Search

Your search keyword '"Dumbauld, Brett"' showing total 149 results
Start Over Author "Dumbauld, Brett"
149 results on '"Dumbauld, Brett"'

1. Efficacy, non-target impacts, and costs of mechanical control options against a bioturbator in bivalve aquaculture

Author

Ruesink, Jennifer L., Mawson, C. Haleh, Allen, Brian, Barrett, Jeffrey, Beugli, David, Booth, Steven, Butler, Laura, Dewey, Bill, Donoghue, Cinde R., Dumbauld, Brett R., Feldman, Kristine, Forster, Zachary, Garcia, S. Maria, Gross, Jackson A., Hudson, Bobbi, Hull, Wesley W., Iyer, Vikram, Katla, Aspen, Kraft, Laura, Paul, Blair, Pruitt, Casey B., Vashisth, Aniruddh, and Patten, Kim D.

Published
2025
Full Text
View/download PDF

5. A COMPARISON OF THE JUVENILE DUNGENESS CRAB METACARCINUS MAGISTER HABITAT PROVIDED BY CONTEMPORARY OYSTER AQUACULTURE VERSUS HISTORICAL NATIVE OYSTERS IN A U.S. WEST COAST ESTUARY

Author

Dumbauld, Brett R., Murphy, Jessica R., Mccoy, Lee, and Lewis, Nathaniel S.

Subjects
United States. National Oceanic and Atmospheric Administration -- Analysis, Tide pool ecology -- Usage -- Analysis, Estuaries -- Analysis -- Usage, Fish-culture -- Analysis -- Usage, Coastal ecosystems -- Usage -- Analysis, Aquaculture industry -- Analysis -- Usage, Crassostrea -- Usage, Aquaculture -- Analysis -- Usage, Seafood industry -- Usage, Geospatial data -- Usage -- Analysis, Oysters -- Usage, Biological sciences, Zoology and wildlife conservation, Oregon State University
Abstract

Oysters and seagrasses provide structurally complex estuarine habitat for fish and invertebrate species. On the U.S. West Coast, complex oyster habitat was historically provided by the native Olympia oyster Oslrea lurida but is now provided by the commercially cultured oyster Crassoslrea gigas. Ostrea lurida is found in subtidal and low intertidal areas, whereas C. gigas is predominantly cultured at higher intertidal elevations, resulting in a potential shift in available habitat for other fish and invertebrates that use this intertidal habitat. This change in the available habitat and its use was examined for the juvenile Dungeness crab Metacarcinus magister, and results showed the following: (1) comparable crab densities in remnant and restored populations of O. lurida and cultured C. gigas in two estuaries, (2) generally higher crab densities in both of these shell habitats than those observed in eelgrass Zostera marina or open mud habitat, (3) contemporary juvenile crab density in intertidal areas of Willapa Bay was most influenced by distance from the estuary mouth (declining with increasing distance) but also declined with increasing tidal elevation, and (4) when extrapolated to the estuarine ecosystem scale using areal estimates of habitat coverage, historical habitat provided by O. lurida potentially produced three times more juvenile crabs than those currently produced in cultured C. gigas. Nonetheless, both intertidal oyster habitats contribute more to juvenile crab production than eelgrass or open unstructured mud, and the ecosystem services associated with the placement of native and commercial oyster beds should be considered when defining goals for and permitting both aquaculture and native oyster restoration in Willapa Bay and other U.S. West Coast estuaries. Managers should consider this shifting temporal baseline in intertidal habitat provision, but also conducting similar evaluations at this broader estuary scale when evaluating habitat value for other resources that use these habitats differently. KEY WORDS: Dungeness crab, Metacarcinus magister, Ostrea lurida, Crassoslrea gigas, habitat, eelgrass, recruitment, INTRODUCTION Structured estuarine habitats including seagrass and oyster reefs are widely recognized to provide valuable refuge and food to a wide variety of organisms including commercially important fish and invertebrates [...]

Published
2021
Full Text
View/download PDF

29. The Willapa Bay oyster reserves in Washington state: fishery collapse, creating a sustainable replacement, and the potential for habitat conservation and restoration

Author

Dumbauld, Brett R., Kauffman, Bruce E., Trimble, Alan C., and Ruesink, Jennifer L.

Subjects
Willapa Bay -- Natural resources, Marine resources conservation -- Methods -- Protection and preservation, Fishery conservation -- Methods -- Protection and preservation, Crassostrea -- Protection and preservation -- Methods, Fishery management -- Methods -- Protection and preservation, Oysters -- Protection and preservation -- Methods, Biological sciences, Zoology and wildlife conservation
Abstract

ABSTRACT Oysters have been an important resource in Washington state since the mid 1800s and are intimately associated with recent history of the Willapa Bay estuary, just as they have [...]

Published
2011
Full Text
View/download PDF

31. Oysters and aquaculture practices affect eelgrass density and productivity in a Pacific Northwest estuary

Author

Tallis, Heather M., Ruesink, Jennifer L., Dumbauld, Brett, Hacker, Sally, and Wisehart, Lorena M.

Subjects
Oyster-culture -- Environmental aspects -- Research, Growth (Plants) -- Research -- Environmental aspects, Biological sciences, Zoology and wildlife conservation, Research, Environmental aspects
Abstract

ABSTRACT The presence of bivalves and bivalve aquaculture can have positive and negative impacts on seagrass and associated benthic communities. Some oyster (Crassostrea gigas) aquaculture methods recently have been restricted [...]

Published
2009

32. Factors preventing the recovery of a historically overexploited shellfish species, Ostrea lurida Carpenter 1864

Author

Trimble, Alan C., Ruesink, Jennifer L., and Dumbauld, Brett R.

Subjects
Willapa Bay -- Natural resources, Wildlife habitat improvement -- Methods -- Research, Shellfish fisheries -- Management -- History -- Research -- Methods, Oysters -- Management -- History -- Research -- Methods, Biological sciences, Zoology and wildlife conservation, Company business management, Management, Research, Natural resources, History, Methods
Abstract

ABSTRACT The Olympia oyster, Ostrea lurida Carpenter 1864, (†) in estuaries along the Pacific coast of North America, experienced overexploitation throughout its range in the late 1800s, resulting in commercial [...]

Published
2009

37. Differential Mortality and High Viral Load in Naive Pacific Oyster Families Exposed to OsHV-1 Suggests Tolerance Rather than Resistance to Infection

Author

Agnew, M. Victoria, Friedman, Carolyn S., Langdon, Christopher, Divilov, Konstantin, Schoolfield, Blaine, Morga, Benjamin, Degremont, Lionel, Dhar, Arun K., Kirkland, Peter, Dumbauld, Brett, Burge, Colleen A., Agnew, M. Victoria, Friedman, Carolyn S., Langdon, Christopher, Divilov, Konstantin, Schoolfield, Blaine, Morga, Benjamin, Degremont, Lionel, Dhar, Arun K., Kirkland, Peter, Dumbauld, Brett, and Burge, Colleen A.

Abstract

Pacific oysters, Crassostrea gigas, are one of the most productive aquaculture species in the world. However, they are threatened by the spread of Ostreid herpesvirus-1 (OsHV-1) and its microvariants (collectively “µvars”), which cause mass mortalities in all life stages of Pacific oysters globally. Breeding programs have been successful in reducing mortality due to OsHV-1 variants following viral outbreaks; however, an OsHV-1-resistant oyster line does not yet exist in the United States (US), and it is unknown how OsHV-1 µvars will affect US oyster populations compared to the current variant, which is similar to the OsHV-1 reference, found in Tomales Bay, CA. The goals of this study were to investigate the resistance of C. gigas juveniles produced by the Molluscan Broodstock Program (MBP) to three variants of OsHV-1: a California reference OsHV-1, an Australian µvar, and a French µvar. This is the first study to directly compare OsHV-1 µvars to a non-µvar. The survival probability of oysters exposed to the French (FRA) or Australian (AUS) µvar was significantly lower (43% and 71%, respectively) than to the reference variant and controls (96%). No oyster family demonstrated resistance to all three OsHV-1 variants, and many surviving oysters contained high copy numbers of viral DNA (mean ~3.53 × 108). These results indicate that the introduction of OsHV-1 µvars could have substantial effects on US Pacific oyster aquaculture if truly resistant lines are not achieved, and highlight the need to consider resistance to infection in addition to survival as traits in breeding programs to reduce the risk of the spread of OsHV-1 variants

Published
2020
Full Text
View/download PDF

38. On the edge: assessing fish habitat use across the boundary between Pacific oyster aquaculture and eelgrass in Willapa Bay, Washington, USA

Author

Department of Agriculture (US), National Oceanic and Atmospheric Administration (US), Agricultural Research Foundation, Oregon State University, Muething, Kelly A., Tomàs, Fiona, Waldbusser, George, Dumbauld, Brett R., Department of Agriculture (US), National Oceanic and Atmospheric Administration (US), Agricultural Research Foundation, Oregon State University, Muething, Kelly A., Tomàs, Fiona, Waldbusser, George, and Dumbauld, Brett R.

Abstract

Estuaries are subject to diverse anthropogenic stressors, such as shellfish aquaculture, which involve extensive use of estuarine tidelands. Pacific oyster Crassostrea gigas aquaculture is a century-old practice in US West Coast estuaries that contributes significantly to the regional culture and economy. Native eelgrass Zostera marina also commonly occurs in intertidal areas where oyster aquaculture is practiced. Eelgrass is federally protected in the USA as ‘essential fish habitat’, restricting aquaculture activities within or near eelgrass. To contribute scientific information useful for management decisions, we sought to compare fish habitat use of oyster aquaculture and eelgrass, as well as the edges between these 2 habitats, in Willapa Bay, Washington, USA. Furthermore, given a recent shift towards off-bottom culture methods, in part to protect seagrasses, long-line and on-bottom oyster aquaculture habitats were compared. A combination of direct (underwater video, minnow traps) and indirect (predation tethering units, eelgrass surveys) methods were employed to characterize differences in fish habitat use. Eelgrass density declined within both aquaculture habitats but less so within long-line aquaculture. Most fish species in our study used long-line oyster aquaculture and eelgrass habitats similarly with minimal edge effects, and on-bottom aquaculture was used less than either of the other 2 habitat types. These results are consistent with previously observed positive relationships between fish abundance and vertical habitat structure, but also reveal species-specific behavior; larger mesopredators like Pacific staghorn sculpins were sighted more often in aquaculture than in interior eelgrass habitats.

Published
2020

40. Differential Mortality and High Viral Load in Naive Pacific Oyster Families Exposed to OsHV-1 Suggests Tolerance Rather than Resistance to Infection

Author

Agnew, M. Victoria, primary, Friedman, Carolyn S., additional, Langdon, Christopher, additional, Divilov, Konstantin, additional, Schoolfield, Blaine, additional, Morga, Benjamin, additional, Degremont, Lionel, additional, Dhar, Arun K., additional, Kirkland, Peter, additional, Dumbauld, Brett, additional, and Burge, Colleen A., additional

Published
2020
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results