Index Catalog // ScholarsArchive@OSU

Marine environment-based forecasting of coho salmon (Oncorhynchus kisutch) adult recruitment

Creator:: Rupp, David E., Wainwright, Thomas C., Lawson, Peter W., and Peterson, William T.
Abstract:: Generalized additive models (GAMs) were used to investigate the relationships between annual recruitment of natural coho salmon (Oncorhynchus kisutch) from Oregon coastal rivers and indices of the physical ocean environment. Nine indices were examined, ranging from large-scale ocean indicators, e.g., Pacific Decadal Oscillation (PDO), to indicators of the local ecosystem...
Resource Type:: Article
Full Text:: power and promising forecast skill resulted when the spring ⁄ summer PDO averaged over the 4 yr prior to

Responses in growth rate of larval northern anchovy (Engraulis mordax) to anomalous upwelling in the northern California Current

Creator:: Takahashi, Motomitsu, Checkley, David M., Jr., Litz, Marisa N. C., Brodeur, Richard D., and Peterson, William T.
Abstract:: We examined variability in growth rate during the larval stage of northern anchovy (Engraulis mordax) in response to physical and biological environmental factors in 2005 and 2006. The onset of spring upwelling was anomalously delayed by 2–3 months until mid-July in 2005; in contrast, spring upwelling in 2006 began as...
Resource Type:: Article
Full Text:: , consequently, reduced E. mordax larval growth rate in early summer, but once upwelling began in July, high food

The relationships between predatory fish, forage fishes, and juvenile salmonid marine survival off the Columbia River: a simple trophic model analysis

Creator:: Emmett, Robert L. and Sampson, David B.
Abstract:: A trophic model that simulates interactions between a predatory fish (Pacific hake, Merluccius productus), forage fish, and juvenile salmon off the Columbia River was constructed to identify if trophic interactions could account for marine mortality of Columbia River juvenile salmon. The model estimates the number of juvenile salmon that are...
Resource Type:: Research Paper
Full Text:: summer Chinook salmon. For these two stocks, average May/June sea-surface temperature was the best predic

Influence of Regional Oceanography on the Distributions, Trophic Interactions, Growth, and Survival of the Early Life History Stages of Fishes

Creator:: Swieca, Kelsey
Abstract:: Most marine fishes experience high rates of mortality during their early life history stages with far reaching consequences for adult population dynamics. Within a few weeks of hatching, relatively small changes in larval growth and mortality rates can lead to orders of magnitude variability in year-class strength. Growth and survival...
Resource Type:: Dissertation
Full Text:: the location of the summer upwelling front. When the front was restricted nearshore, inshore larval

Multivariate Models of Adult Pacific Salmon Returns

Creator:: Burke, Brian J., Peterson, William T., Beckman, Brian R., Morgan, Cheryl, Daly, Elizabeth A., and Litz, Marisa
Abstract:: Most modeling and statistical approaches encourage simplicity, yet ecological processes are often complex, as they are influenced by numerous dynamic environmental and biological factors. Pacific salmon abundance has been highly variable over the last few decades and most forecasting models have proven inadequate, primarily because of a lack of understanding...
Resource Type:: Article
Full Text:: surveys conducted during their first summer at sea. However, we know that many other ecological

Defining marine habitat of juvenile Chinook salmon, Oncorhynchus tshawytscha, and coho salmon, O. kisutch, in the northern California Current System

Creator:: Pool, Suzan S., Reese, Douglas C., and Brodeur, Richard D.
Abstract:: We investigated habitat use by juvenile Chinook salmon (Oncorhynchus tshawytscha) and coho salmon (O. kisutch) to identify environmental characteristics that may define their optimal marine habitat. We utilized physical and biological data from four cruises in the northern California Current system from Newport, Oregon, to Crescent City, California, in June...
Resource Type:: Article
Full Text:: the Oregon coast during the entire summer (Pearcy and Fisher 1988; Peterson et al. 2010). Indeed

Uncertainty and Precautionary Management of Marine Fisheries: Can the Old Methods Fit the New Mandates?

Creator:: Weeks, Hal and Berkeley, Steve
Abstract:: Continued stock declines in marine fisheries have resulted in a search for more risk-averse management approaches. In response, the Sustainable Fisheries Act of 1996 mandates habitat protection, bs catch reduction, and stock rebuilding. These changes emphasize precaution, and imply a shift in focus from maximizing yields to minimizing ecological impacts...
Resource Type:: Article
Full Text:: into management advice (Hilborn and Peterman 1995; Bradshaw and Borchers 2000). December 2000 Several

Beached birds and physical forcing in the California Current System

Creator:: Parrish, Julia K., Bond, Nicholas, Nevins, Hannah, Mantua, Nathan, Loeffel, Robert, Peterson, William T., and Harvey, James T.
Abstract:: Seabirds have often been proposed as environmental indicators. Beached bird data may provide an additional data source and such data is efficacious because it can reliably be collected by volunteers. In addition to anthropogenic factors, such as oil spills, changes in the ocean-atmosphere can affect carcass beaching rate in 3...
Resource Type:: Article
Full Text:: to summer conditions is frequently a sud- den event (Strub et al. 1987), bringing distinct changes in

Fish assemblages of rocky banks of the Pacific Northwest : final report

Creator:: Hixon, Mark A. (Mark Anthony),1951-, Tissot, Brian N. (Brian Nelson), and Pearcy, William G.
Resource Type:: Technical Report
Full Text:: , manned submersible operations off Oregon are possible only during the late summer. We also faced the

ScholarsArchive@OSU

Marine environment-based forecasting of coho salmon (Oncorhynchus kisutch) adult recruitment

Responses in growth rate of larval northern anchovy (Engraulis mordax) to anomalous upwelling in the northern California Current

The relationships between predatory fish, forage fishes, and juvenile salmonid marine survival off the Columbia River: a simple trophic model analysis

Influence of Regional Oceanography on the Distributions, Trophic Interactions, Growth, and Survival of the Early Life History Stages of Fishes

Multivariate Models of Adult Pacific Salmon Returns

Defining marine habitat of juvenile Chinook salmon, Oncorhynchus tshawytscha, and coho salmon, O. kisutch, in the northern California Current System

Uncertainty and Precautionary Management of Marine Fisheries: Can the Old Methods Fit the New Mandates?

Beached birds and physical forcing in the California Current System

Fish assemblages of rocky banks of the Pacific Northwest : final report

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