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Browsing Faculty and HMSC Affilliated Research Publications (Hatfield Marine Science Center) by Title

Browsing Faculty and HMSC Affilliated Research Publications (Hatfield Marine Science Center) by Title

Now showing items 68-87 of 165

Gear-Related Mortality in Selective Fisheries for Ocean Salmon

Lawson, Peter W.; Sampson, David B. (American Fisheries Society, 1996-08)

In ocean fisheries for Pacific salmon Oncorhynchus spp., there can be several forms of gear-related mortality. Much research effort has been directed at estimating mortality rates for salmon that are hooked and then rel ...
Genetic Analyses Provide Insight into the Early Ocean Stock Distribution and Survival of Juvenile Coho Salmon off the Coasts of Washington and Oregon

Van Doornik, Donald M.; Teel, David J.; Kuligowski, David R.; Morgan, Cheryl A.; Casillas, Emundo (American Fisheries Society, 2007-02)

Estimating the stock proportions of mixed-stock fishery samples by means of genetic stock identification has played an important role in the management of salmon fisheries. In addition, stock identification of individual ...
Ghana Artisanal Marine Sector Case Study Results: Ghana Fisheries and Seafood Bio-economic Assessment Model Project

SylDon Inc. (New Partnership for Africa's Development, 2011-06)

This report was prepared under guidance from Gilbert Sylvia, Ph.D. Dr. Sylvia is president of SylDon Inc. located in Newport, Oregon and also Superintendent of the Coastal Oregon Marine Experiment Station, Oregon State ...
The Gill Pathogen Dermocystidium salmonis in Oregon Salmonids

Olson, Robert E.; Holt, Richard A. (American Fisheries Society, 1995-06)

Intense infections of the gill pathogen Dermocystidium salmonis were associated with mortality of prespawning chinook salmon Oncorhynchus tshawytscha in several Oregon rivers in 1988. The occurrence of the pathogen in re ...
Growth and behavioral responses to elevated temperatures by juvenile sablefish Anoplopoma fimbria and the interactive role of food availability

Sogard, Susan M.; Olla, Bori L. (Inter-Research, 2001-07-31)

Larval and age-0 sablefish Anoplopoma fimbria reside in neustonic waters of the North Pacific during spring and summer. We estimated the potential impacts of elevated surface temperatures on ecological processes of growt ...
Growth, survival, and habitat use of naturally reared and hatchery steelhead fry in streams: effects of an enriched hatchery rearing environment

Tatara, Christopher P.; Riley, Stephen C.; Scheurer, Julie A. (American Fisheries Society, 2009-05)

After hatchery-reared salmonids are released into the wild, their survival and performance are frequently lower than those of wild conspecifics. Additionally, negative effects of hatchery fish on wild fish are cited as ...
Hatfield Marine Science Center: Magic Planet Installation Evaluation Findings August, 2010

Rowe, Shawn; Stofer, Katie; Barthel, Celeste; Hunter, Nancee (2011-07-14)

In 2008, Oregon Sea Grant (OSG) was awarded a NOAA Environmental Literacy grant to install, test, and develop evaluation rubrics for a Magic Planet spherical display system (http://www.globalimagination. com/ ). The ...
Hydroacoustic monitoring of oceanic spreading centers: Past, present, and future

Dziak, Robert P.; Bohnenstiehl, Delwayne R.; Smith, Deborah K. (The Oceanography Society, 2012-03)

Mid-ocean ridge volcanism and extensional faulting are the fundamental processes that lead to the creation and rifting of oceanic crust, yet these events go largely undetected in the deep ocean. Currently, the only means ...
Hydrothermal activity in the Northwest Lau Backarc Basin: Evidence from water column measurements

Lupton, J. E.; Arculus, R. J.; Resing, J.; Massoth, G. J.; Greene, R. R.; Evans, L. J.; Buck, N. (American Geophysical Union, 2012-05-31)

The Northwest Lau Backarc Basin, consisting of the Northwest Lau Spreading Center (NWLSC) and the Rochambeau Rifts (RR), is unique in having elevated ³He/⁴He ratios (up to 28 R[subscript a]) in the erupted lavas, clearly ...
Hydrothermal Discharge During Submarine Eruptions

Baker, Edward T.; Chadwick, Wi l l iam W. Jr.; Cowen, James P.; Dziak, Robert P.; Rubin, Kenneth H.; Fornari, Daniel J. (Oceanography Society, 2012-03)

Submarine volcanic eruptions and intrusions construct new oceanic crust and build long chains of volcanic islands and vast submarine plateaus. Magmatic events are a primary agent for the transfer of heat, chemicals, and ...
Increased Susceptibility of Juvenile Chinook Salmon to Vibriosis after Exposure to Chlorinated and Aromatic Compounds Found in Contaminated Urban Estuaries

Arkoosh, Mary R.; Clemons, Ethan; Huffman, Paul; Kagley, Anna N.; Casillas, Edmundo; Adams, Nick; Sanborn, Herb R.; Collier, Tracy K.; Stein, John E. (American Fisheries Society, 2001-09)

Saltwater-adapted juvenile chinook salmon Oncorhynchus tshawytscha exposed to aromatic and chlorinated compounds, representative of contaminants found in urban estuaries in Puget Sound, have a higher susceptibility to vi ...
Increases in jellyfish biomass in the Bering Sea: implications for the ecosystem

Brodeur, Richard D.; Sugisaki, Hiroya; Hunt Jr., George L. (Inter-Research, 2002-05-21)

There has been a dramatic increase in jellyfish biomass over the eastern Bering Sea shelf since the early 1990s, which was previously hypothesized to have been triggered by changing climate and ocean conditions. We exami ...
Infectivity of a rickettsia isolated from coho salmon Oncorhynchus kisutch

Garces, L.H.; Larenas, J.J.; Smith, P.A.; Sandino, S.; Lannan, C.N.; Fryer, J.L. (Inter-Research, 1991-08-08)

Two species of salmonids were tested for their susceptibility to infection by a rickettsia isolated in cell culture from diseased coho salmon Oncorhynchus kisutch in Chile. Mortality approached 100% in coho and Atlantic ...
Integrating fish and parasite data as a holistic solution for identifying the elusive stock structure of Pacific sardines (Sardinops sagax)

Baldwin, Rebecca E. B.; Banks, Michael A.; Jacobson, Kym C. (Springer, 2011-06-29)

There is an urgent need to clarify how different stocks, or subpopulations of fish species, are vulnerable to fishing pressure and unfavorable ocean conditions because of the increasing demand on fisheries for human cons ...
Interannual variability in the Northern California Current food web structure: Changes in energy flow pathways and the role of forage fish, euphausiids, and jellyfish

Ruzicka, James J.; Brodeur, Richard D.; Emmett, Robert L.; Steele, John H.; Zamon, Jeannette E.; Morgan, Cheryl A.; Thomas, Andrew C.; Wainwright, Thomas C. (Elsevier, 2012-09)

The Northern California Current (NCC) is a seasonally productive and open ecosystem. It is home to both a diverse endemic community and to seasonally transient species. Productivity and food web structure vary seasonally ...
Interannual Variation in Diet and Condition in Juvenile Bluefish during Estuarine Residency

Friedland, K.D.; Garman, G.C.; Bejda, A.J.; Studholme, A.L.; Olla, B.L. (American Fisheries Society, 1988-09)

We examined the diets and weight-length relationships of juvenile bluefish Pomatomus saltatrix from Sandy Hook Bay, New Jersey, during 1981, 1983, and 1984. Diets consisted of a variety of polychaete, crustacean, and fi ...
An introduced Asian parasite threatens northeastern Pacific estuarine ecosystems

Chapman, John W.; Dumbauld, Brett R.; Itani, Gyo; Markham, John C. (Springer, 2012-06)

The introduced Asian parasitic bopyrid isopod, Orthione griffenis, was first discovered on the Pacific coast of North America in Washington in 1988 and next in California in 1992. The range of Orthione presently extends ...
Investigation of shark attack on Kenneth Doudt at Cannon Beach

Link, Terry (Oregon Department of Fish and WIldlife, 1979)

This three page report details a shark attack on a surfer that tooks place on November 27, 1979 off Cannon Beach, Oregon. The bite marks on the surfboard are detailed including x-rays showing the teeth marks.
Is there a common response to ultraviolet-B radiation by marine phytoplankton?

Behrenfeld, Michael J.; Chapman, John W.; Hardy, John T.; Lee II, Henry (Inter Research, 1993-12-09)

Global increases in ultraviolet-B radiation (UVBR) have the potential to alter marine primary production and to affect carbon cycles and marine trophic dynamics. Estimates of UVBR induced photoinhibition have varied grea ...
Juvenile Salmonid Use of Freshwater Emergent Wetlands in the Floodplain and Its Implications for Conservation Management

Henning, Julie A.; Gresswell, Robert E.; Fleming, Ian A. (American Fisheries Society, 2006-05)

A recent trend of enhancing freshwater emergent wetlands for waterfowl and other wildlife has raised concern about the effects of such measures on juvenile salmonids. We undertook this study to quantify the degree and ex ...