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Large medusae in surface waters of the Northern California Current: variability in relation to environmental conditions

Creator:: Suchman, Cynthia L., Brodeur, Richard D., Daly, Elizabeth A., and Emmett, Robert L.
Abstract:: Blooms of jellyfish around the world have been correlated with climatic variables related to environmental causes. Sizeable populations of large medusae, primarily Chrysaora fuscescens and Aequorea sp., appear annually in shelf waters of the Northeast Pacific Ocean. Previous research has shown that C. fuscescens is abundant seasonally in the inner...
Resource Type:: Article
Full Text:: . Suchman • Richard D. Brodeur • Elizabeth A. Daly • Robert L. Emmett Published online: 15 March 2012

Diet variability of forage fishes in the Northern California Current System

Creator:: Hill, Andrew D., Daly, Elizabeth A., and Brodeur, Richard D.
Abstract:: As fisheries management shifts to an ecosystem-based approach, understanding energy pathways and trophic relationships in the Northern California Current (NCC) will become increasingly important for predictive modeling and understanding ecosystem response to changing ocean conditions. In the NCC, pelagic forage fishes are a critical link between seasonal and interannual variation...
Resource Type:: Article
Full Text:: variability of forage fishes in the Northern California Current System Andrew D. Hill a, Elizabeth A. Daly a

Surface distribution of brachyuran megalopae and ichthyoplankton in the Columbia River plume during transition from downwelling to upwelling conditions

Creator:: Roegner, G. Curtis, Daly, Elizabeth A., and Brodeur, Richard D.
Abstract:: In the California Current coastal boundary zone, the spring transition between downwelling and upwelling conditions, along with the fluctuating structure of the Columbia River plume, creates highly dynamic interactions. In this study, we investigated whether the surface distribution of brachyuran larvae and ichthyoplankton would track the dynamics of the Columbia...
Resource Type:: Article
Full Text:: during transition from downwelling to upwelling conditions G. Curtis Roegner a,n, Elizabeth A. Daly b

Ontogenetic shifts in diets of juvenile and subadult coho and chinook salmon in coastal marine waters: important for marine survival?

Creator:: Daly, Elizabeth A., Brodeur, Richard D., and Weitkamp, Laurie A.
Abstract:: Successfully shifting to a more piscivorous diet may be an important factor in the growth and survival of juvenile coho salmon Oncorhynchus kisutch and Chinook salmon O. tshawytscha during their first summer in the northern California Current. Nonmetric multidimensional scaling and cluster analysis of diets by size showed several distinct...
Resource Type:: Article
Full Text:: Marine Survival? Elizabeth A. Daly a , Richard D. Brodeur b & Laurie A. Weitkamp b a Cooperative

Winter ichthyoplankton biomass as a predictor of early summer prey fields and survival of juvenile salmon in the northern California Current

Creator:: Daly, Elizabeth A., Auth, Toby D., Brodeur, Richard D., and Peterson, William T.
Abstract:: Diets of juvenile coho Oncorhynchus kisutch and Chinook O. tshawytscha salmon are made up primarily of winter-spawning fish taxa in the late-larval and early juvenile stages that are undersampled in plankton and larger trawl nets. Although we have no direct measure of the availability of fish prey important to juvenile...
Resource Type:: Article
Full Text:: northern California Current Elizabeth A. Daly1,*, Toby D. Auth2, Richard D. Brodeur3, William T. Peterson3

Spatial overlap between forage fishes and the large medusa Chrysaora fuscescens in the northern California Current region

Creator:: Brodeur, Richard D., Barceló, Caren, Robinson, Kelly L., Daly, Elizabeth A., and Ruzicka, James J.
Abstract:: As in many regions of the world, the shelf waters of the western United States have experienced large increases and high interannual variability in jellyfish populations in recent decades. The northern California Current (NCC) is a productive upwelling zone that is home to large populations of medusae, particularly during some...
Resource Type:: Article
Full Text:: California Current region Richard D. Brodeur1,*, Caren Barceló2, Kelly L. Robinson3, Elizabeth A. Daly4

Environmental drivers and reproductive consequences of variation in the diet of a marine predator

Creator:: Gladics, Amanda J., Suryan, Robert M., Parrish, Julia K., Horton, Cheryl A., Daly, Elizabeth A., and Peterson, William T.
Abstract:: Ocean conditions can greatly impact lower trophic level prey assemblages in marine ecosystems, with effects of ocean state propagating to higher trophic levels. In many regions throughout their range, common murre (Uria aalge) exhibit narrow dietary breadth in feeding chicks and therefore are vulnerable to recruitment failures of dominant prey...
Resource Type:: Article
Full Text:: . Gladics a,b,⁎, Robert M. Suryan b, Julia K. Parrish c, Cheryl A. Horton b, Elizabeth A. Daly d, William T

Multivariate Models of Adult Pacific Salmon Returns

Creator:: Burke, Brian J., Peterson, William T., Beckman, Brian R., Morgan, Cheryl, Daly, Elizabeth A., and Litz, Marisa
Abstract:: Most modeling and statistical approaches encourage simplicity, yet ecological processes are often complex, as they are influenced by numerous dynamic environmental and biological factors. Pacific salmon abundance has been highly variable over the last few decades and most forecasting models have proven inadequate, primarily because of a lack of understanding...
Resource Type:: Article
Full Text:: Returns Brian J. Burke1*, William T. Peterson2, Brian R. Beckman3, Cheryl Morgan4, Elizabeth A. Daly4

Spatial and trophic overlap of marked and unmarked Columbia River Basin spring Chinook salmon during early marine residence with implications for competition between hatchery and naturally produced fish

Creator:: Daly, Elizabeth A., Brodeur, Richard D., Fisher, Joseph P., Weitkamp, Laurie A., Teel, David J., and Beckman, Brian R.
Abstract:: Ecological interactions between natural and hatchery juvenile salmon during their early marine residence, a time of high mortality, have received little attention. These interactions may negatively influence survival and hamper the ability of natural populations to recover. We examined the spatial distributions and size differences of both marked (hatchery) and...
Resource Type:: Article
Full Text:: between hatchery and naturally produced fish Elizabeth A. Daly & Richard D. Brodeur & Joseph P. Fisher

Juvenile Steelhead Distribution, Migration, Feeding, and Growth in the Columbia River Estuary, Plume, and Coastal Waters

Creator:: Daly, Elizabeth A., Scheurer, Julie A., Brodeur, Richard D., Weitkamp, Laurie A., Beckman, Brian R., and Miller, Jessica A.
Abstract:: Relative to extensive research on the freshwater stages of steelhead Oncorhynchus mykiss life history, little is known about the species’ estuarine and early marine phases despite the decline of numerous populations, including several from the Columbia River. Comparisons of the distribution, diet, and growth of juvenile steelhead collected during surveys...
Resource Type:: Article
Full Text:: Elizabeth A. Daly* Cooperative Institute for Marine Resources Studies, Oregon State University, Hatfield

State of the California Current 2014-15: Impacts of the Warm-Water "Blob"

Creator:: Leising, Andrew W., Schroeder, Isaac D., Bograd, Steven J., Abell, Jeffrey, Durazo, Reginaldo, Gaxiola-Castro, Gilberto, Bjorkstedt, Eric P., Field, John, Sakuma, Keith, Robertson, Roxanne R., Goericke, Ralf, Peterson, William T., Brodeur, Ric, Barceló, Caren, Auth, Toby D., Daly, Elizabeth A., Suryan, Robert M., Gladics, Amanda J., Porquez, Jessica M., McClatchie, Sam, Weber, Edward D., Watson, William, Santora, Jarrod A., Sydeman, William J., Melin, Sharon R., Chavez, Francisco P., Golightly, Richard T., Schneider, Stephanie R., Fisher, Jennifer, Morgan, Cheryl, Bradley, Russell, and Warybok, Peter
Abstract:: In 2014, the California Current (~28˚–48˚N) saw average, or below average, coastal upwelling and relatively low productivity in most locations, except from 38˚–43˚N during June and July. Chlorophyll-a levels were low throughout spring and summer at most locations, except in a small region around 39˚N. Catches of juvenile rockfish (an...
Resource Type:: Article
Full Text:: , or 97330 toBy d. AUth1,eLizABeth A. dALy2 1Pacific states Marine Fisheries commission hatfield

ScholarsArchive@OSU

Large medusae in surface waters of the Northern California Current: variability in relation to environmental conditions

Diet variability of forage fishes in the Northern California Current System

Surface distribution of brachyuran megalopae and ichthyoplankton in the Columbia River plume during transition from downwelling to upwelling conditions

Ontogenetic shifts in diets of juvenile and subadult coho and chinook salmon in coastal marine waters: important for marine survival?

Winter ichthyoplankton biomass as a predictor of early summer prey fields and survival of juvenile salmon in the northern California Current

Spatial overlap between forage fishes and the large medusa Chrysaora fuscescens in the northern California Current region

Environmental drivers and reproductive consequences of variation in the diet of a marine predator

Multivariate Models of Adult Pacific Salmon Returns

Spatial and trophic overlap of marked and unmarked Columbia River Basin spring Chinook salmon during early marine residence with implications for competition between hatchery and naturally produced fish

Juvenile Steelhead Distribution, Migration, Feeding, and Growth in the Columbia River Estuary, Plume, and Coastal Waters

State of the California Current 2013-14: El Niño Looming

BarceloCarenCEOASStateCaliforniaCurrent.pdf

BarceloCarenCEOASStateCaliforniaCurrentSupplement.pdf

State of the California Current 2012–13: No Such Thing as an "Average" Year

State of the California Current 2014-15: Impacts of the Warm-Water "Blob"

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