Index Catalog // ScholarsArchive@OSU

Ocean habitat use in autumn by Chinook salmon in coastal waters of Oregon and California

Creator:: Hinke, Jefferson T., Watters, George M., Boehlert, George W., and Zedonis, Paul
Abstract:: Describing the ocean habitats used by Chinook salmon Oncorhynchus tshawytscha is an important step towards understanding how environmental conditions influence their population dynamics. We used data from archival tags that recorded time, temperature and pressure (depth) to define the coastal habitats used by Chinook near Oregon and California during the...
Resource Type:: Article
Full Text:: waters of Oregon and California Jefferson T. Hinke1, 2,*, George M. Watters2, George W. Boehlert3, Paul

Feeding ecology of pelagic larvae of English sole Parophrys vetulus and butter sole Isopsetta isolepis off the Oregon coast

Creator:: Gadomski, Dena M. and Boehlert, George W.
Abstract:: The food habits of the 2 dominant larval pleuronectids off the Oregon coast - English sole Parophrys vetulus and butter sole Isopsetta isolepis - were analysed. Most specimens were collected during January-April 1971 and March-April 1973. As is typical of larval fishes, I. isolepis larvae ingested a variety of prey...
Resource Type:: Article
Full Text:: Isopsetta isolepis off the Oregon coast Dena M. Gadomski* and George W. Boehlert** College of

Macrofaunal modification of porewater advection: role of species function, species interaction, and kinetics

Creator:: Waldbusser, George G. and Marinelli, Roberta L.
Abstract:: ABSTRACT: Sedimentary habitats are complex associations of biotic, chemical, and physical processes comprising ‘ecosystem function’. The relative importance of these processes to biogeochemical cycling in highly reactive, permeable sediments remains poorly understood. We report results from several field experiments in a muddy-sand intertidal flat dominated by 2 functionally different types...
Resource Type:: Article
Full Text:: , and kinetics George G. Waldbusser*, Roberta L. Marinelli Chesapeake Biological Laboratory, One

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:: . Brodeur1,*, Hiroya Sugisaki2, George L. Hunt Jr 3 1Northwest Fisheries Science Center, National Marine

Seasonal variation of male-type antennular setation in female Calanus finmarchicus

Creator:: Miller, Charles B., Crain, Jennifer A., and Marcus, Nancy H.
Abstract:: Female calanoid copepods of the family Calanidae can mature with either the juvenile and most typical female pattern of setation, termed trithek (T), or with the male pattern, termed quadrithek (Q). It was suggested by Fleminger (1985), but not proved, that females with the Q pattern have switched from development...
Resource Type:: Article
Full Text:: and partner availability in sex determination in a parasitic copepod. Proc R Soc Lond B 2665:1153–1156

Predicting fish recruitment from juvenile abundance and environmental indices

Creator:: Stige, Leif Christian, Hunsicker, Mary E., Bailey, Kevin M., Yaragina, Natalia A., and Hunt, George L., Jr.
Abstract:: Prediction of year-class strength is a critical challenge for fisheries managers. Theoretically, predictions of recruitment should be better when they are based on estimates of cohort size taken close to the age of recruitment and may improve if the effects of environmental factors that influence pre-recruit mortality are accounted for....
Resource Type:: Article
Full Text:: Christian Stige1,*, Mary E. Hunsicker2, Kevin M. Bailey3, Natalia A. Yaragina4, George L. Hunt Jr5 1Centre

Summertime foraging ecology of North Atlantic right whales

Creator:: Baumgartner, Mark F. and Mate, Bruce R.
Abstract:: North Atlantic right whales were instrumented with suction-cup mounted, time-depth recorders (TDR) during the summers of 2000 and 2001 to examine their diving and foraging behavior. Simultaneous observations of temperature, salinity and the vertical distribution of their principal prey, Calanus finmarchicus stage 5 copepodites (C5), were obtained alon g each...
Resource Type:: Article
Full Text:: @whoi.edu Summertime foraging ecology of North Atlantic right whales Mark F. Baumgartner1, 3,*, Bruce R

Proximity to multiple foraging habitats enhances seabirds’ resilience to local food shortages

Creator:: Paredes, Rosana, Harding, Ann M. A., Irons, David B., Roby, Daniel D., Suryan, Robert M., Orben, Rachael A., Renner, Heather, Young, Rebecca, and Kitaysky, Alexander
Abstract:: As central-place foragers, seabirds from colonies located close to multiple and/or productive marine habitats might experience increased foraging opportunities and enhanced resilience to food shortages. We tested whether this hypothesis might explain divergent trends in 3 populations of black-legged kittiwakes Rissa tridactyla, a surface-feeding piscivore, in the eastern Bering Sea....
Resource Type:: Article
Full Text:: kittiwakes from 2 continental shelf colonies (St. Paul and St. George) and an oceanic colony (Bogoslof

Phytoplankton balance in the oceanic subarctic Pacific: Grazing impact of Metridia pacifica

Creator:: Batchelder, Harold P.
Abstract:: Ingestion and respiration by Metridia pacifica, the dominant large copepod during autumn and winter in the subarctic Pacific, were investigated by shipboard and laboratory experiments. Diel variation in the rate of grazing on phytoplankton by M. pacifica was determined from measurements of gut pigment content and gastric evacuation rate. Both...
Resource Type:: Article
Full Text:: females but h g h e r daily energy expenditwe than gain for C5 Based on the respiration measurements, a

Parasite communities indicate effects of cross-shelf distributions, but not mesoscale oceanographic features on northern California Current mid-trophic food web

Creator:: Jacobson, Kym C., Baldwin, Rebecca E. B., and Reese, Douglas C.
Abstract:: Mesoscale physical oceanographic features, such as jets and eddies, can influence the structure of marine ecosystems. We used trophically transmitted parasite communities of pelagic fishes in the northern California Current to examine effects of physical oceanographic features on pelagic ecosystem structure. We tested the hypotheses that (1) oceanographic features associated...
Resource Type:: Article
Full Text:: (R. Olson pers. data) and to type specimens from the US National Parasite Collection, Beltsville

ScholarsArchive@OSU

Ocean habitat use in autumn by Chinook salmon in coastal waters of Oregon and California

Feeding ecology of pelagic larvae of English sole Parophrys vetulus and butter sole Isopsetta isolepis off the Oregon coast

Macrofaunal modification of porewater advection: role of species function, species interaction, and kinetics

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

Seasonal variation of male-type antennular setation in female Calanus finmarchicus

Predicting fish recruitment from juvenile abundance and environmental indices

Summertime foraging ecology of North Atlantic right whales

Proximity to multiple foraging habitats enhances seabirds’ resilience to local food shortages

Phytoplankton balance in the oceanic subarctic Pacific: Grazing impact of Metridia pacifica

Parasite communities indicate effects of cross-shelf distributions, but not mesoscale oceanographic features on northern California Current mid-trophic food web

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