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Dispersion And Physiological Ecology Of Mosquito Adults In Louisiana Ricelands., Alan Richard Holck

LSU Historical Dissertations and Theses

A sampling technique for estimating the size of adult mosquito populations in vegetation was developed. Regression analysis was used to obtain absolute density estimates from sweep net. Diurnal population size estimates of Louisiana riceland mosquitoes were made on a 35.6-square km site 5 km south of Kaplan, LA. Four mosquito species were present: Psorophora columbiae, Anopheles quadrimaculatus, An. crucians and Culex salinarius. Mosquito species were highly stratified in their distribution. Psorophora columbiae was primarily observed in pastures with livestock and in rice fields. Both Anophelines were found only in structures. Culex salinarius did not exhibit habitat preference. Anopheles quadrimaculatus exhibited …

Ecological Studies Of Velvetbean Caterpillar, Anticarsia Gemmatalis Hubner, Pupae In Louisiana Soybean Fields., Joon-Ho Lee

LSU Historical Dissertations and Theses

The microhabitat distribution of velvetbean caterpillar (VBC), Anticarsia gemmatalis Hubner (Lepidoptera: Noctuidae) was studied in soybean field cages and fields during 1985, 1986 and 1987. Larval density did not affect pupal horizontal distribution patterns related to direction and distance from the plant row. Pupae were found equally on both sides of soybean plant rows in a cage study. Pupae were found on and below the soil surface, but not on the plant. In 51 cm row spacing, both equal number and similar dispersion pattern of pupae were found on either side of the plant row. In 91 cm row spacing, …

The Effects Of Fire On Forest Community Composition, Structure, And Pattern In Florida Sandhills., Alan John Rebertus

LSU Historical Dissertations and Theses

The influence of fire on turkey oak (Quercus laevis Walt.) and sand live oak (Q. geminata Small) populations was examined in experimental fires in sandhills near Tampa. Turkey oak crown survival was positively related to oak dbh, distance to the nearest longleaf pine (Pinus palustris Mill.), and dbh of the nearest pine. The pyrogenic litter of pines adversely affected survival of small turkey oaks within 10-20 m of the nearest pine, depending on fire severity. Resprouting of crown-killed turkey oaks was inversely related to oak dbh and, in one field, distance to the nearest pine. Poor resprouting away from pines …

Rice Stink Bug, Oebalus Pugnax (F.), On Rice: Evaluation For Plant Resistance, Interaction Of Field Fungi With Feeding Damage, And Evaluation Of Insecticides For Control., Marieanne Eva Hollay

LSU Historical Dissertations and Theses

Feeding punctures of the rice stink bug (RSB), Oebalus pugnax (F.), provide fungi entry sites into rice, Oryza sativa (L.), grains and kernels (hulled grains). Feeding sheaths also serve as a source of nutrients for fungi. Grain spotting fungi did not affect the percentage of spotted kernels (pecky rice) and significantly reduced full grain weight only at low infestation rates of one and two RSB per panicle. Panicles had been treated with a single application of propriconazol (1000 ppm) soon after flowering and later infested in the early milk stage with RSB adult pairs for 9 days. Propriconazol was not …

Biology And Management Of White Spruce Seed Crops Reforestation In Subarctic Taiga Forests, J. Alden

Bulletin

Seed production is the most dramatic event in the life cycle of trees and is the first step in forest regeneration. Embryos of white spruce are fragile during germination, and they depend on vigorous seeds for survival and growth. Mortality of white spruce seeds and seedlings is high in northern forests because climate and microhabitat are often unfavorable for seed germination and seedling establishment. Large quantities of high-quality seed are required for natural and artificial regeneration of white spruce forests at high latitudes. The first chapter of this bulletin describes the reproductive process of white spruce and factors that affect …

The Population Ecology And Nutrient Transport Of Gulf Menhaden In Fourleague Bay, Louisiana (Mortality, Growth, Feeding, Production, Migration)., Linda Ann Deegan

LSU Historical Dissertations and Theses

An ecological study of the young-of-the-year of three year-classes of gulf menhaden (Brevoortia patronus) was conducted from July 1981 to December 1983 in Fourleague Bay, Louisiana. This study documented gulf menhaden population ecology and the importance of gulf menhaden in the nutrient and energy balance of estuaries. Young-of-the-year gulf menhaden immigrated in winter and moved to tidal creeks and ponds, where they remained until midsummer. They then moved into open bays, where they remained until the fall. This migration pattern coincides with sequentially available, but spatially separate, productivity peaks in marsh and open bays. In the fall, they emigrated to …

Seedling Johnsongrass Growth In Sugarcane As Affected By Time Of Emergence (Agroecology, Sorha, Weed Potential)., Joseph Floyd Yoder Iii

LSU Historical Dissertations and Theses

Field studies were conducted to document seedling johnsongrass Sorghum halepense (L.) Pers. growth as influenced by date of emergence in sugarcane (Saccharum interspecific hybrids, cultivar 'CP 65-357'). The crop was in the plant cane year of growth in 1982 and 1983, and the first stubble year in 1984. The experiments were randomized complete block designs. Johnsongrass seedling emergence days were approximately three weeks apart, from April or early May through mid-July for a total of five emergence days each year. There were 36, 60, and 72 replicates for emergence days numbered 1 to 3, 4, and 5, respectively, over three …

Systematics, Redescription, And Geographic Variation Of The Blackside Darter, Percina Maculata (Pisces; Percidae)., Eugene Clifton Beckham Iii

LSU Historical Dissertations and Theses

A systematic study of the North American percid fish Percina (Alvordius) maculata (Girard) was undertaken to determine the extent and pattern of geographic variation, subspeciation, and sexual dimorphism. A brief nomenclatorial history is presented, the species is redescribed, and variation, distribution, habitat, and subgeneric relationships are discussed. Other than dorsal fin pigmentation, absence of modified midventral scales in females, and limited intrapopulational sexual dimorphism in a few morphometric characters, no variation in most of the thirty-nine characters examined is present between males and females. Morphometrics exhibited no pattern of geographic variation; however, meristic characters revealed a major trend in geographic …

Effects Of Burning On Soil Algae In A Restored Tallgrass Prairie., Sandra Lou Kragskow

Student Work

Introduction: Algae are present in almost every soil throughout the world, with the Chlorophytes and Cyanophytes the most common (Bold, 1970). Algal abundance and diversity in any particular soil seems to be dependent on, and respond to, changes in light, moisture, pH, and nutrients and substrate (Shields and Durrell, 1964).

A Bibliography Of Varietal Resistance To The Rice Gall Midge, Orseolia Oryzae (Wood-Mason), P. K. Pathak, E. A. Heinrichs

Department of Entomology: Faculty Publications

This bibliography contains 330 published and unpublished references for the period 1881-1981. References are arranged alphabetically by author and are also classified by country and by subjects (mass rearing, screening, evaluation and utilization of resistant varieties, breeding for and inheritance of resistance, and biotype variation). Tables list resistant varieties identified, varietal sources used in breeding programs, varieties which have been released for cultivation by farmers and biotype classification.

Native Tallgrass Prairie Remnants Of Eastern Nebraska: Floristics And Effects Of Management, Topography, Size, And Season Of Evaluation., Judith F. Boettcher

Student Work

Ten eastern Nebraska tallgrass prairie remnants, varying in size from 1-18 ha, were evaluated for floristic composition at four times during the 1979 growing season. A total of 153 species were recorded of which seven dominated: Andropogon gerardii, A. scoparius, Bromus inermis, Ceanothus americanus, Heliopsis helianthodies, Poa pratensis, and Stipa spartea. Floristic composition, however, varied with respect to management, topography, season of evaluation, and prairie size. Frequent mowing reduced canopy cover of native species, such as Andropogon gerardii, by 21% while increasing that of non-native species, such as Bromus inermis, by 35%. In addition, frequently mowed sites contained a greater …

Timing Of Burning And Mowing Management Of A Bluestem Prairie In Eastern Nebraska., Edward I. Hover

Student Work

This study evaluates the effects of time of mowing on species composition and inflorescence phenology in a bluestem prairie and contrast mowing and burning treatments. Treatment areas in a native prairie, with a history of summer mowing, were burned and mowed in April and evaluated in June and August of the same year. While reflecting only a single year’s treatment, the study indicated that summer mowing favors cool season grasses, such as porcupinegrass (Stipa spartea), and selects against warm season grasses such as big bluestem (Andropogon gerardii). Canopy coverage, biomass, and flowering stem numbers and height of porcupinegrass was consistently …

A Systematic Analysis Of The Endemic Avifauna Of The Hawaiian Islands., Harold Douglas Pratt Jr

LSU Historical Dissertations and Theses

No abstract provided.

A History Of Biology On The Campus Of Eastern Kentucky University: 1874-1974, H. H. Lafuze

Books

This is an account of the origin and development of biological science on the campus of Eastern Kentucky University on the eve of the one-hundredth anniversary of the founding of the campus and Central University. This history is written from the point of view of a faculty member who had also served as a departmental chairman for a number of years.

Studies On The Parasites Of Smooth Flounder Liopsetta Putnami (Gill) In The Great Bay Estuary, New Hampshire, Peter R. Burn

Doctoral Dissertations

No abstract provided.

Studies On The Population Biology, Host-Parasite Relationships, And Community Diversity Of Several Endohelminths Infecting The White Sucker, Catostomus Commersoni (Lacepede), From The Bellamy And Oyster Rivers, New Hampshire, Patrick Murray Muzzall

Doctoral Dissertations

No abstract provided.

Ecological Studies On The Sand Beach Amphipod Amphiporeia Virginiana Shoemaker, 1933 (Crustacea: Haustoriidae), Richard Perry Hager

Doctoral Dissertations

No abstract provided.

Grassland Reestablishment Under Burning And Mowing Management In Eastern Nebraska., James N. Becic

Student Work

Bluestem prairie (Adriopogon Panicum Sorghastrum) (Kuchler 1964) once covered much of eastern Nebraska (Weaver 1954, Weaver and Albertson 1956, Costello 1969) but extensive cultivation since the mid-1800’s has eliminated most of these native Prairie stands. Four types of management have been widely used in managing remaining native bluestem Prairie ranges; these include burning, mowing for hay, raising, and prevention of burning, mowing, or grazing. Historically, burning of bluestem Prairie occurred frequently in both spring and fall and was initiated by lightning and native-American Indians (Catlin 1848, Komarek 1964, 1966, Anderson 1972); grazing by large herbivores was extensive but probably less …

Ecological Study Of The Salt Marsh Ecad Scorpioides (Hornemann) Hauck Of Ascophyllum Nodosum (L) Le Jolis, Jan Sun-Lum Chock

Doctoral Dissertations

No abstract provided.

The Biology Of The Predatory Calanoid Copepod Tortanus Discaudatus (Thompson And Scott) In A New Hampshire Estuary, David George Phillips

Doctoral Dissertations

No abstract provided.

An Ecological Study Of Fucus Spiralis Linnaeus, Richard Albert Niemeck

Doctoral Dissertations

No abstract provided.

The Birds Of Balta, A Peruvian Dry Tropical Forest Locality, With An Analysis Of Their Origins And Ecological Relationships., John Patton O'Neill

LSU Historical Dissertations and Theses

No abstract provided.

Host Plant Resistance And Ecological Studies On The Rice Stink Bug Oebalus Pugnax (Fabricius)., Shashank Shivaling Nilakhe

LSU Historical Dissertations and Theses

No abstract provided.

Description Of Immature Stages Of Philolithus Densicollis And Stenomorpha Puncticollis With Notes On Their Biology (Coleoptera, Tenebrionidae, Tentyriinae), Kirby W. Brown

Postilla

Mature larvae of the tribe Asidini are characterized by an unsclerotized body, dorsally concave mandibles with preapical gibbosity and submarginal setose area, granulate cranium, swollen preepipleurum, and huge granulate forelegs with contiguous coxae surrounded by an enlarged sternellum. The pygidial terminus is rounded in Philolithus densicollis (Horn) and bifurcate in Stenomorpha puncticollis (LeConte). First-instar larvae lack granules on cranium and forelegs, have 2 setae on the labrum, possess egg bursters, and are very similar in both species. Eggs are large, averaging 2.5 mm in length in P. densicollis and 3.1 mm in S. puncticollis. Pupae are not known. The two …

Food Habits, Vocalizations, And Territoriality Of Alaskan Red Squirrels (G. Tamiasciurus), Frances Ann Nodler

Theses (Unassigned)

No abstract provided.

Physiological Ecology Of Four Species Of Polysiphonia, Richard A. Fralick

Doctoral Dissertations

No abstract provided.

The Lichen Genus Ramalina In The Gulf South Region Of The United States., Raymond Eugene Jones

LSU Historical Dissertations and Theses

No abstract provided.

Aspects Of The Physiology And Diseases Of The North American Elk, Yvonne Bernard Weber

Dissertations and Theses

Several aspects of the physiology and diseases of the North American elk (Cervus canadensis) were investigated, toward the goal of uncovering influences responsible for declining productivity among some elk herds in Oregon.

A newly developed drug, Etorphine, together with its antagonistic companion, Dip renorphine, was used to immobilize elk. Substantial differences were found in the amounts required and animal responses dependent upon age, physical condition and life history.

Whole blood samples were obtained from 60 living elk for hematological studies. The parameters examined included hemoglobin levels, packed cell volume, erythrocyte and leukocyte counts, mean corpuscular hemoglobin, mean corpuscular hemoglobin concentration, …

An Autecological Study Of The Marine Red Alga Gigartina Stellata (Stackhouse) Batters, Richard L. Burns

Doctoral Dissertations

No abstract provided.

Some Factors Affecting The Concentration And Properties Of Carrageenan In Chondrus Crispus, Stackhouse, Stephen William Fuller

Doctoral Dissertations

No abstract provided.