Index Catalog // ScholarsArchive@OSU

Increases in jellyfish biomass in the Bering Sea: implications for the ecosystem

Creator:: Brodeur, Richard D., Sugisaki, Hiroya, and Hunt Jr., George L.
Abstract:: There has been a dramatic increase in jellyfish biomass over the eastern Bering Sea shelf since the early 1990s, which was previously hypothesized to have been triggered by changing climate and ocean conditions. We examine the hypothesis that the presence of these large carnivores has affected fisheries resources, either through...
Resource Type:: Article
Full Text:: @noaa.gov Increases in jellyfish biomass in the Bering Sea: implications for the ecosystem Richard D

Large medusae in surface waters of the Northern California Current: variability in relation to environmental conditions

Creator:: Suchman, Cynthia L., Brodeur, Richard D., Daly, Elizabeth A., and Emmett, Robert L.
Abstract:: Blooms of jellyfish around the world have been correlated with climatic variables related to environmental causes. Sizeable populations of large medusae, primarily Chrysaora fuscescens and Aequorea sp., appear annually in shelf waters of the Northeast Pacific Ocean. Previous research has shown that C. fuscescens is abundant seasonally in the inner...
Resource Type:: Article
Full Text:: . Suchman • Richard D. Brodeur • Elizabeth A. Daly • Robert L. Emmett Published online: 15 March 2012

Abundance, distribution, and feeding ecology of Pyrosoma atlanticum in the Northern California Current

Creator:: Schram, Julie B., Sorensen, Hilarie L., Brodeur, Richard D., Galloway, Aaron W. E., and Sutherland, Kelly R.
Abstract:: During 2016-2018, unprecedented aggregations of the colonial pelagic tunicate Pyrosoma atlanticum were observed in the Northern California Current (NCC). Pyrosomes are common in tropical and sub-tropical ocean waters, but little is known about their abundance, distribution, and trophic ecology in mid-latitude systems. To assess these factors, pyrosomes were collected during...
Resource Type:: Article

Range expansion of tropical pyrosomes in the northeast Pacific Ocean

Creator:: Sutherland, Kelly R., Sorenson, Hilarie L., Blondheim, Olivia N., Brodeur, Richard D., and Galloway, Aaron W. E.
Abstract:: Pyrosomes are colonial pelagic tunicates that have fascinated marine biologists for over a century. Their name comes from the “fiery” bioluminescence that luminous organs produce at night time. Blooms of pyrosomes, identified as Pyrosoma atlanticum (Peron, 1804), have recently appeared in the North Pacific Ocean, prompting questions about environmental factors...
Resource Type:: Article

Spatial overlap between forage fishes and the large medusa Chrysaora fuscescens in the northern California Current region

Creator:: Brodeur, Richard D., Barceló, Caren, Robinson, Kelly L., Daly, Elizabeth A., and Ruzicka, James J.
Abstract:: As in many regions of the world, the shelf waters of the western United States have experienced large increases and high interannual variability in jellyfish populations in recent decades. The northern California Current (NCC) is a productive upwelling zone that is home to large populations of medusae, particularly during some...
Resource Type:: Article
Full Text:: California Current region Richard D. Brodeur1,*, Caren Barceló2, Kelly L. Robinson3, Elizabeth A. Daly4

Species composition and community structure of pelagic nekton off Oregon and Washington under variable oceanographic conditions

Creator:: Brodeur, Richard D., Fisher, Joseph P., Emmett, Robert L., Morgan, Cheryl A., and Casillas, Ed
Abstract:: Dramatic changes in the physical and biological conditions off Washington and Oregon, USA, have occurred since 1998, including extreme El Niño (warm) and La Niña (cool) years, high and low Columbia River flow years, a major intrusion of subarctic water, and a low oxygen event on the shelf. The occurrence...
Resource Type:: Article
Full Text:: Richard D. Brodeur1,*, Joseph P. Fisher2, Robert L. Emmett1, Cheryl A. Morgan3, Ed Casillas4 1Northwest

Columbia River plume fronts. II. Distribution, abundance, and feeding ecology of juvenile salmon

Creator:: De Robertis, Alex, Morgan, Cheryl A., Schabetsberger, Robert A., Zabel, Richard W., Brodeur, Richard D., Emmett, Robert L., Knight, Carolyn M., Krutzikowsky, Gregory K., and Casillas, Edmundo
Abstract:: Well-defined fronts develop at the seaward edge of riverine plumes where suspended materials and planktonic organisms are concentrated by convergent water flows. Riverine plume fronts have been hypothesized to be favorable fish habitats because they can lead to localized prey aggregations. We examined the spatial distribution of juvenile Pacific salmonids...
Resource Type:: Article
Full Text:: , Robert A. Schabetsberger2,3, Richard W. Zabel4, Richard D. Brodeur1, Robert L. Emmett1, Carolyn M

RuzickaJamesHMSCEvaluatingEnergyFlows(Appendices).pdf

Creator:: Robinson, Kelly L., Ruzicka, James J., Hernandez, Frank J., Graham, William M., Decker, Mary Beth, Brodeur, Richard D., and Sutor, Malinda
Abstract:: Fishery management production models tend to stress only the elements directly linked to fish (i.e. fish, fish food, and fish predators). Large coastal jellyfish are major consumers of plankton in heavily fished ecosystems; yet, they are frequently not included as model components. We explore the relationship between gulf menhaden (Brevoortia...
Full Text:: sandy bottoms of the northwestern Mediterranean Sea. Marine Biology, 160: 2781‐2795. Barros, N. l. B

RuzickaJamesHMSCEvaluatingEnergyFlows(SupplementaryTables).xlsx

Creator:: Robinson, Kelly L., Ruzicka, James J., Hernandez, Frank J., Graham, William M., Decker, Mary Beth, Brodeur, Richard D., and Sutor, Malinda
Abstract:: Fishery management production models tend to stress only the elements directly linked to fish (i.e. fish, fish food, and fish predators). Large coastal jellyfish are major consumers of plankton in heavily fished ecosystems; yet, they are frequently not included as model components. We explore the relationship between gulf menhaden (Brevoortia...
Full Text:: ., L. apodus, L. buccanella, L. campechanus, L. griseus, L. synagris, L. vivanus, Lutjanidae

RuzickaJamesHMSCEvaluatingEnergyFlows.pdf

Creator:: Robinson, Kelly L., Ruzicka, James J., Hernandez, Frank J., Graham, William M., Decker, Mary Beth, Brodeur, Richard D., and Sutor, Malinda
Abstract:: Fishery management production models tend to stress only the elements directly linked to fish (i.e. fish, fish food, and fish predators). Large coastal jellyfish are major consumers of plankton in heavily fished ecosystems; yet, they are frequently not included as model components. We explore the relationship between gulf menhaden (Brevoortia...
Full Text:: ecosystem Kelly L. Robinson1‡*, James J. Ruzicka2, Frank J. Hernandez3, WilliamM. Graham1, Mary Beth

ScholarsArchive@OSU

Increases in jellyfish biomass in the Bering Sea: implications for the ecosystem

Large medusae in surface waters of the Northern California Current: variability in relation to environmental conditions

Abundance, distribution, and feeding ecology of Pyrosoma atlanticum in the Northern California Current

Range expansion of tropical pyrosomes in the northeast Pacific Ocean

Spatial overlap between forage fishes and the large medusa Chrysaora fuscescens in the northern California Current region

Species composition and community structure of pelagic nekton off Oregon and Washington under variable oceanographic conditions

Columbia River plume fronts. II. Distribution, abundance, and feeding ecology of juvenile salmon

RuzickaJamesHMSCEvaluatingEnergyFlows(Appendices).pdf

RuzickaJamesHMSCEvaluatingEnergyFlows(SupplementaryTables).xlsx

RuzickaJamesHMSCEvaluatingEnergyFlows.pdf

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