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Louisiana Agriculture Winter, 2001, Lsu Agcenter Jan 2001

Louisiana Agriculture Winter, 2001, Lsu Agcenter

Louisiana Agriculture

No abstract provided.

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The Genetics Of Reproductive Isolation And The Potential For Gene Exchange Between Drosophila Pseudoobscura And D. Persimilis Via Backcross Hybrid Males, Mohamed A.F. Noor, Katherine L. Grams, Lisa A. Bertucci, Yvette Almendarez, Jane Reiland, Kelley R. Smith Jan 2001

The Genetics Of Reproductive Isolation And The Potential For Gene Exchange Between Drosophila Pseudoobscura And D. Persimilis Via Backcross Hybrid Males, Mohamed A.F. Noor, Katherine L. Grams, Lisa A. Bertucci, Yvette Almendarez, Jane Reiland, Kelley R. Smith

Faculty Publications

Hybrid male sterility, hybrid inviability, sexual isolation, and a hybrid male courtship dysfunction reproductively isolate Drosophila pseudoobscura and D. persimilis. Previous studies of the genetic bases of these isolating mechanisms have yielded only limited information about how much and what areas of the genome are susceptible to interspecies introgression. We have examined the genetic basis of these barriers to gene exchange in several thousand backcross hybrid male progeny of these species using 14 codominant molecular genetic markers spanning the five chromosomes of these species, focusing particularly on the autosomes. Hybrid male sterility, hybrid inviability, and the hybrid male courtship dysfunction …

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Estimating The Unbiased Estimator Θ For Population Genetic Survey Data, Jacqueline J. Weicker, Robb T. Brumfield, Kevin Winker Jan 2001

Estimating The Unbiased Estimator Θ For Population Genetic Survey Data, Jacqueline J. Weicker, Robb T. Brumfield, Kevin Winker

Faculty Publications

We consider a method of approximating Weir and Cockerham's θ, an unbiased estimator of genetic population structure, using values readily available from published studies using biased estimators (Wright's FST or Nei's GST). The estimation algorithm is shown to be useful for both model populations and real-world avian populations. However, the correlation between Wright's FST and Weir and Cockerham's θ is strong when compared among 39 empirical avian datasets. Thus, the advantage of approximating an unbiased estimator is unclear considering the small actual effect of θ's bias-removing power on empirical datasets.

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Sexual Selection On Plumage And Behavior In An Avian Hybrid Zone: Experimental Tests Of Male-Male Interactions, David B. Mcdonald, Robert P. Clay, Robb T. Brumfield, Michael J. Braun Jan 2001

Sexual Selection On Plumage And Behavior In An Avian Hybrid Zone: Experimental Tests Of Male-Male Interactions, David B. Mcdonald, Robert P. Clay, Robb T. Brumfield, Michael J. Braun

Faculty Publications

In western Panama, an unusual hybrid zone exists between white-collared manakins, Manacus candei, and golden-collared manakins, M. vitellinus. Unidirectional introgression of plumage traits from vitellinus into candei has created a region in which all definitively plumaged males have a collar that is lemon-colored. These males are nearly indistinguishable from white-collared candei genetically and morphometrically, but strongly resemble golden-collared vitellinus due to the introgression of secondary sexual plumage traits, particularly the lemon-colored collar. The introgression could be explained by sexual selection for golden-collared traits or by a series of mechanisms that do not invoke sexual selection (e.g., neutral diffusion, dominant allele). …

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Effect Of Sweetpotato Genotype, Storage Time And Production Site On Feeding And Oviposition Behavior Of The Sweetpotato Weevil, Cylas Formicarius (Coleoptera: Apoinidae), L. Mao, R. N. Story, A. M. Hammond, D. R. Labonte Jan 2001

Effect Of Sweetpotato Genotype, Storage Time And Production Site On Feeding And Oviposition Behavior Of The Sweetpotato Weevil, Cylas Formicarius (Coleoptera: Apoinidae), L. Mao, R. N. Story, A. M. Hammond, D. R. Labonte

Faculty Publications

The effect of sweetpotato genotype, storage time and production site on Cylas formicarius (Fab.) feeding and oviposition was investigated. Sweetpotato genotype had a significant effect on feeding and oviposition rates in both no-choice and choice arenas. Beauregard and Centennial were uniformly susceptible across all age groups. W-250 had the least number of feeding punctures and eggs at 7 and 25 days after harvest. At 85 days after harvest, W-244 had the least number of feeding punctures and eggs, while W-250 was not significantly different from Beauregard and Centennial. Roots of the same genotype grown in different locations differed in the …

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The Asymptotic Equivalence Of The Fisher Information Matrices For Type I And Type Ii Censored Data From Location-Scale Families, Luis A. Escobar, William Q. Meeker Jan 2001

The Asymptotic Equivalence Of The Fisher Information Matrices For Type I And Type Ii Censored Data From Location-Scale Families, Luis A. Escobar, William Q. Meeker

Faculty Publications

Type I and Type II censored data arise frequently in controlled laboratory studies concerning time to a particular event (e.g., death of an animal or failure of a physical device). Log-location-scale distributions (e.g., Weibull, log-normal, and loglogistic) are commonly used to model the resulting data. Maximum likelihood (ML) is generally used to obtain parameter estimates when the data are censored. The Fisher information matrix can be used to obtain large-sample approximate variances and covariances of the ML estimates or to estimate these variances and covariances from data. The derivations of the Fisher information matrix proceed differently for Type I (time …

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Lsu General Catalog 2001-2002, Louisiana State University And Agricultural And Mechanical College Jan 2001

Lsu General Catalog 2001-2002, Louisiana State University And Agricultural And Mechanical College

LSU General Catalog

The LSU General Catalog describes all undergraduate and graduate departments and programs with degree requirements and courses offered for each one. The General Catalog includes information on registration and financial aid as well as academic services offered to all students.

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The Aesthetics Of Terror Burke's Sublime And Helen Maria Williams's Visions Of Anti-Eden, Jack Fruchtman Jan 2001

The Aesthetics Of Terror Burke's Sublime And Helen Maria Williams's Visions Of Anti-Eden, Jack Fruchtman

1650-1850: Ideas, Aesthetics, and Inquiries in the Early Modern Era

No abstract provided.

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Intermediality And The "Necessary Connection" In Fuseli's Remarks On The Writing And Conduct Of J. J. Rousseau, Steven Raynie Jan 2001

Intermediality And The "Necessary Connection" In Fuseli's Remarks On The Writing And Conduct Of J. J. Rousseau, Steven Raynie

1650-1850: Ideas, Aesthetics, and Inquiries in the Early Modern Era

No abstract provided.

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The Law, Confinement, And Disruptive Excess In Hays's The Victim Of Prejudice, Sandra Sherman Jan 2001

The Law, Confinement, And Disruptive Excess In Hays's The Victim Of Prejudice, Sandra Sherman

1650-1850: Ideas, Aesthetics, and Inquiries in the Early Modern Era

No abstract provided.

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Foliation Jokes In Tristram Shandy, Diana Patterson Jan 2001

Foliation Jokes In Tristram Shandy, Diana Patterson

1650-1850: Ideas, Aesthetics, and Inquiries in the Early Modern Era

No abstract provided.

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Greeks, Indians, And The Scotticsh Presbyterian Dissident Arguments For Vegetarianism In Enlightenment Scotland, David Allen Jan 2001

Greeks, Indians, And The Scotticsh Presbyterian Dissident Arguments For Vegetarianism In Enlightenment Scotland, David Allen

1650-1850: Ideas, Aesthetics, and Inquiries in the Early Modern Era

No abstract provided.

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An Essay Suggesting An Important Application Of The Highland Music Moral Sentiment And The Ceconomic Ode, Leslie E. Brown Jan 2001

An Essay Suggesting An Important Application Of The Highland Music Moral Sentiment And The Ceconomic Ode, Leslie E. Brown

1650-1850: Ideas, Aesthetics, and Inquiries in the Early Modern Era

No abstract provided.

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Differential Detection Of Bartonella Species And Strains In Cat Scratch Disease Diagnostics By Polymerase Chain Reaction Amplification Of 16s Ribosomal Rna Gene, Ronald A. Tapp, Alma F. Roy, Richard E. Corstvet, Vincent L. Wilson Jan 2001

Differential Detection Of Bartonella Species And Strains In Cat Scratch Disease Diagnostics By Polymerase Chain Reaction Amplification Of 16s Ribosomal Rna Gene, Ronald A. Tapp, Alma F. Roy, Richard E. Corstvet, Vincent L. Wilson

Faculty Publications

Cat scratch disease (CSD) has been difficult to diagnose in animals because of the protracted clinical course of infection and the quiescent phases when the microbial culprit lies dormant. The causative agent in CSD appears to be multiple species and strains of Bartonella. Using polymerase chain reaction (PCR) techniques for amplification of highly variable regions of the 16S ribosomal RNA (rRNA) gene sequence, a very sensitive species- and strain-specific assay for CSD-causing Bartonella species was developed. PCR primers were designed to specifically amplify the 16S rRNA gene of Bartonella species but not of other microbial pathogens. This initial PCR was …

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Effects Of The High -Probability Sequence With And Without Extinction In Children With Feeding Disorders., Jennifer Eileen Dawson Jan 2001

Effects Of The High -Probability Sequence With And Without Extinction In Children With Feeding Disorders., Jennifer Eileen Dawson

LSU Historical Dissertations and Theses

The effects of the high-probability instructional sequence, with and without extinction, on increasing compliance to eat in three children with severe food refusal and selectivity were evaluated. Pediatric feeding disorders, in which children refuse most or all food and drink, are a rare and life threatening problem that requires intensive treatment. The majority of behavioral techniques used with feeding disordered children manipulate the consequence of food refusal. The use of antecedent procedures in the treatment of food refusal has been limited. One antecedent technique, the high-probability instructional sequence, involves first presenting the individual with a series of instructions that he/she …

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Developing Consensus Indicators Of Sustainability For Southeastern United States Aquaculture, Rex H. Caffey Jan 2001

Developing Consensus Indicators Of Sustainability For Southeastern United States Aquaculture, Rex H. Caffey

LSU Agricultural Experiment Station Reports

No abstract provided.

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Survival Of Canine Epididymal Sperm Under Cooled And Frozen-Thawed Conditions, Karla Stilley Jan 2001

Survival Of Canine Epididymal Sperm Under Cooled And Frozen-Thawed Conditions, Karla Stilley

LSU Master's Theses

The objective of the first experiment was to determine the effects of storage at 22„aC vs. 4„aC on the motility and percentage of membrane-intact sperm (%MIS) of epididymal mouse sperm. Testicles were allocated into 22„aC or 4„aC treatment groups and stored for 24 or 48 hours. Additional testicles were allocated into the 4„aC treatment for storage for 72 or 96 hours. Sperm was collected and analyzed at each time point. Storage at 22„aC lowered motility and %MIS (P<0.05) when compared with control sperm and 4„aC sperm at both the 24 and 48 hours. Motility and %MIS of 4„aC sperm did not decrease when compared with the control until after 72 hours of storage. The second experiment evaluated the effects of 22„aC vs. 4„aC storage for 24 and 48 hours on epididymal dog sperm. Motility and %MIS of the 22„aC sperm was lower than that of the 4„aC sperm and the control (P<0.05) at 24 and 48 hours. Motility of the 4„aC sperm was lower than the control at 24 and 48 hours (P<0.05), however %MIS was not lower than the control until 48 hours. The third experiment tested the effect of cryopreservation on epididymal dog sperm. Sperm was frozen immediately (A), after 48 hours at 4„aC in liquid (B) or after 48 hours at 4„aC of the whole testicle (C). Both pre-freeze (PF) and post-thaw (PT) motility and %MIS of B and C were lower than A (P<0.05). PT values were lower than PF values in all treatments (P<0.05). PT motility of B was lower than C (0 vs. 35.0¡Ó3.6%). Storage at 4„aC allows collection of motile epididymal mouse and dog sperm for several days after death. Dog testicles can be refrigerated for 2 days and epididymal sperm frozen with PT motility and %MIS of 35 and 62%.

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Near The Lewis & Clark Trail, Chad Colin Husted Jan 2001

Near The Lewis & Clark Trail, Chad Colin Husted

LSU Master's Theses

Near the Lewis & Clark Trail is a creative writing thesis that contains two distinct parts. Part one is a short story cycle: a collection of interlinked narratives that together, tell a larger, cohesive story. Many different points of view, narrative techniques, and non-linear time sequences are used in order to provide a pastiche of different voices, points in time, and perspectives, that ultimately form an overall narrative structure. In addition to the stories, there are several fictional documents that are used to separate the work at critical times, and to provide subtext. In between the stories are: a letter …

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A Performer's Guide To Theatrical Elements In Selected Trombone Literature, Cason Austin Duke Jan 2001

A Performer's Guide To Theatrical Elements In Selected Trombone Literature, Cason Austin Duke

LSU Major Papers

In the last forty years, many new solo and chamber pieces have been written for the trombone which involve elements of a theatrical nature, including lighting, make-up, costume, stage direction, dialogue/narration, sound effects, props, and audience interaction. It is difficult for a trombonist searching for music to discern a piece's theatrical nature by its listing in most catalogs. This document has attempted to solve that problem by gathering pieces that share these elements into an annotated collection. Nearly 200 pieces were discovered through contacts made with individual trombonists, composers, and publishers around the world. Of these, over sixty were acquired …

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Signs Sense: Exploring Signs In Urban Place Making, Amy Elizabeth Pecquet Jan 2001

Signs Sense: Exploring Signs In Urban Place Making, Amy Elizabeth Pecquet

LSU Master's Theses

Signs are prominent elements of the urban landscape; they display messages to the public, orient people in complex environments, act as social landmarks, and serve as a means of cultural expression. Despite the omnipresence of signs, designers have yet to capitalize on their potential urban spaces as creative design tools for enhancing a sense of place. Using literature and urban case studies, this thesis explores several quantitative methods to learn about effects produced by signs in the urban landscape. Case studies in New Orleans, Louisiana locate every sign in defined areas on Bourbon, Royal, and Canal Street to compare and …

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Microhabitat Use In An Assemblage Of Native And Introduced Stream Fishes In Wailoa Stream, Island Of Hawaii, Mark G. Mcrae Jan 2001

Microhabitat Use In An Assemblage Of Native And Introduced Stream Fishes In Wailoa Stream, Island Of Hawaii, Mark G. Mcrae

LSU Master's Theses

To date, most research on the ecology of Hawaiian stream fishes has taken place in the middle and upper reaches of streams. In the terminal reaches of streams in Hawaii, the ecological aspects of the relatively more diverse fish assemblages are largely unknown. This study investigated patterns of microhabitat use in an assemblage of native and introduced stream fishes living in the terminal reach of Wailoa Stream on the Island of Hawaii. Multivariate and univariate analyses of microhabitat data collected through underwater visual surveys indicated that differences in microhabitat preferences were an important factor in the structure of this assemblage. …

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Simulation Study And Instability Of Adaptive Control, Zhongshan Wu Jan 2001

Simulation Study And Instability Of Adaptive Control, Zhongshan Wu

LSU Master's Theses

The Minimum-degree Pole Placement algorithm for Self-tuning Regulator design and the Recursive Least-square method and the projection algorithm for plant estimation are studied first in this thesis. Simulation studies for the estimator and controller algorithms are mainly undertaken after describing how to use MATLAB S-function in detail. Not only do Simulation experiments illustrates how and how well the MDPP and RLS algorithms work, but also show how to write and debug MATLAB codes for S-function programs. The robustness of the adaptive control system is intensively discussed subsequently. By using an estimator resistant to the noise contamination, the adaptive control system …

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Plant Uptake Of Desorption Resistant Organic Chemicals From Sediments., Cesar Miguel Gomez Hermosillo Jan 2001

Plant Uptake Of Desorption Resistant Organic Chemicals From Sediments., Cesar Miguel Gomez Hermosillo

LSU Historical Dissertations and Theses

Two types of wetland plants, a woody species, black willow ( Salix nigra), and a non-woody, the macrophyte three-square bulrush (Scirpus olneyi), were used in laboratory studies to evaluate relationships between sorption, plant uptake, translocation and transpiration of phenanthrene, a model polycyclic aromatic hydrocarbon and chlorobenzene, a model chlorinated benzene from the reversible and desorption-resistant compartment of a sediment for Phenanthrene (PHEN) and a wetland soil for chlorobenzene (CB). The wetland soil is from The Petro Processors Inc. site (PPI), a 77-acre CERCLA facility located about 10 miles north of Baton Rouge, Louisiana. Other studies have evaluated the plant uptake …

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The Role Of Kernel Epicuticular Wax In Zea Mays Resistance To Aspergillus Flavus And Aflatoxin Production., You-Keng Goh Jan 2001

The Role Of Kernel Epicuticular Wax In Zea Mays Resistance To Aspergillus Flavus And Aflatoxin Production., You-Keng Goh

LSU Historical Dissertations and Theses

The physical and chemical roles of Zea mays (corn) kernel epicuticular wax in conferring resistance to aflatoxin production were examined. There was no evidence of a correlation between the amount of epicuticular wax and aflatoxin production in a kernel development experiment. Aflatoxin levels decreased as kernels developed. Epicuticular wax removal reduced aflatoxin at the earlier stages of development but increased aflatoxin in some genotypes at the later stages, indicating the importance of epicuticular wax during late-stage development and hinting of different defense mechanisms between the early- and late-stage kernels. The amount of epicuticular wax from mature kernels of 23 commercial …

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Investigation Of Amphoteric Materials For Treatment Of Heavy Metals In Storm Water., Dingfang Liu Jan 2001

Investigation Of Amphoteric Materials For Treatment Of Heavy Metals In Storm Water., Dingfang Liu

LSU Historical Dissertations and Theses

Urban storm water runoff mobilizes and transports significant loads of heavy metals. Promulgation of NPDES Phase II regulations has spurred development of Best Management Practices (BMPs) for in-situ control of heavy metals. In this study, Amphoteric materials such as manganese oxides and iron oxides on the various substrates including silica sands, polymeric beads and cementitious particles were investigated. Surface characterization results indicated that oxide coatings ranged from 20 to 200-mum in depth, and surface areas were significantly increased by greater than a factor of one thousand compared to uncoated media. Point of zero charge (PZC) for manganese oxide coated media …

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Embracing The Void: Nietzsche's "Zarathustra" And The Political., James Daniel Stewart Jan 2001

Embracing The Void: Nietzsche's "Zarathustra" And The Political., James Daniel Stewart

LSU Historical Dissertations and Theses

This dissertation explores Nietzsche's political theory through an analysis of his major work, Thus Spoke Zarathustra. It is demonstrated that the narrative structure of Zarathustra follows from a politically-grounded critique of collective human existence. Nietzsche critiques the state and mass society as inherently repressive. He critiques the concept of the community and friendship as producing ressentiment and bad conscience. One of the central metaphors in Zarathustra proves to be that of nausea, arising from contempt for the mediocre masses of humanity and the realization of the chaotic and contingent nature of existence. Through nausea, the individual necessarily becomes separated from …

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Wake Rites: The Ancient Irish Rituals Of "Finnegans Wake"., George Cinclair Gibson Jan 2001

Wake Rites: The Ancient Irish Rituals Of "Finnegans Wake"., George Cinclair Gibson

LSU Historical Dissertations and Theses

The complex of rites, rituals, and mythic reenactments known in Irish mythology as the Rites of Tara provides an interpretive model for James Joyce's Finnegans Wake. Using information and theories pertaining to the Rites of Tara obtained from sources used by James Joyce, a comparison of the Rites of Tara with Finnegans Wake reveals important correlates related to chronology, characters, architectonics, themes, and defining characteristics. The three separate chronological events presented by Wakean scholars as possible dates for the events in the Wake---Easter, an unnamed pagan festival, and the Vernal Equinox---converged on a single day at the Rites of Tara. …

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Epidemiology Of Salmonella In The Green Iguana (Iguana Iguana)., Mark Anthony Mitchell Jan 2001

Epidemiology Of Salmonella In The Green Iguana (Iguana Iguana)., Mark Anthony Mitchell

LSU Historical Dissertations and Theses

The incidence of iguana-associated salmonellosis reported in humans during the 1990's is a public health concern. This research is the first attempt to describe the epidemiology of Salmonella in the green iguana. Seasonal prevalence of Salmonella in green iguanas and their environment were estimated at a commercial iguana farm in El Salvador. The prevalence of Salmonella was lower in adult iguanas (44%) than in yearlings (50%) (Odds ratio (OR): 0.77, 95% Confidence Intervals (CI): 0.6--0.96) and higher in male iguanas (50%) than females (41%) (OR: 1.5, 95% CI: 1.2--1.8). Salmonella recovery was lower in the fall (41%) sampling period than …

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Meiofaunal Colonization Of Artificial Substrates., Nazan Atilla Jan 2001

Meiofaunal Colonization Of Artificial Substrates., Nazan Atilla

LSU Historical Dissertations and Theses

Meiofaunal colonization of artificial substrates was investigated in a shallow estuarine embayment. Meiofauna colonized various artificial substrates rapidly, at a rate of 1000 individuals collector-1 day -1 regardless of season, suggesting that high abundances of meiofauna commonly exist in the water column. These water-column meiofauna may be important in fish diets and may serve as a dispersing pool that aids recolonization after disturbance events. Colonization of artificial substrates by transient meiofauna of unknown origin(s) occurred through the water column. To determine the source of meiofauna colonizing artificial substrates, sediment and pier-piling meiofauna were sampled and compared to artificial-substrate colonists. Assemblages …

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A Drifter Study Of Advection, Deformations, And Patch Variances With Application To Larval Transport And Dispersal In Barataria Bay, Louisiana., Terry L. Schaefer Jan 2001

A Drifter Study Of Advection, Deformations, And Patch Variances With Application To Larval Transport And Dispersal In Barataria Bay, Louisiana., Terry L. Schaefer

LSU Historical Dissertations and Theses

Field studies were conducted to characterize flow fields and their effect on larval transport and retention within Barataria Bay, Louisiana. Drifter tracking and passive larval sampling was conducted monthly during the spring and summer months from 1994 through 1996. Fifteen drifter tracking sessions were conducted over full tidal cycles (diurnal). Drifter positions were determined approximately every thirty minutes using a GPS receiver. A spline interpolation was used to estimate drifter positions at synchronous five-minute intervals. An analytical methodology of Okubo and coworkers was used to compute deformations; and changes in patch variances from the drifter positions. Mean tidal advection and …

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