Index Catalog // ScholarsArchive@OSU

Distribution, density, and productivity of three species of accipiter hawks in Oregon

Creator:: Reynolds, Richard T.
Abstract:: Distribution of nests and nesting success were determined for sharp-shinned hawks (Accipiter striatus) Cooper’s hawks (A. cooperii), and goshawks (A. gentilis) in Oregon during 1969 through 1974. 1n addition, two areas (11,74l hectares in Eastern Oregon and 9,284 hectares in Western Oregon) were searched intensively for nests to determine nesting...
Resource Type:: Masters Thesis

The effects of copper on predator-prey interactions of fathead minnows (Pimephales promelas) and Daphnia pulex

Creator:: Rohm, Christina M.
Abstract:: Total copper concentrations of 10 [mu]g/l to 100 [mu]g/l appeared to alter the predator-prey interactions of fathead minnows (Pimephales promelas) and Daphnia pulex. The effect of copper concentration on the total amounts of D. pulex consumed over a 12-h period varied with the density of prey stocked hourly in the...
Resource Type:: Masters Thesis

The effects of dietary algal and lipid supplements on the gonadal and larval development of Crassostrea gigas kumamoto (Thunberg)

Creator:: Robinson, Anja M.
Abstract:: Under laboratory conditions, elevated temperatures accelerated production of gametes. However, when conditioning for spawning at elevated temperatures was initiated early in the season (January-March), larval survival and number of spat collected were significantly lower than when conditioning was initiated in may or June. At elevated temperatures, broodstock oysters were fed...
Resource Type:: Dissertation

Distribution and life history of the spiny dogfish (Squalus acanthias) off the Oregon and Washington coasts

Creator:: Richards, Jaclyn M.
Abstract:: This study examines the spatial and temporal distribution and life history of the "offshore" component of the Northeastern Pacific spiny dogfish (Squalus acanthias) population. Distribution was examined in relation to latitude, depth, the Columbia River plume and large-scale climate changes. Fishery and survey data indicate that the Northeastern Pacific spiny...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Jaclyn M. Richards for the degree

Habitat characteristics associated with abundance of band-tailed pigeons and use of mineral sites in the Pacific Northwest

Creator:: Overton, Cory T.
Abstract:: Index counts for the Pacific Coast race of the band-tailed pigeon (Columba fasciata monilis) have declined by -2% per year since survey efforts began in the 1950's and 60's. Mineral sites, important resources with high ion concentrations, are regularly visited by band-tailed pigeons which nest in surrounding forest lands. I...
Resource Type:: Masters Thesis
Full Text:: Science thesis of Cory T. Overton presented on September 4, 2003. APPROVED: M Head of Department of

Relationship between plant and butterfly community composition on upland prairies of the Willamette Valley, Oregon

Creator:: York, Melissa M.
Abstract:: Small remnants of 'natural' habitats exist today throughout much of the world. Upland prairies in the Willamette Valley, Oregon have been nearly eliminated by conversion to agriculture and other uses. As a result, very few prairies remain and at least four butterfly species that require this habitat appear to be...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Melissa M. York for the degree of

Vegetation response to prescribed fire in mountain big sagebrush ecosystems at Lava Beds National Monument, California

Creator:: Ellsworth, Lisa M.
Abstract:: Anthropogenic land use alterations such as livestock grazing and fire suppression have greatly altered sagebrush grasslands of the Great Basin, facilitating invasion of exotic annuals, increases in woody species, and losses of native species. Much of the current research surrounding wildland and prescribed fire in sagebrush dominated ecosystems has focused...
Resource Type:: Masters Thesis
Full Text:: . Boone Kauffman Richard F. Miller

Ecology of Columbian black-tailed deer fawns in western Oregon

Creator:: Pamplin, Nathan P.
Abstract:: Little is known about Columbian black-tailed deer (Odocoileus hemionus columbianus) because of their elusive nature and the logistical difficulty of studying them in densely forested and mountainous terrain. The Oregon Department of Fish and Wildlife has identified fawn survival as an important gap in the current knowledge of demography and...
Resource Type:: Masters Thesis
Full Text:: the most variation included the amount of edge and the average slope within 1,000 m of the birth site

White-breasted nuthatch density and nesting ecology in oak woodlands of the Willamette Valley, Oregon

Creator:: Viste-Sparkman, Karen
Abstract:: Habitat loss causes a reduction in available resources for wildlife, alters the configuration of remaining habitat, and may isolate wildlife populations. White-breasted nuthatches (Sitta carolinensis) are experiencing long-term population declines in the Willamette Valley of Oregon, where they are historically associated with oak woodlands. As secondary cavity-nesters, white-breasted nuthatches may...
Resource Type:: Masters Thesis
Full Text:: . Abstract approved: __________________________________________________________________ Richard A

Rearing conditions and their effects on growth, food conversion, and survival of English sole (Parophrys vetulus Girard)

Creator:: Williams, Steven Frank
Abstract:: This study consisted of determining some of the conditions for culture of young English sole (Parophrys vetulus Girard) in the laboratory. Rearing of the larvae to the juvenile stage was attempted unsuccessfully; techniques used and problems encountered during culture are discussed. Growth of juveniles was studied at combinations of temperatures...
Resource Type:: Dissertation
Full Text:: Richard S. Caldwell This study consisted of determining some of the conditions for culture of young

ScholarsArchive@OSU

Distribution, density, and productivity of three species of accipiter hawks in Oregon

The effects of copper on predator-prey interactions of fathead minnows (Pimephales promelas) and Daphnia pulex

The effects of dietary algal and lipid supplements on the gonadal and larval development of Crassostrea gigas kumamoto (Thunberg)

Distribution and life history of the spiny dogfish (Squalus acanthias) off the Oregon and Washington coasts

Habitat characteristics associated with abundance of band-tailed pigeons and use of mineral sites in the Pacific Northwest

Relationship between plant and butterfly community composition on upland prairies of the Willamette Valley, Oregon

Vegetation response to prescribed fire in mountain big sagebrush ecosystems at Lava Beds National Monument, California

Ecology of Columbian black-tailed deer fawns in western Oregon

White-breasted nuthatch density and nesting ecology in oak woodlands of the Willamette Valley, Oregon

Rearing conditions and their effects on growth, food conversion, and survival of English sole (Parophrys vetulus Girard)

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