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Partitioning Of Space And Time By The Western Jumping Mouse, Zapus Princeps Utahensis Hall, John M. Deacon

Theses and Dissertations

Intraspecific competition is important in determining habitat utilization by members of a single species. Effective use of habitat may involve partitioning the available resources: space, time and food among individuals of different age, sex, and/or reproductive state. Numerous publications deal with interspecific competition (McCloskey and Fieldwick 1975, Cody 1973, Rosenzweig 1973, Stewart and Levin 1973, Gaby 1972, Brown 1971, Koshkina 1971, Sheppe 1967, Caldwell and Gentry 1965, Cameron 1964, Clough 1964, Gause 1932), but little has been written on intraspecific competition among populations of organisms in nature.

Isolation, Purification, Scanning Electron Microscopy And Bacterial Dna Uptake Of Plant Protoplasts, Bronwyn G. Hughes

Theses and Dissertations

Protoplasts were isolated from tobacco and barley leaves in sucrose or mannitol using commercially available cellulases and macerozymes. Barley growth and protoplast isolation and purification conditions were optimized so that protoplasts were obtained in high yields free of unwanted debris and organelles. A technique for processing barley and tobacco protoplasts for examination by scanning electron microscopy was developed in which protoplasts seem to have maintained their structural integrity. Barley and tobacco protoplasts took up 3H-B. subtilis DNA, 125I-B. subtilis DNA or 125I-M. luteus DNA as a linear function of time (0-6 hr) and DNA concentration (0-200 μg/ml). Up to 16 …

Historian As Entrepreneur: A Personal Essay, Leonard J. Arrington

BYU Studies

No abstract provided.

The Old Philosopher, Linda Sillitoe

BYU Studies

No abstract provided.

Unarmed Descent: The Achievement Of R. D. Laing, Terrell M. Butler

BYU Studies

No abstract provided.

The Mormon Village: Genesis And Antecedents Of The City Of Zion Plan, Richard H. Jackson

BYU Studies

No abstract provided.

Toward Manti, Kathryn R. Ashworth

BYU Studies

No abstract provided.

Cyrus E. Dallin: Let Justice Be Done Rell G. Francis, Robert S. Olpin

BYU Studies

No abstract provided.

Breeding Biology Of The Double-Crested Cormorant On Utah Lake, Ronald M. Mitchell

Great Basin Naturalist

Research on the nesting of the Double-crested Cormorant (Phalacrocorax auritus auritus) was undertaken to determine the breeding biology of the bird on Utah Lake, Utah County, and the possible effects that diking Provo Bay would have on the cormorants breeding there. In 1973, two colonies in Provo Bay were visited weekly to determine laying dates, incubation period, clutch size, and hatching dates. Another colony, located on the dike of the Geneva Steel Works Reservoir near Orem, was visited daily during the spring and summer of 1973. At this colony egg-laying occurred from 13 April to 17 May. The …

Cattail Decline At Farmington Bay Waterfowl Management Area, Christine Minton Anderson

Great Basin Naturalist

For the last seven years, 1969 to 1976, a steady decline of cattails (Typha latifolia L.) has been observed at Farmington Bay Waterfowl Management Area, Davis County, Utah. Several parameters of Farmington Bay's environment that could cause or enhance a decline of the marshland vegetation were studied. These parameters included temperature, pH, phenols, oil and grease, heavy metals, fungus pathogens, and salt water intrusion from the Great Salt Lake. Elevated soluble salt concentrations were found to be responsible for the decline. Cattails are weakened or killed when they are exposed to soluble salt concentrations greater than 5.0 gm/liter, and …

Hydrological Features Of A California Coastal Fen, Don C. Erman, Kenneth B. Roby, Michael Eames

Great Basin Naturalist

A unique fen peatland, on the Califomia coast, depends on six streams for its supply of flowing, mineral-rich water. About 25 percent of the water is supplied by surface streams that had average concentrations of Ca⁺⁺ from 0.15 meq/1 to 0.32 meq/1 and of Mg⁺⁺ from 0.25 meq/1 to 0.47 meq/1. During the dry summer period oxygen concentration and pH were lower in the central area than in the ten margins. Water flow near the margins maintains high O₂, pH, and cation content. The fen ranges from 4 m to over 11 m in depth, but …

Introduced And Exported American Scolytidae (Coleoptera), Stephen L. Wood

Great Basin Naturalist

Fourteen North, Central, and South American Scolytidae have reached areas outside of America, namely Hawaii (5), Australia (3), Southeast Asia (2), Africa (7), Europe (1), and worldwide (1). The 44 species introduced into North and Central America have originated in South America (10), Southeast Asia (15), Africa (14), or Europe (7). Four North and Central American species have extended their ranges into new territory within this region. Most of the species that breed in the bole or roots of their host were imported more than a half century ago; those imported since 1950 breed mostly in seeds, pods, dry fruits, …

The Sagebrush Vole Flea, Megabothris Clantoni Princei, In Western Utah, With Comments On The Distribution Of Megabothris In The Bonneville Basin, Harold J. Egoscue

Great Basin Naturalist

The sagebrush vole flea (Megabothris clantoni princei Hubbard) is reported from Utah for the first time, based on collections made in Tooele County. Distribution of the flea Megabothris abantis in the Bonneville Basin is limited to the Oquirrh Mountains, where its presence appears to be determined by the occurrence of the western jumping mouse.

A New Status For Penstemon Cyananthus Hook. Ssp. Subglaber Pennell (Scrophulariaceae), Stephen L. Clark

Great Basin Naturalist

Penstemon cyananthus Hook. ssp. subglaber Pennell, a plant found frequently in northwestern Utah, southeastern Idaho, and southeastern Wyoming, is elevated to species status. A new name, Penstemon holmgrenii Clark is proposed because P. subglaber is preoccupied.

End Matter, Vol. 37 No. 1

Great Basin Naturalist

No abstract provided.

Interpopulational Variation Of Blood Proteins In Pika (Ochotona Princeps Saxatilis), John T. Brunson, Richard N. Seaman, Donald J. Nash

Great Basin Naturalist

Studies were undertaken to examine the degree of divergence in four populations of pika in Colorado. Separation of blood proteins was accomplished utilizing acrylamide-gel disc electrophoresis. Separate analyses of variance were carried out for the relative mobilities of two of the transferrins (designated RMβ₁ and RMβ₂), the mean relative distance difference of the two transferrins (DM), and the density of the most prominent albumin (α₁) and transferrin (β₂) bands. Although the four populations were characterized by a general similarity of the gel patterns, both interpopulational and sexual variations were observed. …

Observations On The Distribution Of Microorganisms In Desert Soil, A. T. Vollmer, F. Au, S. A. Bamberg

Great Basin Naturalist

Population estimates of fungi, bacteria, and actinomycetes in desert soil were determined with respect to soil depth and distance from shrubs. In general the highest numbers of microbes were found at the shrub base; the lowest numbers were found in the interspaces. While the total number of organisms usually declined in deeper soil, the relative importance of the actinomycetes increased. These population trends are attributed to substrate availability and utilization and interspecific interactions.

As the soils became drier and warmer the total number of microorganisms decreased. Mold populations remained at about the same level during the study. While the numbers …

An Undescribed Species Of Thelypodiopsis (Brassicaceae) From The Uinta Basin, Utah, Stanley L. Welsh, N. Duane Atwood

Great Basin Naturalist

Thelypodiopsis argillacea Welsh and Atwood sp. nov. is described from specimens collected on the Green River Shale Formation in Uintah County, Utah.

Food Of Townsend Ground Squirrels On The Arid Land Ecology Reserve (Washington), Mark K. Johnson

Great Basin Naturalist

Diets of townsend ground squirrels were quantified from the Arid Land Ecology (ALE) Reserve eastern Washington.

Front Matter, Vol. 37 No. 1

Great Basin Naturalist

No abstract provided.

A Mountain Cercocarpus Population—Revisited, E. S. Nixon

Great Basin Naturalist

A mountain cercocarpus (Cercocarpus montanus Raf.) population was analyzed first in 1965 and again in 1975 to gain insight into the growth and reproduction of this species. The basis for comparison was plant height and number of basal stems. Growth (measured by height) was slow during the 10-year period, with plants on the northeast-facing slope having an average increase of 37 cm and those on the southwest-facing slope maintaining relatively the same average height. There was an overall decrease in average number of base stems for plants positioned on both slopes.

The Influence Of Predator Control On Two Adjacent Wintering Deer Herds, Dennis D. Austin, Philip J. Urness, Michael L. Wolfe

Great Basin Naturalist

Two mule deer herds were studied on comparable, adjacent winter ranges in Utah. Significant differences in overwinter fawn survival were attributed to intensive predator control.

Bionomics Of Two Aspen Bark Beetles, Trypophloeus Populi And Procryphalus Mucronatus (Coleoptera: Scolytidae), Jerold L. Petty

Great Basin Naturalist

Beetles of Trypophloeus populi attacked green bark of unhealthy aspen (Populus tremuloides) and hastened the death of the tree. Beetles of Procryphalus mucronatus favored dead bark and were of little significance in the death of the aspen. These two beetle species were distinguished from each other by their primary galleries, eggs, larvae, larval mines, and mating behavior. In T. populi, there were three larval instars and one to one and one-half generations per year; only larvae overwintered, and the eggs of the first generation were present by mid-July. In P. mucronatus, there were two larval instars and one …

Preliminary Mammal Survey Of Fossil Butte National Monument, Wyoming, Tim W. Clark

Great Basin Naturalist

The mammalian community of Fossil Butte National Monument, Wyoming, consisted of at least 45 species. Snap trap sampling of the smaller species combined with sight and sign observations of the larger species formed the basis of this preliminary survey in the summers of 1974 and 1975. Snap-trapping samples (2880 trap days) yielded 44 least chipmunks and 89 deer mice. The distribution of all species was characterized by plant community occupancy. Heavy domestic livestock use of the communities nearest water has resulted in severe alteration in community structure; this has probably affected the distribution and abundance of at least some of …

Home Range Of The Western Jumping Mouse, Zapus Princeps, In The Colorado Rocky Mountains, Nathaniel Stinson Jr.

Great Basin Naturalist

Western jumping mice, Zapus princeps, were live-trapped during the summer of 1975 in an aspen forest in the Front Range of the Colorado Rocky Mountains. Home range sizes were calculated using the exclusive boundary strip method, and it was discovered that males had larger home ranges (298–3315 m², x̄ = 1743 m²) than females (680–1275 m², x̄ = 1041 m²). Mean range length was 96.5 m for males and 78.5 m for females. Spatial relationships showed that females tended to be more territorial than males, based on the females' higher percentage of …

Full Issue, Vol. 37 No. 1

Great Basin Naturalist

No abstract provided.

Osteology And Myology Of The Head And Neck Regions Of Callisaurus, Cophosaurus, Holbrookia, And Uma (Reptilia: Iguanidae), Douglas C. Cox, Wilmer W. Tanner

Great Basin Naturalist

A detailed study of the anterior osteology and myology of Callisaurus, Cophosaurus, Holbrookia, and Uma reveals the phylogenetic relationships among the sand lizards. An SPSS discriminant analysis of osteological characters combined with myological characters indicates that Callisaurus is most primitive, Cophosaurus and Holbrookia are most closely related, and Uma is the most distinct of the sand lizard genera. Because of close relationships between Cophosaurus and Holbrookia, it is postulated that earlessness evolved once, and Cophosaurus is returned to synonymy under Holbrookia.

Plants Of Arizona: A New Species Of Astragalus From The Kaibab Plateau, Stanley L. Welsh, Kaye H. Thorne

Great Basin Naturalist

Astragalus atwoodii Welsh and Thorne is named and described on the basis of materials collected on the Kaibab Plateau in Coconino County, Arizona.

Cytosol Binding Of Steroid Hormones In Sheep Brains And Pituitaries, David Carl Marcusen

Theses and Dissertations

The uptake and binding of tritiated cortisol, corticosterone, and dexamethasone in cytosols isolated from various regions of non-adrenalectomized (intact) and adrenalectomized sheep brains and pituitaries were studied. [3H]-cortisol and [3H]-corticosterone were bound preferentially by cytosols from the hippocampal and septal regions of the brain, whereas, [3H]-dexamethasone was preferentially bound by cytosol from the pituitary. Cytosols isolated from the brains of adrenalectomized sheep bound significantly more [3H]-corticosterone than did cytosol from the brains of intact animals. Pre-incubation of cytosols from the hippocampus of adrenalectomized animals with non-radioactive testosterone or estradiol did not significantly block the subsequent binding of [3H]-cortisol. Results of …

Utilization Of Nest Boxes By Birds In Three Vegetational Communities With Special Reference To The American Kestrel (Falco Sparverius), Laurence Barrett Mcarthur

Theses and Dissertations

This study was designed to determine if, by providing artificial nest sites, a raptorial predator could be attracted into an area where suitable sites are limited. The American Kestrel (Falco sparverius) was a common species in the area and nest boxes designed for their use were placed in three vegetational types in western Utah and eastern Nevada. Seventy boxes were available in 1975 and 110 in 1976. Kestrels nested both years in the salt-desert shrub community but were absent from the pinyon-juniper and riparian areas. Four other bird species nested in the latter two areas, however. In 1975 the nesting …