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ScholarsArchive at Oregon State University
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Mesozooplankton (>200 μm) collected in August and September of 2010 from the northern Gulf of Mexico show evidence of exposure to polycyclic aromatic hydrocarbons (PAHs). Multivariate statistical analysis revealed that distributions of PAHs...
2012-01-14 (iso8601)
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Vocalizations of Indo-Pacific humpback dolphins (Sousa chinensis) in west Hong Kong waters were described from 12 recordings in 2010. A broadband hydrophone system recorded sounds. Vocalizations were characterized as broadband click trains, burst...
2012-01 (iso8601)
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In the present study, the potential of low-melting point lipids, namely methyl
palmitate (MP) and menhaden stearine (MS), were studied for delivery of water-soluble
materials to fish larvae.
Addition of the solid emulsifier, sorbitan monopalmitate...
2002-11-26 (iso8601)
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The number of sites sampled must be considered when determining the effort necessary for adequately assessing taxa richness in an ecosystem for bioassessment purposes; however, there have been few studies concerning the number of sites necessary...
2012-05 (iso8601)
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The distribution of Lahontan cutthroat trout Oncorhynchus clarki henshawi was assessed
in a high-desert stream in southeastern Oregon where beaver Castor canadensis are
abundant. Longitudinal patterns of beaver ponds, habitat, temperature, and...
2002-11-21 (iso8601)
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With increased resource development on the western Arctic coastal plain of Alaska
(especially within the oil extraction industry) it is important to understand the basic
life history attributes of whitefish stocks in the region in order to ensure...
2003-12-19 (iso8601)
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The present study investigated the effects of stress and exercise on
seawater (SW) adaptation and cortisol dynamics in juvenile steelhead
(Oncorhynchus mykiss). To examine the effects of stress, fish acclimated to
freshwater (FW) were subjected...
2004-02-05 (iso8601)
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This thesis focuses upon whether stressful aspects of an organism's
environment are reflected by that organism's shape. It presents an application of the
powerful thin-plate spline and relative warp methods from morphometric analysis
to...
2002-06-14 (iso8601)
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Greater Sage-Grouse (Centrocercus urophasianus) have experienced declines
throughout their range over the last 50 years. Long-term declines in sage-grouse
abundance in Nevada and Oregon have been attributed to reduced productivity. From
1995-1997,...
2002-06-06 (iso8601)
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The current conditions of many seasonally dry forests in the western and southern United States, especially those that once experienced low- to moderate-intensity fire regimes, leave them uncharacteristically susceptible to high-severity wildfire....
2012-06 (iso8601)
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OBJECTIVE. Hospital readmissions are a current target of initiatives to reduce healthcare costs. This study quantified the association between having a clinical culture positive for 1 of 3 prevalent hospital-associated organisms and time to...
2012-05 (iso8601)
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Florida is a hotspot for nonindigenous fishes with over 30 species established, although few of these are small-bodied species. One hypothesis for this pattern is that biotic resistance of native species is reducing the success of small-bodied,...
2012-07 (iso8601)
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Stream restorations that increase geomorphic stability can improve habitat quality, which should benefit selected species and local aquatic ecosystems. This assumption is often used to define primary restoration goals; yet, biological responses to...
2012-07 (iso8601)
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High seroprevalance for Brucella abortus among elk on Wyoming feedgrounds suggests that supplemental feeding may influence parasite transmission and disease dynamics by altering the rate at which elk contact infectious materials in their...
2012-07 (iso8601)
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Water temperature influences almost every biological and physiological process of salmon, including disease resistance. In the Klamath River (California), current thermal conditions are considered sub-optimal for juvenile salmon. In addition to...
2012-06 (iso8601)
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The pigeon guillemot (Cepphus columba) population in Prince William
Sound has failed to recover from declines that occurred both before and after the
Exxon Valdez Oil Spill (EVOS). Post-spill studies of pigeon guillemot breeding
biology have...
2002-10-01 (iso8601)
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Adult dusky Canada geese (Branta canadensis
occidentalis Baird) were banded with plastic neck bands and
observed on the winter range during 1985-92. Annual
survival rates of adult geese estimated from observation
data ranged from 76% to 85%. A...
1993-02-05 (iso8601)
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Many factors should be considered before selecting a graduate program to attend. Graduate education can be expensive, so financial and health care benefits offered by a department or college should be considered when selecting a graduate program....
2012-06 (iso8601)
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Recent emphasis on linkages between essential fish habitat and fish stock productivity
has raised concerns about the management of fishing activities such as trawling, which
have the potential to impact fish habitat. Knowing specifically where and...
2004-04-13 (iso8601)
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The effects of harvesting Pacific hake (Merluccius productus)
were examined with a multi-species numerical model composed of
seven logistic growth equations coupled by a food web. The
food web was composed of: California sea lions (Zalophus...
1994-12-05 (iso8601)
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Many resource management controversies indicate
disagreement about the possible intended and unintended effects
of management actions on ecosystems. Researchers have
documented a variety of negative effects on specific ecosystems, e.
g. the...
1988-06-29 (iso8601)
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Rights-based approaches are potentially promising tools to meet conservation objectives in natural resource management. Here, we evaluated how population status and fishery production respond to catch shares, a rights-based policy instrument in...
2012-06 (iso8601)
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Wild populations of fish are faced with a multitude of stressors, which may
include human interaction, toxins, and disease. Benzo(a)pyrene (BaP), a known
carcinogen and immunotoxin, has been reported in the stomach contents of
juvenile chinook...
2003-05-09 (iso8601)
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