Digital Commons Network^™

Cytoskeletal Changes During Adhesion And Release: A Comparison Of Human And Nonhuman Primate Platelets, J. C. Lewis, M. S. White, T. Prater, K. R. Porter, R. J. Steele

Scanning Electron Microscopy

The organization of cytoskeletal proteins in whole-mount adherent platelets from African green monkeys and normal human volunteers has been studied by SEM, high vacuum electron microscopy (HVEM) and conventional (120 kV) electron microscopy. We describe three distinct organizational zones, the Central Matrix, the Trabecular Zone and the Peripheral Web in spread platelets from both sources. The Central Matrix is an ill-defined superstructure of 80-100 Å filaments of short length which enshrouded the granules, dense bodies, mitochondria and elements of the open-channel and dense-tubular systems. The latter, identified through the use of peroxidase cytochemistry with the whole mounts, is an anastomosing …

Assessment Of Fawn Breeding In A South Carolina Deer Herd, Olin E. Rhodes Jr., James M. Novak, Michael H. Smith, Paul E. Johns

Faculty Research & Creative Activity

Annual variation in breeding success among female white-tailed deer (Odocoileus virginianus) fawns on the Savannah River Plant (1967 to 1985) was determined from direct counts of pregnancy in spring-collected fawn females and evidence of lactation and measurements of udder thickness in fall-harvested 1. 5-yearolds. Percent lactation in 1.5-year-old females collected during September and October gave the best estimate of fawn breeding in the previous year. The overall mean fawn breeding estimate from September and October was 41 % , and the yearly variation in fawn breeding was significant. An estimate of the average yearly contribution to recruitment was 43 fetuses …

The Correct Name For Cyperus Cayennensis (C. Flavus), Cyperaceae, Gordon C. Tucker

Faculty Research & Creative Activity

No abstract provided.

In Vitro Effects Of An Extract Of Chara Globularis On The Growth Of Jensen Sarcoma And Normal Rat Kidney Cells, Carl R. Inman

Theses Digitization Project

No abstract provided.

Big Creek And Its Fishes, Joe Tomelleri, Mark E. Eberle, Guy Ernsting

Fort Hays Studies Series

This book is a brief account of Big Creek: the stream, the life, the geology, the history. We hope that it will at least stimulate your appreciation of what Big Creek was and still is. Should you desire to learn more about the topics covered here, publications that served as our sources and those that cover the material in more detail are listed at the end of the book under the titles of the sections in the text.

Plant Breeding For The Home Gardener, Henry R. Owen

Faculty Research & Creative Activity

No abstract provided.

Human And Natural Causes Of Marine Turtle Clutch And Hatchling Mortality And Their Relationship To Hatchling Production On An Important Florida Nesting Beach, Blair E. Witherington

Retrospective Theses and Dissertations

Populations of Western Atlantic loggerheads (Caretta caretta) and Florida green turtles (Chelonia mydas) have been in historical decline. The identification and protection of beaches that are major producers of loggerhead and green turtle hatchlings are vital to the preservation of these species.

A study assessing loggerhead and green turtle hatchling production was initiated at a 21 km stretch of beach in south Brevard County, Florida (Melbourne Beach) during the 1985 nesting season. Nesting densities were assessed from a season-long (10 May – 12 September) census in which every nest was counted and identified to species. An analysis of average reproductive …

Comparative Reproductive Success Of Yellow-Shafted, Red-Shafted, And Hybrid Flickers Across A Hybrid Zone, William S. Moore, Walter D. Koenig

Biological Sciences Faculty Research Publications

Alternative hypotheses of hybrid zones make specific predictions about reproductive components of fitness in the hybrids. The dynamic-equilibrium and reinforcement hypotheses are premised on reduced hybrid fitness, which should be apparent as reduced clutch or brood size or as increased embryonic mortality. The hybrid-superiority and introgression hypotheses predict normal clutch and brood size and embryonic mortality.

Reproductive success was measured at four study sites on a transect across the hybrid zone between the Yellow- (Colaptes auratus auratus) and Red-shafted (C. a. cafer) subspecies of the Northern Flicker. Two additional clutch size samples representing pure Yellow- and …

Passion For Sexual Pleasure, The Measurement Of Selection, And Prospects For Eugenics: Commentary On "Social Versus Reproductive Success" By Daniel Vining, Carl J. Bajema

Other Scholarly Publications

No abstract provided.

Florida Macrolichens As Potential Bioindicators Of Environmental Quality: A Baseline Study, Harry V. Neal

Retrospective Theses and Dissertations

Lichens have been used extensively and with considerable success as bioindicators of atmospheric pollution in North America and Europe for more than thirty years. Little research has followed in tropical and subtropical regions where population growth is rapid and environmental pressures unprecedented. However, taxa used as bioindicators in other studies and/or taxa having this potential, occur naturally in Central Florida. A new potential major source of pollution, the coal-fired Curtis H. Stanton Energy Center, is about to begin operation providing the opportunity to determine the extent of impact. Therefore, lichen monitoring sites have been established and the collection of baseline …

Analysis Of The Df(3r)Ok1, Pamela S. Thomas

Retrospective Theses and Dissertations

No abstract provided.

The Effect Of Sewage Effluent Removal On The Water Quality Of Lake Howell, Florida, Patricia L. Smith

Retrospective Theses and Dissertations

In April, 1983, sewage effluent discharge from the Maitland and Winter Park sewage treatment plants was diverted from Lake Howell to the Iron Bridge Regional Sewage Treatment Plant. The sewage treatment plants of the cities of Winter Park and Maitland had been discharging into Lake Howell since 1927 and 1962, respectively. These point sources had contributed 95% of the total phosphorus and 69% of the total nitrogen budgets for Lake Howell. Physico-chemical parameters were monitored monthly for two years chemical parameters were monitored monthly for two years from January, 1983 through December, 1984. Annual mean values fro chlorophyll_a, …

The Contribution Of The Lymph Hearts In Compensation For Acute Hypovolemic Stress In The Toad Bufo Marinus, Mark Baustian

Dissertations and Theses

Currently published data on the role of the lymphatic system in amphibians are inadequate and contradictory. Estimates of the rate of formation of lymph and the role of the lymph hearts in returning this fluid to the circulation are not based on actual volume determinations but rather estimates derived from changes in hematocrit using published values of plasma and blood volume. The lymph hearts are known to be vital to the maintenance of normal fluid compartment physiology and to increase their rate of activity during episodes of hypovolemic stress. Yet, significant redistribution of body fluids following hemorrage appears to occur …

On The Phylogenetic Relationships Among Paenungulata And Within Elephantidae As Demonstrated By Molecular And Osteological Evidence, Jeheskel Shoshani

Wayne State University Dissertations

Paenungulata (=PAEN). A total of 182 non-dental morphological characters from 100 species (79 extant, 21 extinct; 98 mammals and 2 non-mammals) was analyzed by two maximum parsimony tree building algorithms. Parallel analyses of 2,258 pairwise immunodiffusion (IMDFN) comparisons with 16 chicken antisera on 101 mammalian species (representing 22 taxa) and of amino acid sequence data of alpha and beta hemoglobins and other published protein sequences were also conducted. Morphological and molecular results agree that Eutheria consists of five major clades and that rates of evolution are similar in the two approaches. Following are close relationships based on osteological results: (1) …

The Effect Of Food On Reproduction In The Sailfin Molly, Poecilia Iatipinna (Poeciliidae, Rebecca B. Smith

Retrospective Theses and Dissertations

Sailfin molly populations often experience a midsummer slump in reproduction, and it has been suggested that this slump is caused by food shortage. A food supplementation experiment on a natural population of mollies was done in 1983. Excess food did not directly affect the fecundity of females in the field. A laboratory experiment was designed to determine the food level on reproduction in females. Ration had the greatest effect on somatic condition and growth, indirectly influencing fecundity. Two explanations for this strategy are suggested. A significant difference in brood size and size of young was observed between the field and …

A Demographic Study Of An Isolated Population Of The Gopher Tortoise, Gopherus Polyphemus; And An Assessment Of A Relocation Procedure For Tortoises, Terry J. Doonan

Retrospective Theses and Dissertations

It is acknowledged that the gopher tortoise is declining in numbers throughout its geographic range primarily from degradation and loss of suitable habitat. This research project is part of a pilot program to study the effectiveness of relocation as a mitigation method for the conservation of gopher tortoises. There was an opportunity to gather information about the tortoise population prior to its relocation, and for that reason this thesis is presented in two sections.

The first section of this work involved the analysis of the tortoise population prior to its removal from the development site. Results of two methods for …

Evolution And Reproductive Biology Of Inflorescences In Lithocarpus, Castanopsis, Castanea, And Quercus (Fagaceae), Robert B. Kaul

School of Biological Sciences: Faculty Publications

Of Lithocarpus, Castanopsis, Castanea, and Quercus, only Lithocarpus frequently bears branched spikes suggestive of the primitive condition in the Fagaceae; the other genera sometimes have them in some individuals. Simple and branched spikes can occur on the same tree. Evolution of the simple spike is interpreted as the loss of branching capacity in the branched spikes. The Fagaceae show various transitional stages from perfect, entomophilous to imperfect, anemophilous flowers and from mixed-sex to unisexual spikes. Complete separation of staminate from pistillate function into separate spikes and catkins occurs only in Quercus, which is also the only …

Arthropod Species Diversity, Composition And Trophic Structure At The Soil Level Biotope Of Three Northeastern Illinois Prairie Remnants, With Botanical Characterization For Each Site, Dean George Stathakis

Master's Theses

No abstract provided.

Metabolism Of N⁶- Δ ²-Isopentenyladenine In Saccharomyces Cerevisiae, Kast Carol Anne Van

Master's Theses

No abstract provided.

Influences Of Captivity On Gorilla And Orang-Utan Behavior, Coquette Elliott

Master's Theses

No abstract provided.

The Effects Of Adrenalectomy On The Onset Of Puberty In The Female Golden Hamster, Gina Micaletti

Master's Theses

No abstract provided.

Polymorphic Arrangement Of 5s Dna Orphons In Xenopus Laevis, Brenda A. Peculis

Master's Theses

No abstract provided.

An Analysis Of Factors Affecting The Status Of Evolution As A Topic In Iowa High School Biology Classrooms, Heidi Ann Andre

Dissertations and Theses @ UNI

This study was designed to determine the status of evolution as a topic in Iowa high school biology classrooms. The extent of its coverage, as well as the type of understanding exhibited by the teacher, was viewed in light of the teachers' religious background, community opinion and college training. Two survey instruments were utilized to gather data. Instrument One was designed to quantitatively examine the structure of Iowa high school biology classes, textbooks used and the educational background of the teachers. Instrument Two was constructed to analyze Iowa biology teachers' self-perceived religious and scientific backgrounds relative to their treatment of …

Quantitation And Identification Of Organic N-Chloramines Formed In Stomach Fluid On Ingestion Of Aqueous Hypochlorite, Frank E. Scully Jr., Katherine Mazina, Daniel E. Sonenshine, Frederick Kopfler

Biological Sciences Faculty Publications

The chemical reactions that hypochlorite undergoes in the body when chlorinated water is ingested have received very little attention. Because amino nitrogen compounds are important components of the average diet, the reactions of hypochlorite with amino compounds in the stomach were investigated. Stomach fluid was recovered from Sprague-Dawley rats that had been fasted for 48 hr and administered 4 mL deionized water. The chlorine demand of the stomach fluid was determined. An average volume-independent demand of 2.7 mg chlorine was measured. At doses below 40 mg/L chlorine reducing reactions appeared to account for reduction of all oxidizing species within 15 …

Reproductive Strategies Of Meadow Voles, Hispid Cotton Rats, And Eastern Harvest Mice In Virginia, Robert K. Rose

Biological Sciences Faculty Publications

Patterns of reproduction in small mammals in Virginia were examined by autopsying samples of meadow voles (Microtus pennsylvanicus) collected for 23 months near Charlottesville, of hispid cotton rats (Sigmodon hispidus) collected for 14 months in Portsmouth, and by evaluating live-caught eastern harvest mice (Reithrodontomys humulis) trapped for 15 months in Suffolk and for 12 months in Chesapeake. The meadow vole, a microtine rodent with a north temperate and sub-arctic distribution throughout North America, suspended breeding during the winter of peak density but not of declining density. High metabolic rates and other adaptations for winter …

Biochemical Variation Of The Desert Tortoise, Gopherus Agassizi, Randy Dean Jennings

Biology ETDs

Relationships among populations of the desert tortoise, Gopherus agassizi, were assessed using starch-gel electrophoresis. Concurrently, tortoises obtained for the electrophoretic study were used in a preliminary morphological analysis. Morphologically, males differed from females in the gular shape and anal scutes, front foot width, carapacial doming, and the posterior curvature of the carapace. Only anal notch depth differed among habitats for female tortoises, while differences in gular length, front foot width, anal notch depth and width, and carapacial flatness were detected among males. Differences in foot and gular shape may reflect their importance in male:male agonistic encounters. Shell shape differences between …

Long Term Effects Of Radiation And Combined Modalities On Mouse Lung, David P. Penney, Paul Van Houtte, Dietmar W. Siemann, Wayne A. Rosenkrans Jr., Philip Rubin, Robert A. Cooper Jr.

Scanning Electron Microscopy

The lung appears to be the major dose-limiting organ in radiation of the thorax. Early responses (<1 week) involve the type II pneumocyte and increased surfactant biosynthesis and secretion. Later changes, which appear to be related to the surfactant response, lead to classical radiation pneumonitis, which is often fatal. Animals which survive radiation pneumonitis develop progressive fibrosis, a late-appearing response, which reduces compliance and available air space, and is usually fatal. This study centers on the fine structural changes in the lungs of LAF₁ mice, 63 weeks following various radiation exposures (5-13 Gy). Doses which are subthreshold in evoking surfactant and pneumonitic responses precipitate fibrosis and atelectasis by 63 weeks, and involve type II pneumocyte sloughing and degeneration. Of the two major deterrents to lung irradiation (pneumonitis and fibrosis), these results suggest that fibrosis always follows pneumonitis, but pneumonitis is not a necessary preliminary step to fibrosis. Bleomycin elicits several morphological alterations characteristic of radiation, and, when combined with the latter, appears to exacerbate radiation effects.

Seasonal Variation In Population Location Of The Galapagos Tortoise, Geochelone Elephantopus Vandenburghi, On Volcan Alcedo, Isabela Island, Galapagos Archipelago, Kent R. Beaman

Loma Linda University Electronic Theses, Dissertations & Projects

Twenty tortoises, 10 adult males and 10 adult females, were tagged with radio transmitters. Numbers were painted on each carapace to aid in visual sighting. The tortoises were released, and their movement was monitored over a one year period.

The percent recovery of tagged tortoises along with the numbers of non-tagged tortoises counted in sections of the study area, were used to determine tortoise population movement and location.

Weather data were collected and observations were made concerning the vegetation. These observations were compared with those from previous studies to see what impact seasonal climatic conditions and food availability had on …

Sexual Selection In Lekking Sage Grouse: Phenotypic Correlates Of Male Mating Success, Robert M. Gibson, Jack W. Bradbury

School of Biological Sciences: Faculty Publications

Mate choice cues in sage grouse were reinvestigated by analyzing relationships between male mating success and a range of suggested cues. Display cues were implicated by significant relationships between mating status (whether or not a male mated) and lek attendance, display rate (corrected for effects of female proximity and time of day) and an acoustic component related to temporal and frequency measures of a whistle emitted during the strut display. Although display rate and the acoustic component were intercorrelated, both exerted significant partial effects on mating success in multivariate analyses. These display measures also differed significantly between males. In contrast, …

Sea Urchins From The Brazos Santiago Pass Jetty, South Padre Island, Richard R. Fairchild, Lazern O. Sorensen

School of Integrative Biological & Chemical Sciences (Formerly Dept. of Biology)

Data on occurrence and distribution of sea urchins (Echinoidea) are presented for the Brazos Santiago Pass jetty on South Padre Island, Texas. Echinometra lucunter is recorded from the Texas coast.