Multiple analytical techniques were used to evaluate the impact of multiple parasite species on
the mortality of threatened juvenile coho salmon (Oncorhynchus kisutch) from the West Fork Smith
River, Oregon, USA. We also proposed a novel parsimonious mathematical representation of
macroparasite distribution, congestion rate, which i) is easier to use...
We quantified the juvenile rearing and migratory patterns of individuals from a population of fall-spawning Chinook salmon Oncorhynchus tshawytscha in Oregon's Salmon River estuary using otolith microchemistry and microstructure. The study confirmed the daily periodicity of otolith growth increments in a natural fish population under field conditions and validated fundamental...
Pacific cod (Gadus macrocephalus)is an important component of fisheries and food webs in the North Pacific Ocean and Bering Sea. However, vital rates of early life stages of this species have yet to be described in detail. We determined the thermal sensitivity of growth rates of embryos, pref lexion and...
Automatic transfer of learned knowledge from one task or domain to another offers great potential to simplify and expedite
the construction and deployment of intelligent systems.
In practice however, there are many barriers to achieving this
goal. In this article, we present a prototype system for the
real-world context of...
The coded wire tag (CWT) database contains detailed information on millions of Pacific salmon
Oncorhynchus spp. released from hatcheries or smolt traps and recovered in the north Pacific Ocean and its tributaries. I used this data set to examine the spatial and temporal variation in the marine distributions of 77...
Focus group methodology was used to investigate graduate students' cross-campus technology, space and service needs. Although the library provides valued services and spaces, graduate students need enhanced and more equitable support for their roles as teachers and scholars. Librarians can provide leadership and act as advocates for graduate student needs...
Changes in the field of publishing and in scholarly communication have been impacting the distribution of scientific knowledge for years. The economics of publishing continues to have an impact on subscribers’ ability to maintain access and therefore the readership of established publications may diminish or look for legitimate alternatives to...
We tracked three groups of steelhead Oncorhynchus mykiss smolts implanted with acoustic transmitters to determine whether the degree of hatchery domestication or the juvenile rearing environment (hatchery raceway versus natural stream) influenced migration timing and survival in the Alsea River and estuary, Oregon. Two groups consisted of age-1 smolts reared...
Pacific rockfish experience high discard mortality when captured owing to a condition called barotrauma,which is caused by the change in pressure during capture. This condition appears to be species specific at the macroscopic level; however, little is known about the microscopic tissue-level effects of barotrauma. Determining whether tissue-level injuries are...
Batrachochytrium dendrobatidis (hereafter Batrachochytrium), a fungal pathogen of amphibians, causes the disease chytridiomycosis which is responsible for unprecedented population declines and extinctions globally. Host defenses against chytridiomycosis include cutaneous symbiotic bacteria and anti-microbial peptides, and proposed treatment measures include use of fungicides and bioaugmentation. Efforts to eradicate the fungus from...
Filled skutterudites are promising thermoelectric materials due to reduced thermal
conductivity upon inserting a guest atom or 'rattler' into the CoSb₃ structure. By using an
indium rattler dimensionless Figure of Merit (ZT) values > 1 at 650 K have been reported.
The conventional synthesis of these compounds typically takes several...
A replicated before–after-control-impact study was used to test effectiveness of Oregon’s (USA) riparian
protection measures at minimizing increases in summer stream temperature associated with timber harvest.
Sites were located on private and state forest land. Practices on private forests require riparian management
areas around fish-bearing streams; state forest’s prescriptions are...
The effect of quasi-hydrostatic pressure upon the ferromagnetic ground state of magnetodielectric, double-
perovskite La₂ MnNiO₆ is investigated using x-ray absorption spectroscopy and diffraction measurements in a
diamond anvil cell. The Mn-O-Ni superexchange interaction that gives rise to ferromagnetism in this cation-
ordered structure is stable to at least 38...
Satellite observations have revealed a remarkably strong positive correlation between sea surface temperature (SST) and surface winds on oceanic mesoscales of 10–1000 km. Although SST influence on the atmosphere had previously been identified from several in situ observational studies, its widespread existence in regions of strong SST gradients throughout the...
Oregon’s forested coastal watersheds support important cold-water fisheries of salmon
and steelhead (Oncorhynchus spp.) as well as forestry-dependent local economies. Riparian
timber harvest restrictions in Oregon and elsewhere are designed to protect stream habitat
characteristics while enabling upland timber harvest. We present an assessment of riparian
leave tree rule effectiveness...
Most of the kinetic energy of ocean circulation is contained in ubiquitous
mesoscale eddies. Their prominent signatures in sea surface height have rendered satellite
altimetry highly effective in observing global ocean eddies. Our knowledge of ocean eddy
dynamics has grown by leaps and bounds since the advent of satellite altimetry...
Wetland‐estuarine‐shelf interaction processes in the Plum Island Sound and Merrimack River system in the Massachusetts coast are examined using the high‐resolution
unstructured grid, finite volume, primitive equations, coastal ocean model. The
computational domain covers the estuarine and entire intertidal area with a horizontal
resolution of 10–200 m. Driven by five...
Comprehensive observations of velocity, density, and
turbulent dissipation permit quantification of the nonlinear
internal wave (NLIW) contribution to vertical heat flux and
lateral mass transport over New Jersey’s shelf. The effect of
NLIWs on the shelf heat budget was significant. On
average, heat flux in NLIWs was 10 times larger...
Three‐dimensional circulation in the coastal transition zone (CTZ) off Oregon is
studied using a 3 km resolution model based on the Regional Ocean Modeling System.
The study period is spring and summer 2002, when extensive observations were available
from the northeastern Pacific component of the Global Ocean Ecosystems Dynamics
project....
The tidally varying circulation, stratification, and salt flux mechanisms are
investigated in a shallow salt wedge estuary where fluvial and tidal velocities are large and
the steady baroclinic circulation is comparatively weak. The study integrates field
observations and numerical simulations of the Merrimack River estuary. At moderate to
high discharge...