Index Catalog // ScholarsArchive@OSU

Evidence that summer jellyfish blooms impact Pacific Northwest salmon production

Creator:: Ruzicka, James J., Daly, Elizabeth A., and Brodeur, Richard D.
Abstract:: Interannual variability in salmon (Oncorhynchus spp.) production in the northeast Pacific is understood to be driven by oceanographic variability and bottom-up processes affecting prey availability to juvenile salmon. Scyphozoan jellyfish have an important role in shaping the pathways of energy flow through pelagic food webs. While jellyfish obtain high production...
Resource Type:: Article

Seasonal food web models for the Oregon inner-shelf ecosystem : investigating the role of large jellyfish

Creator:: Ruzicka, James J., Brodeur, Richard D., and Wainwright, Thomas C.
Abstract:: Previously published in California Cooperative Oceanic Fisheries Investigations Progress Report, 2007, Vol.48; access courtesy of publisher and authors.
Resource Type:: Research Paper
Full Text:: ROLE OF LARGE JELLYFISH JAMES J. RUZICKA RICHARD D. BRODEUR AND THOMAS C. WAINWRIGHT Cooperative

Dividing up the pie: Whales, fish, and humans as competitors

Creator:: Ruzicka, James J., Steele, John H., Ballerini, Tosca, Gaichas, Sarah K., and Ainley, David G.
Abstract:: Similarly structured food web models of four coastal ecosystems (Northern California Current, Central Gulf of Alaska, Georges Bank, southwestern Antarctic Peninsula) were used to investigate competition among whales, fishes, pinnipeds, and humans. Two analysis strategies simulated the effects of historic baleen and odontocete whale abundances across all trophic levels: food...
Resource Type:: Article
Full Text:: .: +1 541 867 0382. E-mail address: Jim.Ruzicka@oregonstate.edu (J.J. Ruzicka). James J. Ruzicka a

Jellyfish, Forage Fish, and the World’s Major Fisheries

Creator:: Robinson, Kelly L., Ruzicka, James J., Decker, Mary Beth, Brodeur, Richard D., Hernandez, Frank J., Quiñones, Javier, Acha, E. Marcelo, Uye, Shin-ichi, Mianzan, Hermes, and Graham, William M.
Abstract:: A majority of the world’s largest net-based fisheries target planktivorous forage fish that serve as a critical trophic link between the plankton and upper-level consumers such as large predatory fishes, seabirds, and marine mammals. Because the plankton production that drives forage fish also drives jellyfish production, these taxa often overlap...
Resource Type:: Article
Full Text:: Jellyfish, Forage Fish, and the World’s Major Fisheries Robinson, K. L., Ruzicka, J. J., Decker, M. B

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:: LL I P S . LEV IN * , JAMES J . RUZ ICKA ‡ , N ICK TOL IM IER I * and WILLIAM T. PETERSON

A history of the kokanee in Detroit Reservoir

Creator:: Wetherbee, J. J. and Oregon. State Game Commission
Abstract:: "Kokanee were originally stocked in Detroit Reservoir in 11959. This species was introduced in hopes that it would utilize pelagic zoo plankton and provide a more varied sport fishery. The trout fishery in the reservoir depends primarily on heavy plants of legal-sized rainbow trout, supplemented by stocking fingerling rainbow. As...
Resource Type:: Technical Report
Full Text:: A HISTORY OF THE KOKANEE IN DETROIT RESERVOIR By J. J

Feeding Behavior, Prey Consumption, and Growth of Juvenile Red Hake

Creator:: Luczkovich, J. J. and Olla, B. L.
Abstract:: Juvenile red hake Urophycis chuss were collected while they were inhabiting sea scallops Placopecten magellanicus , and the effects of appetite and food availability on prey consumption and growth were examined under laboratory conditions. Fish took increasing amounts of live amphipods Gammarus annulatus with increasing periods of food deprivation up...
Resource Type:: Article
Full Text:: ://www.tandfonline.com/loi/utaf20 Feeding Behavior, Prey Consumption, and Growth of Juvenile Red Hake J. J. Luczkovich a

Hydrothermal Discharge During Submarine Eruptions

Creator:: Baker, Edward T., Chadwick, Wi l l iam W. Jr., Cowen, James P., Dziak, Robert P., Rubin, Kenneth H., and Fornari, Daniel J.
Abstract:: 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 even microbes from the crust to the ocean, but the processes that control these transfers are poorly...
Resource Type:: Article
Full Text:: k e r , w i l l i a m w . c h a d w i c k J r . , J a m e S p. c O w e N , r O B e r t p

Interannual variability in the Northern California Current food web structure: Changes in energy flow pathways and the role of forage fish, euphausiids, and jellyfish

Creator:: Ruzicka, James J., Brodeur, Richard D., Emmett, Robert L., Steele, John H., Zamon, Jeannette E., Morgan, Cheryl A., Thomas, Andrew C., and Wainwright, Thomas C.
Abstract:: 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, interannually, and decadally due to variability in coastal upwelling, climate-scale physical processes, and the migratory species entering...
Resource Type:: Article
Full Text:: energy flow pathways and the role of forage fish, euphausiids, and jellyfish James J. Ruzicka a

Analysis of Northeast Pacific cores EW9504-12PC and EW9504-13PC using (40)Ar-(39)Ar dating, paleomagnetics, CaCO3 extraction, and radiolaria marker methods to determine glacial/interglacial influences in response to geographic location

Creator:: Caver, Leah J.
Abstract:: Keywords: EW9504-12PC; EW9504-13PC; 40Ar-39Ar; paleomagnetics; calcium carbonate; CaCO3; Argon-Argon dating; climate variability; Ceratospyris borealis; Stylatractus universus
Resource Type:: Research Paper

ScholarsArchive@OSU

Evidence that summer jellyfish blooms impact Pacific Northwest salmon production

Seasonal food web models for the Oregon inner-shelf ecosystem : investigating the role of large jellyfish

Dividing up the pie: Whales, fish, and humans as competitors

Jellyfish, Forage Fish, and the World’s Major Fisheries

Climate shifts the interaction web of a marine plankton community

A history of the kokanee in Detroit Reservoir

Feeding Behavior, Prey Consumption, and Growth of Juvenile Red Hake

Hydrothermal Discharge During Submarine Eruptions

Interannual variability in the Northern California Current food web structure: Changes in energy flow pathways and the role of forage fish, euphausiids, and jellyfish

Analysis of Northeast Pacific cores EW9504-12PC and EW9504-13PC using (40)Ar-(39)Ar dating, paleomagnetics, CaCO3 extraction, and radiolaria marker methods to determine glacial/interglacial influences in response to geographic location

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