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The Butterflies And Skippers Of The Tunica Hills Of Southeastern Louisiana And Southwestern Mississippi., Michael Lawrence Israel

LSU Historical Dissertations and Theses

The Tunica Hills region is located in West Feliciana Parish, Louisiana and north into Wilkinson County, Mississippi. It is characterized by hills 60-122 m above sea level that are composed of loess deposits. A mixed mesophytic forest association dominated by magnolia, holly and beech occurs here. A 3 1/2 year study was instituted to examine the butterfly and skipper species of this area. A lowland area (Polly Creek) 30.48 m in elevation and a higher area (Highlands) 97.54 m in height were intensively sampled. Previous records were compiled with the data taken during 1977-1980. Eighty-two species of butterflies and skippers …

Environmental And Genetic Effects Upon Growth Of Purebred And Crossbred Heifers At Beltsville, Jeanerette And Reidsville., Marcus Cordeiro Duraes

LSU Historical Dissertations and Theses

Data from the Southern Regional Dairy Cattle Breeding project (S-49) were analyzed by least square methods to evaluate genetic and environmental effects upon body weight and body weight gain. Data consisted of records on 1,352 purebred Ayrshire (A), Brown Swiss (S), Holstein (H) and Jersey (J) and 1,224 crossbred females. Sixty-one different major breed combinations were represented. Breed groups (PLB) represented proportion of a large breed (Brown Swiss and Holstein). According to this classification, six PLB groups existed at USDA, ARC, Beltsville, Maryland, four at Iberia Livestock Experimental Station, Jeanerette and eight at Georgia Coastal Plains Experimental Station, State Prison …

Methanogenesis In Marine Sediments Of The Mississippi River Delta., Leonard Alan Hook

LSU Historical Dissertations and Theses

The highest most probable numbers (MPNs) of methanogens (1.18 x 10('6) cells per 100 g sediment, dry weight) and sulfate-reducers (0.31 x 10('6) cells per 100 g sediment, dry weight) in unstable, gas-rich, Mississippi River delta sediments occurred together in samples taken 0.2m below the sediment-water interface. The presence of sulfate-reducers was directly related to dissolved sulfate in the interstitial water. Dissolved methane in the sediments was inversely related to the presence of sulfate-reducing bacteria. Methanogens and sulfate-reducers were recovered from maximum depths of 29.3 and 75.0 m, respectively. Two horizons of dissolved sulfate, with peaks of sulfate-reducer MPNs, indicated …

Mitotic Triggers In The Cell Cycle: Phase Dependency Of Cleavage Advance On The Chromosome Cycle In Parthenogenetically Activated Sea Urchin Eggs., Barbara Ellen Wolfanger Belisle

LSU Historical Dissertations and Theses

In the sea urchin egg, metabolic activation, DNA synthesis and the chromosome cycle can be induced with parthenogenic activators (NH(,4)Cl or procaine) although no spontaneous cleavage will occur. To determine the effects of these agents on other cell cycle events, eggs from four species of sea urchins were activated with NH(,4)Cl or procaine and then fertilized at different times of the chromosome cycle. These eggs show a decrease in the time to first cleavage which is apparently coupled to the parthenogenecally induced chromosome cycle. The advance is seen whether the activated eggs are fertilized during the first or second chromosome …

The Influence Of Exogenous Plant Growth Regulators On Sucrose Accumulation In Sugarcane (Saccharum Sp.)., Gerald Matthew Dill Jr

LSU Historical Dissertations and Theses

The effect of glyphosate on immature internodal tissue of three sugarcane varieties was examined. Sucrose content (mg/g dry wt) increased after treatment application throughout the 7 week period of sampling in the experiment in all varieties examined. Increases in sucrose percent and commercially recoverable sugar per ton (CRS/T) determined by whole stalk analysis were observed in NCo 310 and CP 61-37 4 weeks after glyphosate application. A greater percent increase in sucrose content of immature internodal tissues over control than that observed by whole stalk analysis was noted at this time. The plant growth regulators glyphosine, ethephon, mefluidide and glyphosate …

Growth, Development, And Synchronization Of Larval Diatraea Saccharalis And Characterization Of Plasma Juvenile Hormone Esterase., Richard Michael Roe

LSU Historical Dissertations and Theses

Male sugarcane borer, Diatraea saccharalis (F.), larvae at egg hatch were equal in weight to females, but on artificial diet, pupated in less time and achieved a smaller larval maximum and 1 day old pupal weight. The peak period for egg hatch and ecdysis was within a few hours after lights-on, and pupation occurred at random. Males completed larval development in 5 and 6 stadia and females in 6 stadia. Net larval growth was greater for males and females completing development in 6 stadia than in 5 stadia. Ecdysis to the last stadium occurred during the 12th to 14th day …

A Systematic Study Of The Mexican, Central American, And Jamaican Species Of The Genus Calea., James Richard Wussow

LSU Historical Dissertations and Theses

Calea, a large genus in the Asteraceae, tribe Heliantheae, consists of mostly shrubs that occur throughout the Neotropics. Robinson and Greenman's treatment of the Mexican and Central American species has remained the definitive study of Calea for this area since 1896. Recent studies, including the present one, have greatly modified their earlier treatment. From among the more than 75 names attributed to Calea in Mexico, Central America, and Jamaica, the present study recognizes 18 taxa representing 8 species and 10 varieties. The species recognized in this treatment include C. crassifolia, C. fluviatilis, C. longipedicellata, C. jamaicensis, C. prunifolia, C. ternifolia, …

A Study Of Ascus Developmental Fine Structure In Eleutherascus Peruvianus Huang With Special Reference To Ascospore Ontogeny., Walstine Lon Steffens Iii

LSU Historical Dissertations and Theses

Eleutherascus is an enigmatic ascomycete genus with some structural features common to both the Eurotiales and Pezizales. It lacks a peridium and paraphyses and typically produces an ascocarp consisting of only one or two asci and some sterile hyphae. The life cycle of E. peruvianus was studied by electron and optical microscopy. The principle events that culminate in ascospore production and germination are described and compared to their equivalents in some purportedly related species. Ascogenesis is initiated through crozier development in a manner similarly described in many Discomycetes. Additionally, a specialized septal pore cap structure (which appears structurally equivalent to …

Tree Ring Characteristics Of Baldcypress Growing In Varying Flooding Regimes In The Barataria Basin, Louisiana., Lynne Jordan Bowers

LSU Historical Dissertations and Theses

Baldcypress (Taxodium distichum L. Rich.) is a desirable species for tree ring studies due to its longevity, resistance to decay, and the statistical characteristics of the ring record (Bowers, 1973). This investigation endeavors to determine: (1) the type and number of samples needed for such studies; (2) the values of x-ray densitometry analysis with the species; (3) the usefulness of the data for delineating differences in swamp sites which differ in length of flooding and if these differences could affect wood quality; and (4) the appropriateness of the data from disturbed swamp sites in south Louisiana to dendroclimatic studies. Differences …

A Technique For Evaluating Nebraska Sandhill Wetlands., Michael C. Gilbert

Student Work

This study evaluates vegetation of Nebraska Sandhills wetlands and adjacent plant communities in order to describe them and quantitatively distinguish wetlands from non-wetlands. Field data, supplemented with 35mm color infrared imagery, distinguished four zones around a small sandhill's lake: (1) non-wetland, (2) outer marsh, (3) inner marsh, and (4) submerged aquatic zones. Community comparisons between the Lake zones and two subirrigated meadows indicate the greatest similarity occurs between non-wetland communities. Of these areas categorized as wetlands, the greatest similarity was recorded between the lakes outer marsh zone and the wetland zones of the subirrigated meadows. This lack of similarity between …

Annual Report, University Of South Florida Botanical Garden Annual Report, 1979-1980, August 1980, Frederick B. Essig

USF University Archives and Documents

Annual report for the University of South Florida Botanical Gardens for the 1979-1980 fiscal year, dated August 1980. Topics include record keeping, specimen collection, research projects, labeling of plants, volunteers, garden club visits, facilities development, finances, and goals.

Interview With Isabel Potter - Oh 089, Carrie Isabel Potter

Winthrop University Oral History Program

This interview features Carrie Isabel Potter (1900–1997), a biology instructor at Winthrop College from 1928 to 1966, who was interviewed by Winthrop student Jeff Clark for an oral history project on the college during the Great Depression. Potter reflects on her experiences as a faculty member during the early 1930s, discussing declining enrollment, reductions in state funding, faculty salary cuts and layoffs, and the effects of budget constraints on academic departments and campus programs. She describes how the Biology Department adapted by improvising and constructing equipment rather than purchasing commercially manufactured materials. Potter also recalls the close relationships among faculty …

Objectives Of Animal Use In Biology Courses, William V. Mayer

Education Collection

To confine discussion of educational use of animals to experimentation is to focus on only part of the animal use problem. To focus on use of animals in the classroom solely is to negate the value of field and community resource areas such as zoos, animal parks, nature trails, etc. The primary objective in dealing with living organisms is to inculcate a respect for all life. Objectives that focus on use of living animals for experimental purposes can, at best, be secondary and may in many cases be contrived. An understanding of animal life requirements and animal contributions is an …

No Pain Infliction By Untrained Youths, Christine Stevens

Education Collection

Outlined are the efforts of the Animal Welfare Institute (AWl) for the last twenty-five years to end abuses to animals in high school biology programs. After concluding that the AWl's two brief rules prohibiting painful experimentation were not well understood by students even after years of effort, the AWl adopted the rules of the Canadian science fairs, which are similar to the Westinghouse Talent Search in that they simply prohibit experimentation on vertebrate animals. The presentation includes reference to the AWI manual, "Humane Biology Projects."

Humaneness Supersedes Curiosity, F. Barbara Orlans

Education Collection

Ethical considerations need to be addressed with respect to educational use of animals. Society extends greater latitude in what is permissible to do to an animal in the name of science to a professional research worker than to a high school student. A balance needs to be made of the significance of the expected experimental results, on the one hand, which the ethical costs, (in terms of pain or death to the animal), on the other. A reasonable boundary can be drawn, based on ethical as well as on practical considerations, to exclude invasive procedures on vertebrate animals in high …

A Limnological Study Of 43 Selected Maine Lakes, Derrill J. Cowing, Matthew Scott

Maine Collection

A Limnological Study of 43 Selected Maine Lakes

by Derrill J. Cowing and Matthew Scott

U.S. Geological Survey : Water-Resources Investigations 80-69

Prepared in cooperation with the Maine Department of Environmental Protection

U.S. Geological Survey, 26 Ganneston Drive, August, Maine 04330

Classification And Phylogeny In The Suborder Euplotina (Ciliophora, Hypotrichida), Bruce Fleming Hill

Doctoral Dissertations

No abstract provided.

Lectins From The Horseshoe Crab, Limulus Polyphemus, Reactive With Bacterial Lipopolysaccharide, Homayoun Rostam-Abadi

Doctoral Dissertations

The Limulus serum is capable of precipitating various components of the lipopolysaccharide molecule from R mutants of Salmonella minnesota. Precipitation-inhibition studies using 2-keto-3-deoxyoctonate (KDO) have supported the hypothesis that this acidic residue is the immunodeterminant group in the core region of the lipopolysaccharide molecule. Limulus also contains a lectin which interacts with the lipid A region of lipopolysaccharide; the proposed binding site in this region is the glucosamine backbone of the lipid A molecule.

A sialic acid-binding lectin from the serum of the horseshoe crab, Limulus polyphemus, was isolated by preparative polyacrylamide slab gel electrophoresis and by ion-exchange chromatography on …

The Seasonal And Spatial Distribution Of The Marine Benthic Algae Of Tunisia, Ernani Guingona Menez

Doctoral Dissertations

A detailed study of the marine flora of Tunisia was conducted by assessing the seasonal variation of seaweed populations along a 35 m transect at one site (La Marsa), as well as by qualitatively describing the species composition throughout the country, and comparing the floristic affinities of the Tunisian flora with other Mediterranean and northeastern Atlantic areas. The occurrence and distribution of the Tunisian flora were correlated with a variety of parameters, including water temperature, salinity, substrata and currents. The seasonal studies at La Marsa, which is within the Gulf of Tunis, were undertaken monthly between October, 1974 and August, …

A Model System For The Concentration Of Reovirus From Aqueous Environments, David Marion Dziewulski

Doctoral Dissertations

A filter adsorption-elution method for the routine isolation of reovirus from model aqueous systems was developed. Reovirus was found to be stable within a pH range of 3 to 10, with a minimum loss of viability. A slight hydrogen ion excess minimized virus aggregation phenomena and promoted efficient adsorption of virus to filter surfaces. Adsorption of virus at pH 6.0 to all filters examined was enhanced by 50 mM MgCl(,2). The use of AlCl(,3) as an enhancing salt was contraindicated since reovirus was not recoverable from 0.5 mM AlCl(,3) solutions. Elution of virus was most effective when a 3% beef …

Metabolic Characteristics And Susceptibility To Laminitis In Morgan And Thoroughbred Horses, Colette Helene Janson

Doctoral Dissertations

Laminitis, an inflammation of the lamina in the equine foot, is one of the least understood of the common equine diseases and is considered to be one of the greatest problems facing the horse owner and veterinarian today. The incidence of, and breed susceptibility to, this disease has never been formally assessed. Many practitioners feel that susceptibility may be related to metabolic imbalances. The purpose of this study was to tabulate current clinical information from a nationwide survey, to examine two breeds of horses, one of which has a greater incidence of laminitis, and to investigate metabolic parameters which may …

Self-Incompatibility In Cheiranthus Allionii, Lee Anne Chaney

Doctoral Dissertations

The presence of a self-incompatibility (SI) system in the polyploid crucifer, Cheiranthus allionii = Siberian wallflower, was suggested by results of greenhouse screening and confirmed by results of controlled pollinations in the field. Sporophytic control of the system was indicated by a stigmatic barrier to incompatible pollen tube growth, seen in scanning electron micrographs, and by differences in reciprocal cross-compatibilities. Strength of the SI system varied, but no completely self-compatible plants were found. Marked segregation for SI level within self- and cross-progenies of a plant with weak SI suggested that weak SI might be due to a single gene. The …

Influence Of Genotype, Protein-Calorie Restriction And Their Interaction Upon Rsv-Induced Tumors In Chickens, Kathy Kirsten Clark

Doctoral Dissertations

The major objective of this research was to investigate the relative contribution of genetics, nutritional restriction and the genetics by nutritional restriction interaction upon Rous sarcoma virus (RSV)-induced tumor development in chickens. Two genetic systems were used. The first involved an inbred line and a noninbred line of chickens. The second utilized F2 generation progeny from a cross of lines 6-1 and 15-1, highly inbred lines of White Leghorns from the Regional Poultry Research Laboratory of the United States Department of Agriculture at East Lansing, Michigan. These chickens had been blood typed for allcantigens coded for by genes of the …

The Functional Role Of Asterias Vulgaris Verrill (1866) In Three Subtidal Communities, Alan Wilson Hulbert

Doctoral Dissertations

The functional role of Asterias vulgaris has been investigated in three subtidal communities at the Isles of Shoals, New Hampshire, U.S.A., from 1975 to 1980. The three communities are located at depths of 8 m, 18 m, and 30 m along a transect from the intertidal to a depth of 35 meters on rocky substrate of an exposed shore.

Components of the study based on in-situ observations included an analysis of population structures, feeding biology, flux rates, predators and natural history of Asterias vulgaris in the 3 communities. The feeding data shows a series of prey specializations by size such …

The Challenge And Motivation Of Students Through Live Animal Projects, Thurman S. Grafton

Education Collection

The subject of use of live animals by secondary schools either in classroom work or science fairs is a very controversial and often emotional issue. The author emphasizes the dedication to humane treatment of animals while at the same time explaining the process by which rules have been formulated to provide for the appropriate use of live animals. The difference between permission and mandate is clarified for the purpose of explaining the need to provide for the more effective challenge and motivation of the high achiever while still allowing for more modest undertakings by the average student The perils of …

Understanding And Attitudes Derived From The Use Of Animals In Schools, Peter J. Kelly

Education Collection

A general review of the variety of activities involving the direct use of animals which are undertaken in secondary schools. An assessment is made of their value (positive and negative) in terms of knowledge and attitudes (including ethics) which are, or might be, derived from them. Alternative methods also are reviewed with an assessment of their value in relation to live animal studies.

Effects Of A Hepatic Toxin From The Cyanophyte, Microcystis Aeruginosa, Thomas Lee Foxall

Doctoral Dissertations

Toxic cyanobacteria bloom in eutrophic, freshwater lakes and ponds and may cause environmental, health and recreational problems during or after the massive growth of these microorganisms Microcystis aeruginosa is commonly involved in freshwater blooms and one of its toxins (microcystin) causes liver damage in birds and mammals. This study has determined the specific site of action of microcystin and characterized the hepatic damage at the ultrastructural level. Histological changes in centrilobular regions of liver tissue were noted after intraperitoneal administration in mice. Hepatic sinusoidal epithelial and hepatocyte plasma membranes ruptured with the release of cellular components that pooled with blood. …

The Biology Of Beggiatoa., William Roy Strohl

LSU Historical Dissertations and Theses

Part I. An accurate most-probable-number enumeration method was developed for counting the number of Beggiatoa trichomes from various freshwater sediments. The medium consisted of extracted hay, diluted soil extract, 0.05% sodium acetate, and 15-35 units per ml of catalase. The same enrichment medium, but without the acetate, was the best enrichment medium from which to obtain pure cultures. A total of thirty-two strains of Beggiatoa were isolated from seven different freshwater habitats and were separated into five groups based on several preliminary characteristics. Four of the groups contained cells with trichomes of approximately the same diameter (1.5-2.7 (mu)m) and may …

Genetic Variance, Heritability And Correlation For Genetic Characters Of The Sweet Potato, Ipomoea Batatas, L., Florencio Ando Saladaga

LSU Historical Dissertations and Theses

Polycross progeny tests and comparisons of advanced seedlings (cultivars) were conducted in 1978 and 1979 to determine the genetic variance, heritability and correlations of several characters in the sweet potato, Ipomoea batatas, L. In 1978, 41.8% of the 'L0-323' polycross seedling progeny had copper or rose skin colors and 2.4% had root yields higher than the highest yielding parent plants. In the 1979 polycross progeny test, estimates of heritability for root skin and flesh color were both very low. Root skin color was positively correlated with yield of US #1 roots, total yield of fleshy roots, vine length, and vine …

Ameson Michaelis (Microsporida) In The Blue Crab, Callinectes Sapidus: Altered Host Cell And Isolated Parasite Metabolism., Anna Marie Carmela Findley

LSU Historical Dissertations and Theses

The Microsporida are a large group of highly specialized obligate intracellular protozoan parasites. Despite their wide distribution in nature and their devastating effect on a variety of animal populations, relatively little is known about the physiological characteristics of these parasites.