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
Behavior and movement of adult chum salmon in the lower Cowlitz River, 2007: Final Report of Research
Behavior and passage of juvenile salmonids during evaluation of a fish screen at Cowlitz Falls, Dam, 2007: Final Report of Research
Laboratory evaluation of predator avoidance ability, tag loss, and tissue response of acoustic-tagged juvenile salmonids: Draft Annual Report of Research 2006
Migration behavior of radio-tagged adult coho salmon and steelhead in the upper North Fork Toutle River, Washington: Final report of research 2005-2006
Behavior and passage of juvenile salmonids during evaluation of a new fish screen at Cowlitz Falls Dam, 2006
Biological science in Oregon
Tailrace Egress of yearling and subyearling Chinook salmon and juvenile steelhead following juvenile bypass system passage at John Day Dam, 2002
Some preliminary findings on the nutritional status of the Hawaiian spiny lobster (Panulirus marginatus)
Nonlethal gill biopsy does not affect juvenile chinook salmon implanted with radio transmitters
Movement, distribution, and behavior of radio-tagged juvenile chinook salmon in John Day, the Dalles, and Bonneville Dam forebays, 1996
Growth and physiological responses to surgical and gastric radio transmitter implantation techniques in subyearling chinook salmon (Oncorhynchus tshawytscha)
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
Behavior and movement of adult chum salmon in the lower Cowlitz River, 2007: Final Report of Research
Behavior and passage of juvenile salmonids during evaluation of a fish screen at Cowlitz Falls, Dam, 2007: Final Report of Research
Laboratory evaluation of predator avoidance ability, tag loss, and tissue response of acoustic-tagged juvenile salmonids: Draft Annual Report of Research 2006
Migration behavior of radio-tagged adult coho salmon and steelhead in the upper North Fork Toutle River, Washington: Final report of research 2005-2006
Behavior and passage of juvenile salmonids during evaluation of a new fish screen at Cowlitz Falls Dam, 2006
Biological science in Oregon
Tailrace Egress of yearling and subyearling Chinook salmon and juvenile steelhead following juvenile bypass system passage at John Day Dam, 2002
Some preliminary findings on the nutritional status of the Hawaiian spiny lobster (Panulirus marginatus)
Nonlethal gill biopsy does not affect juvenile chinook salmon implanted with radio transmitters
Movement, distribution, and behavior of radio-tagged juvenile chinook salmon in John Day, the Dalles, and Bonneville Dam forebays, 1996
Growth and physiological responses to surgical and gastric radio transmitter implantation techniques in subyearling chinook salmon (Oncorhynchus tshawytscha)
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.