Theresa "Marty" Liedtke
Marty Liedtke is a Project Leader at the Columbia River Research Laboratory with 25+ years of experience focused on movement, behavior, and performance of fishes in both freshwater and marine systems.
My research is currently focused on Pacific Lamprey and other native lampreys in the Columbia River Basin and forage fishes in Puget Sound. My team evaluates juvenile and larval lamprey performance under controlled laboratory conditions to address management needs such as dewatering of lamprey habitat, interactions with screens at water diversions, and dredging impacts. A newly developed, prototype acoustic telemetry transmitter, designed for use in lamprey and eels allowed us to conduct one of the first acoustic telemetry studies of juvenile Pacific lamprey migration movements. Prior to the development of this transmitter such studies were not possible due to the small size of these fish. In Puget Sound we have focused on Pacific sand lance and surf smelt and have evaluated spawning site selection, responses to climate change, food habits, and rearing habitats. Most recently we are investigating linkages between forage fishes and legacy and current use contaminants in both field and laboratory settings.
Historically my team has conducted radio and acoustic telemetry studies to evaluate juvenile salmon passage and survival at hydroelectric dams in the Columbia River Basin. We have used telemetry to monitor the behavior and movements of many fishes, including adult salmonids using transmitters with sensors (temperature, motion). I have developed standard operating procedures for surgical implantation of transmitters and regularly train others to design tagging operations and conduct tagging for telemetry studies. I am interested in the performance of fish equipped with telemetry transmitters, specifically comparing the stress response, swimming performance, buoyancy compensation, and predator avoidance ability of tagged fish to untagged fish.
Professional Experience
1994 to Present - Research Fish Biologist, U.S. Geological Survey, Western Fisheries Research Center, Columbia River Research Laboratory, Cook, WA
Education and Certifications
M.S. Zoology/Marine Biology, University of Hawaii, Honolulu, HI
B.S. Biology, Illinois State University, Normal, IL
Science and Products
Emigration and transportation stress of juvenile Chinook salmon relative to their reintroduction upriver of Shasta Dam, California, 2017–18
Responses of hatchery‐ and natural‐origin adult spring Chinook Salmon to a trap‐and‐haul reintroduction program
Passage survival of juvenile steelhead, coho salmon, and Chinook salmon in Lake Scanewa and at Cowlitz Falls Dam, Cowlitz River, Washington, 2010–16
Effectiveness of common fish screen materials for protecting lamprey ammocoetes—Influence of sweeping velocities and decreasing flows
Yolo Bypass Juvenile Salmon Utilization Study 2016—Summary of acoustically tagged juvenile salmon and study fish release, Sacramento River, California
Preliminary evaluation of the behavior and movements of adult spring Chinook salmon in the Chehalis River, southwestern Washington, 2014
Behavior and movements of adult spring Chinook salmon (Oncorhynchus tshawytscha) in the Chehalis River Basin, southwestern Washington, 2015
Behavior patterns and fates of adult steelhead, Chinook salmon, and coho salmon released into the upper Cowlitz River Basin, 2005–09 and 2012, Washington
Evaluation of a floating fish guidance structure at a hydrodynamically complex river junction in the Sacramento-San Joaquin River Delta, California, USA
Angler harvest, hatchery return, and tributary stray rates of recycled adult summer steelhead Oncorhynchus mykiss in the Cowlitz River, Washington
Vulnerability of larval lamprey to Columbia River hydropower system operations—effects of dewatering on larval lamprey movements and survival
Evaluation of two juvenile salmon collection devices at Cowlitz Falls Dam, Washington, 2014
Non-USGS Publications**
**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.
Science and Products
Emigration and transportation stress of juvenile Chinook salmon relative to their reintroduction upriver of Shasta Dam, California, 2017–18
Responses of hatchery‐ and natural‐origin adult spring Chinook Salmon to a trap‐and‐haul reintroduction program
Passage survival of juvenile steelhead, coho salmon, and Chinook salmon in Lake Scanewa and at Cowlitz Falls Dam, Cowlitz River, Washington, 2010–16
Effectiveness of common fish screen materials for protecting lamprey ammocoetes—Influence of sweeping velocities and decreasing flows
Yolo Bypass Juvenile Salmon Utilization Study 2016—Summary of acoustically tagged juvenile salmon and study fish release, Sacramento River, California
Preliminary evaluation of the behavior and movements of adult spring Chinook salmon in the Chehalis River, southwestern Washington, 2014
Behavior and movements of adult spring Chinook salmon (Oncorhynchus tshawytscha) in the Chehalis River Basin, southwestern Washington, 2015
Behavior patterns and fates of adult steelhead, Chinook salmon, and coho salmon released into the upper Cowlitz River Basin, 2005–09 and 2012, Washington
Evaluation of a floating fish guidance structure at a hydrodynamically complex river junction in the Sacramento-San Joaquin River Delta, California, USA
Angler harvest, hatchery return, and tributary stray rates of recycled adult summer steelhead Oncorhynchus mykiss in the Cowlitz River, Washington
Vulnerability of larval lamprey to Columbia River hydropower system operations—effects of dewatering on larval lamprey movements and survival
Evaluation of two juvenile salmon collection devices at Cowlitz Falls Dam, Washington, 2014
Non-USGS Publications**
**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.