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Mirid Fauna Associated With Old-Field Goldenrods (Solidago: Compositae) In Ithaca, N.Y., Frank J. Messina

Biology Faculty Publications

The mirid fauna associated with oldfield goldenrods (Solidago spp.) was sampled from May 10-Oct. 25, 1977 in Ithaca, New York USA . Species (23) belonging to 16 genera were recorded; 97% of all individuals (1099) belong to 6 genera (Lygus, Slaterocoris, Lopidea, Plagiognathus, Adelphocoris and Polymerus). The tarnished plant bug, Lygus lineolaris, was the most common species. The dominant mirids can be divided into 2 fairly distinct guilds, L. lineolaris, 2 Plagiognathus spp. and A. rapidus feeding primarily on goldenrod flowers and 3 Slaterocoris spp., Lopidea media and Polymerus venaticus feeding on the immature foliage. The phenological pattern exhibited by …

The Effects Of Linear Alkyl Benzene Sulfonate On The Incorporation Of Radioactive Uridine Into High Polymer Rna During The Early Development Of The Fathead Minnow (Pimephales Promelas Rafinesque), James P. Hardwick

Master's Theses

No abstract provided.

Effect Of Dopamine And Dietary Sodium Deficiency On In Vitro Renin Release And Cyclic 3 ́5 ́-Adenosine Monophosphate Content In Male Rat Kidney Slices: Modification By Dopaminergic-Receptor Agonistic And Antagonistic Agents, Victor Allyn Aletich

Master's Theses

No abstract provided.

Susceptibility Of Different Embryonic Stages Of The Fathead Minnow, Pimephales Promelas (Rafinnesque), To Linear Alkyl Sulfonate Toxicity, Don L. Thompson

Master's Theses

No abstract provided.

The Non-Teratogenic Effects In Mice Progeny By Maternal Treatment With Amygdalin, Victoria Ann Rowe

Master's Theses

No abstract provided.

Temporal And Depth Stress Dynamics Of Lake Diatom Communities On Glass Substrates, Gregg A. Cunningham

Dissertations and Theses @ UNI

Diatom communities were studied that became attached to glass slides suspended at 1 m and 7 m depths in Lake West Okoboji, Iowa during an eight week period in the summer of 1974. Each community was analyzed at two week intervals for colonization, succession, and alternating depth stress manipulation (transfer) responses, Colonization communities were obtained from a series of slides exposed at each depth for each two week interval. Succession communities consisted of a slide series acquired from each depth with exposure times of from two to eight weeks, Diatom communities on a series of slides from each level were …

Small Mammal Dissemination Of Dwarf Mistletoe Seeds, Daniel Eugene Lemons

Dissertations and Theses

No study has been done in the western United States concerning dispersal of dwarf mistletoe by mammals. At the outset of the study it was determined that the red squirrel, the yellow pine chipmunk (Eutamias amoenus), the northern flying squirrel, and the bushy-tailed wood rat (Neotaoma cinerea), were all potential vectors of seeds. The red squirrel was chosen as the main object of study because it is diurnal and is closely associated with ponderosa pine (Pinus ponderosa), a heavily infected species. The study was undertaken to determine whether small mammals play a significant role in transporting mistletoe seeds to uninfected …

Iowa Environmental Education Needs Assessment: An Evaluation By Teachers And Administrators In Grades K-12, Debra Elaine Mcrae

Dissertations and Theses @ UNI

An environmental education needs assessment of the Iowa public schools (K-12) was conducted during the spring of 1976. The assessment was conducted via mailed questionnaire to a randomly selected sample of 2128 teachers, principals and superintendents. The proportionately stratified sample was divided into eight sub-groups1 elementary teachers, elementary principals, secondary science teachers, secondary social science teachers, secondary other teachers (all other types of secondary teachers), secondary principals, superintendents and other administrators. The response rate was 53.8 percent. Responses were made on modified Likert scales. Statistical Package for the Social Sciences was used for data recording and computer analysis. Information obtained …

The Use Of Track Autoradiography To Determine Species-Specific Phytoplankton Productivity, Ralph Martin Vaga

Dissertations and Theses

Methods of measuring primary productivity are discussed in terms of what information they provide concerning energy flow in the phytoplankton community. A track autoradiographic technique is presented which measures species-specific phytoplankton productivity and its use is demonstrated under laboratory conditions. Controls and standardized processing conditions are established which permit the use of the track technique in quantitative evaluations of primary productivity.

Genetic Transformation Among Azotobacter Species, Wayne H. Voth

Dissertations and Theses

Previous methods for genetic transformation in Azotobacter vinelandii have employed poorly defined genetic markers or crude DNA extracts. An improved transformation technique has been developed for use in Azotobacter. The technique was used to transform several strains of Azotobacter with DNA carrying a defined genetic marker. A method for isolating pure, high molecular weight, biologically active DNA from Azotobacter is also presented. Purity of the extracted DNA was determined by standard chemical assays. The molecular weight was determined by boundary sedimentation techniques to be 18.2 megadaltons. DNA was obtained from several mutant strains of Azotobacter. Biological activity of these samples …

Ecological Comparison Of Sigmodon Hispidus And Sigmodon Fulviventer In The Rio Grande Valley, New Mexico, Karen Petersen

Biology ETDs

This study evaluates the potential for competitive interactions between two species of cotton rat along the Rio Grande valley in New Mexico. Field work was carried out on Sigmodon hispidus and S. fulviventer from April, 1976 to August, 1976, at six study sites. Field data gathered included number of juveniles, number of pregnant females and vegetation diversity. Further studies included morphological analysis of museum specimens and a behavioral study of animals brought back to the laboratory.

Population parameters were compared across the study sites for the cotton rats. Neither species has a sex ratio significantly different from 50:50, but the …

Factors Affecting Mating Duration In The Walkingstick Diapheromera Velii (Walsh) (Phasmatodea: Heteronemiidae), John M. Sivinski

Biology ETDs

Mating durations have only recently become the object of detailed research. The stick insect Diapheromera velii mates from 3 to 136 hours, during which time the genitalia are often not inserted, and contact is maintained by a male clasping organ. Prolonged attachment of male D. velii in the absence of copulation is best explained as guarding that assures the efficiency of previously transferred ejaculates by avoiding sperm competition. Oviposition patterns in D. velii are relatively continuous when compared to those of many insects. The result is that female value to males is comparatively constant as well. The amount of time …

The Effects Of Salts And Metals On Germination And Emergence Of Atriplex Canescens (Pursh.) Nutt. And Sporobolus Airoides Torr, Robert L. Edgar

Biology ETDs

Laboratory studies were conducted to determine effects of salts, metals, and their interactions on the germination and emergence of fourwing saltbush [Atriplex canescens (Pursh.) Nutt.] and alkali sacaton (Sporobolus airoides Torr.). These studies, coupled with soil evaluations, should allow one to predict and possibly alleviate germination and emergence inhibition of these two species due to excessive soil salts and metals. Fourwing saltbush germination and emergence is significantly greater with osmotic stress < -3 bars imposed by inorganic salts (NaCl, Na₂SO₄, MgCl₂, MgSO₄, or CaCl₂) than by polyethylene glycol (PEG) (P < .05). Alkali sacaton germination and emergence is significantly better with osmotic stress < -3 bars imposed by NaCl, Na₂SO₄, or CaCl₂ than by …

Laboratory Comparisons Of Two Species Of Liquidambar, Lynn Wellman

Masters Theses & Specialist Projects

Laboratory germinated seedlings of Liquidambar styraciflua L., sweet gum, from Barren County, Kentucky, subjected to a flooding or inundation test were shown to respond in significantly different ways than did the controls. Plants with root systems standing in water showed a much shorter period of non-dormancy than plants that were not subjected to submergence when both were grown under long day, warm temperature conditions in growth chambers. There was no evidence of transfer of a growth retardant or dormin-like compound in water transferred from plants grown under short day (long night) conditions to plants with roots submerged under long day …

Origins Of Biological Thought, John B. Jenkins

Biology Faculty Works

No abstract provided.

The Biology Of Coprinus Radians, Ozonium, Oidium, And Their Interrelationships, Thomas J. Fahey

All-Inclusive List of Electronic Theses and Dissertations

The pleomorphism of Coprinus radians was studied. The three distinct growth forms--sporophore, oidial stage, and ozonium stage--were examined in relation to ultrastructure, morphology and development. Scanning and transmission electron microscopy are correlated with photomicrographs of developmental stages. Development of the oidia and of the sporophore are of particular interest. The multinucleate oidia develop quite differently from oidia as generally described for Basidiomycete imperfect stages. Development of the oidia of this Coprinus is holoblastic and sympodial. The mushroom primordia are differentiated internally into gill, cap, and stipe hyphae while only l-2mm in diameter. At this stage they look superficially like sclerotial …

Effects Of Anticonvulsant Drugs On The Morphological And Neurophysiological Aspects Of An Experimental Model Of Epilepsy, Linda D. Compton

Masters Theses

No abstract provided.

Application Of The Nutrient Loading Concept To Lake Powell, The Effects Of Nutrient Perturbations On Phytoplankton Productivity, And Levels Of Nitrogen And Phosphorus In The Reservoir, Steven Paul Gloss

Biology ETDs

Levels, sources, and biological influence of nitrogen and phosphorus in Lake Powell, Utah-Arizona were examined. The reservoir, one of the three largest in the United States, is a mainstream impoundment on the Colorado River and is classified as a warm monomictic with meromixis exhibited in deeper waters.

Nutrient concentrations in the reservoir were characteristic of a mesotrophic lake. Mean total phosphorus concentration was 17 mg m^-3 during the study, while total nitrogen averaged 531 mg m^-3. Nitrate was the dominant form of nitrogen. Distribution of both nutrients exhibited patterns previously described for lakes to some extent, but …

A Flora Of The San Andres National Wildlife Refuge, Dona Ana County, New Mexico, James Duwayne Von Loh

Biology ETDs

The San Andres Mountains are a unique range. Their narrowness and relatively small mass create environmental conditions that allow elements of the Chihuahuan Desert flora, Upper Sonoran Desert flora, and representatives of the southern Rocky Mountain flora to intermingle, forming an extremely diverse, mosaic pattern of dispersal. San Andres National Wildlife Refuge was studied floristically during the 1975 growing season. It is represented by 923 known species of vascular plants from four distinct topographical areas that span a 4000 to 8200 foot elevational range. The study resulted in 1422 collections from the San Andres Mountains. Specimens from the Refuge area …

An Evaluation Of Narrow Hybrid Zones In Vertebrates, William S. Moore

Biological Sciences Faculty Research Publications

A review of the literature on vertebrate hybridization reveals the existence of a number of narrow hybrid zones. Three hypotheses have been suggested to explain the occurrence of these zones. The ephemeral-zone hypothesis states that hybridization will end either in speciation or fusion of the hybridizing taxa by means of introgression. The dynamic-equilibrium hypothesis allows the possibility that narrow hybrid zones might be stable: where hybrids are confined to a small area by steep selection gradients, "crystallization" of an antihybridization mechanism might be prevented by naive immigrants from the parental populations even though hybrids are selected against. The hybrid-superiority hypothesis …

Review Of "History Of The Life Sciences. An Annotated Bibliography" By P. Smit, John B. Jenkins

Biology Faculty Works

No abstract provided.

Modern Invertebrate Footprints Compared With Fossil Footprints From The Coconino Sandstone (Permian), Marilyn A. Emtage

Loma Linda University Electronic Theses, Dissertations & Projects

Laboratory studies of trackways of the crayfish, Cambarus clarkii were conducted, and the footprints compared with fossil invertebrate footprints (Paleohelcura sp.) of the Permian Coconino sandstone of Northern Arizona, and similar footprints of other sandstone. Fine grained sand (similar to that composing the Coconino sandstone) was placed in a plexiglass tank to form slopes of various angles. The crayfish walked up and down slopes of 10°± 3°, 20°± 2°, 25° and on level sand, and their trackways were photographed. Trackways were produced on wet sand and underwater sand, but the animals would not walk on dry sand. Clear individual impressions …

Contractile Properties Of Rat Soleus Muscle: Effects Of Training And Fatigue, Robert H. Fitts, J. O. Holloszy

Biological Sciences Faculty Research and Publications

The effects of exercise training and fatigue on the contractile properties of rat soleus muscles have been investigated. Prolonged exercise, consisting of 2 h or daily treadmill running, induced small but significant decrease in contraction time, one-half relaxation time, and maximum tetanic tension (Po), and increase in the peak rate of tension development (dP/dt) during a twitch, and an increase in maximum shortening velocity (Vmax). The 20% increase in Vmax was proportional to the previously reported increase in actomyosin ATPase induced by 2 h of daily running. These results indicate that prolonged training can induce modifications of the neurally determined …

Megafossil Orientation Of Selected Silurian, Devonian, And Pleistocene Reefs Of North America, Lance T. Hodges

Loma Linda University Electronic Theses, Dissertations & Projects

The definition and identification of fossil reefs has been a continually vexing problem for paleoecologists. One approach to this problem is a study of fossil orientation in "reef" strata. Orientation of corals in exposures of reef limestones has been mentioned in the literature, but usually in a brief, non-quantitative way. Eight study sites were used to investigate the nature of structures described as reef-related. Two sites were selected from the Pleistocene Key Largo Limestone of Florida, probably a backreef facies. The Florida sites were used as fossil reef reference sites, because of their close relationship to modern Florida reefs. The …

Distribution And Behavior Study Of Diurnal Tree Squirrels In Portland, Oregon, With Emphasis On The Western Gray Squirrel (Sciurus Griseus Griseus Ord) And The Western Fox Squirrel (S. Niger Rufiventer E. Geoffroy St.-Hilaire), Ira Young Rice Iii

Dissertations and Theses

Populations of diurnal tree squirrels in the Portland area were located by mail surveys, personal interviews, and field inspections. Pine squirrels were found to reside in thickly wooded residential areas with dense understories and running water nearby. Western gray squirrels occupied habitats in relatively quiet residential neighborhoods, in areas well supplied with mast crops. Western fox squirrels were found to coexist with gray squirrels in their preferred habitat, and also to thrive in park settings with few mast trees and high activity and noise levels. In areas occupied by both fox and gray squirrels, dominant-subordinate relationships were noted. Each species …

Seasonal Abundance & Diversity Of Fishes At Three Stations On The Middle Fork Of Drake's Creek, Warren & Allen Counties, Kentucky, David Bell

Masters Theses & Specialist Projects

A total of 7,485 fish, representing 49 species, 25 genera, and 11 families, were electroshocked from three stations on the Middle Fork of Drake's Creek during the period January, 1972 through January, 1973. Community structure was influenced by seasonal changes in both numbers of species and numbers of individuals. The number of species per collection was at its highest, at all stations, during the month of September. The total number of species and individuals collected at each station progressively increased toward the upstream areas. Eleven of the forty-nine species collected during the course of the study provided 91.8% of the …

The Germination Requirements Of Certain Species Of Arid Land Plants, David George Sabo

Biology ETDs

The species of shrubs and nine species of grasses were proposed as candidates for investigations for their germination parameters and suitability in stripmine recovery by the US Forest Service, Rocky Mountain Forest and Range Experiment Station. Species which were considered as possible candidates for stripmine recovery area: Artemisia frigida, estafiata; Artemisia tridentate, big sagebrush; Atriplex confertifolia, shadscale; Cercocarpus montanus, true mountain mahogany; Chrysothamnus nauseosus ssp. Biglovii and C. nauseousus ssp. Consimilis, rubber rabbit brush; Cowania stansburiana, cliffrose; Fallugia paradoxa, apache plume; Menodora scabra, rough menodora; Sarcobatus vermiculitus, greasewood; Sphaeralcea incana, globe mallow; Agropyron smithii, desert wheatgrass; Andropogon scoparius, little bluestem; …

Gap Formation: A Reproductive Isolating Mechanism For Parus Atricapillus And P. Carolinensis In Northern Indiana, Peter Gorham Merritt

Masters Theses

No abstract provided.

A Histological And Immunological Study Of The Forty-Eight Hour Normal Lymphocyte Transfer Reaction, Charles W. Ford

Masters Theses

No abstract provided.

The Effects Of Gonadal Hormone Manipulations On Aggressive Target-Biting In Mice, George C. Wagner

Masters Theses

No abstract provided.