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A New Record of Planktic Foraminifera Community Response to Marine Heatwaves in the Northeast Pacific

Creator:: M. Kelsey Lane
Abstract:: Marine heat waves are forecasted to increase in frequency and intensity under future climate scenarios, but little is known about the impact of these events on the one of the most commonly used proxies of ocean temperature - foraminiferal assemblages. This research explores the planktic foraminifera community along the Newport...
Resource Type:: Masters Thesis
Full Text:: THESIS OF M. Kelsey Lane for the degree of Master of Science in Marine Resource Management presented

Distribution and community structure of ichthyoplankton off the coast of Oregon, USA, in 2000 and 2002

Creator:: Auth, Toby D. and Brodeur, Richard D.
Abstract:: The species composition, distribution and concentration of ichthyoplankton off the central Oregon coast in the NE Pacific Ocean were examined during 2000 and 2002 to investigate annual, seasonal, vertical, and cross-shelf variability. Larval concentrations were also analyzed in relation to water temperature and salinity. The 281 samples collected from 5...
Resource Type:: Article
Full Text:: (151.2 per 1000 m3). Rela- tively few larvae were found at depths >100 m, while highest larval

Integration of submersible transect data and high-resolution multibeam sonar imagery for a habitat-based groundfish assessment of Heceta Bank, Oregon

Creator:: Nasby-Lucas, Nicole M., Embley, Bob W., Hixon, Mark A., Merle, Susan G., Tissot, Brian N., and Wright, Dawn J.
Abstract:: In the face of dramatic declines in groundfish populations and a lack of sufficient stock assessment information, a need has arisen for new methods of assessing groundfish populations. We describe the integration of seafloor transect data gathered by a manned submersible with high-resolution sonar imagery to produce a habitat- based...
Resource Type:: Article
Full Text:: assessment of Heceta Bank, Oregon* Nicole M. Nasby-Lucas Pfl eger Institute of Environmental Research 901-B

Fishery-specific solutions to seabird bycatch in the U.S. West Coast sablefish fishery

Creator:: Good, Thomas P., Jannot, Jason E., Melvin, Edward F., Gladics, Amanda J., Suryan, Robert M., and Guy, Troy J.
Abstract:: Bird scaring lines (BSLs) protect longline fishing gear from seabird attacks, save bait, reduce incidental seabird mortality and are the most commonly prescribed seabird bycatch mitigation measure worldwide. We collaborated with fishermen to assess the efficacy of applying BSL regulations from the demersal longline sablefish fishery in Alaska to a...
Resource Type:: Article
Full Text:: . Melvinb, Robert M. Suryana,1, Thomas P. Goodc, Jason E. Jannotd, Troy J. Guyb a Department of Fisheries

Effects of physical factors on the vertical distribution of larval walleye pollock Theragra chalcogramma under controlled laboratory conditions

Creator:: Olla, Bori L. and Davis, Michael W.
Abstract:: This study examined, under controlled laboratory conditions, behavioral responses of larval walleye pollock (4 to 8 mm) to various physical factors that may potentially play a role in vertical movements and distribution. Diel periodicity in vertical distribution was evident and appeared to be under exogenous control. During the day, with...
Resource Type:: Article
Full Text:: Clarke, M. E. (1984). Feeding behavior of larval walleye pollock, Theragra clialcograrnma (Pallas) and

Onshore-offshore variations in copepod community structure off the Oregon coast during the summer upwelling season

Creator:: Morgan, Cheryl A., Peterson, William T., and Emmett, Robert L.
Abstract:: During the summer of 1994, 1996, and 1997, we conducted hydrographic and plankton surveys of the upper 70 m in the nearshore, the continental shelf, and off shelf oceanic waters off Oregon, USA. Copepod densities and biomass were estimated along 4 transects from each cruise. The on shelf copepod biomass...
Resource Type:: Article
Full Text:: hydrographic and plankton surveys of the upper 70 m in the nearshore, the continental shelf, and off-shelf

Analysis of the Spring-Fall Epipelagic Ichthyoplankton Community in the Northern California Current in 2004-2009 and its Relation to Environmental Factors

Creator:: Auth, Toby D.
Abstract:: The taxonomic composition, distribution, concentration, and community structure of ichthyoplankton off the Oregon and Washington coasts were examined in 2004-2009 to investigate annual, seasonal, latitudinal, and cross-shelf variability. Larval concentrations and community structure were also analyzed in relation to several local and larger-scale environmental variables. The dominant taxa, comprising 94%...
Resource Type:: Article
Full Text:: - ties on fourth root-transformed larval fish concentra- tions (Clarke and Warwick 2001). Larval

Ontogenetic shifts in diets of juvenile and subadult coho and chinook salmon in coastal marine waters: important for marine survival?

Creator:: Daly, Elizabeth A., Brodeur, Richard D., and Weitkamp, Laurie A.
Abstract:: Successfully shifting to a more piscivorous diet may be an important factor in the growth and survival of juvenile coho salmon Oncorhynchus kisutch and Chinook salmon O. tshawytscha during their first summer in the northern California Current. Nonmetric multidimensional scaling and cluster analysis of diets by size showed several distinct...
Resource Type:: Article
Full Text:: (Figure 1; Fisher et al. 2007). The rope trawl, with a mouth opening 20 m deep and 30 m wide, was towed

Spatial and trophic overlap of marked and unmarked Columbia River Basin spring Chinook salmon during early marine residence with implications for competition between hatchery and naturally produced fish

Creator:: Daly, Elizabeth A., Brodeur, Richard D., Fisher, Joseph P., Weitkamp, Laurie A., Teel, David J., and Beckman, Brian R.
Abstract:: Ecological interactions between natural and hatchery juvenile salmon during their early marine residence, a time of high mortality, have received little attention. These interactions may negatively influence survival and hamper the ability of natural populations to recover. We examined the spatial distributions and size differences of both marked (hatchery) and...
Resource Type:: Article
Full Text:: were collected using a Nordic 264 pelagic rope trawl, which has a mouth opening 30 m wide by 20 m deep

Marine distributions of chinook salmon from the West Coast of North America determined by coded wire tag recoveries

Creator:: Weitkamp, Laurie A.
Abstract:: The coded wire tag (CWT) database contains detailed information on millions of Pacific salmon Oncorhynchus spp. released from hatcheries or smolt traps and recovered in the north Pacific Ocean and its tributaries. I used this data set to examine the spatial and temporal variation in the marine distributions of 77...
Resource Type:: Article
Full Text:: ) cluster analysis. All analyses were run using PRIMER-E software (Clarke and Gorley 2006). These analyses

ScholarsArchive@OSU

A New Record of Planktic Foraminifera Community Response to Marine Heatwaves in the Northeast Pacific

Distribution and community structure of ichthyoplankton off the coast of Oregon, USA, in 2000 and 2002

Integration of submersible transect data and high-resolution multibeam sonar imagery for a habitat-based groundfish assessment of Heceta Bank, Oregon

Fishery-specific solutions to seabird bycatch in the U.S. West Coast sablefish fishery

Effects of physical factors on the vertical distribution of larval walleye pollock Theragra chalcogramma under controlled laboratory conditions

Onshore-offshore variations in copepod community structure off the Oregon coast during the summer upwelling season

Analysis of the Spring-Fall Epipelagic Ichthyoplankton Community in the Northern California Current in 2004-2009 and its Relation to Environmental Factors

Ontogenetic shifts in diets of juvenile and subadult coho and chinook salmon in coastal marine waters: important for marine survival?

Spatial and trophic overlap of marked and unmarked Columbia River Basin spring Chinook salmon during early marine residence with implications for competition between hatchery and naturally produced fish

Marine distributions of chinook salmon from the West Coast of North America determined by coded wire tag recoveries

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