Marrowstone Marine Field Station (MMFS)

Publications

Below is a list of available MMFS peer reviewed and published science.

Filter Total Items: 67
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Year Published: 2021

Long-term shedding from fully convalesced individuals indicates that Pacific herring are a reservoir for viral hemorrhagic septicemia virus

Processes that allow viral hemorrhagic septicemia (VHS) virus to persist in the marine environment remain enigmatic, owing largely to the presence of covert and cryptic infections in marine fishes during typical sub-epizootic periods. As such, marine host reservoirs for VHS virus have not been fully demonstrated, nor have the mechanism(s) by which...

Hershberger, Paul; Mackenzie, Ashley; Gregg, Jacob L.; Wilmot, M. D.; Powers, Rachel L.; Purcell, Maureen K.

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Year Published: 2021

Differential susceptibility of Yukon River and Salish Sea stocks of Chinook salmon Oncorhynchus tshawytscha to ichthyophoniasis

Preliminary evidence suggests that Chinook salmon Oncorhynchus tshawytscha from the Yukon River may be more susceptible to Ichthyophonus sp. infections than Chinook from stocks further south. To investigate this hypothesis in a controlled environment, we experimentally challenged juvenile Chinook from the Yukon River and from...

Elliott, Diane G.; Conway, Carla M.; McKibben, Constance L.; Mackenzie, Ashley; Hart, Lucas M.; Groner, Maya; Purcell, Maureen K.; Gregg, Jacob L.; Hershberger, Paul

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Year Published: 2021

Novel diagnostic tests for the putative agent of bacterial gill disease in Pacific razor clams (Siliqua patula)

Nuclear inclusion X (NIX) is a gamma proteobacteria that infects the nuclei of gill epithelial cells in Pacific razor clams. NIX has been associated with clam die-offs in coastal Washington. A quantitative PCR (qPCR) assay was developed to detect NIX in Pacific razor clams, and assay specificity was confirmed by chromogenic in situ...

Travis, Brooke A; Batts, William N.; Groner, Maya; Hershberger, Paul; Fradkin, Steven C.; Conway, Carla M.; Park, Linda; Purcell, Maureen K.

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Year Published: 2020

Anadromous coastal cutthroat trout Oncorhynchus clarkii clarkii as a host for Argulus pugettensis (Crustacea, Branchiura): Parasite prevalence, intensity and distribution

Coastal cutthroat trout [Oncorhynchus clarkii clarkii (Richardson, 1836)] from the marine waters of Puget Sound, WA, was documented as a new host for the ectoparasite Argulus pugettensis (Dana, 1852). The prevalence of A. pugettensis was 66% (49 of 74) on cutthroat trout and 0% (0 of 55) on coho salmon [O. kisutch (...

Losee, James P; Jones, Simon R M; McKinstry, Caitlin A E; Batts, William N.; Hershberger, Paul

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Year Published: 2020

Pacific herring Clupea pallasii are not susceptible to vibriosis from Vibrio anguillarum or V. ordalii under laboratory conditions

The ubiquity of Vibrio spp. throughout the coastal marine waters of the Pacific Northwest of North America raises questions about the susceptibility of native marine fishes, including Pacific herring (Clupea pallasii). Early reports of Vibriolike disease (Rucker et al., 1954; Walford, 1958) and Vibrio sp. isolations (Pacha & Kiehn, 1969) in...

Hershberger, Paul; Stinson, M.E.T; Hall, Brenda L; Mackenzie, Ashley; Gregg, Jacob L.; Richards, William August; Winton, James

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Year Published: 2020

Herring Disease Program II 19120111-E - 2019 Annual Report

We will investigate fish health factors that may be contributing to the failed recovery of Pacific herring populations in Prince William Sound. Field samples will provide infection and disease prevalence data from Prince William Sound and Sitka Sound that will inform the ASA model, serological data that will indicate the prior exposure history and...

Hershberger, Paul; Purcell, Maureen K.
Hershberger, P., and M. Purcell. 2020. Herring Disease Program II - 2019 Annual Report. EVOSTC Annual Project Report. Project Number 19120111-E. 10 p.

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Year Published: 2020

Climate change can drive marine diseases

As an ultimate driver of marine ecosystem processes, climate change is expected to influence proximate disease drivers in marine systems. The observable effects of climate change, including changes in temperature, hypoxia, CO2 accumulation, precipitation, and storm and cyclone frequencies and intensities, may directly act as proximate drivers...

Burge Colleen A; Hershberger, Paul

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Year Published: 2020

Ichthyophonus sp. Infection in Opaleye (Girella nigricans)

Over a 3-year-period, 17 wild-caught opaleye (Girella nigricans) housed in a public display aquarium were found dead without premonitory signs. Grossly, 4 animals had pinpoint brown or black foci on coelomic adipose tissue. Histologically, liver, spleen, heart, and posterior kidney had mesomycetozoan granulomas in all cases; other organs were less...

LaDouceur, Elise E. B; St. Leger, Judy; Mena, Alexandria; Mackenzie, Ashley; Gregg, Jacob; Purcell, Maureen K.; Batts, William N.; Hershberger, Paul

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Year Published: 2020

Modeling pathogen dispersal in marine fish and shellfish

Bio-physical models are a useful tool for understanding dispersal and transmission of marine pathogens. While utilized for larval dispersal models, they are only recently being used in epidemiological studies and are currently underutilized by the marine epidemiology field. Bio-physical models are useful for spatial planning and coastal...

Cantrell, Danielle L; Groner, Maya L.; Ben-Horin, Tal; Grant, Jon; Revie, Crawford W.

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Year Published: 2019

A geographic hot spot of Ichthyophonus infection in the southern Salish Sea, USA

The prevalence of Ichthyophonus infection in Pacific herring Clupea pallasii was spatially heterogeneous in the southern Salish Sea, Washington State, USA. Over the course of 13 mo, 2232 Pacific herring were sampled from 38 midwater trawls throughout the region. Fork length was positively correlated with Ichthyophonus infection at all sites. After...

Hershberger, Paul; Mackenzie, Ashley; Gregg, Jacob; Lindquist, A; Sandell, T; Groner, Maya L.; Lowry, D

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Year Published: 2019

Evaluating the potential for sea lice to evolve freshwater tolerance as a consequence of freshwater treatments in salmon aquaculture

Increasing usage of non-medicinal methods (NMMs) to control sea louse infestations on salmon farms has raised questions about whether sea lice may be able to evolve tolerance of NMMs. Of particular concern is the potential for sea lice to evolve freshwater tolerance as a result of freshwater treatments. Wild trout and some juvenile salmonids swim...

Groner, Maya; Laurin, Emilie; Stormoen, Marit; Sanchez, Javier; Fast, Mark D; Revie, Crawford W.

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Year Published: 2019

Intra‐Annual Changes in Waterborne Nanophyetus salmincola

An analysis of daily water samples collected from an index site on Big Soos Creek, Washington indicated intra‐annual differences in the concentrations of waterborne Nanophyetus salmincola. Waterborne concentrations, quantified as gene copies/L, peaked during the fall (October–November 2016), decreased to very low concentrations over the winter (...

Hershberger, Paul; Powers, Rachel; Besijn, Bonnie L; Rankin, J.; Wilson, Mark A.; Antipa, B; Bjelland, J; Mackenzie, Ashley; Gregg, Jacob; Purcell, Maureen