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Stability Of Small Unisexual-Bisexual Populations Of Poeciliopsis (Pisces: Poeciliidae), William S. Moore

Biological Sciences Faculty Research Publications

All-female species of Poeciliopsis depend upon ♂ ♂ of closely related species for sperm. This relationship creates a competitive situation in which bisexual ♀ ♀ compete with unisexual ♀ ♀ for sperm from ♂ ♂ of the bisexual species. Earlier studies demonstrated a sufficient mechanism inherent in the behavior of ♂ ♂ for allowing coexistence in mixed unisexual-bisexual populations. Courtship preference of ♂ ♂ for conspecific ♀ ♀ is dynamically countered by social interaction among ♂ ♂ : subordinate males mate with unisexual ♀ ♀ in impetuous courtships. The Poeciliopsis monacha-Poeciliopsis 2 monacha-lucida complex occurs naturally in small isolated populations …

Microbenthic Algal Production Of An Intertidal Sandflat In Little Creek Harbor, Virginia Beach, Virginia, Clayton Barry Shedrow

OES Theses and Dissertations

Estimated annual net microbenthic algal production of an intertidal sandflat on Little Creek Inlet, Virginia Beach, Virginia, was 105 g C/m². Seasonally, primary production was greatest during the summer and fall periods (38 and 49 g C/m², respectively). Productivity was found to vary directly with water temperature and standing crop of benthic diatoms, and inversely with incident solar radiation and standing crops of sedimentary chlorophyll 'a' and 'c'. Orthophosphate and nitrate-N appeared to be limiting factors, nitrate-N more so than orthophosphate. Mean annual net photosynthetic efficiency (based upon total light) for the microphytobenthic community was 0.09%. …

Genetic Studies Of Cave And Spring Populations Of The Freshwater Amphipod Crustacean Gammarus Minus Say, Steven Wolf Hetrick

Biological Sciences Theses & Dissertations

The amphipod Gammaru. minus has three morphotypes in its Appalachian range : (1) a spring form with well-developed eyes, (2) an intermediate cave form with slightly reduced eyes, and (3) an extreme cave form with greatly reduced eyes. This study compares the genetic structure of populations in two karst areas and analyzes the genetics of populations of the three morphotypes.

Genetic data were collected from populations in the Ward's Cove, Virginia and Greenbrier Valley, West Virginia karst areas using zone electrophoresis zymograms. One hundred percent of the Ward's Cove populations are polymorphic at both MDH-1 and PEP 1 loci …

Vegetation Development In Relation To Age Of River Stabilization Structures Along A Channelized Segment Of The Missouri River, John Arthur Vaubel

Nebraska Game and Parks Commission: White Papers, Conference Presentations, and Manuscripts

During the summer of 1974, I sampled sites of vegetation representative of successional trends in plant communities along the Missouri River floodplain from Sioux City, Iowa, to Rulo, Nebraska. Five district community types listed from youngest to oldest are as follows: Salix spp. – dominated, Populus deltoides – dominated, Platanus occidentalis-Ulmus rubra – dominated, Tilia americana-Quercus rubra – dominated, and Quercus macrocarpa-Carya ovata – dominated vegetation.

The technique of relating vegetation succession to age of river stabilization structures was found to be useful and offered a quite precise method of developing a timescale …

Shell Growth In The Scallop Argopecten Irradians. I. Isotope Incorporation With Reference To Diurnal Growth, Alfred P. Wheeler, Patricia Blackwelder, Karl M. Wilbur

Marine & Environmental Sciences Faculty Articles

1. Incorporation of calcium and carbonate into shell has been studied in the scallop Argopecten irradians using ⁴⁵Ca and ¹⁴C-bicarbonate.

2. The incorporation of ⁴⁵Ca and ¹⁴C-carbonate into shell was linear with time after a lag period of 1 to 2 hours. The shell-forming mantle tissue attained a steady state with respect to ⁴⁵Ca in the sea water medium within 2 hours.

3. The molar ratio of ⁴⁵Ca to ¹⁴C-carbonate deposited in shell was not significantly different from unity during 5 hours.

4. The rate of incorporation of ¹⁴C-carbonate into shell was …

Performance Appraisal In Hospital Dietary Departments, Mary C. Law

Loma Linda University Electronic Theses, Dissertations & Projects

The specific objectives of this research were to (1) identify the principal characteristics and functions of performance appraisal programs utilized in hospital dietary departments, (2) determine the ten major factors in performance appraisal as indicated by the hospital dietary department directors as well as by dietetic interns and the factors indicated in the review of literature, and (3) develop an evaluation form for performance appraisal of hospital dietary department employees utilizing criteria obtained from (1) and (2).

Three hundred general, short term, nonprofit hospitals were included into the study. Questionnaires were mailed to three hospitals which were classified according to …

Raptor Temperature Regulation And Energetics, James Arthur Mosher

Theses and Dissertations

A review of energetics studies of raptorial species introduces four separate studies of temperature regulation by raptors. Golden Eagle (Aquila chrysaetos) nest site selection, as influenced by direction of exposure, is discussed. The data show strong directional preferences to the NNW by southern populations and SSE by northern populations. The tarsometatarsus is shown to have a thermoregulatory function in large falcons, and adaptations of this mechanism to varied habitats are examined. Color phase in Screech Owls (Otus asio) is shown to be related to metabolic differences that may explain the distributions of the color morphs. Development of thermoregulation in Flammulated …

An Evaluation Of The Fishery Resources Of The Thames River Watershed, Connecticut, Connecticut Department Of Environmental Protection

Storrs Agricultural Experiment Station

No abstract provided.

Kentucky Warbler (Vol. 51, No. 2), Kentucky Library Research Collections

The Kentucky Warbler

No abstract provided.

Seasonal And Spatial Variation In Primary Productivity In Boulder Basin, Lake Mead, Clark County, Nevada, Isamu Aoki

Publications (WR)

The ¹⁴C light and dark bottle technique for measurement of primary production was utilized as a means of assessing the amount of inorganic carbon being converted Into organic form by the photosynthesis of phytoplankton populations In the Boulder Basin of Lake Mead.

Spatial and time series changes of productivity levels observed at eight sampling locations within Boulder Basin Indicate that the Influence of treated municipal arts' industrial effluent flowing into Les Vegas Bay is contributing high levels of available nutrients at Las Vegas Wash Inlet to cause productivity to approximate those levels associated with polluted waters.

Productivity levels at …

Respiratory Metabolism And Energy Requirements Of Embryo, Larval And Juvenile Mountain Whitefish, Prosopium Williamsoni, Pokkavil Karunakara Rajagopal

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The upper optimum temperature for embryonic development of mountain whitefish is 6 C, and for the post yolk sac stage is 9 to 12 C. The need to know effects on all stages in the life cycle in cases of thermal pollution is demonstrated. Abnormalities caused by thermal pollution in hatched larvae were agape jaws, coloboma or fissure of the eye, monophthalmia or the presence of only one eye, monomicrophthalmia or the presence of one small eye and one case of twinning. High mortalities of eggs occurred at 9 C and higher.

Study of the energy expenditure, by the dry …

Evaluation Of A Vapor Pressure Osmometer For Determination Of Added Water In Milk, Kietipong Pensiripun

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A Wescor Vapor Pressure Osmometer measured the osmolality of a solution by sensing the vapor pressure above the solution in a closed chamber. The instrument sensing element comprised a precision thermocouple which measured the dew point temperature depression, a function of the water vapor pressure in the chamber. It used approximately 5-7 microliter samples to saturate a 0.64 cm filter paper disc. The instrument fixed a milliosmolal digital reading and signaled test completion in 110 seconds. The instrument weighed approximately 3. 62 kilograms, was 26. 7 x 24. 1 x 10. 2 cms in size and had a range of …

The Influence Of Climate On Biomass And Mineralomass Of A Crested Wheatgrass Community In Northern Utah, Randall S. Shinn

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Aboveground biomass, litter biomass and root biomass of a crested wheatrgrass (Agropyron desertorum [Fisch.] Schult.) dominated community were inventoried in the fall of 1971, 1972, and 1973. In addition, energy, nitrogen, fats and ash determinations were made on the materials collected in 1972 and 1973.

The sampling methods used generated data sufficiently precise to detect significant differences (α = .10) among biomass components among years. The chemical contents of the components were similar in the fall of 1972 and the fall of 1973 despite the large differences in growing season precipitation.

A simple linear regression formula was generated from …

An Interregional Competition Study Of Utah Agriculture Using The Linear Programming Technique, Douglas Lee Andersen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purposes of this paper were to inventory the available agricultural production resources in Utah, to determine how those resources could be allocated most efficiently, and to provide information to aid the crop and livestock producing sectors in Utah in making informed production and marketing decisions.

Utah was divided into eight agricultural production and product consumption regions and the rest of the country was regionalized into product supply and market areas. Input and output coefficients, production costs, and market prices for the major Utah crop and livestock production enterprises and their products were developed. A linear program was then used …

Nutritional Quality And Herbage Production Of Intermediate Wheatgrass (Agropyron Intermedium [Host] Beauv.) When Infested With Black Grass Bugs (Labops Hesperius Uhler), Alan M. Gray

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Two intermediate wheatgrass seedings with different levels of grass bug infestation were evaluated for herbage production, seedhead production, percent dry matter, crude protein, and cell contents. Study sites were located at different elevations on mountain summer ranges in northern (Site I) and central (Site II) Utah. Study plots at Site I and Site II were infested with 113 and 210 bugs per sweep, respectively. Herbage production appeared to be reduced in early spring on the site with the higher infestation; however, no effect on season-long herbage production could be detected on either site. Seedhead production on infested plots was reduced …

Factors Influencing Germination And Seedling Survival Of Several Varieties Of Astragalus Lentiginosus Dougl., Paul Ziemkiewicz

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Astragalus lentiginosus, which consists of 36 varieties, is one of the principal locoweeds of western North America. The objectives of this study included identification of some of the major factors affecting germination of the seed and survival of the newly established seedlings for several of these varieties.

The seeds of the varieties studied exhibited two mechanisms for dormancy. One is a seed coat that is impermeable to water, and the other is a water-leachable inhibitor. The presence or absence of low-intensity incandescent light (in 14-hour day lengths) had no effect on germination. Of three temperature regimes studied, the regime …

Exploratory Sensitivity Analysis Of A Stream Ecosystem Model, Joseph H. Wlosinski

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The framework of a stream ecosystem simulation model is described. Using this framework and data from two different geographical areas, a cold desert stream and a generalized mountain stream, exploratory sensitivity analysis was performed on the model. This was accomplished by qualitatively comparing outputs of a series of simulations in which a different level of a driving variable was used in each simulation. Based on these results, recommendations are made for improving the structure of the model.

Gas Exchange And Water Relations Of Two Alpine And Two Arctic Tundra Plant Species, Douglas Allan Johnson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Although water stress is an important selective force in many environments, it is not commonly considered to be of particular importance in tundra areas. Even though large portions of tundra may have an abundance of water, other more exposed areas may become quite dry. This microsite variability with respect to moisture stress was reflected in soil water potential measurements obtained from an alpine tundra area on Niwot Ridge in Colorado. Even though soil water potentials were consistently above -5 bars in a relatively low lying Deschampsia meadow, soil water potentials from an exposed fellfield area were often as low as …

Structure Of Songs And Organization Of Singing In Fox Sparrows Breeding In Northern Utah And Southern Idaho, Dennis John Martin

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Structure of songs and organization of singing in 133 Fox Sparrows Passerella iliaca were studied during 2 breeding seasons in 3 geographically separate populations in northern Utah and southern Idaho. The structure of songs was analyzed with the aid of an audiospectrograph. The organization of the singing of songs in 56 birds was analyzed by applying Markov chain analyses to the sequences of songs uttered.

Songs were composed of syllable-types, of which 49 were recognized. Syllable-types could occur singly or be serially repeated within songs, but they were never fractured so that only a portion of one would be in …

The Utah Prairie Dog: Abundance, Distribution, And Habitat Requirements, G. Donald Collier

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Objectives of this study were: (1) to determine the status of the Utah prairie dog (Cynomys parvidens, Allen), a rare mammal endemic to south-central Utah, and (2) to identify habitat factors which limit densities of this species. Seven components of the habitat were studied: barriers, other animals, soil, temperature and precipitation, topography, vegetation, and water. Prior to collection of habitat data, virtually all populations of the species were found by extensive searching and interviewing; the number of animals and the area occupied were determined for each population.

Results justified the endangered status of the Utah prairie dog. Area occupied by …

The Reproductive Cycle Of Male Uinta Ground Squirrels And Its Relationship To Pineal N-Acetyltransferase And Monoamine Oxidase In The Testes, Hypothalamus And Pituitary, Robert Alexander Palmer

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A study was made of the reproductive cycle of male Uinta ground squirrels (Spermophilus armatus) during the activity seasons of 1973 and 1974 and during the aestivation/hibernation (A/H) period of 1973-1974. Physiological data collected were compared to changes in monoamine oxidase (MAO) activity of the testes, pituitary and hypothalamus and to pineal N-acetyltransferase activity.

Male Uinta ground squirrels began emerging from their burrows on April 12, 1973, and April 8, 1974, with average body weights of 302 g and 301 g, respectively. Body weight did not increase greatly during breeding, but rose rapidly to over a 500 g …

State Of The Fisheries Report 1974, Department Of Fisheries And Wildlife, Western Australia

Status Reports of the Fisheries and Aquatic Resources

The total value of the fisheries of Western Australia is the highest of any of the States, and the Western Australian rock lobster fishery is the most valuable single fishery in Australia.

Abstracts Of Papers Scheduled For Presentation At The 87th Session Of The Iowa Academy Of Science, April 19, 1975, Iowa Academy Of Science

Iowa Academy of Science Documents

No abstract provided.

The 87th Session Of The Iowa Academy Of Science, April 17-19, 1975, Iowa Academy Of Science

Iowa Academy of Science Documents

No abstract provided.

Close Coupling Test Of Classical And Semiclassical Cross Sections For Rotationally Inelastic Ar-N2 Collisions, Russell T. Pack

Faculty Publications

Accurate quantum mechanical close coupling (CC) integral cross sections are reported for rotationally inelastic Ar-N2 collisions at room temperature using an empirical intermolecular potential. These cross sections are used to test the infinite order sudden (IOS) approximation and the results of several methods [classical trajectories (CT), full sudden (SA), generalized phase shift (GPS), and classical limit generalized phase shift (CGPS)] as reported in the preceding paper by Pattengill. The IOS approximation works very well for cross sections involving low rotational states. The CT method works well for all the cross sections examined, justifying the popular belief that the rotational motion …

The First 50 Years: Agricultural Engineering, Henry H. Delong

Agricultural and Biosystems Engineering Publications

This is a history of the first 50 years (1925-1975) of the Department of Agricultural and Biosystems Engineering at South Dakota State University, including lists of departmental projects and faculty members.

Chapter I: Introduction
Chapter II: The Beginning of Our Department
Chapter III: Progress in the 40's
Chapter IV: The Growth Picture of the 50's
Chapter V: The Expanding 60's
Chapter VI: The Unique Project of Rammed Earth Construction
Chapter VII: Agricultural Extension Work by the Agricultural Engineers
Chapter VIII: Ag Engineers Take Part in Experiment Station

Use Of Selected Macroinvertebrates As Indicators Of Sedimentation Effects On Huntington River, Utah, Michael Kenneth Reichert

Theses and Dissertations

Benthic macroinvertebrate communities of Huntington River, Emery County, Utah were studied to determine effects of sedimentation from construction of Electric Lake Dam, a state highway, and two bridges. Approximately 900 benthic samples were collected from riffle areas above, in, and below the construction zone from January, 1971 to December, 1973. Two settling basins below construction sites were effective in limiting scouring of downstream communities. Heavy silt deposition was limited to a 1-km stream reach. Number of indicators, density, and biomass were reduced in the construction zone during periods of sediment input. During periods of scouring, density and biomass were reduced; …

In Vivo Quantitation Of Adipose Tissue By Differential Absorptiometry Using Penetrating Isotopic Radiation, Luther E. Preuss, Frank B. Bolin, Claudius K. Bugenis

Henry Ford Hospital Medical Journal

The physical principles for determining tissue lipid content In vivo by selective radiation attenuation have been studied and are compared to other methods of body composition analysis. Two penetrating photon beams, each monoenergetic but of differing energies, are simultaneously passed through the low Z components of tissue and the relative beam absorption measured. A mathematical function incorporating the unabsorbed and absorbed photon beam intensities is applied to determine experimentally the relative proportion of fat and lean in the tissue. '"Cd is used as the radioactive source of both xrays and gamma radiation. Results of experiments on low 2 phantom material …

The Prairie Naturalist Volume 7, No.1. March 1975

The Prairie Naturalist

MIGRATION OF BIRDS IN NORTH DAKOTA DURING FAll 1974 ▪ J. T. Lokemoen & D. H. Johnson.

REPRODUCTION AND DEVELOPMENT OF FOUR MALLARD LINES ▪ R. J. Greenwood

1974 Seed Yield Of Early Maturing Crossbreds Under Wheatbelt Conditions, C. M. Francis

Experimental Summaries - Plant Research

Small plot trials sited at Merredin, Bencubbin and Bungil again demonstrated the 'bred' varieties to be at least the equal of Geraldton or Northam A under wheatbelt conditions. Growing season conditions at Bencubbin were the best for pasture in recent years. Merredin and Bungil also received above average rainfall but encountered dry conditions in September. Predictably the coarse siliceous nature of the Wodgil soil at Bungil in conjunction with the dry period produced very low seed yields. Crossbred 175.1.3 the leading crossbred at Merredin in 1973, was again significantly better than Geraldton or Northam A at Merredin and Bungil (Table …