in the stilling basin, the ice-trash sluiceway, and the powerhouse of The Dalles Dam, 2000. U.S. Army Corps of Engineers, Portland, OR. Contract No. W66QKZ00391996
Duran, I.N., T.L. Liedtke, and J.H. Petersen. 2002. Predator-prey interactions in The Dalles Dam tailrace. U.S. Army Corps of Engineers, Portland, OR.
Smith, C.D., T.L. Liedtke, B.J. Hausmann, J.L. Schei, J.R. Lyng, L.P. Gee, and J.W. Beeman. 2004. Tailrace Egress of yearling and subyearling Chinook salmon and juvenile steelhead following juvenile bypass system passage at John Day Dam, 2002. U.S. Army Corps of Engineers, Portland District, Portland, OR.

**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.

Congratulations to Joe Skalicky for Winning this Issue’s Photo Contest!

Congratulations to Joe Skalicky for Winning this Issue’s Photo Contest!

Marty Liedtke and Lisa Weiland seek to understand how larval lamprey populations survive under various substrate conditions. 

Read Article
USGS Friday's Findings - November 8, 2024

USGS Friday's Findings - November 8, 2024

Title:  An ancient rock-climbing fish: science in support of Pacific Lamprey

Date:  November 8, 2024, at 2:00-2:30 pm Eastern/11:00 -11:30 am Pacific 

S...

Read Article
Special Issue Highlights Native Lampreys

Special Issue Highlights Native Lampreys

The journal, North American Journal of Fisheries Management, recently featured a special issue on research and conservation of native lampreys.

Read Article
Western Fisheries Research Center at National American Fisheries Society Meeting

Western Fisheries Research Center at National American Fisheries Society Meeting

This August, the National American Fisheries Society met in Spokane, WA, for the 152nd annual meeting.  Fisheries managers, biologists, professors...

Read Article
USGS Signs Pacific Lamprey Conservation Agreement

USGS Signs Pacific Lamprey Conservation Agreement

The USGS has been participating in the Pacific Lamprey Conservation Initiative (PLCI) since 2008. This fall, the USGS took the next step and...

Read Article
Western Fisheries Science News, June 2016 | Issue 4.6

Western Fisheries Science News, June 2016 | Issue 4.6

New USGS and NOAA Collaboration in Alaska Will Help Gain Insight into Juvenile Chinook Salmon Distributions and Migrations

Read Article
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