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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:: Pacific salmon requires multiple types of data and that no single indicator can represent the complex

State of the California Current 2012–13: No Such Thing as an "Average" Year

Creator:: Wells, Brian K., Schroeder, Isaac D., Santora, Jarrod A., Hazen, Elliott L., Bograd, Steven J., Bjorkstedt, Eric P., Loeb, Valerie J., Mcclatchie, Sam, Weber, Edward D., Watson, William, Thompson, Andrew R., Peterson, William T., Brodeur, Richard D., Harding, Jeff, Field, John, Sakuma, Keith, Hayes, Sean, Mantua, Nathan, Sydeman, William J., Losekoot, Marcel, Thompson, Sarah Ann, Largier, John, Kim, Sung Yong, Chavez, Francisco P., Barceló, Caren, Warzybok, Pete, Bradley, Russel, Jahncke, Jaime, Goericke, Ralf, Campbell, Gregory S., Hildebrand, John A., Melin, Sharon R., Delong, Robert L., Gomez-Valdes, Jose, Lavaniegos, Bertha, Gaxiola-Castro, Gilberto, Golightly, Richard T., Schneider, Stephanie R., Lo, Nancy, Suryan, Robert M., Gladics, Amanda J., Horton, Cheryl A., Fisher, Jennifer, Morgan, Cheryl, Peterson, Jay, Daly, Elizabeth A., Auth, Toby D., and Abell, Jeffrey
Abstract:: This report reviews the state of the California Current System (CCS) between winter 2012 and spring 2013, and includes observations from Washington State to Baja California. During 2012, large-scale climate modes indicated the CCS remained in a cool, productive phase present since 2007. The upwelling season was delayed north of...
Resource Type:: Article

The state of California, 2003 - 2004 : still cool?

Creator:: Goericke, Ralf, Venrick, Elizabeth, Mantyla, Arnold W., Hooff, Rian, Collins, Curtis A., Gaxiola-Castro, Gilberto, Bograd, Steven J., Schwing, Franklin B., Peterson, William T., Marinovic, Baldo, Durazo, Reginaldo, Huyer, Adriana, 1945-, Smith, Robert L. (Robert Lloyd), 1935-, Wheeler, Patricia A., Chavez, Francisco, Lo, Nancy, Hyrenbach, K. David, and Sydeman, William J.
Abstract:: This report summarizes the recent state of the California Current System (CCS), primarily during the period of April 2004 to January 2005. The report is based on observations made between Oregon and Baja California by various ocean observing programs. The CCS was not forced by any coherent basin-wide processes during...
Resource Type:: Article
Full Text:: , California 94970 Ensenada, Baja California, México ABSTRACT This report summarizes the recent state of the

The state of California, 2003 - 2004 : a rare "normal" year

Creator:: Goericke, Ralf, Venrick, Elizabeth, Mantyla, Arnold W., Bograd, Steven J., Schwing, Franklin B., Huyer, Adriana, 1945-, Smith, Robert L. (Robert Lloyd), 1935-, Wheeler, Patricia A., Hooff, Rian, Peterson, William T., Gaxiola-Castro, Gilberto, Gomez-Valdes, Jose, Lavaniegos, Bertha E., Hyrenbach, K. David, and Sydeman, William J.
Abstract:: This report describes the state of the California Current System (CCS)—meteorological, physical, chemical, and biological—from January 2003 to the spring of 2004. The area covered in this report ranges from Oregon coastal waters to southern Baja California. Over the past year, most physical, chemical, and biological parameters were close to...
Resource Type:: Article
Full Text:: “NORMAL” YEAR ABSTRACT This report describes the state of the California Current System (CCS

The state of California current, 2001 – 2002 : will the Californa current system keep its cool, or is El Niño coming?

Creator:: Schwing, Franklin B., Gaxiola-Castro, Gilberto, Goméz-Valdéz, José, Kosro, P. Michael, 1951-, Mantyla, Arnold W., Smith, Robert L. (Robert Lloyd), 1935-, Bograd, Steven J., García, Joaqúin, Huyer, Adriana, 1945-, Lavaniegos, Bertha E., Ohman, Mark D., Sydeman, William J., Wheeler, Patricia A., Collins, Curtis A., Goericke, Ralf, Hyrenbach, K. David, Lynn, Ronald J., Peterson, William T., and Venrick, Elizabeth
Abstract:: This report summarizes physical and biological conditions in the California Current System (CCS), from Oregon to Baja California, in 2001 and 2002. The principal sources of the observations described here are the CalCOFI (California Cooperative Oceanic Fisheries Investigations), IMECOCAL (Investigaciones Mexicanas de la Corriente de California), and U.S. GLOBECLTOP (Global...
Resource Type:: Article
Full Text:: This report summarizes physical and biological con- ditions in the California Current System (CCS

Egg production rates of the copepod Calanus marshallae in relation to seasonal and interannual variations in microplankton biomass and species composition in the coastal upwelling zone off Oregon, USA

Creator:: Peterson, William T. and Du, Xiuning
Abstract:: In this study, we assessed trophic interactions between microplankton and copepods by studying the functional response of egg production rates (EPR; eggs female⁻¹day⁻¹) of the copepod Calanus marshallae to variations in microplankton biomass, species composition and community structure. Female C. marshallae and phytoplankton water samples were collected biweekly at an...
Resource Type:: Article
Full Text:: significantly higher in summer while no seasonal differences were found in abundance of dinoflagellates

Winter ichthyoplankton biomass as a predictor of early summer prey fields and survival of juvenile salmon in the northern California Current

Creator:: Daly, Elizabeth A., Auth, Toby D., Brodeur, Richard D., and Peterson, William T.
Abstract:: Diets of juvenile coho Oncorhynchus kisutch and Chinook O. tshawytscha salmon are made up primarily of winter-spawning fish taxa in the late-larval and early juvenile stages that are undersampled in plankton and larger trawl nets. Although we have no direct measure of the availability of fish prey important to juvenile...
Resource Type:: Article
Full Text:: larger trawl nets. Although we have no direct measure of the availability of fish prey important to

Linking predators to seasonality of upwelling: Using food web indicators and path analysis to infer trophic connections

Creator:: Thompson, Sarah Ann, Sydeman, William J., Santora, Jarrod A., Black, Bryan A., Suryan, Robert M., Calambokidis, John, Peterson, William T., and Bograd, Steven J.
Abstract:: Upwelling in eastern boundary current systems is a primary driver of ecosystem productivity. Typically, peak upwelling occurs during spring and summer, but winter upwelling may also be important to ecosystem functions. In this study, we investigated the hypothesis that winter and spring/summer upwelling, operating through indirect trophic interactions, are important...
Resource Type:: Article
Full Text:: (Oncorhynchus tshawytscha) dependent variables, whereas splitnose rockfish (Sebastes diploproa) showed no

Climate shifts the interaction web of a marine plankton community

Creator:: Francis, Tessa B., Scheuerell, Mark D., Brodeur, Richard D., Levin, Phillip S., Ruzicka, James J., Tolimieri, Nick, and Peterson, William T.
Abstract:: Climatic effects in the ocean at the community level are poorly described, yet accurate predictions about ecosystem responses to changing environmental conditions rely on understanding biotic responses in a food-web context to support knowledge about direct biotic responses to the physical environment. Here we conduct time-series analyses with multivariate autoregressive...
Resource Type:: Article
Full Text:: , no ecosystem shift in zooplankton biomass or biovolume was observed in the latter half of the 20th

The impact of El Niño events on the pelagic food chain in the northern California Current

Creator:: Fisher, Jennifer L., Peterson, William T., and Rykaczewski, Ryan R.
Abstract:: The zooplankton of the northern California Current are typically characterized by an abundance of lipid-rich copepods that support rapid growth and survival of ecologically, commercially, and recreationally valued fish, birds, and mammals. Disruption of this food chain and reduced ecosystem productivity are often associated with climatic variability such as El...
Resource Type:: Article
Full Text:: http://cdss.library.oregonstate.edu/sa-termsofuse The impact of El Ni~no events on the pelagic

ScholarsArchive@OSU

Multivariate Models of Adult Pacific Salmon Returns

State of the California Current 2012–13: No Such Thing as an "Average" Year

The state of California, 2003 - 2004 : still cool?

The state of California, 2003 - 2004 : a rare "normal" year

The state of California current, 2001 – 2002 : will the Californa current system keep its cool, or is El Niño coming?

Egg production rates of the copepod Calanus marshallae in relation to seasonal and interannual variations in microplankton biomass and species composition in the coastal upwelling zone off Oregon, USA

Winter ichthyoplankton biomass as a predictor of early summer prey fields and survival of juvenile salmon in the northern California Current

Linking predators to seasonality of upwelling: Using food web indicators and path analysis to infer trophic connections

Climate shifts the interaction web of a marine plankton community

The impact of El Niño events on the pelagic food chain in the northern California Current

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