Marshal Hoy
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:
- Monitor recolonization, distribution and migration of fish species
- Provide abundance/biomass/density estimates
- Quantification of biodiversity in Marine communities.
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.
Professional Experience
4/2009 to Present- Biological Science Laboratory Technician, U.S. Geological Survey, Western Fisheries Research Center, Seattle, WA
2002 - 4/2009- Research Scientist, University of Washington, Seattle, WA
Education and Certifications
B.S. Botany, University of Washington, Seattle, WA
Honors and Awards
1/2010 - Star Award, U.S. Geological Survey, Western Fisheries Research Center, Seattle, WA
Science and Products
Juvenile sucker cohort tracking data summary and assessment of monitoring program, 2015
Health and condition of endangered juvenile Lost River and shortnose suckers relative to water quality and fish assemblages in Upper Klamath Lake, Oregon, and Clear Lake Reservoir, California
Development of 20 TaqMan assays differentiating the endangered shortnose and Lost River suckers
Intragenomic sequence variation at the ITS1 - ITS2 region and at the 18S and 28S nuclear ribosomal DNA genes of the New Zealand mud snail, Potamopyrgus antipodarum (Hydrobiidae: mollusca)
Salinity adaptation of the invasive New Zealand mud snail (Potamopyrgus antipodarum) in the Columbia River estuary (Pacific Northwest, USA): Physiological and molecular studies
Development of a molecular diagnostic system to discriminate Dreissena polymorpha (zebra mussel) and Dreissena bugensis (quagga mussel)
Molecular detection of native and invasive marine invertebrate larvae present in ballast and open water environmental samples collected in Puget Sound
Stress tolerance in plants via habitat-adapted symbiosis
Science and Products
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Filter Total Items: 20
Juvenile sucker cohort tracking data summary and assessment of monitoring program, 2015
Populations of federally endangered Lost River (Deltistes luxatus) and shortnose suckers (Chasmistes brevirostris) in Upper Klamath Lake, Oregon, are experiencing long-term declines in abundance. Upper Klamath Lake populations are decreasing because adult mortality, which is relatively low, is not being balanced by recruitment of young adult suckers into known adult spawning aggregations. PreviousAuthorsSummer M. Burdick, Carl O. Ostberg, Mark E. Hereford, Marshal S. HoyHealth and condition of endangered juvenile Lost River and shortnose suckers relative to water quality and fish assemblages in Upper Klamath Lake, Oregon, and Clear Lake Reservoir, California
Executive Summary Most mortality of endangered Lost River (Deltistes luxatus) and shortnose (Chasmistes brevirostris) suckers in Upper Klamath Lake, Oregon, appears to occur within the first year of life. However, juvenile suckers in Clear Lake Reservoir, California, appear to survive longer and may even recruit to the spawning populations. Our goal in this study was to develop productive lines ofAuthorsSummer M. Burdick, Diane G. Elliott, Carl O. Ostberg, Carla M. Conway, Amari Dolan-Caret, Marshal S. Hoy, Kevin P. Feltz, Kathy R. EcholsDevelopment of 20 TaqMan assays differentiating the endangered shortnose and Lost River suckers
Accurate species identification is vital to conservation and management of species at risk. Species identification is challenging when taxa express similar phenotypic characters and form hybrids, for example the endangered shortnose sucker (Chasmistes brevirostris) and Lost River sucker (Deltistes luxatus). Here, we developed 20 Taqman assays that differentiate these species (19 nuclear DNA and onAuthorsMarshal S. Hoy, Carl O. OstbergIntragenomic sequence variation at the ITS1 - ITS2 region and at the 18S and 28S nuclear ribosomal DNA genes of the New Zealand mud snail, Potamopyrgus antipodarum (Hydrobiidae: mollusca)
Molecular genetic analysis was conducted on two populations of the invasive non-native New Zealand mud snail (Potamopyrgus antipodarum), one from a freshwater ecosystem in Devil's Lake (Oregon, USA) and the other from an ecosystem of higher salinity in the Columbia River estuary (Hammond Harbor, Oregon, USA). To elucidate potential genetic differences between the two populations, three segments ofAuthorsMarshal S. Hoy, Rusty J. RodriguezSalinity adaptation of the invasive New Zealand mud snail (Potamopyrgus antipodarum) in the Columbia River estuary (Pacific Northwest, USA): Physiological and molecular studies
In this study, we examine salinity stress tolerances of two populations of the invasive species New Zealand mud snail Potamopyrgus antipodarum, one population from a high salinity environment in the Columbia River estuary and the other from a fresh water lake. In 1996, New Zealand mud snails were discovered in the tidal reaches of the Columbia River estuary that is routinely exposed to salinity atAuthorsMarshal Hoy, Bruce L. Boese, Louise Taylor, Deborah Reusser, Rusty RodriguezDevelopment of a molecular diagnostic system to discriminate Dreissena polymorpha (zebra mussel) and Dreissena bugensis (quagga mussel)
A 3-primer PCR system was developed to discriminate invasive zebra (Dreissena polymorpha) and quagga (Dreissena bugensis) mussel. The system is based on: 1) universal primers that amplifies a region of the nuclear 28s rDNA gene from both species and 2) a species-specific primer complementary to either zebra or quagga mussel. The species-specific primers bind to sequences between the binding sitesAuthorsM.S. Hoy, K. Kelly, R. J. RodriguezMolecular detection of native and invasive marine invertebrate larvae present in ballast and open water environmental samples collected in Puget Sound
Non-native marine species have been and continue to be introduced into Puget Sound via several vectors including ship's ballast water. Some non-native species become invasive and negatively impact native species or near shore habitats. We present a new methodology for the development and testing of taxon specific PCR primers designed to assess environmental samples of ocean water for the presenceAuthorsJ.B.J. Harvey, M.S. Hoy, R. J. RodriguezStress tolerance in plants via habitat-adapted symbiosis
We demonstrate that native grass species from coastal and geothermal habitats require symbiotic fungal endophytes for salt and heat tolerance, respectively. Symbiotically conferred stress tolerance is a habitat-specific phenomenon with geothermal endophytes conferring heat but not salt tolerance, and coastal endophytes conferring salt but not heat tolerance. The same fungal species isolated from pAuthorsR. J. Rodriguez, J. Henson, E. Van Volkenburgh, M. Hoy, L. Wright, F. Beckwith, Y.-O. Kim, R. S. Redman