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Feeding And Microspatial Relationships Of Meiobenthic Harpacticoid Copepods With Microbial Flora., Alan William Decho

LSU Historical Dissertations and Theses

Feeding processes and their relationship to microspatial patterns were examined for several harpacticoid species. Field evidences and laboratory radiolabel experiments suggest that diatoms comprise a major portion of the food resources ingested by harpacticoids. Bacteria and mucus-exopolymer secretions (associated with the bacteria and diatoms) are also ingested, coincidently while ingesting diatoms. Also, significant ontogenetic shifts in food resource utilization occur from naupliar to adult stages. Field grazing rate studies were conducted on an intertidal mudflat over different portions of a tidal cycle using several harpacticoid species (Scottolana canadensis, Microarthridion littorale, Paronychocamptus huntsmani). Highest grazing rates for S. canadensis occurred just …

The Production, Culture And Cryopreservation Of Bovine Demi-Embryos., Rickey Wayne Rorie

LSU Historical Dissertations and Theses

The objective of experiment (Exp) I was to develop and evaluate a simplified method for producing bovine demi-embryos (DE). Treatment (Trt) A and B were the bisection zona pellucida intact (ZI) and free (ZF) embryos, respectively, using a microscope slide micromanipulator. In Trt C and D, ZI and ZF embryos, respectively, were bisected with a hand-held razor blade method. More DE were produced by the razor blade method (Trt C and D) than by the microscope slide micromanipulator method (Trt A and B). More DE were produced from ZF embryos (Trt B and D) than from ZI embryos (Trt A …

Physiological Aspects Of Bovine Mammary Involution: A Biochemical And Morphological Investigation., Lorraine Marie Sordillo

LSU Historical Dissertations and Theses

Quarter milk secretion samples and blood serum for compositional analysis were collected weekly from 29 cows beginning at drying off and continuing until 2 weeks postpartum. Quarter biopsies were taken from 5 additional animals at weekly intervals beginning at drying off through parturition. Histological and cytological parameters of tissues were correlated with biochemical characteristics of secretions. Increased tight junction permeability and decreased synthetic ability of secretory epithelium became evident by changes in mammary secretion composition and tissue morphology during the first 2 weeks of involution. Somatic cell counts, serum albumin, lactoferrin, immunoglobulin G, pH, total protein, and serum concentrations of …

Estimation Of Direct And Maternal Additive And Heterotic Genetic Effects For Preweaning Traits In Beef Cattle., Chi Lawrence Tawah

LSU Historical Dissertations and Theses

Progency records from 4 generations of a rotational crossbreeding experiment were fitted to a regression equation to obtain estimates of direct and maternal additive (Ig, Mg) and heterotic (Ih, Mh) genetic effects of preweaning traits for Angus (A), Brahman (B), Charolais (C), Hereford (H) breeds and their combinations. These estimates were fitted to prediction equations to compare preweaning performance of breed groups under different mating systems. Heterosis estimates were used to compute expected heterosis for each rotational cross. The C had the largest Ig estimate for BWT (5.2 kg), ADG (.074 kg/d) and WWT (22.1 kg) while H had the …

The Relationship Between Supervisory Methods And Teacher Self-Concept As A Teacher And As A Person., Annis Dowden Tarver

LSU Historical Dissertations and Theses

This study was designed to test the relationship between methods of supervision used during the supervisory conference and teacher self-concept as a teacher and as a person. The method of supervision, the independent variable in the research design, was either clinical supervision using the Hunter (1980) method or traditional supervision. The clinical method of supervision used specific, diagnostic, and prescriptive feedback given by the supervisor during a series of supervisory conferences that followed the five types of supervisory conferences proposed by Hunter. The traditional method of supervision used general and non-specific feedback given by the supervisor during a series of …

Influences Of Different Processing Technologies On The Properties Of Emulsion-Type Sausages., Yun-Chu Wu

LSU Historical Dissertations and Theses

Emulsion-type sausages were manufactured for evaluation of microstructure, smokehouse yield, and textural characteristics with different lean sources, salt levels, casing sizes and endpoint cooking temperatures. Emulsion stability and water binding capacity of raw batters manufactured with 1, 2 or 3% salt were examined at chopping temperatures of 10, 15.5 and 21$\sp\circ$C. Frankfurters, manufactured with three sources of pork fat, were examined during a nine week storage for oxidative rancidity under different packaging conditions. Bologna from forage-finished beef had lower water, fat and total losses and a higher smokehouse yield than bologna from grain-fed beef at 1 and 2% salt levels. …

Development Of A Soft-Tissue Infection Model In The Cow., Cyril Roy Clarke

LSU Historical Dissertations and Theses

The ultimate goals of this study were to develop and define a subcutaneous tissue chamber as a suitable device for establishing a Pasteurella haemolytica soft-tissue infection model in cattle and to use this model to study the in vivo efficacy and distribution of a potentiated sulfa antimicrobial. Developmental studies resulted in the selection of a suitable tissue chamber design that maximized the chamber penetration of an intravenously administered lipid-soluble drug. This chamber could be sampled with ease and contained enough chamber fluid to allow repetitive sampling. Cytological and chemical investigation revealed that the composition of fluid within chambers approached the …

Studies On The Protein Changes In Skeletal Muscles Of Gulf Coast Finfish Species Associated With Frozen Storage, Formaldehyde Addition And Freeze-Thawing Cycles., Myrna O. Nisperos-Carriedo

LSU Historical Dissertations and Theses

The effects of frozen storage, formaldehyde addition and freeze-thawing cycles were determined using three finfish species from the Gulf of Mexico, spotted seatrout (Cynoscion nebulosus), black drum (Pogonias cromis) and mullet (Mugil cephalus). Frozen storage of spotted seatrout fillets at $-20\sp\circ$C for 6 weeks led to reductions in pH, water-binding capacity and solubility of salt-extractable proteins. SDS-Polyacrylamide gel electrophoretic examination of the salt-extractable proteins showed that as time of storage increased, aggregation of high-molecular weight components occurred. The addition of 300 ppm formaldehyde prior to frozen storage did not produce significant changes. However, muscles containing 500 ppm formaldehyde showed decreases …

Characterization Of Equine Infectious Anemia Virus Variants Generated In Vivo And In Vitro And A Rapid Assay For Virus-Specific Antibody., Paul Murumba Rwambo

LSU Historical Dissertations and Theses

Three Shetland ponies (A, B and C) were inoculated with plasma from a pony with clinical signs of equine infectious anemia (EIA) and observed for 165 to 440 days. Clinical signs of EIA marked by high fever (39.5$\sp\circ$C) lasting 2-4 days were observed 2-3 weeks after infection and one to four such episodes occurred in each pony. EIAV was reisolated from plasma by end-point dilution in fetal equine kidney (FEK) cells and a plasma viremia 10$\sp{3.5}$ TCID$\sb{50}$/ml was observed during each episode. A total of seven virus isolates were recovered. Cross-neutralization tests with sequential serum samples showed that four viruses …

Geographic Variation In Morphology And Allozymes Within Tree Squirrels, Sciurus Niger And S. Carolinensis, Of The Lower Mississippi River Valley., Nancy D. Moncrief

LSU Historical Dissertations and Theses

Geographic variation was studied in fox squirrels, Sciurus niger, and gray squirrels, S. carolinensis, by comparing patterns of differentiation within and between these two sympatric species. Patterns of variation were examined in light of the lower Mississippi River as a potential barrier to dispersal and gene flow in these squirrels. Differences within and between species were analyzed using morphologic (15 cranial and mandibular measurements) and allozymic (35 presumptive gene loci) characters. Geographic patterns of variation among populations were apparent in the morphology and allozymes of both species; patterns of differentiation in morphologic and allozymic characters are similar between species; however, …

Malaysian Prawn (Macrobrachium Rosenbergii) Production Studies In Polyculture Schemes With Channel Catfish (Ictalurus Punctatus)., Mark Steven Lamon

LSU Historical Dissertations and Theses

Three Malaysian prawn (Macrobrachium rosenbergii)/channel catfish (Ictalurus punctatus) polyculture studies were conducted from May 1984 through October 1986. In the first study prawn stocking size and density on catfish and prawn production were examined. In 1984 catfish, x = 24 g, were stocked at 9,884/ha. Prawns, x = 0.04 g, were stocked at 4,942, 9,884 and 14,826/ha. After 144 days catfish average weights, survival and yields were $<$340 g, $<$78% and $<$2,000 kg/ha, respectively. Prawn weight, survival and yields ranged from 34-54 g, 47-61% and 165-344 kg/ha, respectively. In 1985 catfish, x = 33 g, were stocked at 7,410/ha and prawns, x = 0.15 and 0.70 g, were stocked at 1984 densities. After 137 days catfish average weight, survival and yields were 427 g, 86% and 2,726 kg/ha, respectively. Prawn weight, survival and yields ranged from 48-73 g, 41-88% and 110-471 kg/ha, respectively. Positive economic net returns were achieved with 0.15 g prawns stocked at 14,826/ha and 0.70 g prawns stocked at 9,884 or 14,826/ha. In a second study prawn bottom location preference and movement were determined in ponds. Males were more frequently observed in the deep ends of ponds and near the ponds' perimeters, and females were observed more frequently in the shallow ends and in the middles of ponds. Prawn movement did not differ between day and night, averaging 1.1 m/hr. Two-funnel crawfish traps and box traps with slit entrances, 12 and 24 hr set times, and white light and commercial crawfish bait attractants were evaluated for capturing prawns. Traps were not effective at capturing prawns regardless of set time or attractant. In the third study catfish and prawn mean lengths and weights from cast-netted and seined samples were compared to a complete population census taken after 48, 92 and 139 days of growth. Ponds were stocked with catfish at 7,410/ha and prawns at 1984 study levels. Cast-netted samples under-estimated and seined samples over-estimated catfish size. Cast-netted and seined sample prawn means did not differ from each other or population parameters. Catfish and prawn size variation increased over time. Catfish and prawn survival decreased during the first 48 days and then remained constant throughout the rest of the grow-out period.

Characteristics Of Rumen Fluid And Particulate Microorganisms And The Effect Of Particulate Microorganisms On In Situ Forage Digestibility., John Adeoye Olubobokun

LSU Historical Dissertations and Theses

The effect of diet and time after feeding on microbial crude protein (CP) and dry matter (DM) associated with undigested rumen particles was investigated using diaminopimelic acid (DAPA) as a microbial marker. In a subsequent experiment, in situ CP and DM digestibilities were corrected for microbial contamination of non-masticated and masticated (M) forages. Particle-associated (PA) microorganisms had a higher (P $<$.01) concentration of organic matter (OM) than fluid microorganisms 2 and 23 h after feeding. Bacterial fraction had a higher (P $<$.01) concentration of CP than protozoal fraction. However, the quantity of OM, CP and DAPA per ml of strained rumen fluid equivalent were higher (P $<$.01) in the protozoal than in respective bacterial fractions. In experiment two, CP and DAPA concentrations (%) and quantity (mg/ml SRFE) of OM, CP and DAPA were constant over time (P $>$.10) in fluid, loosely-associated (LA) and firmly-associated (FA) populations. Mean CP and DAPA concentrations were in the order fluid $>$ LA $>$ FA and fluid = FA $$ fluid (P =.07). Over 50% of the PA population …

Cooking Temperature And Antioxidants As Processing Variables Affecting The Flavor And Textural Stability Of Restructured Beef Roasts., Genaro Cortes Arganosa

LSU Historical Dissertations and Theses

The effects of cooking temperature, refrigerated storage, and the presence of sodium tripolyphosphate (STP) and soy protein isolate (SPI) on the development of warmed-over flavor (WOF) in restructured beef roasts were studied. In Phase 1, restructured beef roasts were cooked in a water bath at temperatures of 70, 85 and 100$\sp\circ$C. In Phase 2, four types of roasts containing all combinations of STP and SPI were cooked in a water bath at 70 and 100$\sp\circ$C. The cooked roasts in both phases were then stored at 4$\sp\circ$C for 0 and 3 days. Higher cooking temperatures and longer storage periods tended to …

Estimation Of Heritabilities, Genetic Correlations, And Response To Selection For Growth, Body Size, And Processing Traits In Red Swamp Crawfish, Procambarus Clarkii (Girard)., Charles Gregory Lutz

LSU Historical Dissertations and Theses

Potential for genetic improvement of red swamp crawfish, Procambarus clarkii, and the possibility of negative selection for growth in cultured stocks as a result of harvesting practices have recently been the subject of speculation. This study provided indications of the potential for improvement of growth and processing traits in P. clarkii through selection. After 150 days growout in fiberglass pools planted with rice (Oryza sativa), P. clarkii from each of 39 full-sib families nested within 15 half-sib families were weighed and measured for total length, carapace length, carapace width, abdomen width, abdomen depth, chela length, chela width, abdomen meat weight, …

Analyses Of Selected Factors Affecting The Accuracy Of Aerial Surveys Of Mottled Ducks., James Ronald Nassar

LSU Historical Dissertations and Theses

Two experiments were conducted to test the effects of observer ability, ambient illumination, glare, sun angle, time of day, bird reaction, wetland type, vegetative cover, and non-flushing birds on results of aerial surveys of mottled ducks (Anas fulvigula). In Experiment I, aerial surveys for mottled ducks were conducted in Louisiana from January 1985 through April 1986 to determine the effects of observer, weather, glare, time of day, and bird reaction on results. An experienced, but non-current, waterfowl observer initially detected a greater number of birds than an experienced and current observer, observers did not differ in 17 subsequent surveys. Time …

Conformational Studies Of Carnitine And Acetylcarnitine: Design And Synthesis Of Active-Site Probes Of Carnitine Acetyltransferase., William Jay Colucci

LSU Historical Dissertations and Theses

The conformations of carnitine (Cn) and acetylcarnitine (AcCn) have been investigated through a combination of methods. The solid-state structures of their zwitter-ionic forms have been determined by single-crystal X-ray analyses. The crystal structures reveal different backbone conformations for the two molecules. Carnitine exists in an extended conformation (a,g $\sp-$ conformations for the C1-C2-C3-C4 and N1-C4-C3-O3 torsion angles, respectively), while AcCn exhibits a folded conformation ($g\sp-,g\sp-$). The solution conformations of Cn and AcCn have been investigated by high resolution $\sp1$H NMR coupling data. A simple equation has been developed for the prediction of torsion angles from $\sp3 J$ (HCCH) coupling constants. …

Consumption, Utilization, Biology, And Economic Injury Levels Of Fall Armyworm, Spodoptera Frugiperda (J. E. Smith), On Selected Bermudagrasses., Tasanee Jamjanya

LSU Historical Dissertations and Theses

The effects of nine bermudagrass, Cynodon dactylon (L.) Pers., varieties and strains on the development, survivorship, consumption and utilization, preference, and host suitability of the fall armyworm (FAW), Spodoptera frugiperda (J. E. Smith) were determined. The bermudagrasses tested were 'Coastal', 'Tifton 44', 'Tifton 78', 'Tifton 292', 'Grazer', #1 R12P5, 'OSU 71 X 6-7','OSU 74 X 11-2', and 'OSU 74 X 12-1'. 'Tifton 292' was the most preferred grass by neonate larvae, while 'OSU 74 X 11-2' was the least preferred grass. 'Tifton 78' was the most susceptible host, while 'OSU 71 X 6-7' was the least suitable host to FAW …

A Seasonal And Ontogenetic Examination Of The Reproductive Biology Of Pseudoplusia Includens (Walker)., Linda Jean Mason

LSU Historical Dissertations and Theses

Laboratory observations on the mating behavior of soybean loopers, Pseudoplusia includens (Walker), indicated a calling pattern that was highly variable both within individual females over time and among individuals. However, some trends were apparent. The onset of calling showed temporal advancement over the first three nights of calling after adult emergence; the duration of calling showed a temporal advancement during the first six nights, while the termination of calling receded over the same period then reversed its trend. The majority of females initiated calling three nights following emergence while maximum percent calling was observed around five hours after the onset …

Twenty Chinese Instruments And "Concerto East And West." (Original Composition)., Wayne Yunwei Chow

LSU Historical Dissertations and Theses

The first part of this dissertation describes twenty Chinese music instruments which appear to be the most popular instruments of the Han national people of China (China has fifty-six nationalities and Han is the majority). The reason for selecting these twenty, out of more than two hundred Chinese instruments existing today, is that they are the basic instruments of a modern Chinese orchestra. Instruments selected are the following: Di-zi, Suo-na, Guan-zi, and Sheng from the wind family; Pi-pa, Liu-qin, Yue-qin, Ran, San-xian, Yang-qin, and Zheng from the plucked string family (all strings are divided into two categories: strings which are …

Applications Of Silicon Compounds In The Synthesis Of Insect Pheromone Analogs., Oanh Thi Vu Nguyen

LSU Historical Dissertations and Theses

Pheromones are highly active chemical messengers which are secreted by a member of an animal species and elicit a definite behavior in other members of the same species. The study of insect pheromones has recently attracted great attention because of their purely scientific interest and their favorable prospects for the control of pest insects. The study in this dissertation aims at the elucidation of some important aspects of the mechanism of perception of insect pheromones, which is based on the fact that the cyclic analogs of the natural pheromone have partially fixed conformations, whereas the straight-chain natural pheromone is more …

Bovine Enteropathogenic Coronavirus: The Effect Of The Host Cell And Trypsin Modification On The Virus Structure, Cytopathic Expression, And Infectivity., Karen P. St. Cyr-Coats

LSU Historical Dissertations and Theses

Human rectal tumor-18 (HRT-18) cell clones 3F3, 3E3, D2, and 4B3 exhibited differences in cellular morphology in Giemsa-stained cultures and developing monolayers. Differences were evident in growth kinetics and plating efficiency of each clone. The clones produced colonies in soft agar, demonstrating anchorage independence. Cytopathic expression (CPE) including cytoplasmic vacuolization and cell fusion occurred in BCV-L9-infected clones 3F3, D2, and 3E3. Cell fusion was inapparent in clone 4B3. Bovine coronavirus strain L9 (BCV-L9) and 5 wild-type isolates replicated in HRT-18 cells, inducing cell fusion. Strain L9, exclusively, replicated in D2BFS cells, requiring trypsin to induce cell fusion. Strain L9 produced …

Field Evaluation And Genetic Analysis Of {\It Heliothis\/} Spp. Resistance In Advanced Lanthanum Cotton Strains., Stephen James Stringer

LSU Historical Dissertations and Theses

Seventeen advanced La cotton breeding strains having Heliothis spp. resistance attributed to morphological characters and allelochemics were evaluated for field resistance and flowerbud gossypol content at Baton Rouge, LA. in 1982 and 1983. These experimental cottons averaged less than 50% of the Heliothis spp. larvae and feeding-damaged fruit of two cotton cultivars recommended for production in Louisiana. These strains also had at least 25% less feeding-damaged fruit and 15% fewer live Heliothis spp. larvae than two Heliothis spp. resistant cotton germplasm lines. Results suggested that high flowerbud gossypol pigment glandulosity, rather than flowerbud gossypol content per se, played an important …

Active Immunization Of Intact Mares Against Gonadotropin-Releasing Hormone: Differential Effects On Secretion Of Luteinizing Hormone And Follicle-Stimulating Hormone, F. Garza, D. L. Thompson, D. D. French, J. J. Wiest, R. L. St George, K. B. Ashley, L. S. Jones, P. S. Mitchell, D. R. Mcneill

Faculty Publications

No abstract provided.

Louisiana Agriculture Magazine, Fall 1986, Lsu Agricultural Experiment Station

Louisiana Agriculture

No abstract provided.

Winter Food Habits Of Mink In Southern Louisiana, Andrew Jason Dolan

LSU Historical Dissertations and Theses

Mink food habits were determined by examining digestive tracts from animals trapped over four winters from forested wetland, crawfish farm, brackish marsh, fresh marsh, and ricefield habitats. In addition, an abdominal fat index was used to determine general body condition. Over all study areas, crawfish were the most important food items in mink diets, occurring in 64.6% of the tracts. Other major food groups - in order of decreasing frequencies of occurrence - were mammals, fishes, reptiles and amphibians, insects, and birds. Mink digestive tracts from the forested wetland habitat contained the greatest variety of food items. Forested wetland and …

Winter Food Habits Of Mink In Southern Louisiana, Andrew Jason Dolan

LSU Historical Dissertations and Theses

Mink food habits were determined by examining digestive tracts from animals trapped over four winters from forested wetland, crawfish farm, brackish marsh, fresh marsh, and ricefield habitats. In addition, an abdominal fat index was used to determine general body condition. Over all study areas, crawfish were the most important food items in mink diets, occurring in 64.6% of the tracts. Other major food groups - in order of decreasing frequencies of occurrence - were mammals, fishes, reptiles and amphibians, insects, and birds. Mink digestive tracts from the forested wetland habitat contained the greatest variety of food items. Forested wetland and …

Louisiana Agriculture Magazine, Summer 1986, Lsu Agricultural Experiment Station

Louisiana Agriculture

No abstract provided.

Historical Geography Of Toledo Settlement, Belize, 1868-1985: A Transition From Confederate To East Indian Landscapes, Michael Anthony Camille

LSU Historical Dissertations and Theses

The Toledo Settlement of southeastern Belize, today an East Indian community, was established in 1868 by 66 ex-Confederates. This study, a traditional historical geography, documents the major events that shaped the settlement and reconstructs the former Confederate community at its peak as well as the present East Indian landscape. Such a setting provides a superb opportunity to study the transition of cultural landscapes.

The early settlers cleared land and established 16 estates totaling 400 acres. They eventually prospered with the cultivation of sugar which occurred, in part, because of immigration into the settlement of East Indians to work as indentured …

Lumières, Spring 1986, Louisiana State University And Agricultural & Mechanical College

Friends of the LSU Libraries

The bi-annual newsletters from the Friends of the Library contain information about upcoming and recent events, descriptions of new collections, a list of members, and occasional obituaries, which inform members of the news and needs of the LSU Libraries.

Louisiana Agriculture Magazine, Spring 1986, Lsu Agricultural Experiment Station

Louisiana Agriculture

No abstract provided.