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Marshal is a Biological Science Laboratory Technician at the Western Fisheries Research Center.
Research Interests:
I am a member of the Ecology Section at the U.S. Geological Survey's Western Fisheries Research Center in Seattle, WA. I have participated in several projects using environmental DNA (eDNA) technology, which includes involvement in the entire process from molecular assay design, field sampling and laboratory processing/analysis. We have used eDNA based methods to:
I am also involved in many other exciting projects such as the genetic analysis of several fish species (including the development of genetic species marker for the endangered Lost River and shortnose suckers in the Klamath Basin), using food web interactions and bioenergetics to study juvenile salmon survival in Puget Sound, and USGS Elwha River nearshore long-term dam removal monitoring project.
USGS 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 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 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 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.
Researchers on their way to sampling site on Diablo Lake. Diablo Lake is a reservoir in the North Cascade mountains of northern Washington. Created by Diablo Dam, the lake is located between Ross Lake and Gorge Lake on the Skagit River.
Researchers on their way to sampling site on Diablo Lake. Diablo Lake is a reservoir in the North Cascade mountains of northern Washington. Created by Diablo Dam, the lake is located between Ross Lake and Gorge Lake on the Skagit River.
Herring (top) and juvenile Chinook salmon (bottom) flushed from the stomach of a resident Chinook salmon in Puget Sound.
Herring (top) and juvenile Chinook salmon (bottom) flushed from the stomach of a resident Chinook salmon in Puget Sound.
USGS 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 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 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 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.
Researchers on their way to sampling site on Diablo Lake. Diablo Lake is a reservoir in the North Cascade mountains of northern Washington. Created by Diablo Dam, the lake is located between Ross Lake and Gorge Lake on the Skagit River.
Researchers on their way to sampling site on Diablo Lake. Diablo Lake is a reservoir in the North Cascade mountains of northern Washington. Created by Diablo Dam, the lake is located between Ross Lake and Gorge Lake on the Skagit River.
Herring (top) and juvenile Chinook salmon (bottom) flushed from the stomach of a resident Chinook salmon in Puget Sound.
Herring (top) and juvenile Chinook salmon (bottom) flushed from the stomach of a resident Chinook salmon in Puget Sound.