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Food Habits Of The Uinta Ground Squirrel (Citellus Armatus Kennicott) On Some Meadows Of Mt. Timpanogos, Utah, Robert K. Shaw
Food Habits Of The Uinta Ground Squirrel (Citellus Armatus Kennicott) On Some Meadows Of Mt. Timpanogos, Utah, Robert K. Shaw
Theses and Dissertations
Food habits of the Uinta ground squirrel were investigated on some open meadows on the south-east slope of Mt. Timpanogos. Special emphasis was placed on species of plants eaten; and preference of plants in relation to season, succulence, and phenology. Other investigations were made in reference to: parts of plants eaten, non-plant material eaten, daily and seasonal activities in relation to foraging, feeding procedures, and the relationship between plant cover and Uinta ground squirrel activity.
Genetic Variation In Bluebunch Wheatgrass, Max P. Dunford
Genetic Variation In Bluebunch Wheatgrass, Max P. Dunford
Theses and Dissertations
Agropyron spicatum (Pursh) Scribn, and Smith, an important forage grass distributed primarily throughout western United States and northward into Canada, exhibits considerable ecological, cytological, and genetic variation. Twenty-five populations of 100 plants each were scored to obtain data on morphological and ecological variation. Statistical analysis of the data from fourteen of the populations showed that correlations between awn divergence and length, rhizomes with number of culms, adn diameter with number of culms were inconsistent or not significant. However, the correltion between rhizomes and diameter was significant in all populations.
Bird Populations Of The Wasatch Foothills, Delwyn G. Berett
Bird Populations Of The Wasatch Foothills, Delwyn G. Berett
Theses and Dissertations
One of the more interesting and unique of the natural habitats in the state of Utah is its chaparral zone, extending along the western foothills of the Wasatch Range. The purpose of this study has been to make an analysis of the bird population of this region in order to determine the comparative abundance of the species, their seasonal distribution within the area, and their ecological preferences.
The Comparative Mineral Requirements Of Pioneer And Climax Range Grasses, Paul L. Steele
The Comparative Mineral Requirements Of Pioneer And Climax Range Grasses, Paul L. Steele
Theses and Dissertations
A study was made to determine the effects of variable levels of nitrogen, phosphorus, and potassium upon several species of pioneer and climax range grasses, and to determine if these grasses differ in their ability to grow when supplied with low levels of these nutrients. Five grasses were used. The climax grasses were Agropyron spicatum and Agropryon smithii, and the pioneer grasses were Aristida longiseta, Sporobous cryptandrus, and Oryzopsis hymenoides.
A Morphological Study Of The Subtribe Ithypori (Coleoptera: Curculionidae), Leslie J. Boothe
A Morphological Study Of The Subtribe Ithypori (Coleoptera: Curculionidae), Leslie J. Boothe
Theses and Dissertations
This is a morphological study of the subtrib!a Itb:ypori, undertaken to discover all that we can about the morphology and if possible justify the present classification. It includes four genera and fifteen identified species.
The External Morphology Of Pseudopanurgus Aethiops (Cresson), Glenn A. Hackwell
The External Morphology Of Pseudopanurgus Aethiops (Cresson), Glenn A. Hackwell
Theses and Dissertations
In comparing the head of Pseudopanurgus with Anthophora and Apis, the general outline appears rather similar, the most significant variation being found on the posterior surface. Extending ventrally from the postoccipital suture to the dorsal wall of the proboscidial fossa is a suture known as the fused hypostomal suture. The hypostomal area is rather small and makes up only a small portion of the dorsal and lateral walls of the proboscidial fossa, the remainder being formed by the postgena. If this is correct, the hypostomal carinae (a term with which the author does not agree) are actually located on the …
A Study Of Physoderma On Three Species Of Portulacaceae, David L. Mumford
A Study Of Physoderma On Three Species Of Portulacaceae, David L. Mumford
Theses and Dissertations
Three species of the Portulacaceae each infected by a Physoderma parasite were collected at several locations in Utah. The hosts have been identified as Claytonia lanceolata Pursh., Oreobroma pygmaeum (A. Gray) Howell, and Erocallis triphylla (S. Wats.) Rydb. Since our present knowledge of Physoderma on members of the Portulacaceae is meager, it seemed desirable to learn as much as possible about the parasite, its hosts, and the relationship between parasite and host. Plants of all three hosts activated from perennating organs were grown for extended periods of time under uniform conditions. Cold treatments were most successful in activating host perennating …
A Study Of Three Photochemical Activities Of Chloroplasts, Jimmy W. Hinkson
A Study Of Three Photochemical Activities Of Chloroplasts, Jimmy W. Hinkson
Theses and Dissertations
Chloroplasts of sugar beet leaves were subjected to treatment by heating, by incubation at pH 8.5 and pH 5.5, by incubation in ion low water, by sonic oscillation, by digestion with enzymes (lysozyme, pancreatin, and lipase), by extraction with digitonin, and by chemical compounds including 8-hydroxy-quinoline, sodium azide, zinc sulfate, phenyl mercuric acetate, potassium cyanide, 1-allylthiourea, 2,4-dinitrophenol, thymol, and p-chloromercuribenzoate. A comparative study was made of the effects of these treatments upon three photochemical reactions (the photoreduction of 2,6- dichlorophenol indophenol, the photoreduction of indigo carmine in the presence of a couple composed of 2,6-dichlorophenol indophenol and ascorbic acid, and …
The Cattle Industry Of San Juan County, Utah, 1875-1900, Franklin D. Day
The Cattle Industry Of San Juan County, Utah, 1875-1900, Franklin D. Day
Theses and Dissertations
The purpose of this study was to learn the reasons for the movement of cattle Into San Juan County, Utah, the development of the Industry, and its contribution to the growth of the county.
The few written accounts in existence of the cattle industry in San Juan are brief and found in widely separate areas. The whole and complete account will likely never be written, but there is need for gathering as much of the scattered information as possible.
A study of the early history of the inhabitants of San Juan was made, along with an examination of the geography …