Index Catalog // ScholarsArchive@OSU

Survey of Pathogens in Hatchery Chinook Salmon with Different Out-Migration Histories through the Snake and Columbia Rivers

Creator:: Van Gaest, Ahna L., Dietrich, Joseph P., Thompson, D. E., Boylen, Deborah A., Strickland, Stacy A., Collier, T. K., Loge, F. J., and Arkoosh, Mary R.
Abstract:: The operation of the Federal Columbia River Power System (FCRPS) has negatively affected threatened and endangered salmonid populations in the Pacific Northwest. Barging Snake River spring Chinook salmon Oncorhynchus tshawytscha through the FCRPS is one effort to mitigate the effect of the hydrosystem on juvenile salmon out-migration. However, little is...
Resource Type:: Article
Full Text:: for A. hydrophila or IPNV, 33.3% of the fish that tested positive for A. salmonicida or Y. ruckeri

Recruitment, Growth and Mortality of an Antarctic Hexactinellid Sponge, Anoxycalyx joubini

Creator:: Dayton, Paul K., Kim, Stacy, Jarrell, Shannon C., Oliver, John S., Hammerstrom, Kamille, Fisher, Jennifer L., O'Connor, Kevin, Barber, Julie S., Robilliard, Gordon, Barry, James, Thurber, Andrew R., and Conlan, Kathy
Abstract:: Polar ecosystems are sensitive to climate forcing, and we often lack baselines to evaluate changes. Here we report a nearly 50-year study in which a sudden shift in the population dynamics of an ecologically important, structure-forming hexactinellid sponge, Anoxycalyx joubini was observed. This is the largest Antarctic sponge, with individuals...
Resource Type:: Article
Full Text:: Antarctic Hexactinellid Sponge, Anoxycalyx joubini Paul K. Dayton1*, Stacy Kim2, Shannon C. Jarrell1, John S

Biological indicators of the timing and direction of warm-water advection during the 1997/1998 El Niño off the central Oregon coast, USA

Creator:: Keister, Julie E., Johnson, Travis B., Morgan, Cheryl A., and Peterson, William T.
Abstract:: Unusual collections of several euphausiid, chaetognath, and copepod species help elucidate the effects of the strong 1997/1998 El Niño off the central Oregon, USA, coast. Furcilia of Nyctiphanes simplex, a euphausiid typically found only as far north as central California, were collected in bi-weekly nearshore samples between December 1997 and...
Resource Type:: Article
Full Text:: 1998. Here we report on the occurrence of Nyctiphanes sim- plex in Oregon waters during the 1997/1998

Bias and Precision of Estimates from an Age-Structured Stock Assessment Program in Relation to Stock and Data Characteristics

Creator:: Yin, Yanshui and Sampson, David B.
Abstract:: Assessments for many U.S. Pacific coast groundfish stocks have been developed using the statistical catch-at-age method known as Stock Synthesis. This study used Monte Carlo simulation and a fractional factorial experiment to evaluate the effects of input data errors and stock characteristics on bias and precision in estimates of ending...
Resource Type:: Article
Full Text:: -age method known as Stock Synthesis. This study used Monte Carlo sim- ulation and a fractional

Food deprivation affects vertical distribution and activity of a marine fish in a thermal gradient: potential energy-conserving mechanisms

Creator:: Sogard, Susan M. and Olla, Bori L.
Abstract:: The effects of reduced food availability on the behavior of juvenile walleye pollock Theragra chalcogramma were examined in laboratory experiments designed to test for potential energy-conserving responses. Groups of juvenile fish were held on 1 of 6 ration treatments ranging from ad libitum to near starvation, and then vertical distribution...
Resource Type:: Article
Full Text:: entered into a computer as X, y coordinates. Positions were noted every min for 10 min, with 6 sets of

Seismic Evaluation, HMSC Office Building Newport, Oregon for Oregon Department of Fish & Wildlife

Creator:: Evans, John and Pillar Consulting Group, Inc.
Abstract:: The purpose of this memorandum is to provide a preliminary seismic assessment of the ODFW HMSC Office Building in Newport, OR. This report includes a description of the local seismic hazard, a description of the building’s lateral force resisting system, a description of the methods employed to evaluate the building,...
Resource Type:: Technical Report

2008/2009 Annual Report

Creator:: Hatfield Marine Science Center
Abstract:: Report year ends June 30.
Resource Type:: Other

The Gill Pathogen Dermocystidium salmonis in Oregon Salmonids

Creator:: Olson, Robert E. and Holt, Richard A.
Abstract:: 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 returning adult chinook salmon was monitored in several coastal Oregon stocks from 1989 to 1993. Although the prevalence of the...
Resource Type:: Article
Full Text:: , but their spores are morphologically sim- ilar to those of skin-infecting species, so they may also

2010/2011 Annual Report

Creator:: Hatfield Marine Science Center
Abstract:: Report year ends June 30
Resource Type:: Other

Controlled and in situ target strengths of the jumbo squid Dosidicus gigas and identification of potential acoustic scattering sources

Creator:: Benoit-Bird, Kelly J., Gilly, William F., and Au, Whitlow W. L.
Abstract:: This study presents the first target strength measurements of Dosidicus gigas, a large squid that is a key predator, a significant prey, and the target of an important fishery. Target strength of live, tethered squid was related to mantle length with values standardized to the length squared of −62.0, −67.4,...
Resource Type:: Article
Full Text:: of California has been estimated to be 210,000 tons /y �Sanchez-Juarez, 1991�. This figure

ScholarsArchive@OSU

Survey of Pathogens in Hatchery Chinook Salmon with Different Out-Migration Histories through the Snake and Columbia Rivers

Recruitment, Growth and Mortality of an Antarctic Hexactinellid Sponge, Anoxycalyx joubini

Biological indicators of the timing and direction of warm-water advection during the 1997/1998 El Niño off the central Oregon coast, USA

Bias and Precision of Estimates from an Age-Structured Stock Assessment Program in Relation to Stock and Data Characteristics

Food deprivation affects vertical distribution and activity of a marine fish in a thermal gradient: potential energy-conserving mechanisms

Seismic Evaluation, HMSC Office Building Newport, Oregon for Oregon Department of Fish & Wildlife

2008/2009 Annual Report

The Gill Pathogen Dermocystidium salmonis in Oregon Salmonids

2010/2011 Annual Report

Controlled and in situ target strengths of the jumbo squid Dosidicus gigas and identification of potential acoustic scattering sources

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