Index Catalog // ScholarsArchive@OSU

Growth and distributional correlates of behavior in three co-occurring juvenile flatfishes

Creator:: Ryer, Clifford H., Boersma, Kate S., and Hurst, Thomas P.
Abstract:: We explored whether anti-predator behavior and intrinsic growth are co-evolved traits in 3 co-occurring juvenile flatfish species: English sole Pleuronectes vetulus, Pacific halibut Hippoglossus stenolepis and northern rock sole Lepidopsetta polyxystra. English sole are risk prone, adopting behavior that renders them more vulnerable to predation, while northern rock sole are...
Resource Type:: Article
Full Text:: 18 M as s sp ec ifi c gr ow th r at e (d –1 ) 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5

Biological indicators of the timing and direction of warm-water advection during the 1997/1998 El Niño off the central Oregon coast, USA

Creator:: Keister, Julie E., Johnson, Travis B., Morgan, Cheryl A., and Peterson, William T.
Abstract:: Unusual collections of several euphausiid, chaetognath, and copepod species help elucidate the effects of the strong 1997/1998 El Niño off the central Oregon, USA, coast. Furcilia of Nyctiphanes simplex, a euphausiid typically found only as far north as central California, were collected in bi-weekly nearshore samples between December 1997 and...
Resource Type:: Article
Full Text:: surface flows off central Oregon aver- aged 13.7 cm s–1 higher than normal during August 1997 to February

Nested scales of spatial heterogeneity in juvenile walleye pollock Theragra chalcogramma in the southeastern Bering Sea

Creator:: Benoit-Bird, Kelly J., McIntosh, Neal E., and Heppell, Scott A.
Abstract:: We sought to characterize the distribution of juvenile walleye pollock Theragra chalcogramma in an area of intense predator-prey interactions and to describe habitat features that lead to their observed distributions. The distribution of juvenile walleye pollock around the Pribilof Islands in the southeastern Bering Sea in 2008 and 2009 was...
Resource Type:: Article
Full Text:: rate of 1 m s−1, and zooplank- ton captured in the net were immediately preserved in a solution of 5

Variability in brood size and female length of Euphausia pacifica among three populations in the North Pacific

Creator:: Gomez-Gutierrez, Jaime, Feinberg, Leah R., Shaw, Tracy, and Peterson, William T.
Abstract:: We compared brood sizes among adult female Euphausia pacifica Hansen, 1911 from 3 populations in the North Pacific: Puget Sound, Washington, USA; Toyama Bay, Japan; and the Oregon coast, USA. Additionally, we used multiple linear regression models to compare the interspecific brood size as a function of female length and...
Resource Type:: Article
Full Text:: -5503, USA 2CIMRS, and 3NOAA/NMFS, Hatfield Marine Science Center, 2030 S Marine Science Drive, Newport

Ecophysiological interpretation of oxygen consumption rates and enzymatic activities of deep-sea copepods

Creator:: Thuesen, Erik V., Miller, Charles B., and Childress, James J.
Abstract:: We measured oxygen consumption rates, the activities of citrate synthase (CS) and lactate dehydrogenase (LDH) and protein contents for over 30 species of deep-sea pelagic Copepoda. The lowest oxygen consumption rates were measured in Euaugaptilus magnus and the highest rates were measured in Paraeuchaeta tonsa. Weight-specific oxygen consumption rates declined...
Resource Type:: Article
Full Text:: enzymatic activities of deep-sea copepods Erik V. T h u e s e n l * * , Charles B. ill er^, James J

Population growth across heterogeneous environments: effects of harvesting and age structure

Creator:: Durant, Joel M., Hidalgo, Manuel, Rouyer, Tristan, Hjermann, Dag O., Ciannelli, Lorenzo, Eikeset, Anne Maria, Yaragina, Natalia, and Stenseth, N. C.
Abstract:: Population growth is affected by several factors such as climate, species interaction and harvesting pressure. However, additional complexity can arise if fishing increases the sensitivity to environmental variability. To predict the effects of fisheries and climate on marine populations, there is a need for improved understanding of how they affect...
Resource Type:: Article
Full Text:: Oceanogràfic de les Balears, Moll de Ponent s/n, 07015 Palma, Spain 6Present address: Laboratoire Ressources

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:: fic ie nt s) Fig. 1. Temporal change in the correlations between recruit- ment and early life-stage

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:: time interval (t) was calcu- lated from: (S, - ~ , e - ~ ' ) Et C, = 1 - e-Ec (Elliot & Persson

Landscape dynamics and resulting species interactions: the cod-capelin system in the southeastern Bering Sea

Creator:: Ciannelli, Lorenzo and Bailey, Kevin Mclean
Abstract:: Capelin are a major component of cod diet in many ecosystems of the North Atlantic. In the Bering Sea, however, the percentage of capelin found in Pacific cod stomachs is negligible. We hypothesize that the landscape (or ‘seascape’) features of hydrography and bathymetry of the Bering Sea impose a constraint...
Resource Type:: Article
Full Text:: capelin), x is the value of the variable a recorded at the station s and year t, T is the total number of

Modeling carbohydrate ballasting by Trichodesmium spp.

Creator:: White, Angelicque E., Spitz, Yvette H., and Letelier, Ricardo M.
Abstract:: We report the development of a numerical model simulating vertical movement of the cyanobacterium Trichodesmium spp. Given a range of physiological parameters derived from the literature, resultant model solutions allow us to explore the ecological significance of vertical migration by Trichodesmium colonies in a stratified oligotrophic oceanic system such as...
Resource Type:: Article
Full Text:: density change and photon irradiance (0 to 500 μmol photons m–2 s–1). Density change as a function of

ScholarsArchive@OSU

Growth and distributional correlates of behavior in three co-occurring juvenile flatfishes

Biological indicators of the timing and direction of warm-water advection during the 1997/1998 El Niño off the central Oregon coast, USA

Nested scales of spatial heterogeneity in juvenile walleye pollock Theragra chalcogramma in the southeastern Bering Sea

Variability in brood size and female length of Euphausia pacifica among three populations in the North Pacific

Ecophysiological interpretation of oxygen consumption rates and enzymatic activities of deep-sea copepods

Population growth across heterogeneous environments: effects of harvesting and age structure

Predicting fish recruitment from juvenile abundance and environmental indices

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

Landscape dynamics and resulting species interactions: the cod-capelin system in the southeastern Bering Sea

Modeling carbohydrate ballasting by Trichodesmium spp.

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