Index Catalog // ScholarsArchive@OSU

Linking Moral Obligations, Assumption-based Research, and Structured Decision Making to Inform Bull Trout Recovery

Creator:: Brignon, William R.
Abstract:: More than 1500 species of plants and animals in the United States are listed as threatened or endangered under the Endangered Species Act (ESA). The U.S. Departments of Interior and Commerce are required, under Section 4(f)(1) of the ESA, to develop recovery plans for ESA-listed species under the respective agency...
Resource Type:: Dissertation
Full Text:: . ©Copyright by William R. Brignon August 16, 2016 All Rights Reserved Linking Moral Obligations

Habitat selection of hatchery and wild juvenile salmonids in Eagle Creek Basin, Oregon

Creator:: Brignon, William R.
Abstract:: To best manage Eagle Creek National Fish Hatchery and minimize any negative impacts that the current hatchery program may be having on Endangered Species Act-listed salmonids in the Eagle Creek Basin, I determined if wild fish are being displaced from preferred habitats by hatchery salmonids Oncorhynchus spp. This thesis had...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF William R. Brignon

Factors influencing density, distribution, and mesohabitat selection of juvenile wild salmonids and residual hatchery winter steelhead

Creator:: Brignon, William R., Olson, Douglas E., Schaller, Howard A., and Schreck, Carl B.
Abstract:: To best manage Eagle Creek National Fish Hatchery, negative interactions between hatchery salmonids and Endangered Species Act listed wild salmonids in the Eagle Creek Basin need to be minimized. Our objectives were: 1) to compare summer rearing densities in two similar streams, where one stream received a release of hatchery...
Resource Type:: Article
Full Text:: selection of juvenile wild salmonids and residual hatchery winter steelhead William R. Brignon a,b

Use of snags by birds, Douglas-fir region, western Oregon

Creator:: Mannan, R. William
Resource Type:: Masters Thesis

Bird populations and vegetation characteristics in managed and old-growth forests, northeastern Oregon

Creator:: Mannan, R. William
Resource Type:: Dissertation

Agricultural land use and macroinvertebrate assemblages in lowland temporary streams of the Willamette Valley, Oregon, USA

Creator:: Gerth, William J., Li, Judith, and Giannico, Guillermo R.
Abstract:: Streams that dry during part of the year are common throughout the world, yet studies of the macroinvertebrate assemblages in these types of streams are rare compared to those in permanent streams; and studies that assess the effects of agriculture on temporary stream invertebrates are even rarer. We studied macroinvertebrate...
Resource Type:: Article

Timing of Population Fragmentation in a Vulnerable Minnow, the Umpqua Chub, and the Role of Nonnative Predators

Creator:: O’Malley, Kathleen G., Markle, Douglas F., and Ardren, William R.
Abstract:: We examined the distribution of Umpqua Chub Oregonichthys kalawatseti, an endemic, vulnerable minnow in western Oregon, and whether six ecological populations (based on distribution patterns) had sufficient genetic cohesion to be considered evolutionary populations. We also evaluated the influence of Holocene geological events and recent nonnative predator introductions on the...
Resource Type:: Article
Full Text:: a , Douglas F. Markle b & William R. Ardren c a Coastal Oregon Marine Experiment Station, Hatfield

Comparing streambed light availability and canopy cover in streams with old-growth versus early-mature riparian forests in western Oregon

Creator:: Warren, Dana R., Keeton, William S., Bechtold, Heather A., and Rosi-Marshall, Emma J.
Abstract:: Light availability strongly influences stream primary production, water temperatures and resource availability at the base of stream food webs. In headwater streams, light is regulated primarily by the riparian forest, but few studies have evaluated the influence of riparian forest stand age and associated structural differences on light availability. In...
Resource Type:: Article
Full Text:: in western Oregon 2 3 Dana R. Warren1*, William S. Keeton2, Heather A. Bechtold3, Emma J. Rosi

Pleuronectid production system and its fishery : annual report 1976 for poject No. R/OPF-1

Creator:: Carey, A. G., Demory, R. L., Pearcy, William G., Richardson, S. L., Tyler, A. V., Warren, C. E., and Oregon State University. Sea Grant College Program
Resource Type:: Technical Report
Full Text:: Project No. R/OPF-1 PLEURONECTID PRODUCTION SYSTEM AND ITS FISHERY Date initiated: 1 July 75 Estimated

Characterizing coal and mineral mines as a regional source of stress to stream fish assemblages

Creator:: Daniel, Wesley M., Infante, Dana M., Hughes, Robert M., Tsang, Yin-Phan, Esselman, Peter C., Wieferich, Daniel, Herreman, Kyle, Cooper, Arthur R., Wang, Lizhu, and Taylor, William W.
Abstract:: Mining impacts on stream systems have historically been studied over small spatial scales, yet investigations over large areas may be useful for characterizing mining as a regional source of stress to stream fishes. The associations between co-occurring stream fish assemblages and densities of various “classes” of mining occurring in the...
Resource Type:: Article
Full Text:: source of stress to stream fish assemblages Daniel, W. M., Infante, D. M., Hughes, R. M., Tsang, Y. P

ScholarsArchive@OSU

Linking Moral Obligations, Assumption-based Research, and Structured Decision Making to Inform Bull Trout Recovery

Habitat selection of hatchery and wild juvenile salmonids in Eagle Creek Basin, Oregon

Factors influencing density, distribution, and mesohabitat selection of juvenile wild salmonids and residual hatchery winter steelhead

Use of snags by birds, Douglas-fir region, western Oregon

Bird populations and vegetation characteristics in managed and old-growth forests, northeastern Oregon

Agricultural land use and macroinvertebrate assemblages in lowland temporary streams of the Willamette Valley, Oregon, USA

Timing of Population Fragmentation in a Vulnerable Minnow, the Umpqua Chub, and the Role of Nonnative Predators

Comparing streambed light availability and canopy cover in streams with old-growth versus early-mature riparian forests in western Oregon

Pleuronectid production system and its fishery : annual report 1976 for poject No. R/OPF-1

Characterizing coal and mineral mines as a regional source of stress to stream fish assemblages

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