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The chronic toxicity of 2,3,7,8-tetra-chlorodibenzo-p-dioxin (TCDD) to five selected aquatic organisms

Creator:: Miller, Richard A.
Abstract:: Five species of aquatic organisms were exposed to TCDD. Lethal effects of initial exposure to coho salmon of 23.4 nanogram TCDD/gram fish wet weight (23.4 ng/g), or equivalent to 100 nanogram per liter (100 ng/l) TCDD in water, for 24 hours were irreversible; 95% mortality occurred in 60 days. Exposure...
Resource Type:: Masters Thesis
Full Text:: by Richard Arlen Miller A THESIS submitted to Oregon State University in partial fulfillment of

Analysis of a ³²P material balance method for measuring periphyton production in flowing water

Creator:: Gregory, Stanley Vincent
Abstract:: The ³²P material balance method for measuring periphyton production and grazing rates on periphyton in streams developed by Elwood and Nelson (1972) was evaluated by laboratory and field experiments. Three basic assumptions of the method were examined: 1) sloughing of periphyton from substrates is negligible, 2) sorption of ³²P onto...
Resource Type:: Masters Thesis
Full Text:: activity, which was a function 32of residence time of the leaves in the stream. Recycling of P into

A genetic study of the red-band trout (Salmo sp.)

Creator:: Wilmot, Richard L.
Abstract:: A group of trout that reside in streams of the desiccating lake basins of southeastern Oregon differ markedly from other known Salmo. Known commonly as the red-band trout, this fish was subjected to chromosome analysis for comparison with other species of western North American Salmo. The karyotype of the red-banded...
Resource Type:: Dissertation
Full Text:: . 29) Three-Mile Creek 72 0 0 1. 0 0 72 Allele PGM-2 phenotypes frequency AA AB BB A B N X2 P of X2

Population characteristics and habitat utilization of bighorn sheep, Steens Mountain, Oregon

Creator:: Van Dyke, Walter A.
Abstract:: A herd of re-introduced California bighorn sheep (Ovis canadensis californiana) was studied from 15 June 1976 to 31 August 1977. Thirteen major and seven minor habitats were delineated and described. Habitat use by bighorns was observed throughout the study and a habitat preference value (H.P.V.) was calculated based on use...
Resource Type:: Masters Thesis
Full Text:: am grateful to my committee members - D. S. deCalesta, A. H. Winward, and T. P. Kistner, for their

An analysis of avian communities on a dredged material island

Creator:: Edwards, Daniel K.
Resource Type:: Masters Thesis
Full Text:: study site, Miller Sands, a dredged material island, was located approximately 19 km east of Astoria in

Transferrin variation and population differentiation in black-tailed deer

Creator:: Chinn, Edwin Kan Kit
Abstract:: Transferrin of Columbian black-tailed deer (Odocoileus hemionus columbianus) displayed two types of polymorphism. One type involved differences in sialic acid content. The nature of the other polymorphism is not known. A hypothesis for three codominant alleles at a common locus was proposed and tested by using the Hardy-Weinberg Principle. The...
Resource Type:: Masters Thesis
Full Text:: by starch gel electrophoresis a useful tool of the systematist. IT Miller etal. (1965) studied

Population ecology of the Columbian white-tailed deer

Creator:: Gavin, Thomas Alan
Abstract:: A population of Columbian white-tailed deer (CWTD) was studied on a refuge (790 ha) in southwestern Washington during 1972-77. Quality of habitat was considered good for these deer and total population size remained between 164-230 as determined by mark-recapture methods during November. Population size declined significantly between the winters of...
Resource Type:: Dissertation
Full Text:: - dividual as "the area of the smallest sub-region which accounts for a specified proportion, p, of its

The heritability of resistance to gas bubble disease of Columbia River fall Chinook salmon, (Oncorhynchus tshawytscha)

Creator:: Cramer, Steven P.
Abstract:: A nested mating experiment in which 20 males were each mated to four different females was used to obtain an estimate of the heritability of resistance to death from gas bubble disease in Columbia River fall chinook salmon (Oncorhynchus tshawytscha). Heritability estimates ranged from 0. 037 to 0. 038. Bioassays...
Resource Type:: Masters Thesis
Full Text:: proportion p (proportion selected) on the abcissa, and a- = phenotypic standard deviation. Values were then

Productivity and nesting habitat of Great Basin Canada geese : Umatilla National Wildlife Refuge

Creator:: McCabe, Thomas R.
Abstract:: Great Basin Canada goose (Branta canadensis moffitti) productivity and nesting habitat utilization were studied on the Columbia River within the boundaries of the Umatilla National Wildlife Refuge during the springs of 1974 and 1975. Five islands, BL-1, BL-2, SD-1, SD-2, and Telegraph Island (TI), contained 88 percent of the nesting...
Resource Type:: Masters Thesis
Full Text:: shrubs had a highly significant (P<0.001, df = 181) negative correlation between percent canopy cover

Effects of habitat manipulations on California quail in western Oregon

Creator:: Oates, Russell M.
Abstract:: The effects of disking, food plantings, and wheat plantings on a population of California quail (Lophortyx californicus) were studied from fall 1976 to spring 1978 on the E.E. Wilson Wildlife Area, Oregon. Twelve 16.2-ha study sites were established: 3 study sites for each treatment and 3 control sites. Disked areas,...
Resource Type:: Masters Thesis
Full Text:: significantly more bare ground and a higher percentage (P

ScholarsArchive@OSU

The chronic toxicity of 2,3,7,8-tetra-chlorodibenzo-p-dioxin (TCDD) to five selected aquatic organisms

Analysis of a ³²P material balance method for measuring periphyton production in flowing water

A genetic study of the red-band trout (Salmo sp.)

Population characteristics and habitat utilization of bighorn sheep, Steens Mountain, Oregon

An analysis of avian communities on a dredged material island

Transferrin variation and population differentiation in black-tailed deer

Population ecology of the Columbian white-tailed deer

The heritability of resistance to gas bubble disease of Columbia River fall Chinook salmon, (Oncorhynchus tshawytscha)

Productivity and nesting habitat of Great Basin Canada geese : Umatilla National Wildlife Refuge

Effects of habitat manipulations on California quail in western Oregon

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