Index Catalog // ScholarsArchive@OSU

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:: Marine Ecology Progress Series 264:123 MARINE ECOLOGY

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:: Marine Ecology Progress Series 299:33 MARINE ECOLOGY

An Investigation into the Distribution, Residency Patterns, Population Connectivity, and Abundance of Blue Whales (Balaenoptera musculus) in New Zealand

Creator:: Barlow, Dawn R.
Abstract:: Species conservation depends on robust population assessment. Data on population abundance, distribution, and connectivity are critical for effective management, especially as baseline information for newly documented populations. I describe a pygmy blue whale (Balaenoptera musculus brevicauda) population in New Zealand waters with year-round presence that overlaps with industrial activities. This...
Resource Type:: Masters Thesis
Full Text:: the past. I have shown how a multidisciplinary research approach, applied to one particular region

Benthic macrofauna, sediment and water quality near seafood cannery outfalls in Yaquina Bay, Oregon

Creator:: Swartz, Richard Carlyle, 1943-, Schults, Donald W., DeBen, Waldemar A., Cole, Faith A., Oregon State University. Marine Science Center. Marine and Freshwater Ecology Branch, and Corvallis Environmental Research Laboratory
Abstract:: "Seafood canneries in lower Yaquina Ray, Oregon process shrimp (Pandalus jordani), Dungeness crab (Cancer magister), a variety of bottom fish and several salmon species. The shrimp wastes are screened and discharged directly into the Ray beneath the cannery docks. During the shrimp processing season about 3.8 million liters of wastes...
Resource Type:: Technical Report
Full Text:: A. Cole Marine and Freshwater Ecology Branch Corvallis Environmental Research Laboratory

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:: MARINE ECOLOGY - PROGRESS SERIES Mar. Ecol. Prog. Ser

Development of Sex Markers for Rockfishes, Sebastes, inhabiting the Northeast Pacific Ocean

Creator:: Aycock, Hannah
Abstract:: Rockfishes (Sebastes) are important species for commercial and recreational fishing, as well as evolutionary and ecological research. It can be impractical to identify the sex of rockfishes using visual identification or lethal dissection, and the sex-determination systems of these species have not been studied extensively. The aim of this research...
Resource Type:: Research Paper
Full Text:: recreational fishing, as well as evolutionary and ecological research. It can be impractical to identify the

Altered search speed and growth: social versus independent foraging in two pelagic juvenile fishes

Creator:: Ryer, Clifford H. and Olla, Bori L.
Abstract:: Prior studies have demonstrated that juvenile walleye pollock Theragra chalcogramma forage socially in schools for spatially and temporally clumped food, but forage more independently for spatially and temporally dispersed food. One advantage of social foraging is that fish in schools may be able to locate more food clumps than fish...
Resource Type:: Article
Full Text:: MARINE ECOLOGY PROGRESS SERIES Mar Ecol Prog Ser Published

Larval development of Euphausia pacifica in the laboratory: variability in developmental pathways

Creator:: Feinberg, Leah R., Shaw, C. Tracy, and Peterson, William T.
Abstract:: Gravid adult female Euphausia pacifica were collected off Newport, Oregon, USA and transferred to the laboratory, where females spawned eggs, eggs hatched, and larvae were reared at 10.5 degrees C. We fed 4 cohorts of larvae to excess with a combination of phytoplankton species and monitored them daily until they...
Resource Type:: Article
Full Text:: Marine Ecology Progress Series 316:127 MARINE ECOLOGY

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:: -cho 3 chome, Shiogama, Miyagi, 985 Japan 3Department of Ecology and Evolutionary Biology, University

Food deprivation affects vertical distribution and activity of a marine fish in a thermal gradient: potential energy-conserving mechanisms

Creator:: Sogard, Susan M. and Olla, Bori L.
Abstract:: The effects of reduced food availability on the behavior of juvenile walleye pollock Theragra chalcogramma were examined in laboratory experiments designed to test for potential energy-conserving responses. Groups of juvenile fish were held on 1 of 6 ration treatments ranging from ad libitum to near starvation, and then vertical distribution...
Resource Type:: Article
Full Text:: Vol. 133: 43-55.1996 MARINE ECOLOGY PROGRESS SERIES Mar Ecol

ScholarsArchive@OSU

Summertime foraging ecology of North Atlantic right whales

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

An Investigation into the Distribution, Residency Patterns, Population Connectivity, and Abundance of Blue Whales (Balaenoptera musculus) in New Zealand

Benthic macrofauna, sediment and water quality near seafood cannery outfalls in Yaquina Bay, Oregon

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

Development of Sex Markers for Rockfishes, Sebastes, inhabiting the Northeast Pacific Ocean

Altered search speed and growth: social versus independent foraging in two pelagic juvenile fishes

Larval development of Euphausia pacifica in the laboratory: variability in developmental pathways

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

Food deprivation affects vertical distribution and activity of a marine fish in a thermal gradient: potential energy-conserving mechanisms

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