Search Results - "Emmett, Robert L."

Predicting habitat to optimize sampling of Pacific sardine (Sardinops sagax) by Zwolinski, Juan P., Emmett, Robert L., Demer, David A.

“…Zwolinski, J. P., Emmett, R. L., and Demer, D. A. 2011. Predicting habitat to optimize sampling of Pacific sardine (Sardinops sagax). – ICES Journal of Marine…”
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Biotic and abiotic factors influencing forage fish and pelagic nekton community in the Columbia River plume (USA) throughout the upwelling season 1999–2009 by Litz, Marisa N C, Emmett, Robert L, Bentley, Paul J, Claiborne, Andrew M, Barcelo, Caren

“…Litz, M. N. C., Emmett, R. L., Bentley, P. J., Claiborne, A. M., and Barceló, C. Biotic and abiotic factors influencing forage fish and pelagic nekton…”
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Anomalous pelagic nekton abundance, distribution, and apparent recruitment in the northern California Current in 2004 and 2005 by Brodeur, Richard D., Ralston, Stephen, Emmett, Robert L., Trudel, Marc, Auth, Toby D., Phillips, A. Jason

“…Although the California Current has undergone substantial environmental shifts in the past few decades, the summer of 2005 exhibited highly anomalous…”
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Biological and physical processes in and around Astoria submarine Canyon, Oregon, USA by Bosley, Keith L., Lavelle, J.William, Brodeur, Richard D., Wakefield, W.Waldo, Emmett, Robert L., Baker, Edward T., Rehmke, Kara M.

“…Astoria Canyon represents the westernmost portion of the Columbia River drainage system, with the head of the canyon beginning just 16 km west of the mouth of…”
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The vertical distribution of juvenile salmon (Oncorhynchus spp.) and associated fishes in the Columbia River plume by Emmett, Robert L., Brodeur, Richard D., Orton, Philip M.

“…Simultaneous trawling at surface and at depth at one location off the Columbia River, Oregon, in June 2000 identified the depth distribution of juvenile…”
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Large medusae in surface waters of the Northern California Current: variability in relation to environmental conditions by Suchman, Cynthia L., Brodeur, Richard D., Daly, Elizabeth A., Emmett, Robert L.

“…Blooms of jellyfish around the world have been correlated with climatic variables related to environmental causes. Sizeable populations of large medusae,…”
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Evidence for selective mortality in marine environments: the role of fish migration size, timing, and production type by Claiborne, Andrew M., Miller, Jessica A., Weitkamp, Laurie A., Teel, David J., Emmett, Robert L.

“…The underlying causes of mortality during critical life stages of fish are not well understood, nor is it clear if these causes are similar for naturally…”
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Size at Release, Size‐Selective Mortality, and Age of Maturity of Willamette River Hatchery Yearling Chinook Salmon by Claiborne, Andrew M., Fisher, Joseph P., Hayes, Sean A., Emmett, Robert L.

“…We analyzed scales from returning Willamette River yearling Chinook salmon Oncorhynchus tshawytscha to explore the effects of size at release on subsequent…”
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Abundance and distribution of pelagic piscivorous fishes in the Columbia River plume during spring/early summer 1998–2003: Relationship to oceanographic conditions, forage fishes, and juvenile salmonids by Emmett, Robert L., Krutzikowsky, Gregory K., Bentley, Paul

“…From 1998 to 2003, we observed large fluctuations in the abundance and distribution of four pelagic predatory (piscivorous) fishes off northern Oregon and…”
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Effect of a Mammal Excluder Device on Trawl Catches of Salmon and Other Pelagic Animals by Wainwright, Thomas C., Emmett, Robert L., Weitkamp, Laurie A., Hayes, Sean A., Bentley, Paul J., Harding, Jeffrey A.

“…Concern about bycatch of marine mammals by fishery research gear has led to the use of mammal excluder devices (MEDs) in some surveys. We measured the effect…”
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Timing of forage fish seasonal appearance in the Columbia River plume and link to ocean conditions by Kaltenberg, Amanda M., Emmett, Robert L., Benoit-Bird, Kelly J.

“…This study described the phenology and patterns of variability of forage fish and mesozooplankton populations near the Columbia River plume. Our objective was…”
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Effects of variable oceanographic conditions on forage fish lipid content and fatty acid composition in the northern California Current by Litz, Marisa N. C., Brodeur, Richard D., Emmett, Robert L., Heppell, Selina S., Rasmussen, Rosalee S., O’Higgins, Linda, Morris, Matthew S.

“…Lipids and fatty acids (FA) were investigated in 4 species of forage fish: northern anchovyEngraulis mordax, Pacific sardineSardinops sagax, Pacific…”
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Nocturnal Feeding of Pacific Hake and Jack Mackerel off the Mouth of the Columbia River, 1998‐2004: Implications for Juvenile Salmon Predation by Emmett, Robert L., Krutzikowsky, Gregory K.

“…Predation by piscivorous marine fishes has been hypothesized to be a primary source of marine mortality for Pacific Northwest juvenile salmon. During the…”
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Species composition and community structure of pelagic nekton off Oregon and Washington under variable oceanographic conditions by Brodeur, Richard D., Fisher, Joseph P., Emmett, Robert L., Morgan, Cheryl A., Casillas, Ed

“…Dramatic changes in the physical and biological conditions off Washington and Oregon, USA, have occurred since 1998, including extreme El Niño (warm) and La…”
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Catching the prey: Sampling juvenile fish and invertebrate prey fields of juvenile coho and Chinook salmon during their early marine residence by Brodeur, Richard D., Daly, Elizabeth A., Benkwitt, Cassandra E., Morgan, Cheryl A., Emmett, Robert L.

“…Marine diets of juvenile coho ( Oncorhynchus kisutch) and Chinook salmon ( Oncorhynchus tshawytscha) in the northern California Current are made up primarily…”
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Conservation status of eulachon in the California Current by Gustafson, Richard G, Ford, Michael J, Adams, Peter B, Drake, Jonathan S, Emmett, Robert L, Fresh, Kurt L, Rowse, Mindy, Spangler, Elizabeth A K, Spangler, Robert E, Teel, David J, Wilson, Matthew T

“…Eulachon (Thaleichthys pacificus), an anadromous smelt in the Northeast Pacific Ocean was examined for listing under the USA’s Endangered Species Act (ESA). A…”
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Columbia River plume fronts: II. Distribution, abundance, and feeding ecology of juvenile salmon by De Robertis, Alex, Morgan, Cheryl A., Schabetsberger, Robert A., Zabel, Richard W., Brodeur, Richard D., Emmett, Robert L., Knight, Carolyn M., Krutzikowsky, Gregory K., Casillas, Edmundo

“…Well-defined fronts develop at the seaward edge of riverine plumes where suspended materials and planktonic organisms are concentrated by convergent water…”
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Onshore-offshore variations in copepod community structure off the Oregon coast during the summer upwelling season by Morgan, Cheryl A., Peterson, William T., Emmett, Robert L.

“…During the summer of 1994, 1996, and 1997, we conducted hydrographic and plankton surveys of the upper 70 m in the nearshore, the continental shelf, and…”
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Ichthyoplankton community in the Columbia River plume off Oregon: effects of fluctuating oceanographic conditions by Parnel, Maria M, Emmett, Robert L, Brodeur, Richard D

“…Effects of fluctuating river flows and nearshore oceanic environmental conditions on the ichthyofaunal community in the Columbia River plume off Oregon, were…”
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Diel differences in surface trawl fish catches off Oregon and Washington by Krutzikowsky, Gregory K., Emmett, Robert L.

“…Surface rope trawls have recently been used to investigate pelagic fish communities off the west coast of North America. We examined surface rope trawl catches…”
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