Index Catalog // ScholarsArchive@OSU

What sets lower limits to phytoplankton stocks in high-nitrate, low-chlorophyll regions of the open ocean?

Creator:: Strom, Suzanne L., Miller, Charles B., and Frost, Bruce W.
Abstract:: Phytoplankton biomass in high-nitrate, low-chlorophyll (HNLC) ocean regions exhibits a pronounced stability: variation occurs only within a narrow range of values. The magnitude of this variation has profound ecological and geochemical consequences. While mechanisms believed to set the upper limits to HNLC phytoplankton biomass (iron limitation, microherbivore grazing) have received...
Resource Type:: Article
Full Text:: , low-chlorophyll regions of the open ocean? Suzanne L. S t r o m l . * , Charles B. ill er

Abundance and grazing effects of Cyclosalpa bakeri in the subarctic Pacific

Creator:: Madin, L. P., Purcell, J. E., and Miller, Charles B.
Abstract:: Ecological effects of populations of the salp Cyclosalpa bakeri were studied in late summer of 1984, 1987 and 1988 dunng the Subarctic Pacific Ecosystem Research Station P in the northeast Pacific. Salps occurred largely in the top 60 m, with from 76 to 3621 mg C m⁻². Three approaches were...
Resource Type:: Article
Full Text:: several liters h-' individual-l, and the capability of removing particles down to a few pm in size

Stage duration estimation for Calanus populations, a modelling study

Creator:: Miller, Charles B. and Tande, Kurt S.
Abstract:: Population dynamics of Calanus finmarchicus have been modelled using very finely divided representation of the stock according to age-within-stage, in the manner of models developed by C. S. Davis, A. Sciandra, F. Carlotti and others. A key assumption of the model is that development rate is relatively insensitive to food-limitation,...
Resource Type:: Article
Full Text:: Charles B. Miller1, Kurt S. Tande2 ' College of Oceanic and Atmospheric Sciences, Oregon State

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

Phenology in Calanus funmarchicus; hypotheses about control mechanisms

Creator:: Miller, Charles B., Cowles, Timothy J., Wiebe, Peter H., Copley, Nancy J., and Grigg, Helen
Abstract:: Calanus finmarchicus (Gunnerus) stratify narrowly near 500 m depth during their fifth copepodite resting phase in North Atlantic Slope Water off southern New England, USA. They probably achieve this by migration to a specific, daytime isolume. Photoperiod information provided by light intensity at depth could serve as a cure for...
Resource Type:: Article
Full Text:: Charles B. ille er', Timothy J. ~ o w l e s ' , Peter H. w i e b e 2 , Nancy J. copley2, Helen ~ r i g

Environmental factors influencing larval walleye pollock Theragra chalcogramma feeding in Alaskan waters

Creator:: Porter, Steven M., Ciannelli, Lorenzo, Hillgruber, Nicola, Bailey, Kevin Mclean, Chan, Kung-Sik, Canino, Michael F., and Haldorson, Lew J.
Abstract:: This study examines potential interactions among the environmental variables likely to affect larval walleye pollock Theragra chalcogramma feeding in the sea. Walleye pollock larvae were sampled from Shelikof Strait, Gulf of Alaska, and from the eastern Bering Sea, with corresponding environmental data. Variables used in our study were time spent...
Resource Type:: Article
Full Text:: Steven M. Porter1,*, Lorenzo Ciannelli2, Nicola Hillgruber3, Kevin M. Bailey1, Kung-Sik Chan4, Michael F

Behavior of juvenile bluefish Pomatomus saltatrix in vertical thermal gradients: influence of season, temperature acclimation and food

Creator:: Olla, Bori L., Studholme, Anne L., and Bejda, Allen J.
Abstract:: Behavioral responses of juvenile bluefish P. saltatrix L. exposed to cold water in a vertical thermal gradient were measured under controlled laboratory conditions. The temperature regime was similar to conditions that these fish encounter in their inshore and estuarine habitats along the Middle Atlantic coast. Measures included activity, schooling, position...
Resource Type:: Article
Full Text:: temperature of some salmonids. J . Fish. Res. Bd Can. 24: 1515-1519 Kendall, A. W., Jr., Walford, L. A

Experimental evidence of fatty acid limited growth and survival in Pacific cod larvae

Creator:: Copeman, L. A. and Laurel, B. J.
Abstract:: Changing environmental conditions in the North Pacific are altering the lipid/fatty acid (FA) composition of zooplankton assemblages, but the consequences to resident fish larvae are unknown. In the laboratory, we reared Pacific cod Gadus macrocephalus larvae over 4 wk on prey enriched with varying levels of 2 essential FAs (docosahexaenoic...
Resource Type:: Article
Full Text:: : lcopeman@mun.ca Experimental evidence of fatty acid limited growth and survival in Pacific cod larvae L

Settlement patterns of young-of-the-year rockfish among six Oregon estuaries experiencing different levels of human development

Creator:: Dauble, Alison D., Heppell, Scott A., and Johansson, Mattias L.
Abstract:: In the US Pacific Northwest, rockfishes Sebastes spp. have recently become a focus for increased management efforts; several species are currently managed under extreme conservation measures due to low population levels and intense fishing pressure. Rockfish recruitment is extremely variable, and a better understanding of the factors influencing recruitment and...
Resource Type:: Article
Full Text:: development Alison D. Dauble1,3,*, Scott A. Heppell1, Mattias L. Johansson2,4 1Oregon State University

Geographically and environmentally driven spawning distributions of tuna species in the western Mediterranean Sea

Creator:: Reglero, Patricia, Ciannelli, Lorenzo, Alvarez-Berastegui, D., Balbin, R., Lopez-Jurado, J. L., and Alemany, F.
Abstract:: The spawning habitats of many large marine pelagic predators are poorly known. This lack of knowledge hampers conservation efforts that are aimed at identifying critical habitats for the spawning of these species. We hypothesized that phylogenetically related species show different adaptations and respond differently to environmental and geographical cues for...
Resource Type:: Article
Full Text:: distributions of tuna species in the western Mediterranean Sea P. Reglero1,*, L. Ciannelli2, D. Alvarez

ScholarsArchive@OSU

What sets lower limits to phytoplankton stocks in high-nitrate, low-chlorophyll regions of the open ocean?

Abundance and grazing effects of Cyclosalpa bakeri in the subarctic Pacific

Stage duration estimation for Calanus populations, a modelling study

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

Phenology in Calanus funmarchicus; hypotheses about control mechanisms

Environmental factors influencing larval walleye pollock Theragra chalcogramma feeding in Alaskan waters

Behavior of juvenile bluefish Pomatomus saltatrix in vertical thermal gradients: influence of season, temperature acclimation and food

Experimental evidence of fatty acid limited growth and survival in Pacific cod larvae

Settlement patterns of young-of-the-year rockfish among six Oregon estuaries experiencing different levels of human development

Geographically and environmentally driven spawning distributions of tuna species in the western Mediterranean Sea

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