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Thermal reaction norms for growth vary among cohorts of Pacific cod (Gadus macrocephalus)

Creator:: Hurst, Thomas P., Munch, Stephan B., and Lavelle, Kate A.
Abstract:: While much effort has been directed at determining the spatial scales of adaptation in thermal reaction norms for growth, it is widely assumed that these reaction norms have high temporal stability. Water temperatures in the Gulf of Alaska in 2007 were the coldest on record since the mid-1970s and we...
Resource Type:: Article
Full Text:: vary among cohorts of Pacific cod (Gadus macrocephalus) Thomas P. Hurst • Stephan B. Munch • Kate A

Errors in juvenile copepod growth rate estimates are widespread: problems with the Moult Rate method

Creator:: Hirst, A. G., Peterson, William T., and Rothery, P.
Abstract:: The Moult Rate (MR) method has been used widely to derive stage-specific growth rates in juvenile copepods. It is the most common field-based method. Unfortunately, the equation underlying the method is wrong and, consequently, large errors in juvenile growth rate estimates are widespread. The equation derives growth from the mean...
Resource Type:: Article
Full Text:: rate estimates are widespread: problems with the Moult Rate method A. G. Hirst1,*, W. T. Peterson2

Growth, survival, and habitat use of naturally reared and hatchery steelhead fry in streams: effects of an enriched hatchery rearing environment

Creator:: Tatara, Christopher P., Riley, Stephen C., and Scheurer, Julie A.
Abstract:: After hatchery-reared salmonids are released into the wild, their survival and performance are frequently lower than those of wild conspecifics. Additionally, negative effects of hatchery fish on wild fish are cited as factors affecting the recovery of salmonid populations. Alternative hatchery rearing environments and release practices have been proposed to...
Resource Type:: Article
Full Text:: : Effects of an Enriched Hatchery Rearing Environment Christopher P. Tatara a , Stephen C. Riley b & Julie A

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

Species composition and community structure of pelagic nekton off Oregon and Washington under variable oceanographic conditions

Creator:: Brodeur, Richard D., Fisher, Joseph P., Emmett, Robert L., Morgan, Cheryl A., and Casillas, Ed
Abstract:: Dramatic changes in the physical and biological conditions off Washington and Oregon, USA, have occurred since 1998, including extreme El Niño (warm) and La Niña (cool) years, high and low Columbia River flow years, a major intrusion of subarctic water, and a low oxygen event on the shelf. The occurrence...
Resource Type:: Article
Full Text:: Richard D. Brodeur1,*, Joseph P. Fisher2, Robert L. Emmett1, Cheryl A. Morgan3, Ed Casillas4 1Northwest

Diel Feeding Chronology, Gastric Evacuation, and Daily Food Consumption of Juvenile Chinook Salmon in Oregon Coastal Waters

Creator:: Benkwitt, Cassandra E., Brodeur, Richard D., Hurst, Thomas P., and Daly, Elizabeth A.
Abstract:: The diel feeding periodicity of juvenile Chinook salmon Oncorhynchus tshawytscha was determined from stomachs collected in coastal waters off Oregon in 2000 and 2003. Juvenile Chinook salmon exhibited a diurnal feeding pattern with morning and evening feeding periods. There were differences in the duration and magnitude of the dawn and...
Resource Type:: Article
Full Text:: Waters Cassandra E. Benkwitt a , Richard D. Brodeur b , Thomas P. Hurst c & Elizabeth A. Daly d a

Estimating minke whale (Balaenoptera acutorostrata) boing sound density using passive acoustic sensors

Creator:: Martin, Stephen W., Marques, Tiago A., Thomas, Len, Morrissey, Ronald P., DiMarzio, Nancy, Moretti, David, Mellinger, David K., and Jarvis, Susan
Abstract:: Density estimation for marine mammal species is performed primarily using visual distance sampling or capture-recapture. Minke whales in Hawaiian waters are very difficult to sight; however, they produce a distinctive “boing” call, making them ideal candidates for passive acoustic density estimation. We used an array of 14 bottom-mounted hydrophones, distributed...
Resource Type:: Article
Full Text:: estimated mean probability of detecting the cue over the area surveyed ( P̂ ), the area surveyed (A), and

Infectivity of a rickettsia isolated from coho salmon Oncorhynchus kisutch

Creator:: Garces, L. H., Larenas, J. J., Smith, P. A., Sandino, S., Lannan, C. N., and Fryer, J. L.
Abstract:: Two species of salmonids were tested for their susceptibility to infection by a rickettsia isolated in cell culture from diseased coho salmon Oncorhynchus kisutch in Chile. Mortality approached 100% in coho and Atlantic salmon Salmo salar injected with 10-fold dilutions of cell culture medium containing the rickettsia. Typical disease signs...
Resource Type:: Article
Full Text:: 18 (1). 1-2 Fryer, J. L., Lannan, C. N., Garces, L. H. , Larenas. J. J., Smlth. P. A. (1990

Survey of Pathogens in Hatchery Chinook Salmon with Different Out-Migration Histories through the Snake and Columbia Rivers

Creator:: Van Gaest, Ahna L., Dietrich, Joseph P., Thompson, D. E., Boylen, Deborah A., Strickland, Stacy A., Collier, T. K., Loge, F. J., and Arkoosh, Mary R.
Abstract:: The operation of the Federal Columbia River Power System (FCRPS) has negatively affected threatened and endangered salmonid populations in the Pacific Northwest. Barging Snake River spring Chinook salmon Oncorhynchus tshawytscha through the FCRPS is one effort to mitigate the effect of the hydrosystem on juvenile salmon out-migration. However, little is...
Resource Type:: Article
Full Text:: Rivers A. L. Van Gaest a , J. P. Dietrich a , D. E. Thompson b , D. A. Boylen a , S. A. Strickland a , T

Flux measurements of explosive degassing using a yearlong hydroacoustic record at an erupting submarine volcano

Creator:: Dziak, R. P., Baker, E. T., Shaw, A. M., Bohnenstiehl, D. R., Chadwick, W. W., Jr., Haxel, J. H., Matsumoto, H., and Walker, S. L.
Abstract:: The output of gas and tephra from volcanoes is an inherently disorganized process that makes reliable flux estimates challenging to obtain. Continuous monitoring of gas flux has been achieved in only a few instances at subaerial volcanoes, but never for submarine volcanoes. Here we use the first sustained (yearlong) hydroacoustic...
Resource Type:: Article
Full Text:: of explosive degassing using a yearlong hydroacoustic record at an erupting submarine volcano R. P

ScholarsArchive@OSU

Thermal reaction norms for growth vary among cohorts of Pacific cod (Gadus macrocephalus)

Errors in juvenile copepod growth rate estimates are widespread: problems with the Moult Rate method

Growth, survival, and habitat use of naturally reared and hatchery steelhead fry in streams: effects of an enriched hatchery rearing environment

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

Species composition and community structure of pelagic nekton off Oregon and Washington under variable oceanographic conditions

Diel Feeding Chronology, Gastric Evacuation, and Daily Food Consumption of Juvenile Chinook Salmon in Oregon Coastal Waters

Estimating minke whale (Balaenoptera acutorostrata) boing sound density using passive acoustic sensors

Infectivity of a rickettsia isolated from coho salmon Oncorhynchus kisutch

Survey of Pathogens in Hatchery Chinook Salmon with Different Out-Migration Histories through the Snake and Columbia Rivers

Flux measurements of explosive degassing using a yearlong hydroacoustic record at an erupting submarine volcano

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