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Physicochemical Influences On Parasites Of Age-0 Largemouth Bass In The Atchafalaya River Basin, Louisiana, Randy C. Landry, William E. Kelso Jan 1999

Physicochemical Influences On Parasites Of Age-0 Largemouth Bass In The Atchafalaya River Basin, Louisiana, Randy C. Landry, William E. Kelso

Faculty Publications

We investigated prevalence and intensity patterns of nine parasite taxa in 244 age-0 largemouth bass (Micropterus salmoides) collected from lake (high dissolved oxygen levels), riverine (high current velocities), and swamp (hypoxic canals and bayous) sites (N=6) in the Atchafalaya River Basin during the 1996 flood pulse. Ectoparasites were dominated by monogenetic trematodes (prevalence=100%; median intensities 27–91 per host) and glochidia (prevalence > 96% at all sites, median intensities 47–148 per host), whereas Posthodiplostomum minimum (Trematoda), Caecincola spp. (Trematoda; C. parvulus and perhaps C. latostoma), Neoechinorhynchus cylindratus (Acanthocephala), and Proteocephalus ambloplitis (Cestoda) accounted for 94.6% of bass endoparasites. Overall, lake sites supported …

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Characterization Of A Simian Hemorrhagic Fever Virus Large Envelope Glycoprotein Gene And Its Product., Xiaochun Wang Jan 1999

Characterization Of A Simian Hemorrhagic Fever Virus Large Envelope Glycoprotein Gene And Its Product., Xiaochun Wang

LSU Historical Dissertations and Theses

The goal of this project was to determine the genome organization, replication strategy and identification of the large envelope glycoprotein (GL) gene of simian hemorrhagic fever virus (SHFV). This virus is the fourth member of the new virus family Arteriviridae. The 3' end of the RNA genome from the prototype isolate of SHFV was cloned and sequenced. This 6,314 nucleotide (nt) sequence consisted of nine complete overlapping open reading frame (ORFs 2, 2a, 3, 4, 5, 6, 7, 8, and 9). At the 5' end of this sequence is a partial ORF, ORF 1b, and the 3' end is a …

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Expecting Women: Constructing The Pregnant Woman In Twentieth Century United States And British Dramatic Representation., Amelia Lynn Cuomo Jan 1999

Expecting Women: Constructing The Pregnant Woman In Twentieth Century United States And British Dramatic Representation., Amelia Lynn Cuomo

LSU Historical Dissertations and Theses

Pregnancy and issues surrounding pregnancy such as paternity and legitimacy have been presented in Western Drama since its inception. Pregnancy in the modern era, however, has become a complex issue. Abortion, birth control, and the advent of new reproductive technologies (such as in vitro fertilization) alter understandings of reproduction. This study explores twentieth century British and U.S. dramatic representations of the pregnant woman and analyzes how pregnant women are constructed in drama. The dissertation is divided into five chapters. Chapter One explores four plays by male playwrights: Harley Granville Barker's Waste, Eugene O'Neill's "Abortion," and Sidney Kingsley's Men in White …

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Ernest Renan And The Question Of Race., Jane Victoria Dagon Jan 1999

Ernest Renan And The Question Of Race., Jane Victoria Dagon

LSU Historical Dissertations and Theses

Racism in France can be traced back to the 1560's when the nobles claimed to be of a separate race in order to obtain special rights and privileges. Soon after in the seventeenth century, scientists started to classify humans according to physical features. With the increase in travel, the slave trade, the fear of the unknown and the fear of contamination, these factors along with physiognomy and phrenology encouraged "biological racism." During the second half of the nineteenth century, Ernest Renan (1823--1892) denounces biological racism and the existence of the so-called "pure races." He is also the first dramatist to …

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Situational Frequency And Retrieval: The Effect Of Revelation On The Judgments For Occurrence Of Events., Craig Barton Neely Jan 1999

Situational Frequency And Retrieval: The Effect Of Revelation On The Judgments For Occurrence Of Events., Craig Barton Neely

LSU Historical Dissertations and Theses

Only one prior experiment has examined the effect of revelation on situational frequency judgments (Exp. 3, Greene, 1996). In the current study, three experiments examined the effect of revelation on frequency estimation. Experiment 1A and 1B replicated and extended the study done by Greene (1996) by increasing the frequencies of study items from one to eight in both a random (1A) and blocked (1B) design. Experiment 2 examined the relation between the frequency of study items and the degree of distortion of the items revealed at test. A significant effect of revelation was found across frequencies for the three revealed …

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Georges Henein, Poete Des Marges., Evelyne M. Bornier Jan 1999

Georges Henein, Poete Des Marges., Evelyne M. Bornier

LSU Historical Dissertations and Theses

This dissertation explores the Franco-Egyptian cultural and literary interactions in the mid-20th century, and examines the importance of these exchanges in the writings and intellectual journey of poet Georges Henein (1914--1973). This study is divided into three chapters. In a first chapter, I define the origins and stakes of a francophone Egyptian movement born from a small group of intellectuals of various cultures, who embraced French as their lingua franca. I explore this movement from a socio-historical and literary point of view, and through an overview of the period (1910--1962), lay the ground to a study of Egyptian-born writer Georges …

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An Investigation Of Opinions Of Public Officials And The General Public Concerning Solid Waste Issues With Implications For Extension Programming., William A. Carney Jr Jan 1999

An Investigation Of Opinions Of Public Officials And The General Public Concerning Solid Waste Issues With Implications For Extension Programming., William A. Carney Jr

LSU Historical Dissertations and Theses

The primary purpose of this study was to determine opinions of public officials and the general public concerning solid waste disposal, and to make recommendations for future Extension programming. The study utilized four focus group interviews to obtain qualitative data. The two urban groups were composed of municipal public officials from the parishes of Jefferson, East Baton Rouge, Lafayette and Rapides and general public participants from the parishes of East Baton Rouge, West Baton Rouge, and Livingston. The two rural groups consisted of public officials from the parishes of Acadia, Jefferson Davis and Vermilion and general public participants from the …

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A Comprehensive Functional Assessment Of The Effects Of Methylphenidate On The Disruptive Behavior Of Children With Severe Mental Retardation., Victoria C. Swanson Jan 1999

A Comprehensive Functional Assessment Of The Effects Of Methylphenidate On The Disruptive Behavior Of Children With Severe Mental Retardation., Victoria C. Swanson

LSU Historical Dissertations and Theses

Methylphenidate (MPH) has proven efficacy with the disruptive behaviors of children with ADHD in regular education settings (Gully and Northup, 1997; Northup et el., 1999; in press). Blum, Mauk, McComas, and Mace (1996) researched the separate and combined effects of behavioral and MPH treatments on the task engagement and disruptive behavior of 3 children with severe to profound mental retardation. This study used a single-subject, multielement or alternating treatment design to assess the separate and combined effects of MPH and behavioral treatments on the performance of 5 children with severe to profound mental retardation. MPH effects were evaluated within and …

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The Effect Of Exercise On Immune Function In Equids., Robert William Folsom Jan 1999

The Effect Of Exercise On Immune Function In Equids., Robert William Folsom

LSU Historical Dissertations and Theses

The effect of exercise stress on immune modulation and the mechanisms involved were examined in ponies and horses subjected to a strenuous treadmill-based exercise program. The magnitude of changes in exercise-induced cortisol production, lactate, and immunomodulation increased with increases in exercise intensity and the highest levels of each were seen in animals that attained heart rates greater than 200 bpm. Influenza vaccinated ponies and horses were exercised at heart rates greater than 200 bpm for 5 consecutive days and stress tests were performed on days 1 and 5. Exercised animals exhibited significant increases in plasma lactate, plasma cortisol, LAK cell …

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Characterization Of The Microsomal Mixed -Function Oxidase System Of Several Species Of Sea Anemones (Phylum: Cnidaria)., Linda Marie Heffernan Jan 1999

Characterization Of The Microsomal Mixed -Function Oxidase System Of Several Species Of Sea Anemones (Phylum: Cnidaria)., Linda Marie Heffernan

LSU Historical Dissertations and Theses

Several studies have demonstrated detrimental effects of anthropogenic compounds on coral reef communities. These compounds are known to be bioaccumulated rapidly, but eliminated slowly by anthozoans (i.e., corals and sea anemones). The cytochrome P450-dependent mixed function oxidase (MFO) system is the primary pathway for initial oxidation of many hydrophobic exogenous compounds; however, its presence had not been well documented in anthozoans. The studies reported herein show that a functional cytochrome P450-dependent MFO is present in the microsomal fraction of the sea anemones Anthopleura xanthogrammica , A. elegantissima, and Bunodosoma cavernata . The evidence is based on the presence of classical …

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Systematics Of The Common Garter Snake, Thamnophis Sirtalis., John Jeffrey Boundy Jan 1999

Systematics Of The Common Garter Snake, Thamnophis Sirtalis., John Jeffrey Boundy

LSU Historical Dissertations and Theses

Character variation was examined in the snake Thamnophis sirtalis . Initially, 187 characters were examined on five populations (OTUs). Only 12% of the characters failed to show geographic variation by ANOVA. A reduced data set of 72 characters remained after eliminating those that were invariant and correlated. The reduced data set was analyzed for interpopulation variation between 37 OTUs, of T. sirtalis. Numbers of significantly differentiated characters between OTUs, determined by ANOVA, were used to generate a UPGMA tree. The tree placed Texas and Chihuahuan populations as sister groups to all other OTUs, and grouped OTUs from west of the …

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Reduction Of Endogenous Bacteria Associated With Catfish (Ictalurus Punctatus) Fillets Using The Grovac Process., Milton Ruben Ramos Jan 1999

Reduction Of Endogenous Bacteria Associated With Catfish (Ictalurus Punctatus) Fillets Using The Grovac Process., Milton Ruben Ramos

LSU Historical Dissertations and Theses

Fresh catfish (Ictalurus punctatus) fillets (CF) can serve as vehicles for spoilage and pathogenic bacteria. Concern for the microbiological safety of chilled CF has grown lately because psychrotrophic pathogens can survive and grow at refrigeration temperatures. The Grovac method, a new, patented (U.S. 5,543,163) process is being used in an attempt to reduce the growth of pathogens and spoilage microorganisms in CF. This process involves the using of a process solution of ascorbic acid (AA) and sodium chloride (NaCl), vacuum and tumbling. Specific objectives of this study included the isolation and identification of endogenous microflora associated with fresh whole catfish …

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Sire Selection And Mating Practices In United States Dairy Herd Improvement Association Holstein Herds., Asiye Yilmaz Jan 1999

Sire Selection And Mating Practices In United States Dairy Herd Improvement Association Holstein Herds., Asiye Yilmaz

LSU Historical Dissertations and Theses

Over two million Holstein mating records was used to investigate selection and mating practices. Population statistics revealed non-random mating and selection. Herd production level was associated with higher breeding value sires and price paid per unit of semen. The decision to use an Artificial Insemination (AI) sire or natural service sire was studied and a discriminant function was derived that accurately categorized matings in a test data set of 117,000 observations, with an error rate less than 2.5 percent. Discriminating variables were herd production level, lactation number, service number, breeding month, cow status code, and days in milk at breeding. …

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Practicing Freedom With Care: The Development Of Warrior-Caregiving In Contemporary Literature From The Americas., Joanna Barszewska Marshall Jan 1999

Practicing Freedom With Care: The Development Of Warrior-Caregiving In Contemporary Literature From The Americas., Joanna Barszewska Marshall

LSU Historical Dissertations and Theses

Taking my cue from Toni Morrison's Playing in the Dark, I read three contemporary Black writers in the Americas---George Lamming, Barbados; Michelle Cliff, Jamaica; and Jess Mowry, United States---for signs of a response that was ignored when prevailing conceptions of freedom were formulated in early America. Suggesting that the vision embodied in the name of one plantation, Sans Souci, characterized attempts to deal with the anxieties of a slaveholding free republic, I argue that these writers provide an alternative vision by attempting to reconcile the practices of freedom and care, and I engage their vision in dialogue with several theoretical …

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How The Villanelle's Form Got Fixed., Julie Ellen Kane Jan 1999

How The Villanelle's Form Got Fixed., Julie Ellen Kane

LSU Historical Dissertations and Theses

This work debunks the myth of the villanelle as a "fixed poetic form" dating back to the sixteenth century or earlier and replaces it with a new-historical account of how a semi-improvisatory musico-poetic genre, the choral-dance lyric, was "translated" across ruptures in lyric technology between oral, manuscript, and print cultures. The "fixity" of the villanelle's written form is shown to be not a matter of long-standing "heritage" or "tradition," but the result of deliberate actions taken by one eighteenth- and one nineteenth-century individual who inserted less-than-truthful passages into otherwise "authoritative" prosodic treatises. Chapter 1 identifies the literary sources responsible for …

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Sediment-Air Partitioning Of Hydrophobic Organic Chemicals., Guilhem De Seze Jan 1999

Sediment-Air Partitioning Of Hydrophobic Organic Chemicals., Guilhem De Seze

LSU Historical Dissertations and Theses

Contaminated sediments that become exposed to the air as a result of dredging or water receding are potential sources of emissions of toxic compounds to the atmosphere. Exposure models are currently being developed to assess the risk associated with this pathway of contaminant release and to design efficient remediation techniques. A critical parameter in these emission models is the equilibrium partition coefficient of the contaminant between the sediment and the air. In this study, the sediment-air equilibrium partitioning of a polymiclear aromatic hydrocarbon (phenanthrene) and a heterocyclic aromatic hydrocarbon (dibenzofuran) was investigated. Both classes of compounds are commonly found in …

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Effects Of Winter Burning And Structural Marsh Management On Bird And Plant Communities Of The Gulf Coast Chenier Plain., Steven Walter Gabrey Jan 1999

Effects Of Winter Burning And Structural Marsh Management On Bird And Plant Communities Of The Gulf Coast Chenier Plain., Steven Walter Gabrey

LSU Historical Dissertations and Theses

Many Gulf Coast Chenier Plain marshes are managed through a combination of winter burning and structural marsh management (SMM) to improve habitats for waterfowl and furbearers and reduce wetland loss. These practices are controversial because of concerns regarding ability to achieve goals coupled with potential negative effects on other marsh processes or organisms. I investigated the effects of winter burning and SMM on bird and plant communities of Chenier Plain marshes in southwest Louisiana. I recorded bird and plant species abundance and vegetation structure in experimental burned and unburned marshes over two winters and three breeding seasons. Vegetation structure (visual …

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Holding Back The Waters: Land Development And The Origins Of Levees On The Mississippi, 1720-1845., Jeffrey Alan Owens Jan 1999

Holding Back The Waters: Land Development And The Origins Of Levees On The Mississippi, 1720-1845., Jeffrey Alan Owens

LSU Historical Dissertations and Theses

Man's efforts to control flooding on the Mississippi began about 280 years ago, but the first 130 years has been neglected in scholarly literature. In spite of abundant primary sources, most histories of flood control on the Mississippi revolve around hydraulic engineering and the contributions of state and federal levee bureaucracies---factors which had almost no impact on the creation of the levee system. Engineers did install the first levee at New Orleans and levees on their own plantations in the 1720s, but the extension of the levee line thereafter was almost entirely the work of private land developers supervised at …

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Studies On Cyclooxygenase-2 Expression In Lipopolysaccharide-Stimulated Macrophages., Byeong Churl Jang Jan 1999

Studies On Cyclooxygenase-2 Expression In Lipopolysaccharide-Stimulated Macrophages., Byeong Churl Jang

LSU Historical Dissertations and Theses

Cyclooxygenase (COX) is the key enzyme in the biosynthesis of prostaglandins (PGs) known as pro-inflammatory mediators. COX has two isoforms: the constitutively expressed COX-1 and the mitogen-inducible COX-2. It has been demonstrated that COX-2 expression is selectively induced by lipopolysaccharide (LPS) treatment after several hours in rat alveolar macrophages (Lee et al., 1992; Chanmugam et al., 1995). The mitogen-activated protein kinases [MAPKs; extracellular signal-regulated kinases (ERKs), P38, and c-jun N-terminal kinases (JNKs)], nuclear factor kappa B (NF-kB), and Lyn kinase are known to be activated in the early stages (within minutes) of LPS signaling pathways. In the current study, the …

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How Does Undergraduate College Biology Students' Level Of Understanding, In Regard To The Role Of The Seed Plant Root System, Relate To Their Level Of Understanding Of Photosynthesis?, James Gicheha Njeng'ere Jan 1999

How Does Undergraduate College Biology Students' Level Of Understanding, In Regard To The Role Of The Seed Plant Root System, Relate To Their Level Of Understanding Of Photosynthesis?, James Gicheha Njeng'ere

LSU Historical Dissertations and Theses

This research study investigated how undergraduate college biology students' level of understanding of the role of the seed plant root system relates to their level of understanding of photosynthesis. This research was conducted with 65 undergraduate non-majors biology who had completed 1 year of biology at Louisiana State University in Baton Rouge and Southeastern Louisiana University in Hammond. A root probe instrument was developed from some scientifically acceptable propositional statements about the root system, the process of photosynthesis, as well as the holistic nature of the tree. These were derived from research reviews of the science education and the arboriculture …

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The Historical And Cultural Geography Of The Grange In Minnesota And Louisiana, 1870-1880., Linda Marie Thorstad Jan 1999

The Historical And Cultural Geography Of The Grange In Minnesota And Louisiana, 1870-1880., Linda Marie Thorstad

LSU Historical Dissertations and Theses

This study uses historical and geographical inquiry to examine postbellum agrarian social, political and economic unrest that in 1868 led to the formation of the first national, secret and ritualistic, fraternal agricultural society known as the Grange. The Grange was created to unite farmers through cooperative buying and selling, to promote agricultural education, and to create a social organization that encouraged both women and men to acquire and refine leadership skills. It also sought to address concerns over monopolies and promoted state regulation of railroad rates. Although Grange membership peaked in 1875 and sharply declined through 1880, it forged the …

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Effects Of Fluctuating Salinity, Nutritional State, And Temperature On Leptasterias Spp. From Little Port Walter, Alaska., Jeffrey William Tamplin Jan 1999

Effects Of Fluctuating Salinity, Nutritional State, And Temperature On Leptasterias Spp. From Little Port Walter, Alaska., Jeffrey William Tamplin

LSU Historical Dissertations and Theses

The effects of fluctuating salinity, nutritional state, and temperature on activity, oxygen consumption, feeding, and growth rates were analyzed on seasonally collected Leptasterias spp. (Echinodermata: Asteroidea) from Little Port Walter, AK. Leptasterias aspera and L. epichlora were collected on June 10, 1994, divided into size groups, and perivisceral fluid osmolality was measured every three hours during a 12 h 30-10-30‰S fluctuating cycle. The perivisceral fluid osmolality of larger individuals fluctuated less than that of smaller sea stars. The perivisceral fluid osmolality of small and large Leptasterias spp. closely tracks the ambient water osmolality during tidal cycles. Leptasterias spp. were collected …

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In Vivo And In Vitro Stimulation Of Murine Splenocytes With Brevetoxin-2 Immunogenic Conjugates For The Preparation Of Monoclonal Antibodies Against Ciguatoxin-Related Compounds., Sonia Edith Guzman Perez Jan 1999

In Vivo And In Vitro Stimulation Of Murine Splenocytes With Brevetoxin-2 Immunogenic Conjugates For The Preparation Of Monoclonal Antibodies Against Ciguatoxin-Related Compounds., Sonia Edith Guzman Perez

LSU Historical Dissertations and Theses

The proliferation of toxic algae is a natural phenomenon known as a harmful algal bloom. Ciguatera fish poisoning and neurotoxic fish poisoning are syndromes associated with this phenomenon. Current methods for the detection of their toxins (ciguatoxins and brevetoxins) are expensive, time-consuming, require trained personnel and special laboratory equipment. In the case of ciguatoxins, the lack of standard material worsens the problem. Specific objectives of this study included the use of brevetoxin-2 (PbTx-2) for the preparation of antibodies which could cross-react with ciguatoxins, the use of different PbTx-2 immunogenic conjugates, the use of in vivo versus in vitro stimulation of …

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Biological Diversity And Cultural Survival: Mopan Maya Traditional Culture And Environmental Change In Southern Belize., Michael Kenneth Steinberg Jan 1999

Biological Diversity And Cultural Survival: Mopan Maya Traditional Culture And Environmental Change In Southern Belize., Michael Kenneth Steinberg

LSU Historical Dissertations and Theses

This dissertation is a study of the causal relationship between the decline of cultural diversity and environmental diversity. My study investigates the larger-scale economic, political, and social factors that result in the rejection of traditional land use strategies and how these changing strategies ultimately lead to an overall decline in environmental diversity in the Mopan Maya landscape in southern Belize. Five Mopan Maya cultural biogeographic case studies are presented, including the management of maize diversity, the species composition and variability of kitchen gardens, swidden-fallow agroforestry practices, traditional bee keeping, and hunting game and habitat preferences. These topics were chosen because …

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Production Of L-(+) Lactic Acid From Blackstrap Molasses By Lactobacillus Casei Subspecies Rhamnosus Atcc 11443., Narumol Thongwai Jan 1999

Production Of L-(+) Lactic Acid From Blackstrap Molasses By Lactobacillus Casei Subspecies Rhamnosus Atcc 11443., Narumol Thongwai

LSU Historical Dissertations and Theses

Lactobacillus casei subspecies rhamnosus grew on non-supplemented blackstrap molasses. The bacteria grew best at the optimal temperature of 40 +/- 2°C, and at pH 5.5. Addition of yeast extract to molasses shortened the lag phase and increased cell mass. In batch fermentations without pH control, the highest ratio of lactic acid produced to cell mass was 12 from non-supplemented molasses. For pH controlled batch fermentations, the ratio's of lactic acid produced/cell mass were 81, 79, 51 and 31 for 0, 0.2, 0.4 and 0.8% yeast extract supplementation, respectively. Non-supplemented molasses, 8% Brix, produced 28 +/- 2 g/l of lactic acid …

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Development Of Immunochemical Methods For Gossypol Analysis., Xi Wang Jan 1999

Development Of Immunochemical Methods For Gossypol Analysis., Xi Wang

LSU Historical Dissertations and Theses

Gossypol is a reactive polyphenolic compound present in the cotton plant. During cottonseed processing, gossypol can react with other compounds to form bound gossypol. Gossypol analyses using chemical methods do not always agree with its bioavailability to animal possibly because of various bound forms of gossypol with different stabilities in vivo and the (+/-)-gossypol enantiomers with different biological activities. The objectives of this research were to produce anti-gossypol antibodies and use antibodies to study gossypol chemistry and to analyze gossypol in cottonseed samples and cottonseed by-products. Polyclonal antibodies were produced from rabbits after they were immunized with gossypol-LPH (Limulus polyphemus …

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Isolation Of Antimutagenic Compounds In Corn And Cottonseed., Henry Njapau Jan 1999

Isolation Of Antimutagenic Compounds In Corn And Cottonseed., Henry Njapau

LSU Historical Dissertations and Theses

Food, which ensures the sustenance of life, has also been implicated in the development or prevention of numerous diseases including cancer. Cancer may be a result of hereditary factors or genomic instability induced by DNA damage, from the intrinsic chemistry of cells or extrinsic factors like aflatoxin B1. Aflatoxin B1, produced by Aspergillus flavus and Aspergillus parasiticus, is a common contaminant of corn and cottonseed and a proven mutagen and animal carcinogen. Increased scientific knowledge and establishment of regulation have reduced but not eliminated exposure to aflatoxin B1. Complete elimination may be uneconomical for producers and may deprive consumers of …

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Sire Differences For Growth And Carcass Traits Of Purebred Brahman Steers., Trent Smith Jan 1999

Sire Differences For Growth And Carcass Traits Of Purebred Brahman Steers., Trent Smith

LSU Historical Dissertations and Theses

Purebred Brahman steers (n = 169) sired by 23 Gray and 8 Red Brahman bulls were evaluated for postweaning growth and carcass traits. Spring-born paternal half-sib male calves were purchased from private producers at weaning, backgrounded, and grazed on ryegrass for an average of 161 d. Following grazing, the steers were shipped to a commercial feedlot in south Texas for feeding. Steers were slaughtered in groups of about 45 head when they reached an approximate average endpoint weight of 530 kg and 1 cm backfat. All carcasses were subjected to high voltage electrical stimulation during slaughter. After a 24 hr …

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Preparing New Teachers To Use Technology: A Comparative Study Of Preservice Teacher Education Programs., Patricia Ann Duhon Jan 1999

Preparing New Teachers To Use Technology: A Comparative Study Of Preservice Teacher Education Programs., Patricia Ann Duhon

LSU Historical Dissertations and Theses

The purpose of this descriptive study was to describe and analyze the technology components in three teacher education programs, and to investigate the technological preparedness of recently graduated first-year elementary (K--5) teachers. The research questions addressed were: (a) How are the teacher education programs at each university in this study preparing students to integrate technology into their classrooms and instruction, and how do the programs compare? (b) How do recently graduated first-year teachers at each university rate their skills in using technology, and how do their ratings compare? (c) How and to what extent do recently graduated first-year teachers at …

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Experimental Mammalian Predator Removal And Other Factors Affecting Dabbling Duck Reproduction In North Dakota., Pamela Renee Garrettson Jan 1999

Experimental Mammalian Predator Removal And Other Factors Affecting Dabbling Duck Reproduction In North Dakota., Pamela Renee Garrettson

LSU Historical Dissertations and Theses

In the prairie pothole region, high predation rates often reduce duck nest success below the 15--20% thought necessary for population stability. Lethal removal of mammalian predators of duck nests is one potential management option, but there is little reliable information about the effects on nest success of removing mammalian predators without using poisons. On 16 4,150-ha blocks, half of them trapped during spring and summer, I found higher ( P < 0.001) nest success on trapped sites (45%) than on untrapped sites (17%). There were no year (P = 0.296), year-treatment (P = 0.423), or species-treatment (P > 0.895) effects. Nest success of blue-winged teal (Anas discors) and gadwalls (A. strepera) was higher than that of mallards ( A. platyrhynchos) and pintails (A. acuta, P = 0.028) on …

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