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Habitat use and spatial interactions of cattle, wild horses, mule deer, and California bighorn sheep in the Owyhee breaks of southeast Oregon

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dc.contributor.advisor Vavra, Martin
dc.creator Ganskopp, David C.
dc.date.accessioned 2010-03-15T19:51:07Z
dc.date.available 2010-03-15T19:51:07Z
dc.date.issued 1983-09-19
dc.identifier.uri http://hdl.handle.net/1957/14982
dc.description Graduation date: 1984 en
dc.description.abstract The objectives of this study were to quantify and describe: (1) the major plant communities and their distribution, (2) the distribution and movement patterns of large herbivores relative to water, topography, and plant communities, (3) the daily activity patterns of each herbivore, and (4) the borne range size of wild horse bands and studs on a 376 km² area in southeast Oregon. Distribution of plant communities about the area was indicative of a history of overgrazing and fire. Communities in low ecologic condition were associated with relatively level terrain and basin areas. Wild horses and bighorn sheep were year-around study area residents. Cattle occupancy was from April through October, and intensive deer use occurred from October through April. Deer movement to and from the area was correlated with, but probably not caused by cattle activities. Deer, however, preferred cheatgrass communities previously grazed by livestock. Ellipse estimates of home ranges for bands and studs averaged 28.3 and 25.8 km², respectively. Polygon estates for band and stud home ranges averaged 11.8 and 12.3 km², respectively. Home ranges of bands and studs overlapped substantially, and no territorial behavior was observed. Home range size showed a significant, but weak, negative correlation with water hole density. With the exception of bighorn sheep, habitat use by large herbivores was negatively correlated with increasing slope. Species order for progressively greater use of slopes was cattle, horses, deer, and bighorn sheep. Of the 4 herbivores studied bighorn sheep were the most restricted in distribution. Progressive rankings of greater spatial distribution were: bighorn sheep, cattle, horses, and deer. Patterns of resource use by large herbivores did not always conform to mathmatical expectations. en
dc.language.iso en_US en
dc.relation Explorer Site::Oregon Explorer en
dc.subject.lcsh Herbivores -- Habitat -- Oregon -- Owyhee River Valley en
dc.title Habitat use and spatial interactions of cattle, wild horses, mule deer, and California bighorn sheep in the Owyhee breaks of southeast Oregon en
dc.type Thesis/Dissertation en
dc.degree.name Doctor of Philosophy (Ph. D.) in Rangeland Resources en
dc.degree.level Doctoral en
dc.degree.discipline Agricultural Sciences en
dc.degree.grantor Oregon State University en
dc.contributor.committeemember Krueger, W. C.
dc.contributor.committeemember Church, D. C.
dc.contributor.committeemember Meslow, E. C.
dc.contributor.committeemember Nelson, A. G.
dc.contributor.committeemember Haferkamp, M. R.
dc.contributor.committeemember Sneva, Forest
dc.description.digitization PDF derivative scanned at 300 ppi (256 B&W), using Capture Perfect 3.0.82, on a Canon DR-9080C. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR. For map, master file scanned at 600 dpi (8-bit grayscale) using SlmartLF 1.3.05 on a Paradigm ImagePRO GxT 42 HD (OEM version of ColortracSmartLF Bx 42). Image manipulated by SmartLF1.3.05. en

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