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.
Lisa Weiland
Lisa is a Biological Science Technician at the Columbia River Research Laboratory.
Science and Products
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.
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...
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.
Filter Total Items: 27
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 K. Weiland, Julie Harris, Ann E. Gray, Ralph Lampman, Joy Wade
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 K. Weiland, Joe Skalicky, Julie Harris, Monica R. Blanchard, Ann B. Grote, Ann E. Gray, Brian K. Ekstrom
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 K. Weiland, Brian K. Ekstrom
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 K. Weiland, Mary L. Moser, Kinsey Frick, Ralph Lampman, Aaron D. Jackson, Ann Gannam, James Baron, Brian K. Ekstrom
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 E. Harris, Theresa Liedtke, Joseph J. Skalicky, Lisa K. Weiland
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 E. Harris, Joseph J. Skalicky, Lisa K. Weiland
Collection of larval lampreys (Entosphenus tridentatus and Lampetra spp.) using a portable suction dredge—A pilot test
A portable suction-dredge and sluice-box system were used to collect larval lampreys (Entosphenus tridentatus and Lampetra spp.) from fine and coarse sediment in field and laboratory tests. We evaluated the injury rate, survival, and burrowing capability of lamprey following passage through the dredge system and used collection of lamprey from water without sediment as a control. The...
Authors
Theresa Liedtke, Joseph J. Skalicky, Lisa K. Weiland
Effects of dewatering on behavior, distribution, and abundance of larval lampreys
Anthropogenic dewatering of aquatic habitats can cause stranding and mortality of burrowed larval lampreys; however, the effects of dewatering have not been quantified. We assessed: (a) changes in spatial distribution, abundance, and emergence of larvae dewatered at Leaburg Reservoir (OR); (b) emergence and mortality of larvae dewatered in a laboratory; and (c) bias, precision, and...
Authors
Julianne E. Harris, Joseph J. Skalicky, Theresa Liedtke, Lisa K. Weiland, Benjamin J. Clemens, Ann E. Gray
Evidence for rapid gut clearance of microplastic polyester fibers fed to Chinook Salmon: A tank study
Marine and freshwater plastic pollution is a challenging issue receiving large amounts of research and media attention. Yet, few studies have documented the impact of microplastic ingestion to aquatic organisms. In the Pacific Northwest, Chinook salmon are a culturally and commercially significant fish species. The presence of marine and freshwater microplastic pollution is well...
Authors
Andrew R. Spanjer, Theresa Liedtke, Kathleen Conn, Lisa K. Weiland, Robert W. Black, Nathan Godfrey
Evaluating dewatering approaches to protect larval Pacific lamprey
Executive SummaryLarval Pacific lamprey live for several years burrowed in nearshore sediments where they filter feed on detritus and organic matter. Dewatering of larval habitat can occur as a result of flow-management practices, construction projects, or seasonal closures of irrigation diversions. Effective management of dewatering events requires guidance on approaches to protect...
Authors
Theresa Liedtke, Lisa K. Weiland, Joseph J. Skalicky, Ann E. Gray
Effectiveness of fish screens in protecting lamprey (Entosphenus and Lampetra spp.) ammocoetes—Pilot testing of variable screen angle
Thousands of screened water diversions throughout the Columbia River Basin of the Pacific Northwest are sources of entrainment (unintended diversion into an unsafe passage route), injury, and mortality for a range of fish species and screening criteria have been developed to reduce and mitigate these effects. Large knowledge gaps exist concerning the potential effects of these screens on...
Authors
Theresa Liedtke, Daniel J. Didricksen, Lisa K. Weiland, Joshua A. Ragala, Ralph Lampman
Emigration and transportation stress of juvenile Chinook salmon relative to their reintroduction upriver of Shasta Dam, California, 2017–18
The Bureau of Reclamation supports the Shasta Dam Fish Passage Evaluation (SDFPE; Yip, 2015) program, and in 2016 set out to determine the feasibility of reintroducing winter-run and spring-run Chinook salmon (Oncorhynchus tshawytscha) and steelhead (O. mykiss) to tributaries upstream of Shasta Dam. Ideally, reintroduction strategy includes trapping naturally produced downstream...
Authors
Noah S. Adams, Theresa Liedtke, John Plumb, Lisa K. Weiland, Amy C. Hansen, Scott D. Evans
Science and Products
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.
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...
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.
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.
Filter Total Items: 27
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 K. Weiland, Julie Harris, Ann E. Gray, Ralph Lampman, Joy Wade
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 K. Weiland, Joe Skalicky, Julie Harris, Monica R. Blanchard, Ann B. Grote, Ann E. Gray, Brian K. Ekstrom
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 K. Weiland, Brian K. Ekstrom
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 K. Weiland, Mary L. Moser, Kinsey Frick, Ralph Lampman, Aaron D. Jackson, Ann Gannam, James Baron, Brian K. Ekstrom
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 E. Harris, Theresa Liedtke, Joseph J. Skalicky, Lisa K. Weiland
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 E. Harris, Joseph J. Skalicky, Lisa K. Weiland
Collection of larval lampreys (Entosphenus tridentatus and Lampetra spp.) using a portable suction dredge—A pilot test
A portable suction-dredge and sluice-box system were used to collect larval lampreys (Entosphenus tridentatus and Lampetra spp.) from fine and coarse sediment in field and laboratory tests. We evaluated the injury rate, survival, and burrowing capability of lamprey following passage through the dredge system and used collection of lamprey from water without sediment as a control. The...
Authors
Theresa Liedtke, Joseph J. Skalicky, Lisa K. Weiland
Effects of dewatering on behavior, distribution, and abundance of larval lampreys
Anthropogenic dewatering of aquatic habitats can cause stranding and mortality of burrowed larval lampreys; however, the effects of dewatering have not been quantified. We assessed: (a) changes in spatial distribution, abundance, and emergence of larvae dewatered at Leaburg Reservoir (OR); (b) emergence and mortality of larvae dewatered in a laboratory; and (c) bias, precision, and...
Authors
Julianne E. Harris, Joseph J. Skalicky, Theresa Liedtke, Lisa K. Weiland, Benjamin J. Clemens, Ann E. Gray
Evidence for rapid gut clearance of microplastic polyester fibers fed to Chinook Salmon: A tank study
Marine and freshwater plastic pollution is a challenging issue receiving large amounts of research and media attention. Yet, few studies have documented the impact of microplastic ingestion to aquatic organisms. In the Pacific Northwest, Chinook salmon are a culturally and commercially significant fish species. The presence of marine and freshwater microplastic pollution is well...
Authors
Andrew R. Spanjer, Theresa Liedtke, Kathleen Conn, Lisa K. Weiland, Robert W. Black, Nathan Godfrey
Evaluating dewatering approaches to protect larval Pacific lamprey
Executive SummaryLarval Pacific lamprey live for several years burrowed in nearshore sediments where they filter feed on detritus and organic matter. Dewatering of larval habitat can occur as a result of flow-management practices, construction projects, or seasonal closures of irrigation diversions. Effective management of dewatering events requires guidance on approaches to protect...
Authors
Theresa Liedtke, Lisa K. Weiland, Joseph J. Skalicky, Ann E. Gray
Effectiveness of fish screens in protecting lamprey (Entosphenus and Lampetra spp.) ammocoetes—Pilot testing of variable screen angle
Thousands of screened water diversions throughout the Columbia River Basin of the Pacific Northwest are sources of entrainment (unintended diversion into an unsafe passage route), injury, and mortality for a range of fish species and screening criteria have been developed to reduce and mitigate these effects. Large knowledge gaps exist concerning the potential effects of these screens on...
Authors
Theresa Liedtke, Daniel J. Didricksen, Lisa K. Weiland, Joshua A. Ragala, Ralph Lampman
Emigration and transportation stress of juvenile Chinook salmon relative to their reintroduction upriver of Shasta Dam, California, 2017–18
The Bureau of Reclamation supports the Shasta Dam Fish Passage Evaluation (SDFPE; Yip, 2015) program, and in 2016 set out to determine the feasibility of reintroducing winter-run and spring-run Chinook salmon (Oncorhynchus tshawytscha) and steelhead (O. mykiss) to tributaries upstream of Shasta Dam. Ideally, reintroduction strategy includes trapping naturally produced downstream...
Authors
Noah S. Adams, Theresa Liedtke, John Plumb, Lisa K. Weiland, Amy C. Hansen, Scott D. Evans