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Ecological Consequences Of Variation In Pollinator Availability: Ocotillo, Carpenter Bees, And Hummingbirds In Two Deserts., Peter Evans Scott Jan 1989

Ecological Consequences Of Variation In Pollinator Availability: Ocotillo, Carpenter Bees, And Hummingbirds In Two Deserts., Peter Evans Scott

LSU Historical Dissertations and Theses

I studied the pollination ecology of a widespread desert shrub, ocotillo (Fouquieria splendens), and some of the consequences of geographic variation in availability of pollinators. I studied ocotillo in the Chihuahuan Desert of western Texas (Big Bend National Park) for three flowering seasons, and in the Sonoran Desert of southern California (Anza-Borrego Desert State Park) for parts of two flowering seasons. In both areas, ocotillo flowers profusely for one month each year, and requires outcross pollination to mature more than 5% of its potential seed crop. In Texas, carpenter bees (Xylocopa californica arizonensis) and their nest plants (species of Agave, …

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Rice Bran Stabilization By Improved Internal And External Heating Methods., Jiaxun Tao Jan 1989

Rice Bran Stabilization By Improved Internal And External Heating Methods., Jiaxun Tao

LSU Historical Dissertations and Theses

Rice bran stabilization was conducted by internal (microwave), external (oven drying and steam retorting) heating and non-heating ($\sp{60}$Co irradiation) treatments to improve currently used methods. Two commercial rice varieties cultivated in Louisiana, one long grain (Lemont) and a medium grain (Nato), were milled to collect bran samples. The bran was analyzed for its proximate composition and various physical and thermal characteristics. The proximate composition for long and medium grain bran, respectively, was: moisture, 11.2% and 10.8%; protein, 16.07% and 16.20%; fat, 19.20% and 21.97%; crude fiber, 8.49% and 8.41%; ash, 9.23% and 9.46%; and nitrogen-free extract, 47.01% and 44.07%. Physical …

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Avian Influenza Viruses In Coastal Louisiana Waterfowl: Host And Environmental Factors Affecting Prevalence And Viral Persistence., David Edward Stallknecht Jan 1989

Avian Influenza Viruses In Coastal Louisiana Waterfowl: Host And Environmental Factors Affecting Prevalence And Viral Persistence., David Edward Stallknecht

LSU Historical Dissertations and Theses

Cloacal and tracheal swabs were collected from 1,389 hunter-killed ducks in Cameron Parish, Louisiana during the 1986 and 1987 waterfowl seasons. These included 605 blue-winged teal (Anas discors), 75 mottled ducks (A. fulvigula), 375 gadwalls (A. strepera) and 334 green-winged teal (A. crecca). Twenty-eight avian influenza viruses (AIVs) were isolated. Prevalence estimates of AIV in ducks during September, November and December/January were 3.1%, 2.1%, and 0.4%, respectively. Differences in prevalence were detected by season ($P$ =.044) and age class ($P$ =.036). Two isolations from resident mottled ducks indicate local transmission of AIV on these wintering areas. Much subtype diversity was …

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Spectroscopic Studies Of Biological And Synthetic Tetranuclear Iron-Sulfur Clusters., Yvonne Amalia Onate Jan 1989

Spectroscopic Studies Of Biological And Synthetic Tetranuclear Iron-Sulfur Clusters., Yvonne Amalia Onate

LSU Historical Dissertations and Theses

Room-temperature UV-visible adsorption, low-temperature magnetic circular dichroism (MCD), electron paramagnetic resonance (EPR), and resonance Raman (RR) spectroscopies have been used to characterize the electronic, magnetic and structural properties of the (4Fe-4S) centers in Azotobacter vinelandii Fe proteins from Mo- and V-nitrogenases (Av2 and Av2$\sp\prime$, respectively), and Bacillus subtilis glutamine phosphoribosylpyrophosphate amidotransferase. These studies have characterized the S = 1/2 and S = 3/2 forms of the (4Fe-4S) $\sp{1+}$ cluster in native Av2 and Av2$\sp\prime$ in the presence and absence of the protein unfold agent urea, glassing solvents, such as ethylene glycol and glycerol, and nucleotides, such as ATP. The results …

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Phosphatidylethanolamine Synthesis By A Base Exchange Reaction In Castor Bean Endosperm., Sungho Shin Jan 1989

Phosphatidylethanolamine Synthesis By A Base Exchange Reaction In Castor Bean Endosperm., Sungho Shin

LSU Historical Dissertations and Theses

An ethanolamine base exchange enzyme has been assayed in the endoplasmic reticulum (ER) of castor bean (Ricinus communis L. var. Hale) endosperm. The activity was maximal at ethanolamine concentrations of 30 uM in the presence of 2 mM CaCl$\sb2$. The optimum pH was 7.8 using HEPES buffer. Under these conditions, the enzyme had a maximum enzyme velocity of approximately 0.3 nmol h$\sp{-1}$ mg$\sp{-1}$ protein and an apparent Km of 5.0 uM for ethanolamine. A maximum velocity of approximately 1.7 nmol h$\sp{-1}$ mg$\sp{-1}$ protein was obtained under similar conditions with L-serine at about 400 uM in a serine base exchange reaction. …

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The Evolution Of Igg And Igm Antibodies To Antigens Of Mycobacterium Leprae In Experimentally Inoculated Armadillos., Abdul Reza Vadiee Jan 1989

The Evolution Of Igg And Igm Antibodies To Antigens Of Mycobacterium Leprae In Experimentally Inoculated Armadillos., Abdul Reza Vadiee

LSU Historical Dissertations and Theses

The nine-banded armadillo (Dasypus novencinctus linn.) is highly susceptible to infection with M. leprae and has become an important animal model in the study of leprosy. In an attempt to define the major immunogens of M. leprae and the isotypic antibody response to these molecules during infection, the IgG and IgM antibody responses of experimentally-infected armadillos to the sonicated M. leprae, supernatant fraction of sonicated M. leprae, lipoarabinomannan derived from M. tuberculosis, and phenolic glycoliopid-I was analyzed using immunoblot and ELISA. Antibodies to the specific epitope (defined by monoclonal antibody IIIE9) on the 65-kDa protein of M. leprae were analyzed …

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Evaluation Of Fish Meal Supplement On Physiological Response And Milking Performance In Lactating Dairy Cattle Under Heat Stress., George Mark Toups Jan 1989

Evaluation Of Fish Meal Supplement On Physiological Response And Milking Performance In Lactating Dairy Cattle Under Heat Stress., George Mark Toups

LSU Historical Dissertations and Theses

Twenty-four mid-lactation heat stressed dairy cows were paired in a completely randomized block design on basis of breed, age, lactation number, calving date, previous mild production and milk fat content in order to evaluate experimental responses. Test treatment was a 50:50 dry matter (DM) corn silage-concentrate diet supplemented with 4.75% DM specially-selected fish meal (FM). Animals were housed under natural summer conditions for the duration of a 70-d experimental period, commencing in mid-June. Low roughage diets were slightly below NRC requirements for both energy and crude protein. DM intake, milk fat content, and milk fat:milk lactose ratio were statistically significant, …

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Studies On Trypanosoma Cruzi Isolates From Louisiana Mammals With Particular Reference To Infectivity To Dogs., Stephen Charles Barr Jan 1989

Studies On Trypanosoma Cruzi Isolates From Louisiana Mammals With Particular Reference To Infectivity To Dogs., Stephen Charles Barr

LSU Historical Dissertations and Theses

This dissertation describes studies on three Trypanosoma cruzi isolates from Louisiana mammals with particular reference to infectivity to dogs. Isolates from an opossum (Tc-O) and armadillo (Tc-A) were obtained during a blood culture survey of these animal populations in Louisiana. Prevalence of T. cruzi were 37.5% and 1% in opossums and armadillos respectively. Further, 48% opossums had myocarditis suggestive of T. cruzi infection. Rural dogs with known contact with T. cruzi hosts, housed rural dogs, urban animal shelter dogs and household pets showed 4.7, 0, 2.3 and 0% serological prevalence to T. cruzi respectively. Tc-O and Tc-A (wild isolates) displayed …

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Ostertagia Ostertagi: Population Dynamics Under Pasture And Confinement Conditions With Particular Reference To The Inhibition Phenomenon., Carlos Solomon Eddi Jan 1989

Ostertagia Ostertagi: Population Dynamics Under Pasture And Confinement Conditions With Particular Reference To The Inhibition Phenomenon., Carlos Solomon Eddi

LSU Historical Dissertations and Theses

This experiment was conducted to further define epidemiological events involved in the induction, duration and maturation phases of inhibited development of Ostertagia ostertagi in naturally infected calves and to characterize some aspects of the immune response associated with the inhibition phenomenon. During March, April and May 1988, 3 groups of 18 calves were grazed on the same experimental pasture for 3 weeks. At the end of each grazing period, 2 calves of each group were slaughtered for analysis of worm population; the remaining calves were divided into 2 subgroups of 8 calves. One subgroup was returned to pasture while the …

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A Program Visualization System That Supports The Program Understanding Process., Brady R. Rimes Jan 1989

A Program Visualization System That Supports The Program Understanding Process., Brady R. Rimes

LSU Historical Dissertations and Theses

The goal of this research is to provide a graphical system that supports the program understanding process by representing the program's control flow, the code and the identifiers local to a specific point within the program. By having more information local to the point of interest, the programmer can maintain continuity in developing program understanding. The programmer can see loops, procedure calls, and other structures with respect to their execution order and can view them in the environment or the context in which they will execute. The Peec system supplies a graphical representation of the program's control flow in which …

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Robert Floyd Kennon: Reform Governor., Doris Dorcas Carter Jan 1989

Robert Floyd Kennon: Reform Governor., Doris Dorcas Carter

LSU Historical Dissertations and Theses

This dissertation is a study of Robert Floyd Kennon, reform governor of Louisiana, from 1952-1956. Kennon was born on August 21, 1902, near Minden, Louisiana. He received his bachelor's degrees from Louisiana State University in Baton Rouge in Liberal Arts and Law in 1923 and 1925, respectively. In 1925, he began the practice of law in Minden, and was elected as mayor of the town at age twenty-three. Five years later, he sought and won, the office of District Attorney, for the Twenty-Sixth Judicial District, a position he held for ten years. He was a staff officer in Europe during …

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Toward The Inclusion Of Environmental Factors In The Concept And Measure Of National Income., George Edward Foy Jr Jan 1989

Toward The Inclusion Of Environmental Factors In The Concept And Measure Of National Income., George Edward Foy Jr

LSU Historical Dissertations and Theses

This dissertation uses Sir John Hicks' concept of income as a guide to integrate environmental factors into the concept and measure of national income. Chapter 1 introduces Hicks' concept of income as the maximum amount which one can consume in a given period and still be as well off at the end of the period as he was at the beginning. This basic idea of sustainability requires accounting for the net depletion of all capital consumed in current production. Chapter 2 documents recent trends in natural resource use to demonstrate that exclusion of the depreciation of environmental capital from NNP …

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Floral Ontogeny Of Mimosoid Legumes., Jose Israel Ramirez-Domenech Jan 1989

Floral Ontogeny Of Mimosoid Legumes., Jose Israel Ramirez-Domenech

LSU Historical Dissertations and Theses

Comparative floral ontogeny in mimosoid legumes was analyzed among representative genera in three major tribes Mimoseae, Acacieae and Ingeae. Details on floral and inflorescence ontogeny in one mimosoid species is described and illustrated for Mimosa strigillosa Torr. & Gray. Three features studied developmentally include: variation in number of parts, patterns of arrangement and inflorescence architecture. Suppression occurs along inflorescences that develop synchronously, when basal flowers are retarded. Tetramerous flowers are considered a reduction or suppression from basic pentamerous flower. Divergent patterns in order of sepal initiation and stamen initiation and proliferation are found during early ontogeny. Four patterns found in …

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A Thematic Index Of The Works For Woodwinds By Eugene Bozza (B. 1905)., Lois Jeanne Kuyper-Rushing Jan 1989

A Thematic Index Of The Works For Woodwinds By Eugene Bozza (B. 1905)., Lois Jeanne Kuyper-Rushing

LSU Historical Dissertations and Theses

The introduction to this thematic index deals with the life of Eugene Bozza. Bozza studied at the Paris Conservatory three times for three separate awards. In 1924 he graduated with the first prize in violin. In 1931 he was awarded the first prize in conducting and in 1934 he won the first prize in composition and the Premier Grand Prix de Rome. Bozza's professional career included five years as solo violinist with L'Orchestre de Pasdeloup (1925-30), one year as conductor of the Ballet Russe de Monte Carlo (1931-32), eleven years as Chef d'Orchestre at the Opera Comique (1939-1950) and twenty-five …

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Pro Bono Publico: New Orleans Politics And Municipal Reform In The Progressive Era, 1912-1926. (Volumes I And Ii)., Terrence Walter Fitzmorris Jan 1989

Pro Bono Publico: New Orleans Politics And Municipal Reform In The Progressive Era, 1912-1926. (Volumes I And Ii)., Terrence Walter Fitzmorris

LSU Historical Dissertations and Theses

Social prejudice and moral consideration did not form the basis of city politics and municipal reform in New Orleans during the Progressive Era. The Regular Democratic Organization, the so-called political machine and the civic reformers of New Orleans were more concerned with issues of expanding and centralized municipal authority, regulation of private and public corporations, completion and expansion of public services, "living wages" and decent working conditions for organized labor, equitable taxation and assessment rates for property holders, and city planning and development. Admittedly, the principal leadership of the municipal reform movement came from the "upper crust" of New Orleans …

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Characterization Of The Transcriptional Properties Of Equine Infectious Anemia Virus., Siyamak Rasty Jan 1989

Characterization Of The Transcriptional Properties Of Equine Infectious Anemia Virus., Siyamak Rasty

LSU Historical Dissertations and Theses

The transcriptional properties of equine infectious anemia virus were examined in two distinct equine cell lines in which the virus establishes either a persistent or a cytopathic infection. Northern hybridization analyses were performed to determine the number, sizes, and relative levels of the EIAV transcripts encoded during persistent or cytopathic infections. Three species of viral mRNA were detected in infected cells: an 8.2-kb full-length genomic mRNA, a 3.5-kb single-spliced mRNA, and a low abundance 1.5-kb mRNA, presumably formed by a double-splicing event of the full-length mRNA. Analysis of the levels of EIAV-specific RNA's present during persistent and cytopathic infections has …

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Behavior Of The American Alligator In A Louisiana Freshwater Marsh., William Lee Rootes Jan 1989

Behavior Of The American Alligator In A Louisiana Freshwater Marsh., William Lee Rootes

LSU Historical Dissertations and Theses

Stomachs from 706 alligators (Alligator mississippiensis) harvested from a southern Louisiana fresh marsh in 1987 and 1988 were examined for web tags from smaller marked alligators. Alligators $$2.73 m TL) were significantly more cannibalistic than smaller alligators (P $<$ 0.0001). Males and females were cannibalized in the same proportion they occurred in the population. Cannibalism mortality appeared to be distributed proportionately among all cohorts in the 0.35-2.12 m TL size classes resulting in a relatively uniform reduction across the group. Cannibalism was found to be an important population regulating mechanism, accounting for an estimated 50.2% of total hatchling mortality and 70.1% of total mortality in age 11 months and older alligators. Male growth rates in both a palustrine marsh (Lacassine National Wildlife Refuge) and estuarine marsh (Rockefeller Refuge) marsh types were greater than female rates (P $<$ 0.0001). Growth rates and weight-length ratios of alligators in estuarine marsh were greater than those of alligators in palustrine marsh (P $<$ 0.0001). Age specific fecundity and survivorship rates of alligators in the palustrine marsh were less than alligators in the estuarine marsh. The home range size and activity pattern of adult female alligators of different reproductive status were compared among seasons of the year. Home range size (P = 0.54) and minimum average daily movement rates (P = 0.85) did not differ between nesting and non-nesting radio-collared females during the summer nesting season. No difference was found between females with and without broods in the two variables during the fall brooding season. Adult radio-collared female alligators ranged over larger areas and had greater daily average daily movement rates during the spring breeding season than during any other season of the year (P $<$ 0.01). Annual home range size of the 15 adult female alligators monitored during the study was 36.2 $\pm$ 42.6 (SD) ha.

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An Instructional Sequence In Music Education Using Vocal And Instrumental Music Of Five World Cultures., Sophronia Lois Thomas Jan 1989

An Instructional Sequence In Music Education Using Vocal And Instrumental Music Of Five World Cultures., Sophronia Lois Thomas

LSU Historical Dissertations and Theses

The music of five non-Western cultures was incorporated in an instructional sequence for elementary grades (K)1-6. Traditional music of the Australian Aborigines and the Akan and Ewe tribes of Ghana, classical music of India, the music of the Indonesian gamelan, and Gagaku music of Japan were examined for the presence of musical concepts, the way each culture handles the concepts that are present, and the interrelationships that exist among the concepts. The music is described in terms of the musical concepts of dynamics, timbre, texture, rhythm, melody, harmony, and form. All of the concepts and their related percepts are organized …

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Model-Based Three-Dimensional Object Recognition And Localization Using Properties Of Surface Curvatures., Wu Wang Jan 1989

Model-Based Three-Dimensional Object Recognition And Localization Using Properties Of Surface Curvatures., Wu Wang

LSU Historical Dissertations and Theses

The ability to recognize three-dimensional (3-D) objects accurately from range images is a fundamental goal of vision in robotics. This facility is important in automated manufacturing environments in industry. In contrast to the extensive work done in computer-aided design and manufacturing (CAD/CAM), the robotic process is primitive and ad hoc. This thesis defines and investigates a fundamental problem in robot vision systems: recognizing and localizing multiple free-form 3-D objects in range images. An effective and efficient approach is developed and implemented as a system Free-form Object Recognition and Localization (FORL). The technique used for surface characterization is surface curvatures derived …

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Age And Growth Of Red Drum, Sciaenops Ocellatus, And Black Drum, Pogonias Cromis, In The Northern Gulf Of Mexico., Daniel William Beckman Jan 1989

Age And Growth Of Red Drum, Sciaenops Ocellatus, And Black Drum, Pogonias Cromis, In The Northern Gulf Of Mexico., Daniel William Beckman

LSU Historical Dissertations and Theses

The objectives of this study were to obtain age estimates and describe growth for the two sciaenid fish species, red drum Sciaenops ocellatus and black drum Pogonias cromis, in the northern Gulf of Mexico. Age estimates were made using annulus counts in transverse sections of otoliths (inner ear bones). Aging techniques were validated for juvenile red drum by imparting oxytetracycline into otoliths as a time marker. Recaptures validated that annuli were deposited in otoliths yearly up to 2.5 years age, with the first annulus formed in the second winter at 1-1.5 years age. Age estimates for remaining age classes of …

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Orchestral Snare Drum Performance: An Historical Study., Guy Gregoire Gauthreaux Ii Jan 1989

Orchestral Snare Drum Performance: An Historical Study., Guy Gregoire Gauthreaux Ii

LSU Historical Dissertations and Theses

Today, we differentiate snare drum performance into one of two broad styles, usually referred to as orchestral and rudimental. Since all early examples of orchestral snare drum literature are rudimental or military in nature, the evolution of present-day orchestral snare drum performance from its military origin deserves careful study. The objectives of this monograph were to investigate: the function of the snare drum prior to its use in the orchestra, the origins of the use of the snare drum in the orchestra, and the developments of orchestral snare drum performance practice. This study concluded that the movement of the snare …

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In Vitro Screening Of Easter Lily (Lilium Longiflorum Thunb) For Resistance To Stem Rot Caused By Phytophthora Cactorum., Ola Abdel-Aziz Elshennawy Jan 1989

In Vitro Screening Of Easter Lily (Lilium Longiflorum Thunb) For Resistance To Stem Rot Caused By Phytophthora Cactorum., Ola Abdel-Aziz Elshennawy

LSU Historical Dissertations and Theses

Callus cultures were initiated using 0.5 cm bulb scale segments of Easter lily (Lilium longiflorum Thunb) cultured on a medium designated CI-1, which contained (per liter), 4.3 g Murashige and Skoog basal salts, 30 g sucrose, 8 g agar, 0.4 mg Thiamine, 100 mg myo-inositol, 2.5 mg 1-naphthaleneacetic acid (NAA) and 0.1 mg N-(phenyl-methyl)-1-H-purine-6-amine (BA). Calli derived from 3 cultivars of Easter lily, 'Ace', 'Harson' and 'Nellie White', susceptible to the fungus Phytophthora cactorum, were irradiated with UV light (25 erg mm$\sp{-2}$ s$\sp{-1}$) for 0-28 days at 4 day intervals. The calli were then subcultured for 4 weeks on CI-1 …

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Re-Inventing The Public Sphere: Critical Theory, Social Responsibility, Schools, And The Press., John Pace Konopak Jan 1989

Re-Inventing The Public Sphere: Critical Theory, Social Responsibility, Schools, And The Press., John Pace Konopak

LSU Historical Dissertations and Theses

This study examines the contemporary discourses of journalism and pedagogy from the standpoint of critical theory to assess the impact of technocratic rationality and instrumental logic on the practices of communication and education. It is premised on the observation that, spurred by the imperatives of trans-national capital accumulation, privatization inimical to democratic interests has begun to colonize public education. The study represents an effort to reactivate a concept and rhetoric of "social responsibility" that would animate a project of reclaiming cultural space to be occupied by a "public sphere," in a struggle analagous to that waged against feudalism and monarchical …

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The Development Of A Fetal Uterine Cell In Vitro Coculture System For Mammalian Embryos., Klaus Enrique Wiemer Jan 1989

The Development Of A Fetal Uterine Cell In Vitro Coculture System For Mammalian Embryos., Klaus Enrique Wiemer

LSU Historical Dissertations and Theses

In Experiment I, 125 two-pronuclear murine ova were cultured in either Ham's F-10 plus l5% human serum (HF-10h), on a monolayer of human uterine fibroblasts (HUC) or fetal bovine uterine fibroblasts (FBUC). After 96 hours in culture, 2.4% embryos in HF-10h were viable compared with 45.2% and 61% for embryos on HUC and FBUC, respectively. Results suggest that monolayers were advantageous to medium alone for culturing murine embryos. Experiment II was conducted to assess the development of 117 bovine embryos in HF-10 (Treatment A), on a monolayer of FBUC (Treatment B) or hormone-pretreated FBUC (Treatment C). Embryo viability assessed at …

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Studies On The Agrobacterium Mediated Transformation Of Potato (Solanum Tuberosum L.) And Tobacco (Nicotiana Tabacum L.) With Antibacterial And High Essential Amino Acids Encoding Genes., Mehmet Selim Cetiner Jan 1989

Studies On The Agrobacterium Mediated Transformation Of Potato (Solanum Tuberosum L.) And Tobacco (Nicotiana Tabacum L.) With Antibacterial And High Essential Amino Acids Encoding Genes., Mehmet Selim Cetiner

LSU Historical Dissertations and Theses

Tuber disks from four cultivars of Solanum tuberosum L. were cultured on a Murashige and Skoog medium supplemented with B5 vitamins, 3.0% sucrose, 0.7% phytagar and ratios of indole-3-actyl-aspartic acid (IAAa) and zeatin riboside (ZR). No shoots were regenerated from Red LaSoda. Russet Burbank, Desiree, and LaBelle tuber disks produced shoots over a range of IAAa and ZR ratios. The greatest number of shoots was regenerated from Russet Burbank at 1 $\mu$M IAAa and 8 $\mu$M ZR. Different potato cultivars were also tested for their responses to Agrobacterium infections. Growth stage of the bacterial cultures and exposure duration of tuber …

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Feeding And Foraging Behaviors Of Subterranean Termites (Isoptera:Rhinotermitidae)., Keith Scott Delaplane Jan 1989

Feeding And Foraging Behaviors Of Subterranean Termites (Isoptera:Rhinotermitidae)., Keith Scott Delaplane

LSU Historical Dissertations and Theses

Six studies were done on feeding and foraging behaviors of three species of subterranean termites, Coptotermes formosanus Shiraki, Reticulitermes flavipes (Kollar), and R. virginicus (Banks) (Isoptera: Rhinotermitidae). When presented with four equal wood blocks, C. formosanus did not forage randomly but concentrated on a few preferred blocks. When R. flavipes and C. formosanus were each placed in foraging arenas with linear, successive wood blocks, C. formosanus consumed a greater percentage dry mass of a wood block before moving to the next block (10.3%) than did R. flavipes (4.2%). Groups of C. formosanus were offered wood blocks that differed in initial …

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Toxicity Of Permethrin To Procambarus Clarkii, And The Effects Of Permethrin-Induced Density Reduction And Supplemental Feeding On Stunted Crawfish Populations., Herman Henry Jarboe Jan 1989

Toxicity Of Permethrin To Procambarus Clarkii, And The Effects Of Permethrin-Induced Density Reduction And Supplemental Feeding On Stunted Crawfish Populations., Herman Henry Jarboe

LSU Historical Dissertations and Theses

The acute toxicity of permethrin to red swamp crawfish (Procambarus clarkii) was evaluated in laboratory studies. The mean static acute 96-h LC50 of permethrin to red swamp crawfish 8-12 mm (0.017 g), 25-35 mm (0.64 g), 45-55 mm (2.45 g), and 65-75 mm total length (TL) (8.98 g) was 0.44, 0.85, 1.30, and 0.81 $\mu$g/L, respectively. Permethrin toxicity did not differ among immature male, mature male and female P. clarkii. Crawfish surviving permethrin exposure exhibited no differences in post-exposure growth, survival, maturity attainment, or the production of viable young when compared to non-exposed controls (P $>$ 0.2). At the …

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Molecular Characterization Of Fall Armyworm Mitochondrial-Dna (Spodoptera Frugiperda (J. E. Smith);)., Li Dao Ke Jan 1989

Molecular Characterization Of Fall Armyworm Mitochondrial-Dna (Spodoptera Frugiperda (J. E. Smith);)., Li Dao Ke

LSU Historical Dissertations and Theses

Chapter I. Mitochondrial DNA (mtDNA) was isolated, purified from pooled samples of fall armyworm (FAW), Spodoptera frugiperda, and characterized. The yield of mtDNA from adults ranged from 45 to 114 ng per moth. Entire mtDNA from adult FAW showed 1 to 3 electrophoretic bands when electrophoresed on agarose gels. When digested with SalI or XhoI restriction endonucleases, all DNA forms co-migrated as single bands with the same mobility. XbaI cleaved the mtDNA into three fragments of 8083 $\pm$ 524, 6179 $\pm$ 430, and 1990 $\pm$ 140 base pairs (bp). The FAW mitochondrial genome size was calculated to be 16,253 $\pm$ …

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From Forest, Stream, And Sea: Aspects Of Self-Sufficiency In The Nineteenth Century Louisiana Diet. (Volumes I And Ii)., James Patrick Whelan Jr Jan 1989

From Forest, Stream, And Sea: Aspects Of Self-Sufficiency In The Nineteenth Century Louisiana Diet. (Volumes I And Ii)., James Patrick Whelan Jr

LSU Historical Dissertations and Theses

Studies of foodstuff self-sufficiency in the antebellum South have shown that during the middle third of the nineteenth century, as represented by the census years 1840, 1850 and 1860, certain regions of Louisiana suffered from meat production deficits. It has been assumed by most interested scholars that these deficits were overcome by importing pork and beef from the midwest or Upper South. Other possible sources of meat supplements that have not been generally considered are the wild game and fishery resources of the state. Hunting and fishing have long traditions as important activities in the South in general and in …

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Models And Tests In Functional Morphology: The Significance Of Description And Integration, Dominique G. Homberger Dec 1988

Models And Tests In Functional Morphology: The Significance Of Description And Integration, Dominique G. Homberger

Faculty Publications

SYNOPSIS: Functional-anatomical work on complex structural systems is handicapped by several difficulties: (1) Lack of established guidelines on how to select the structures that are relevant for the intended study, (2) lack of methods to check the accuracy of the description of a system's morphology, and (3) the need to integrate a large mass of results obtained through a variety of approaches taken from different disciplines, such as anatomy, physiology, physics, biochemistry, ecology and evolutionary biology. Suggestions to alleviate some of the problems include (1) to use information on the physiological and physical properties of the tissues in a system …

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