Index Catalog // ScholarsArchive@OSU

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

Trophic ecology of the neustonic cnidarian Velella velella in the northern California Current during an extensive bloom year: insights from gut contents and stable isotope analysis

Creator:: Zeman, Samantha M., Corrales‑Ugalde, Marco, Brodeur, Richard D., and Sutherland, Kelly R.
Abstract:: Aggregations of the neustonic hydrozoan Velella velella occur periodically in the northern California Current. Despite the regular occurrence of notable bloom events in this productive upwelling zone, little is known about their trophic ecology. We used gut content and stable isotope analyses (SIA) to elucidate V. velella prey selectivity and...
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

Seasonal distribution and environmental associations among late larval and juvenile rockfish (Sebastes spp.) off Oregon and Washington: new insights based on genetics

Creator:: Johansson, Mattias L., Litz, Marisa N. C., Brodeur, Richard D., Britt, Tristan A., Vanegas, Camilo A., Hyde, John R., and Banks, Michael A.
Abstract:: Cytochrome B sequence data (FASTA format) from the paper “Seasonal distribution and environmental associations among late larval and juvenile rockfish (Sebastes spp.) off Oregon and Washington: new insights based on genetics”. The data was generated from a sample of 2534 unknown, field collected late-larval and juvenile rockfishes from the Pacific...
Resource Type:: Dataset

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

Evaluating energy flows through jellyfish and gulf menhaden (Brevoortia patronus) and the effects of fishing on the northern Gulf of Mexico ecosystem

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...
Resource Type:: Article

Warming Ocean Conditions Relate to Increased Trophic Requirements of Threatened and Endangered Salmon

Creator:: Daly, Elizabeth A. and Brodeur, Richard D.
Abstract:: The trophic habits, size and condition of yearling Chinook salmon (Oncorhynchus tshawytscha) caught early in their marine residence were examined during 19 survey years (1981–1985; 1998–2011). Juvenile salmon consumed distinct highly piscivorous diets in cold and warm ocean regimes with major differences between ocean regimes driven by changes in consumption...
Resource Type:: Article

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

Anomalous ichthyoplankton distributions and concentrations in the northern California Current during the 2010 El Niño and La Niña events

Creator:: Auth, Toby D., Brodeur, Richard D., and Peterson, Jay O.
Abstract:: In late spring of 2010, the northern California Current (NCC) experienced a transition from El Niño to La Niña conditions resulting in anomalous distributions and concentrations within the ichthyoplankton community. We analyzed larval fish data collected during the four months before and after this transition and compared them to data...
Resource Type:: Article

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

ScholarsArchive@OSU

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

Trophic ecology of the neustonic cnidarian Velella velella in the northern California Current during an extensive bloom year: insights from gut contents and stable isotope analysis

Range expansion of tropical pyrosomes in the northeast Pacific Ocean

Seasonal distribution and environmental associations among late larval and juvenile rockfish (Sebastes spp.) off Oregon and Washington: new insights based on genetics

Evidence that summer jellyfish blooms impact Pacific Northwest salmon production

Evaluating energy flows through jellyfish and gulf menhaden (Brevoortia patronus) and the effects of fishing on the northern Gulf of Mexico ecosystem

Warming Ocean Conditions Relate to Increased Trophic Requirements of Threatened and Endangered Salmon

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

Anomalous ichthyoplankton distributions and concentrations in the northern California Current during the 2010 El Niño and La Niña events

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

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