Life Sciences Commons^™

Front Matter, Vol. 4 No. 4

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

Distribution Patterns Of Pocket Gophers In The Hobble Creek Area, Utah County, Elvis J. Holt

Theses and Dissertations

This study was initiated to investigate the distribution patterns of two species of pocket gophers, Thomomys umbrinus albicaudatus Hall and T. talpoides wasatchensis Durrant whose ranges come together in the Hobble Creek area, Utah. The effect of certain ecological factors upon their distribution was determined. The ecological factors included: vegetation and land use, soil, moisture and exposure, hybridization and interspecific competition. From morphological examination no interbreeding was detected even though the breeding seasons of the two species correspond. A limited area was found where the ranges of the two species are in contact. A lack of available moisture was determined …

Autoradiographic Localization Of Serotonin And 5-Hydroxytryptophan In The Rat Brain, Gordon Keith Matheson

Theses and Dissertations

Serotonin is a normal constituent of the brain and has been claimed to act as a neurohormonal or regulatory agent in nerve transmission. Previous workers have only studied its whole brain or subcellular particulate distribution. Because the brain itself is divided into many distinct ganglia and nuclei, the distribution of serotonin in these sites is considered to be of greater importance than either the whole brain or subcellular distribution. This paper is a study of the distribution of serotonin in particular brain sites in rats with normal and elevated levels of the amine, with and without electroshock treatment. The results …

A Study Of Growth Rates In Seedlings Of Douglas Fir Ecotypes, Herbert D. Papenfuss

Theses and Dissertations

The purpose of this study was to find out if ecological races with different growth rates existed in douglas fir. Seeds were collected from six areas by the Forest Service and the author. A study was made of stem and tap root growth utilizing three photoperiods of varying length. Rate of tap root growth was significant for ecotype suggesting selection for tap root length in the plants from utah and Arizona. Each geographical area represents a growth rate ecotype with a wide break in the data on stem growth.

A Comparative Osteological Study Of Two Species Of Colubridae (Pituophis And Thamnophis), Robert E. Bullock

Theses and Dissertations

With reference to anatomical studies it appears that the aerpents are indeed a neglected group ot reptiles. Although some early writers recorded a few fragmentary obser-vations on the anatomy of snakes, no attempt was made to undertake a complete comprehensive study. Cole (1944) has rightfully referred to this section of vertebrate anatomy as "almost virgin field." The serpent area of reptilian anatomy is deserving ot a more intensive investigation because of the considerable number ot adaptations demonatrated by this group of reptiles in relation to their peculiar types ot locomotion and methods ot feeding. It is important to understand the …

A Taxonomic Study Of Fleas Of The Genus Foxella (Wagner) In Utah (Siphonaptera: Dolichopsyllidae), Robert A. Amoureux

Theses and Dissertations

Fleas of the genus Foxella Wagner, commonly known as "gopher fleas," have various species of the mammal genus Thomomys Weid Neuweid in the Western United States as their hosts. Some workers maintain there are at least two species of fleas while others consider that all gopher fleas are of one species.

Front Matter, Vol. 4 No. 2

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

End Matter, Vol. 4 No. 2

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

Annotated Checklist Of The Plants Of Mesa Verde, Colorado, Stanley L. Welsh, James A. Erdman

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

Changes In The Vegetation Of Two Restricted Areas Of The Wasatch Plateau As Related To Reduced Grazing And Complete Protection, Hyrum B. Johnson

Theses and Dissertations

An understanding of the interactions betnen vegetation and livestock grazing is of paramount importance to the welfare of the livestock industry. It is also important to know how these interactions affect the balance of the ecosystem. In general, observations of changes in vegetation provide an index for evaluating such interactions. Vegetation change is the main object of consideration in this paper. The study is concerned with some of the oldest pemanent native vegetation study plots in the Western United States. They are located on Horseshoe Flats of the Wasatch Plateau in Central Utah.

Mites On Kangaroo Rats At The Nevada Test Site, Morris A. Goates

Brigham Young University Science Bulletin, Biological Series

A systematic study of parasitic mites on kangaroo rats of two species at the Nevada Test Site was conducted from August 1959 to December 1961. The intent was to determine the kinds, numbers, seasonal occurrences and ecological relationships of mites in nuclear disturbed and contiguous undisturbed areas. A total of 1,256 rats from nine plant communities was examined.

The 6,208 mites collected represented 16 species including four undescribed. Fourteen were found on both kinds of rats. Considerably more rats were infested with chiggers than with mesostigmatids. Each species of mite occurred alone on its host at least 20% of the …

Front Matter, Vol. 3 No. 4

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

Front Matter, Vol. 3 No. 3

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

Reptiles Of The Nevada Test Site, Wilmer W. Tanner, Clive D. Jorgensen

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

End Matter, Vol. 3 No. 4

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

Ticks Of The Nevada Test Site, D Elden Beck, Dorald M. Allred, Elias P. Brinton

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

End Matter, Vol. 4 No. 1

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

End Matter, Vol. 3 No. 3

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

Front Matter, Vol. 4 No. 1

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

Front Matter, Vol. 3 No. 2

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

Solpugida Of The Nevada Test Site, Martin Hammond Muma

Brigham Young University Science Bulletin, Biological Series

Study of nearly 1,000 specimens of solpugids collected in 1960, 1961, and 1962 from Mercury, Nevada, resulted in the identification and placement of 395 adults in 28 species. Eight new species are described and figured. Two new synonymies, resulting from proper association of males and females, are cited. Study of the seasonal distribution and relative abundance of the sexes of 12 common species has prompted general and specific deductions concerning the essentially unknown biology of North American solpugids. Systematic collection data furnished ecological information concerning the 12 common species.

Front Matter, Vol. 2 No. 3, Parts 2 & 3

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

Hard-Bodied Ticks Of The Western United States. Parts Ii And Iii, Elias P. Brinton, D Elden Beck

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

End Matter, Vol. 3 No. 2

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

End Matter, Vol. 2 No. 3, Parts 2 & 3

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

Ecology Of Summer Aquatic Invertebrate Populations In A Marsh Area Of Utah Lake, David A. White

Theses and Dissertations

Mud Lake marsh lies east of Utah Lake between the cities of Provo and Springville in Utah County. Since 1936 it has become a polluted, odiferous, silted area. A study was conducted on the aquatic invertebrates during the summer of 1962 (June 19 to September 20). An .01 meter2 bottom sampler was used at 30 random stations. Each station was sampled once a week. Water depth, mud, water and air temperatures were taken at each station. Dissolved oxygen (Winkler method) and ion resistance (Wheatstone bridge) were taken each day. The aquatic invertebrate community consisted of benthic (Diptera, Oligochaeta, Nematoda), interphashic …

The Darkling Beetles Of The Nevada Test Site (Coleoptera - Tenebrionidae), Willis A. Packham

Theses and Dissertations

In the desert areas of southwestern United States the Coleoptera, family Tenebrionidae, constitute a conspicuous part of the ground-dwelling insects. Most species are black or dull chestnut-brown. They are primarily nocturnal and during the day can be found under rocks, debris, loose bark, or in rodent burrows. On cloudy days they may be seen lumbering along the desert floor. Most tenebrionids feed on plant materials of various sorts. In August, 1959, Brigham Young University initiated an ecological study at the Nevada Test Site near Mercury in Nye County, Nevada. As part of that study, emphasis was given to the ground-dwelling …

A Comparative Study Of The Osteology And Myology Of The Hind Limb Of The Pocket Gopher And Kangaroo Rat, Nancy S. Price

Theses and Dissertations

The purpose of this study was to compare the morphology of the hind limb of the pocket gopher with that of the kangaroo rat and to determine their differences. This was accomplished by first, obtaining the specimens; second, preparation of the specimens for preservation and dissection; third, photographing and tracing the muscles; fourth, noting the origin and insertion of each muscle and their general morphology; and fifth, preparation and photographing of the bones. Comparative volumetric measurements were made of the muscles of the two animals to determine the differences between them. These two families, Geomyidae and Heteromyidae, are closely related …

A Study Of The Morphology And Systematics Of The Genera Polydrusus And Scythropus (Coleoptera: Curculionidae), Gary L. Jensen

Theses and Dissertations

The objectives of this study were 1) to further clarify the status of the genera Polydrusus and Scythropus and 2) to redescribe and elucidate the morphology and distribution of the species of Scythropus in order to better facilitate their identification. Some 1650 specimens were used in the study and about 300 of these were critically examined for morphological variations of the head, beak, antennae, thorax, elytra, abdomen, integument, legs, genitalia, and eighth tergite and ninth segment of the male. Over one hundred genitalia were dissected and critically examined for good characters. The male genitalia were the most reliable single characters …

Seasonal Study Of Mites On Deer Mice (Peromyscus Maniculatus) In A Chaparral Community, Donald B. Ash

Theses and Dissertations

The parasitic mites on mammals living in the chaparral community of Utah are practically unknown ecologically. Keegan (1953) was the first to publish on parasitic mites from Utah. He listed mites of 12 species and 9 genera from Tooele and Juab counties from hosts which included one Peromyscus truei, five P. crinitus, and 20 P. maniculatus. Brennan and Beck (1955) published on the chiggers of Utah and included a key to 38 species. Allred (1954, 1956, 1957, 1958) studied the geographical distribution, seasonal occurrence, and biology of mites found on mice of the genus Peromyscus in Utah.