Life Sciences Commons^™

Cytological Evidence For Reciprocal Introgression In Agropyron Trachycaulum And Agropyron Spicatum, Laval M. Pitts

Theses and Dissertations

Agropyron trachycaulum (Link) Malte and Agropyron spicatum Pursh, both native range grasses of the Great Basin, often hybridize in nature. A. trachycaulum, is a tetraploid with 28 chromosomes. It has awnless or awntipped lemmas and small anthers. A. spicatum is a diplois with 14 chromosomes. It is characterized by having long awn that bend at maturity, and anthers which are about four times longer than A. trachycaulum. Artificial hybrids are intermediate between parents in awn and anther lengths and have 21 chromosomes. A natural population in Utah was found consisting of A. trachycaulum, A. spicatum, plants resembling the artificial hybrids, …

End Matter, Vol. 3 No. 1

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

Birds Of The Nevada Test Site, C. Lynn Hayward, Merlin L. Killpack, Gerald L. Richards

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

Front Matter, Vol. 3 No. 1

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

Parasitic Mites Of Kangaroo Rats Of The Nevada Atomic Test Site, Morris A. Goates

Theses and Dissertations

A systematic study of parasitic mites on kangaroo rats at the Nevada Test Site, Nye County, Nevada, was conducted from August, 1959, to December, 1961. The intent was to determine their kinds, numbers, seasonal occurrence, and ecological relationship with Dipodomys merriami merriami Mearns and Dipodomys microps occidentalis Hall and Dale in nuclear disturbed and contiguous undisturbed areas. Study areas were established in three major valleys -- Jackass Flats, Yucca Flat, and F renchman Flat.

Front Matter, Vol. 2 No. 4

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

End Matter, Vol. 2 No. 4

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

Nevada Test Site Study Areas And Specimen Depositories, Dorald M. Allred, D Elden Beck, Clive D. Jorgensen

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

A Study Of The Coprophilous Ascomycetes Of Utah, David L. Hanks

Theses and Dissertations

Specimens of animal dung were collected from various areas of the state of Utah. These were cultured by placing a few small pieces in a culture dish over moistened sphagnum moss and filter paper. The cultures were observed periodically and specimens were studied as they matured upon the substratum. A total of eighty-four species representing three orders and fifteen genera are reported. Of these, nine species have not previously been described. Included is one species, Tripterospora erostrata, from the order Plectascales of the Series Plectomyceteae. Cited from the order Sphaeriales of the Series Pyrenomyceteae are forty-nine species as follow: Coniochaeta, …

Front Matter, Vol. 2 No. 3, Part 1

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

End Matter, Vol. 2 No. 3, Part 1

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

Hard-Bodied Ticks Of The Western United States. Part I, Elias P. Brinton, D Elden Beck

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

Biotic Communities Of The Nevada Test Site, Dorald M. Allred, D Elden Beck, Clive D. Jorgensen

Brigham Young University Science Bulletin, Biological Series

This paper consitutes a terminal report to the United States Atomic Energy Commission for Contract AT(11-1)786. It provides a listing of the fauna known to occur at the Nevada Test Site, with designation of ecological distribution and relative density. It is designed to serve as the basic faunistic reference source, in subsequent studies, related to geographical and ecological features at the test site.

End Matter, Vol. 2 No. 2

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

Front Matter, Vol. 2 No. 2

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

Vegetational Changes Of The Uinta Basin Since Settlement, Bernard Curtis Dastrup

Theses and Dissertations

A general survey of the vegetational changes of the rangelands of the Uinta Basin was made using historical records, documents, interviews, and recent vegetational surveys. Historical vegetatienal information about the Uinta Basin is very limited, most of it pertaining to the vegetation along the streams and rivers. Escalante, in 1776, mentioned the splendid groves of cottonwoods, the fine pastures, and the abundance of game along the rivers. Ashley in 1825 and Powell in 1870 entered the Basin via the Green River. Ashley crossed the Basin following the Duchesne River and its tributary the Strawberry River. He described the groves of …

Differential Salt Tolerance Of Hordeum Jubatum, Agropyron Trachycaulum, And Their Natural Hybrid Elymus Macounii, Marian Lucy Hanna

Theses and Dissertations

Because plants show a wide range of variation in growth in the presence of excessive concentrations of soluble salts in the soil, this study was undertaken to determine the effects of various concentrations of NaCL and Na2SO4 on the growth and development of Hordeum jubatum, Agropyron trachycaulum, and the natural hybrid of these two plants, Elymus macounii.

The Taxonomic Problem Of Polycelis In The United States, Lee F. Braithwaite

Theses and Dissertations

During the spring of 1941, Dr. C.L. Hayward, of the Brigham Young University zoology department, while on a field trip with his ecology class found some interesting planaria.ns at a place called Stewart's Flats on Mt. Timpanogos, Utah County, Utah. A fellow teacher, Dr. D. E. Beck, sent live specimens to Dr. L. H. Hyman of the American Museum of Natural History for identification. Although the specimens arrived in New York as a "putrid smelling soup,"1 the specimens, through correspondence, were thought to be Polycelis coronata (Girard), the same species Hyman collected in South Dakota during August 1929.

Vertebrate Distribution In Relation To Certain Habitats In Central Kane County, Utah, Clyde L. Pritchett

Theses and Dissertations

This thesis is a study of vertebrate distribution in relation to certain habitats in cetral Kane County, Utah. Four areas were trapped, two in a sagebrush community and two in a grassland community. Oryzopsis hymenoides (Roem & Shult.) Ricker, Hilaria jamesii (Torr) Benth., Ephedra torreyana S. Watts and Guttierrezia sarothrae (Purah.) Britt and Rusby, were the dominant plants in the grassland community. The dominant plants in the sagebrush community were Artemisia tridentata Nutt., and Hilaria jamesii (Torr.) Benth. Dipodomys ordii cupidineus Goldman was the most common mammal trapped in both communities. Peromyscus maniculatus sonoriensis (LeConte) was trapped most often in …

End Matter, Vol. 2 No. 1

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

A Comparative Study Of The Species Of The Genus Crotaphytus Holbrook (Iquanidae), Wilbur Gerald Robison Jr., Wilmer W. Tanner

Brigham Young University Science Bulletin, Biological Series

The anterior musculature of C. wislizeni and C. collaris is described in detail and compared. Size and number relationships of the skull and its component bones, the sternum, the clavicle, the parts of the hyoid, the general body form, certain scales and teeth, and the eggs per clutch were determined for large samples of both species and then statistically compared. The general character of many structures is also compared and notes are made on C. reticulatus.

The differences encountered by this study, as well as the valid ones of those listed by Smith (1946:158–159) are not considered to be important …

Front Matter, Vol. 2 No. 1

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

Perennial Atriplex Of Utah And The Northern Deserts, Craig A. Hanson

Theses and Dissertations

Atriplex is a genus in the Chenopodiaceae, the perennial members of which are ecologically important in western North America. Seventeen species and one subspecies of perennial Atriplex occur in Utah and the northern deserts. Three of these species and the subspecies were described by the writer in a recent publication as a result of extensive field work leading to this study. These are A. welshii, A. navajoensis, A. bonnevillensis, and A. cuneata ssp. introgressa. This study is an investigation of the systematics and phytogeography of the perennial Atriplex in Utah and the northern deserts, with emphasis on the A. gardneri …

A Check-List Of The Species Of Eleodes And Descriptions Of New Species (Coleoptera-Tenebrionidae), Vasco M. Tanner

Great Basin Naturalist

No abstract provided.

An Analysis Of A Hybrid Complex Involving Agropyron Subsecundum, Agropyron Trachycaulum And Elymus Glaucus, Lewis Kay Shumway

Theses and Dissertations

In the past twenty years many workers have made contributions to a better understanding of hybridization and introgression through studies of members of the grass family. The present study is an attempt to increase the understanding of the importance and amount of hybridization and introgression in members of the Tribe Hordeae. This study is concerned with a hybrid complex involving Agropyron subsecundum (Link) Hitchc. (bearded wheatgrass), Agropyron trachycaulum (Link) Malte (slender wheatgrass) and Elymus glaucus Buckl. (blue wild rye).

An Ecological Study Of An Exclosure In The Mountain Brush Vegetation Of The Wasatch Mountains, Utah, Elray S. Nixon

Theses and Dissertations

This is a comparative study of the vegetation and soils of an exclosure in the mountain brush vegetation of the Wasatch Mountains, Utah. The exclosure was fenced and initially analyzed during the summers of 1949-1950. The study area is located in Pole Canyon in the Uinta National Forest, a few miles northeast of Provo, Utah. The dominant woody species of the vegetation in the exclosure are big toothed maple (Acer grandidentatum) and Gambel oak (Quercus gambelii). After settlement of the area in and around Provo, Pole Canyon became overgrazed by livestock. Since 1949 the area has been protected from grazing. …

A Morphological Study Of Some Larval Ticks Of The Genus Dermacentor With Emphasis On Structures Of Possible Taxonomic Importance, Richard Grant Robertson

Theses and Dissertations

This study was undertaken to evaluate and determine morphological characteristics which might prove valuable in the identification of the larvae of the following species of ticks of the genus Dermacentor Koch: D. albipictus Packard, D. andersoni Stiles, D. hunteri Bishop, D. parumapertus Neuman, and D. variabilis Say. A taxonomic key for the identification of all of the Canadian and United States species of the larvae of the genus Dermacentor Koch cannot be constructed until specimens of D. halli and D. occidentalis have been examined. However, the followng conclusions were reached regarding the species studied: 1. Position of setae is of …

Bark Beetles Of The Genus Dryocoetes (Coleoptera: Scolytidae) In North America, Donald Edward Bright Jr.

Theses and Dissertations

The genus Dryocoetes is widely distributed in Europe, Asia, North America and Central America. It consists of about sixty species, seven of which occur in North America.

Classification And Distribution Of The Native Trees Of Utah, Kimball Steward Erdmann

Theses and Dissertations

This study is an attempt to consolidate the information already known about the trees of Utah and to extend our knowledge of these trees. An intensive study was made of the available literature. The tree specimens of the herbaria of the Utah State University, University of Utah, Brigham Young University and the Regional Office of the Forest Service at Ogden were examined. These studies were supplemented with extensive field work in various parts of the state. From this information, keys and descriptions of the genera and species were written and distribution maps for each tree and illustrations of many of …

A Comparative Study Of The Axillary Sclerites In Coleoptera, Howard P. Shurtleff

Theses and Dissertations

The axillary sclerites of 69 species representing 52 families of the order Coleoptera were examined and illustrations prepared of most or them. A description is given for the typical axillary sclerites and the deviations in form from this pattern are discussed for the major groups of beetles. The phylogenetic relationships between some families, and other groups, are pointed out based on the morphology of the axillary sclerites. Phyletic groups in Adephaga are characterized by the axillary sclerites, but in the Polyphaga variations are too numerous and inconsistant to be useful in determining phyletic trends.