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Articles 1 - 12 of 12

Full-Text Articles in Life Sciences

Prey Utilization By Nesting Golden Eagles In (Aquila Chrysaertos) In Central Utah, William Bruce Arnell Aug 1971

Prey Utilization By Nesting Golden Eagles In (Aquila Chrysaertos) In Central Utah, William Bruce Arnell

Theses and Dissertations

During the spring of 1969 and 1970, 28 Golden Eagle eyries in four locales in central Utah were observed to determine the prey utilized during the nesting season. Visits were made every two weeks to the eyries. Prey were removed from the nests upon counting to avoid recounting at the next visit. Sixteen species of vertebrates were found as prey for nesting Golden Eagles. Mammals comprised 96 per cent of the prey, and lagomorphs alone accounted for 92 per cent. The blacktail jackrabbit occurred as 77.8 per cent of all prey items. Avian species constituted 3.9 per cent ...


Predatory Activity Of Chrysopa Carnea Stephens In The Integrated Control Of Mite Pests In Utah Apple Orchards, Ray R. Bingham Aug 1971

Predatory Activity Of Chrysopa Carnea Stephens In The Integrated Control Of Mite Pests In Utah Apple Orchards, Ray R. Bingham

Theses and Dissertations

Mite pest problems in Utah apple orchards became generally serious about 1944, when DDT was first used extensively to control Codling moths, Carpocapsa pomonella (Linn.) (Jorgensen, 1967}. Since then several investigators (Pickett et al., 1946; Lord, 1949; Pickett, 1955; Lord, Herbert, and MacPhee, 1958) have examined the influence of various spray programs on apple orchard fauna, while still others (Clancy and Pollard, 1952; Morgan, Anderson, and Swales, 1958; Oat-man and Legner, 1962) have conducted related studies with widely used broad spectrum pesticides on apple mites and their predators. All seem to lend credence to the theory that mite pest problems ...


A Study Of Snail Hosts For Fasciola Hepatica In Utah Valley, Robert Michael Briem Aug 1971

A Study Of Snail Hosts For Fasciola Hepatica In Utah Valley, Robert Michael Briem

Theses and Dissertations

The Meat Inspection Division of the Bureau of Animal Industry in 195 0 reported that 322,647 livers or 2. 4% of 13,112,802 cattle slaughtered under United States Federal Inspection were condemned due to liver fluke infections (Price, 1953). This would amount to an annual loss of 3 million dollars in livers alone considering each liver weighed 10 pounds and retailed 65 cents per pound. This figure could conceiv-ably double or triple if additional losses due to animal death, decreased milk production, poor economic utilization of feed or lower livestock prices were considered.


Ecology Of Badgers In Curlew Valley, Utah And Idaho With Emphasis On Movement And Activity Patterns, Frederick G. Lindzey May 1971

Ecology Of Badgers In Curlew Valley, Utah And Idaho With Emphasis On Movement And Activity Patterns, Frederick G. Lindzey

All Graduate Theses and Dissertations

Between March, 1969 and July, 1970, 16 badgers (Taxidea taxus) were caught and fitted with radio transmitters in the southern part of Curlew Valley. The animals were followed telemetrically; seven animals contributed sufficient data from which home-range, movement and activity patterns could be discerned. The aver age annual home-range size of five females was 664 acres (± s.d. 99 .5 acres). Female home-range sizes were approximately the same within crested wheat-grass (Agropyron aristatum) and sagebrush (Artemisia tridentata) vegetation types, with greater distances traveled each night by females in the crested wheat-grass. Both home-range size and total movement were less during ...


Market Structure Analysis Of Fertilizer Distribution In Utah, John C. Welty May 1971

Market Structure Analysis Of Fertilizer Distribution In Utah, John C. Welty

All Graduate Theses and Dissertations

The purpose of this paper was to ascertain the contribution of various structural variables to a growing, efficient system of fertilizer distribution in the state of Utah. A questionnaire to survey the fertilizer distributors was used as a source of data. Information was obtained about structural changes in a five-year period, 1965 to 1970. A multiple regression program was used to synthesize these data to determine which variables were most significant and bow much they contributed to an increase in total value of fertilizer sales. While empirical data were obtained only for structural dimensions of the industry, marketing theory was ...


Estimating Agricultural Production Functions From Experimental Data For Different Crops In Relation To Irrigation, Fertilization And Soil Management In Northern Utah, Subramaniuam Swami Nathan May 1971

Estimating Agricultural Production Functions From Experimental Data For Different Crops In Relation To Irrigation, Fertilization And Soil Management In Northern Utah, Subramaniuam Swami Nathan

All Graduate Theses and Dissertations

Estimates of agricultural production functions from experimental data for four different crops in relation to six variable inputs are calculated by this study. There are four basic sections in the study. The first section covers the review of production function concepts and the procedures and problems that specifically pertain to this study. Also the importance of joint economic-agronomic research efforts, methodologies and applications of agricultural production functions are cited.

The second section includes the presentation data and postulated functional relationships in estimating production functions. Model building programs are used in developing three dimensional figures, which aid in the selection of ...


The Effects Of Available Water Upon Populations Of Chukar Partridge On Desert Mountains Of Utah, William W. Shaw May 1971

The Effects Of Available Water Upon Populations Of Chukar Partridge On Desert Mountains Of Utah, William W. Shaw

All Graduate Theses and Dissertations

The importance of surface water to chukar partridges (Alectoris graeca) and the feasibility of rain-catchment devices for improving chukar habitat were studied on the Thomas and Dugway Mountain Ranges in western Utah during 1969 and 1970.

Sources of surface water were removed from one mountain rang~ and chukar populations on that range were compared with populations on an adjacent range with permanent sources of water.

Providing drinking water did not improve chukar productivity, survival, or availability to hunters. Although most birds concentrated around water supplies in the summer, some chukars appeared to live completely independent of any permanent sources of ...


A Study Of Factor Input Services In Cache County, Utah, 1969, Terry N. Peterson May 1971

A Study Of Factor Input Services In Cache County, Utah, 1969, Terry N. Peterson

All Graduate Theses and Dissertations

Fertilizer, feed and machinery dealers we re interviewed to obtain the extent of the services which they provided to farmers in Cache County. One machinery dealer provided a service in the form of a rental program while all others provided none. Fertilizer dealers provided spreaders while feed dealers provided only a delivery service.

The Farm Service Division of the Amalgamated Sugar Company was examined as a case study. Budgets for different sizes of beet growers were formulated and compared to evaluate the services provided. It was determined that the farmers in the 0-10 acre category received a net return per ...


Economic Rent Values For Pheasant Hunting In Utah, Braulio Rodriguez V. May 1971

Economic Rent Values For Pheasant Hunting In Utah, Braulio Rodriguez V.

All Graduate Theses and Dissertations

A conceptual model relating recreation resource values to the concept of economic rent was developed. The model argues that recreation sites possess both quality and location characteristics which serve as rent producing agents. Sites of better quality extract economic rents relative to those of lesser quality while those located most advantageously to user origins earn location rents relative to those more distantly located. The economic rent values are expressed by the differential use costs and recreationist activity associated with individual site usage.

A methodological procedure was developed which generates estimates of total rent values for a given site. The procedure ...


Spring And Summer Habitat Preferences Of Blue Grouse On The Bear River Range, Utah, Robert M. Maestro May 1971

Spring And Summer Habitat Preferences Of Blue Grouse On The Bear River Range, Utah, Robert M. Maestro

All Graduate Theses and Dissertations

A study of the spring and summer habitat preferences of blue grouse was conducted on the Bear River Range in northern Utah. The main objective was to determine the important factors associated with habitat selection by blue grouse during the breeding season.

One hundred and two sampling areas, delimited by similarities in vegetation and topography, were thoroughly searched with a dog for blue grouse. Fifty-four bio logical and physical variables were measured for each sampling area.

Chi-square tests performed on all variables showed 11 of the 54 variables to be significant at an alpha of 0.20. These 11 variables ...


Carrying Capacity Of The Key Browse Species For Moose On The North Slopes Of The Uinta Mountains, Utah, David E. Wilson May 1971

Carrying Capacity Of The Key Browse Species For Moose On The North Slopes Of The Uinta Mountains, Utah, David E. Wilson

All Graduate Theses and Dissertations

The Shiras moose, Alces alces shirasi, and its winter habitat on the north slopes of the Uinta Mountains in Utah were studied from August, 1969, to July, 1971 to determine the food requirement for moose, the key browse species during the winter months, the acreage, density and utilization of the key browse species, and their carrying capacity for moose.

It was determined that an average adult moose had a daily food requirement of 19,133 kilocalories. The key browse species for moose were Salix drummondiana and S. geyeriana. These two species accounted for 92.0 and 4.7 percent respectively ...


Investigation Of Urolithiasis Occurring In Hatchery-Reared Trout In Utah, Ernest H. Dean Jr. May 1971

Investigation Of Urolithiasis Occurring In Hatchery-Reared Trout In Utah, Ernest H. Dean Jr.

All Graduate Theses and Dissertations

The urolithiasis condition investigated occurred at a "hard water" hatchery in Utah after the trout were changed from a meat diet to a commercial pelleted fish feed as a sole sustaining diet in 1961. Numerous diet modifications proved unsuccessful in preventing urolithiasis at the hatchery. It was eventually determined that different commercial diets resulted in varied percentages of trout developing urolithiasis. The urolithic deposits found in the kidney tubules were amorphous and composed of calcium phosphate (apatite) and an organic matrix. Bacterial contamination of the kidneys was not an important factor in the formation of urolithiasis. Rainbow trout containing urolithic ...