Animal Sciences Commons^™

Study Of The Aspectional Variations Of Siphonaptera Associated With The Nests Of The Thomas Wood Rat Neotoma Lepida Lepida Thomas, J. Franklin Howell

Theses and Dissertations

Much work has been done concerning those parasites found upon the host. Very little has been done concerning those parasites that are parasitic but are very rarely found upon the host. Therefore, the purpose of this study is to determine seasonal distribution of those fleas found in the nests of the desert wood rat (N. l. lepida). This paper shows that there is a seasonal variation of flea populations within a certain geographic area. It also shows that certain species of fleas are distributed seasonally; not all species being present in the same season. Three of the eleven species collected …

A Critical Study Of The Genus Pantosteus (Catostomidae), Keith M. Standing

Theses and Dissertations

The purpose of this paper is to critically study and analyze all species belonging to the genus Pantosteus and to determine tbe validity of the characteristics that were used to separate the genus Notolepidomyzon from the genus Pantoateus. Special reference was made to the morphology of the fontanelle and the weberian ossicles. In order to more thoroughly comprehend the reasons for Cope describing Pantosteus as a new genus and Fowler describing Notolepidomyzon as a new sub-genus and then Snyder elevating it to the status of a genus as complete a historical sketch as possible was made using all literature known …

The Skeletal Anatomy Of Several Species Of Salamanders With Special Reference To Bolitoglossa Rufescens (Cope), Afton M. Hansen

Theses and Dissertations

This paper deals with the complete skeletal anatomy ot Bolitoglossa rufescena (Cope). All parts are figured and described. In addition to this many of the main skeletal parts of Bolitoglossa platydactyla (Cuvier) Bolitoglossa occidentalis Taylor, and Bolitoglossa flaviventris (Schmidt) are described and figured. A comparison of the following parts of the above mentioned salamanders is presented: skull, atlas, ninth trunk vertebra, sixth caudal vertebra, carpals, tarsals and digits. The similarities and differences are pointed out as they appeared to the author. The relationship and specialization ot these species is discussed rather briefly.

Taxonomic Survey Of The Eggs And Larvae Of Some Species Of Utah Amphibia, Don B. Skousen

Theses and Dissertations

How the eggs and larbae of the Utah amphibians differ from each other is the problem to be considered in this paper. Certain problems are yet to be answered. One problem is that the larvae of Rana pretiosa subsp. From utah fit the description of the Nevada form, Rana pretiosa luteiventris, as described by Thompson (1913) and not the description of Rana pretiosa pretiosa as set forth by Svihla (1935). Another problem is that the adults, tadpoles, and eggs of Rana pipiens brachycephala and Rana onca are strikingly similar. Rana fisheri of the Las Vegas Valley in nevada and Rana …

Some Studies On The Consortes Of The Norway Rat In Utah County, Utah, Roy J. Myklebust

Theses and Dissertations

This study of the Norway rat, Rattus norvegicus (Erxleben) and its consortes was undertaken in Utah County to determine : (1} the frequency of infection of Trichinella spiralis (Owen) Railliet, the causative organism of trichinosis in humans, (2) the populations of fleas, lice and mites on the rat, and (3) the occurence of other consortes. This study covered a period from January 1951 through June, 1951. Additional records were made available from studies being made by the Department of Zoology and Entomology, Brigham Young University on parasitic arthropods (listed as Project Ten). The species ot fleas, and those mites which …

A Taxonomic Study Of The Catostomidae Of Utah Lake With Notes On The Fish Population, Lyle Junior Lowder

Theses and Dissertations

During the period from October 1950 to March 1951 a study of the taxonomy of the Catostomidae of Utah Lake was undertaken. Throughout this study information was collected on the numbers of suckers taken by some of the fisherman. From the data gathered it appears that the three species of Catostomidae cringinally named from Utah Lake are still there. The external morphological features of these fish are not recognizable unless they are observed very carefully. The most outstanding external characteristics used to differentiate the species are the mouth, lips, papillae on the lips and the general shape of the head. …

Ecology Of Passerine Birds Wintering At Utah Lake, Joseph R. Murphy

Theses and Dissertations

During the period of October to April of the winter of 1950-51, an ecological study was undertaken of a population or passerine birds wintering in a segment of the Utah Lake Shore. Available winter weather data indicated that although such factors as precipitation, temperature, and wind may often be severe, they are not critical enough to prevent a fairly large population of passerine birds from spending the winter months in the study locale. Five fairly distinct plant communities can be recognized in the area. There is evidence which indicates that certain passerine bird species are especially dependent on a particular …

A Taxonomic And Distributional Study Of The Subspecies Of The Iguanid Lizard Uta Stansburiana In The Eastern Great Basin 1950-1951, Dale D. Parker

Theses and Dissertations

This study is concerned with a critical analysis of species and subspecies of Uta stansburiana as it occurs in the Eastern Great Basin. In this study Urosaurus ornatus wrighti is also briefly discussed since it was until recently considered a member of the genus Uta and since it extends in the area which has been dealt with in this thesis. This problem necessitated study of large series of lizards in order to work out subspeciation. The material from the Brigham Young University collection and the specimens collected by the author total 520. After recording dorsal scale counts, prefrontal scales, keelation …

The Staphylinoid And Dascilloid Aquatic Coleoptera Of The Nevada Area, Ira La Rivers

Great Basin Naturalist

No abstract provided.

Some Observations On The Embryology And The Weberian Apparatus Of Catostomus Ardens (Jordan And Gilbert), H. Ronald Frogley

Theses and Dissertations

The purpose of this study is to add to our knowledge of the embryology and osteology of the Weberian apparatus as found in the sucker, Catostamus ardens J. & G. ot Utah Lake. Observations were made on the embryological development for twenty one days. This information has been discussed and pictures showing the development included. The literature on the osteology ot the Weberian apparatus was reviewed and it is believed that this study presents the first descriptions of the bones of this species. The ossicles were found to be comparatively stable within species indicating some taxonomic value. More study is …

A Comparative Histological Study Of The Adrenal Gland Of Native Rabbits, Ernest I. Gonzalez

Theses and Dissertations

A review of the literature shows that extensive work has been done on the morphology and histology of the adrenal gland of the domesticated rabbit, but it appears that little or no work has been done on other members of the order Lagomorpha. Approximately one hundred specimens of rabbits of various ages and sizes, and of both sexes, were collected over a period of nine months. All adrenal glands were fixed by immersion and were embedded in paraffin. The majority or the glands were sectioned at eight or twelve miora, and were stained with Mallory's triple stain. This investigation shows …

A Comparative Anatomical Study Of The Digestive Systems Of The Desert Jack Rabbit And The Pika, Dale Stanley Rupert

Theses and Dissertations

It is the purpose of this study to make gross and histological comparisons of the various segments of the intestinal tracts of the jack rabbit and the pika. The two animals used for this study were the desert jack rabbit (Lepus Californicus deserticola Mearns), and the pika (Ochotona princepts uinta Hollister). The jack rabbits were found only in the desert valleys and low foothills in the areas studied. These areas are typically open bush or sage brush types of communities. The pikas were restricted to certain high rockslides in this region. These areas are described more completely in the section …

A Preliminary Study Of The Siphonapterous Ectoparasites Found On The Mammals Of The Families Cricetidae And Muridae In Utah County, Vernon J. Tipton

Theses and Dissertations

The purpose of this study was to determine the species of fleas infesting the mammals of the families Cricetidae and Muridae in Utah County. This was accomplished by establishing twelve collecting stations throughout the county from which 198 mammals were collected. From these hosts, 392 fleas were collected representing three families, nineteen genera , and twenty-four species. Four species are new to the State of Utah and twenty-two species are recorded from Utah County for the first time.

Life History Studies Of The Mouse, Peromyscus Truei Nevadensis, Lowell S. Miller

Theses and Dissertations

Peromyscus truel's a fairly common inhabitant of the upper sonaranlife zone of the Western States. It is an excellent laboratory anlmal with the limitation that captivity must be accompanied by forced activlty, in order to keep the animals within the limits of normal activity. This mouse is polyestrous and breeds from early spring to late fall. Observations have shown pregnancy in late September and in early February. It is the writer's belief that ovulation in the ovary occurs only when copulation has taken lace, because corpora lutea has only been found in pregnant or lactating females. The evidence is scanty …

A Seasonal Study Of Food Of Some Birds Of The Wasatch Chaparral, Herbert H. Frost

Theses and Dissertations

A seasonal change occurred in the type of food consumed by the birds studied. Plant food was more important in the winter than in the summer. Animal food, except in one species, was found to be more important during the summer months. The most important plant foods determined by frequency and listed in order of their abundance were: Helianthus annuus, Celtis sp., Quercus sp., Polygonum convolvulus, Amaranthus blitoides, Chenopodium album, and Amaranthus graecizans. The most important animal foods based on occurance in stomachs examined were: Coleoptera, Hymenoptera, Lepidoptera larvae, Orthoptera, Undetermined larvae, Diptera, Homoptera, Coleoptera larvae, Araneae, and Hemiptera. Seventeen …

Mammals Of Utah County, James W. Bee

Student Works

Based on the premises that an accurate determination and description of the mammals of Utah County is a prerequisite for subsequent research in ecology, geographic distribution and evolutionary taxonomy, this thesis is submitted. While it is essentially taxonomic, there are included related subjects to permit a more thorough interpretation of the subject as a whole.

Summarizing, the objectives are:

• a. To list and key the known mammals of Utah County with descriptions and measurements.
• b. To ascertain their geographic range within the county.
• c. To present significant ecological and geological data for the proper appreciation of the problems of evolutionary …

A Taxonomical, Morphological And Distributional Study Of The Utah Cyprinidae /|Cby Sheldon Phipps Hayes, Sheldon Phipps Hayes

Theses and Dissertations

The hydrography of Utah may be thought of as being roughly divided into two large general drainage areas--, the Colorado River draining the eastern halt and southern portion ot the state and the Bonneville Drainage encompassing the remaining part of it. Earlier workers have listed eight genera and fourteen species of minnows occuring in Utah. Of these this report includes seven genera and ten species found within the borders of our state.