Index Catalog // ScholarsArchive@OSU

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:: NOAA Fisheries, Northwest Fisheries Science Center, Newport, OR 97365, USA J. P. Fisher Cooperative

Surface distribution of brachyuran megalopae and ichthyoplankton in the Columbia River plume during transition from downwelling to upwelling conditions

Creator:: Roegner, G. Curtis, Daly, Elizabeth A., and Brodeur, Richard D.
Abstract:: In the California Current coastal boundary zone, the spring transition between downwelling and upwelling conditions, along with the fluctuating structure of the Columbia River plume, creates highly dynamic interactions. In this study, we investigated whether the surface distribution of brachyuran larvae and ichthyoplankton would track the dynamics of the Columbia...
Resource Type:: Article
Full Text:: , Richard D. Brodeur c a Northwest Fisheries Science Center, National Marine Fisheries Service, National

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:: State University, Hatfield Marine Science Center, 2030 Marine Science Dr., Newport, OR 97365, USA bNOAA

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:: ; Integration and Application Network, University of Maryland Center for Environmental Science (http

Diet variability of forage fishes in the Northern California Current System

Creator:: Hill, Andrew D., Daly, Elizabeth A., and Brodeur, Richard D.
Abstract:: As fisheries management shifts to an ecosystem-based approach, understanding energy pathways and trophic relationships in the Northern California Current (NCC) will become increasingly important for predictive modeling and understanding ecosystem response to changing ocean conditions. In the NCC, pelagic forage fishes are a critical link between seasonal and interannual variation...
Resource Type:: Article
Full Text:: , Washington, D.C., p. 108. R. Development Core Team, 2012. R: A Language and Environment for Statistical

Ichthyoplankton distribution and abundance in relation to nearshore dissolved oxygen levels and other environmental variables within the Northern California Current System

Creator:: Johnson-Colegrove, Angela, Ciannelli, Lorenzo, and Brodeur, Richard D.
Abstract:: Nearshore hypoxia along the coast of Oregon and Washington is a seasonal phenomenon that has generated concern among scientists studying this temperate upwelling ecosystem. These waters are affected by coastal upwelling-induced hypoxia mainly during late summer and fall, but the effects of low oxygen levels on fish and invertebrate communities,...
Resource Type:: Article
Full Text:: University, Corvallis, OR 97331, U.S.A. 2Northwest Fisheries Science Center, National Oceanic and

Functional responses and scaling in predator–prey interactions of marine fishes: contemporary issues and emerging concepts

Creator:: Hunsicker, Mary E., Ciannelli, Lorenzo, Bailey, Kevin Mclean, Buckel, Jeffrey A., White, J. Wilson, Link, Jason S., Essington, Timothy E., Gaichas, Sarah, Anderson, Todd W., Brodeur, Richard D., Chan, Kung-Sik, Chen, Kun, Englund, Goran, Frank, Kenneth T., Freitas, Vania, Hixon, Mark A., Hurst, Thomas, Johnson, Darren W., Kitchell, James F., Reese, Doug, Rose, George A., Sjodin, Henrik, Sydeman, William J., van der Veer, Henk W., Vollset, Knut, and Zador, Stephani
Abstract:: Predatorprey interactions are a primary structuring force vital to the resilience of marine communities and sustainability of the worlds oceans. Human influences on marine ecosystems mediate changes in species interactions. This generality is evinced by the cascading effects of overharvesting top predators on the structure and function of marine ecosystems....
Resource Type:: Article
Full Text:: 97331, USA 2NOAA Fisheries, Alaska Fisheries Science Center, Seattle, WA 98115, USA 3Department of

Trace Levels of Fukushima Disaster Radionuclides in East Pacific Albacore

Creator:: Neville, Delvan R., Phillips, A. Jason, Brodeur, Richard D., and Higley, Kathryn A.
Abstract:: The Fukushima Daiichi power station released several radionuclides into the Pacific following the March 2011 earthquake and tsunami. A total of 26 Pacific albacore (Thunnus alalunga) caught off the Pacific Northwest U.S. coast between 2008 and 2012 were analyzed for ¹³⁷Cs and Fukushima-attributed ¹³⁴Cs. Both 2011 (2 of 2) and...
Resource Type:: Article
Full Text:: . ■ ACKNOWLEDGMENTS The authors thank the Office of Science Director of the National Marine Fisheries Service for

Analysis of Energy Flow in US GLOBEC Ecosystems Using End-to-End Models

Creator:: Ruzicka, James J., Steele, John H., Gaichas, Sarah K., Ballerini, Tosca, Gifford, Dian J., Brodeur, Richard D., and Hofmann, Eileen E.
Abstract:: End-to-end models were constructed to examine and compare the trophic structure and energy flow in coastal shelf ecosystems of four US Global Ocean Ecosystem Dynamics (GLOBEC) study regions: the Northern California Current, the Central Gulf of Alaska, Georges Bank, and the Southwestern Antarctic Peninsula. High-quality data collected on system components...
Resource Type:: Article
Full Text:: the mechanics of ocean ecosystem dynamics. Ecosystem models provide the best proxy for controlled

Species associations and redundancy in relation to biological hotspots within the northern California Current ecosystem

Creator:: Reese, Douglas C. and Brodeur, Richard D.
Abstract:: The dynamic nature of biological hotspots, while well recognized, is not well understood. We hypothesize that the persistence of hotspots in the northern California Current System (CCS), despite seasonal and annual changes in the nekton community species composition, is related to associations among species and their functional redundancy. To address...
Resource Type:: Article
Full Text:: University, 104 Nash Hall, Corvallis, OR 97331, USA b Fish Ecology Division, Northwest Fisheries Science

ScholarsArchive@OSU

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

Surface distribution of brachyuran megalopae and ichthyoplankton in the Columbia River plume during transition from downwelling to upwelling conditions

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

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

Diet variability of forage fishes in the Northern California Current System

Ichthyoplankton distribution and abundance in relation to nearshore dissolved oxygen levels and other environmental variables within the Northern California Current System

Functional responses and scaling in predator–prey interactions of marine fishes: contemporary issues and emerging concepts

Trace Levels of Fukushima Disaster Radionuclides in East Pacific Albacore

Analysis of Energy Flow in US GLOBEC Ecosystems Using End-to-End Models

Species associations and redundancy in relation to biological hotspots within the northern California Current ecosystem

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