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Genetic And Environmental Determinants Of Wing Polymorphism In The Waterstrider Limnoporus Canaliculatus, Anthony J. Zera, David J. Innes, Margaret E. Saks

Anthony Zera Publications

Wing polymorphism commonly occurs in many insects, especially species of Orthoptera, Coleoptera, Homoptera, and Hemiptera (Harrison, 1980). The polymorphism consists of discrete differences in wing length with morphs exhibiting fully developed, reduced, or totally absent wings. In addition to differences in wing length, morphs often differ in a number of other characteristics such as degree of flight muscle development, duration of nymphal development, time to first reproduction, fertility and diapause (Anderson, 1973; Vepsäläinen, 1978; Harrison, 1980).

Wing polymorphism is an attractive system for investigating the evolution of dispersal in natural populations (Vepsäläinen, 1978; Denno and Grissell, 1979; Harrison, 1980). A …

1983 Little International Agricultural Exposition Catalog, Little International Agricultural Exposition South Dakota State University

Little International "Little I" Agricultural Exposition Catalogs

No abstract provided.

Evidence For Hydrated Spermidine-Calf Thymus Dna Toruses Organized By Circumferential Dna Wrapping, Kenneth A. Marx, George C. Ruben

Dartmouth Scholarship

In spermidine-condensed calf thymus DNA preparations, torus–shaped condensates were shown by transmission electron microscopy to exist under the hydrated conditions of the freeze fracture experiment. Using extremely low Pt metal deposition levels (9 A Pt/C) high–contrast replicas of the spermidine–DNA toruses were obtained that showed circumferential wrapping of single DNA double helix–size surface fibres. Stereoscopic analysis of high magnification stereomicrographs established some details of the three-dimensional organization of two DNA double helix sections winding circumferentially on the inner surface of one such torus. These measurements demonstrate the usefulness of stereoscopic analysis of these high macromolecular organization magnification. Measurements on a …

Editorials

Henry Ford Hospital Medical Journal

No abstract provided.

A Winter Roadside Survey Of Hawks In Eastern Nemaha County, Nebraska, Steve Shupe, Robert Collins

Nebraska Bird Review

During the winters of 1980-81 and 1981-82 roadside surveys of hawks were conducted on 76 square miles (196.8 square kilometers) of Nemaha County, Nebraska. Forty surveys were conducted each winter to acquire baseline data on distribution and populations. Ten species were observed, with the Red-tailed Hawk (49.7%) and the American Kestrel (21.5%) comprising more than 70%of all sightings. Population estimates for each species were determined by using square mile extrapolation and the bounded count method. Intervals of confidence were calculated in an attempt to determine upper and lower winter population limits.

The Prairie Naturalist Volume 15, No. 1. March 1983

The Prairie Naturalist

NUTRIENT POOL SIZE RELATIONS IN THE UNDERSTORY STRATA OF A NORTHERN GREAT PLAINS GALLERY FOREST ▪ K. T. Killingbeck

COMPARISON OF OLD FIELD SUCCESSION ON A TALLGRASS PRAIRIE AND A NEBRASKA SANDHILLS PRAIRIE ▪ M. L. Bomberger, S. L. Shields, A. T. Harrison and K. H. Keeler

MANIPULATION OF FLOOD MEADOW VEGETATION AND OBSERVATIONS ON SMALL MAMMAL POPULATIONS ▪ J. E. Cornely, C. M. Britton and F. A. Sneva

CANVASBACK INTRODUCTION IN WEST-CENTRAL MINNESOTA ▪ H. A. Doty

FORAGING BEHAVIOR AND WATER USE OF HORSES AND CATTLE IN THE WYOMING RED DESERT ▪ L. J. Krysl, G. E. Plumb, M. …

The Regional Acceleratory Phenomenon: A Review, Harold M. Frost

Henry Ford Hospital Medical Journal

The regional acceleratory phenomenon (RAP) is a complex reaction of mammalian tissues to diverse noxious stimuli. The phenomenon occurs regionally in the anatomical sense, involves both soft and hard tissues, and is characterized by an acceleration and domination of most ongoing normal vital tissue processes. It may represent an "SOS" mechanism which evolved to potentiate tissue healing and local tissue defensive reactions. When a RAP is obtunded, retarded healing and lowered resistance to infection and mechanical abuse may ensue. When ignored in experimental design, the phenomenon can seriously perturb studies of metabolic bone disease and of the effects of mechanical, …

Current Concepts In Otitis Media, Michael M. Paparella

Henry Ford Hospital Medical Journal

Otitis media continues to be a common and disabling problem which has become, in recent years, a fertile area for research. Based on studies in animals and humans, otitis media is classified into four groups: acute purulent otitis media (POM), serous otitis media (SOM), and mucoid or secretory otitis media (MOM). Together, these are referred to as otitis media with effusion (OME). The types can overlap and evolve into another type to become chronic otitis media and mastoiditis, characterized by the presence of granulation tissue or cholesteatoma. The biochemistry, microbiology, and pathology as well as clinical features of the disease …

Therapeutic Hemapheresis, Sheikh M. Saeed, B. K. S. Raman

Henry Ford Hospital Medical Journal

No abstract provided.

Back Matter

Henry Ford Hospital Medical Journal

No abstract provided.

Conformational Analysis Of Nonsteroidal Estrogen Analogs, Robert N. Spady

Loma Linda University Electronic Theses, Dissertations & Projects

In target tissue, estrogens initiate a series of events, ending in protein synthesis, by binding to a cytoplasmic receptor. Once the estrogen binds, the receptor complex is activated--a process including dimerization of the estrogen complex with another subunit. In order to study the possible receptor-ligand interactions, conformational analysis was performed on several nonsteroidal estrogen analogs, using the CAMSEQ8 molecular mechanics program.

The probability that a molecule will exist in a given conformational energy well depends both on the energy and the shape of the well. A method has been previously worked out to calculate probabilities using both of these variables, …

Number 14 (March 1983), Southern Fishes Council

Southeastern Fishes Council Proceedings

Fishes of the South Fork of the Kentucky River with Notes and Records from Other Parts of the Drainage. By B.A. Branson and D.L. Batch, 16 pp.

Fishes Of The South Fork Of The Kentucky River, With Notes And Records From Other Parts Of The Drainage, Branley A. Branson, Donald L. Batch

Southeastern Fishes Council Proceedings

No abstract provided.

Comparison Of Old Field Succession On A Tallgrass Prairie And A Nebraska Sandhills Prairie, Mary Bomberger Brown, Shelly L. Shields, A. Tyrone Harrsion, Kathleen H. Keeler

School of Biological Sciences: Faculty Publications

Long held to be reasonably well understood, the process of ecological succession has recently come under attack. The predictability of successional changes has been doubted (Walker 1970), the mechanism of species replacement has been questioned (Connell and Slatyer 1977), and the reality of steady-state (climax) challenged (Botkin and Sobel 1975, Connell and Slatyer 1977, Connell 1978). In particular, several communities are presently recognized as having "cyclic succession" (Ricklefs 1973), in which the process is continually repeating. Such communities include heaths (Watt 1947), prairie pot-hole marshes (Vander Valk and Davis 1978), spruce-fir forests (Sprugel 1976, Sprugel and Bormann 1981), and intertidal …

The Distribution Of Macrobenthos In Barataria Basin, Louisiana, Antonio Liborio Philomena

LSU Historical Dissertations and Theses

Macrobenthos and environmental variables were measured in the Barataria basin, Louisiana, at 32 stations in November 1978. Three of the stations (Lake Salvador, Little Lake and St. Denis Bayou) were sampled bimonthly from November 1977 through November 1978. Abundance, diversity, and biomass results indicated two different areas: fresh, low-salinity habitats in the upper and middle basin with high biomass, abundance, and diversity, and high-salinity habitats in the lower basin with low biomass, abundance, and diversity. Over the whole basin, crustaceans were the most abundant organisms, while the mollusks dominated the biomass. Insects, nematodes, and oligochaetes were characteristic of freshwater habitats, …

Kentucky's Ipm Program For Alfalfa, Chris M. Christensen

Kentucky Alfalfa and Stored Forage Conference

Integrated Pest Management (IPM) is a concept that encourages the use of a variety of strategies in the management of crop pests. It is very important to have an indepth understanding of the crop production system when implementing an IPM program. An IPM program is dynamic requiring a continual evaluation of the status of the crop, the associated pest complex, the effects of the pests and the biological deterrents to those pests. If a pest population gets "out of hand" and begins to cause economic damage, pest management techniques may need to be applied. These pest management measures may be …

Breeding Success And Nest Site Characteristics Of The Western Bluebird On Parrett Mountain, Marcia Diane Sims

Dissertations and Theses

The lack of suitable nest sites may be a limiting factor for Western Bluebird populations inhabiting the upper Willamette Valley. Nest box trails have been established on the hills surrounding the Portland metropolitan area. Since their placement, approximately 25% of the boxes available have been used by Western Bluebirds as nest cavities. This study was undertaken to identify factors which might determine the selection of a nest box by Western Bluebirds and the subsequent nest success or failure.

The breeding biology of Western Bluebirds using the nest box trail located on Parrett Mountain, Oregon in 1979 was investigated. Breeding season, …

Trox Hamatus Robinson (Troginae) Using A Canthon (Scarabaeinae) Brood Ball And New Records Of North American Trox (Coleoptera: Scarabaeidae), Brett C. Ratcliffe

University of Nebraska State Museum: Entomology Papers

Trox hamatus Robinson was observed feeding on an abandoned Canthon brood ball in southeastern Nebraska. Although some Aphodiinae and Scarabaeinae have been reported feeding on or stealing other scarabaeine dung balls, this represents the first reported observation of this behavior for a member of the Troginae. It is suggested that the brood ball was opportunistically used by the Trox, and the event is rare. In addition, new state records are provided for Trox aequalis Say, T. atrox LeConte, T. laticollis LeConte, and T. tesselatus (LeConte).

Kentucky Warbler (Vol. 59, No. 1), Kentucky Library Research Collections

The Kentucky Warbler

No abstract provided.

Agricultural Experiment Station News February 1983

Agricultural Research Division: News and Annual Reports

CONTENTS:
TRAVEL TO SCHOLARLY MEETINGS
PROFESSIONAL TRAVEL FUNDS
GRANT PROPOSALS TO COMMODITY CHECK-OFF BOARDS
AES ADVISORY COUNCIL
AES DIRECTOR'S OFFICE MOVES
NATIONAL AG LIBRARY
APPROVED PROJECTS
AES GRANTS RECEIVED FOR 1ST SIX MONTHS OF FY 83
New Experiment Station Personnel

Cranes Of The World [Complete Work], Paul A. Johnsgard

Cranes of the World by Paul A. Johnsgard

Cranes are a group of birds that can lift the human spirit as few other wild animals can do; their great size, marvelous soaring abilities, humanoid traits such as "dancing," and penetrating voices, all strike deep into the human psyche and forcefully remind us of the beauty and mystery of the natural world around us. We cannot lose even a single species of crane without seriously rendering our own existence that much poorer. It is in that spirit that I decided to write the present book, which I hope will be of value to ecologists, ethologists, conservationists, aviculturalists, and anyone …

Two Transcription Products Of The Vesicular Stomatitis Virus Genome May Control L-Cell Protein Synthesis, David D. Dunigan, Jean M. Lucas-Lenard

Nebraska Center for Virology: Faculty Publications

When mouse L-cells are infected with vesicular stomatitis virus, there is a decrease in the rate of protein synthesis ranging from 20 to 85% of that in mock-infected cells. Vesicular stomatitis virus, irradiated with increasing doses of UV light, eventually loses this capacity to inhibit protein synthesis. The UV inactivation curve was biphasic, suggesting that transcription of two regions of the viral genome is necessary for the virus to become inactivated in this capacity. The first transcription product corresponded to about 373 nucleotides, and the second corresponded to about 42 nucleotides. Inhibition of transcription of the larger product by irradiating …

Coccidia From Kangaroo Rats (Dipodomys Spp.) In The Western United States, Baja California, And Northern Mexico With Descriptions Of Eimeria Merriami Sp. N. And Isospora Sp., Carla A. Stout, Donald W. Duszynski

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Since January 1975, 104 of 361 (29%) kangaroo rats (Dipodomys spp.) examined for coccidia had oocysts in their feces. These included 32 of 71 (45%) D. agilis from California (3 of 8, 38%) and Baja California Norte (29 of 63, 46%); none of 18 D. deserti from Sonora, Mexico; one of one D. gravipes from Baja Norte; 43 of 124 (35%) D. merriami from California (1 of 4, 25%), New Mexico (16 of 49, 33%), Baja Norte (12 of 23, 52%), Baja Sur (6 of 20, 30%), and Sonora, Mexico (8 of 28, 29%); 17 of 103 (17%) D. …

Combining Ability Effects For Forage Residue Traits In Grain Sorghum Hybrids, W. M. Ross, H. J. Gorz, Francis A. Haskins, G. H. Hookstra, J. K. Rutto, R. Ritter

Department of Agronomy and Horticulture: Faculty Publications

Combining ability effects of 10 female and 10 male inbred lines were evaluated for agronomic, grain, and forage residue traits in 100 grain sorghum [Sorghum bicolor (L.) Moench] F₁ hybrids for 2 years. Traits studied were height, flowering, tillering, seed weight, yield, protein percentage, protein yield of grain, leaves, and stems; and in vitro dry matter disappearance (IVDMD) percentage and digestible dry matter (DDM) yield of leaves and stems. General combining ability (GCA) effects exceeded specific combining ability (SCA) effects for all traits except height in females and grain and leaf yields in males. Both GCA and SCA …

Life History Of The Lahontan Cutthroat Trout, Salmo Clarki Henshawi, In Pyramid Lake, Nevada, William F. Sigler, William T. Helm, Paul A. Kucera, Steven Vigg, Gar W. Workman

Great Basin Naturalist

The Pyramid Lake Lahontan cutthroat trout (Salmo clarki henshawi) population was sampled on a monthly basis from November 1975 through December 1977. A subsample of 676 trout, stratified by fish size and lake habitat, provided biological data. The entire population is presently derived from hatchery production, stocked at lengths of approximately 75 to 300 mm. Peak annulus formation occurs in March and April, followed by the period of maximum growth. Scale patterns illustrate a variable growing season. Maximum growth in length is in the first three years of life; after that males begin to grow faster than females. …

Precise And Accurate Determination By Infrared Photometry Of Co2 Dynamics In Marine Ecosystems, Kenneth M. Johnson, Curtis M. Burney, John Mcn. Sieburth

Marine & Environmental Sciences Faculty Articles

Preliminary studies with an ampule analyzing unit and infrared (IR) detector showed that procedures for standardization and determination of total carbon dioxide (ΣCO₂), while often precise, lacked the accuracy required to estimate the net productivity and respiration of aquatic ecosystems during studies in which sampling over diel cycles was used. Scaling down sample and standard volumes to the µl range and the use of a commercial sodium carbonate standard without dilution before and after replicate sample injections gave accurate results as shown by comparison with indirect (pH-alkalinity) ΣCO₂, determinations with a standard error of ±3 µmoles …

Southern Pine Beetle: Annotated Bibliography, 1868-1982, David Kulhavy, Paul C. Johnson

eBooks

The FAMULUS computerized literature retrieval system was used to produce an annotated bibliography for the southern pine beetle, Dendroctonus frontalis Zimmermann. The bibliography contains 1,235 citations and is cross indexed by AUTHOR, TAXONOMY and KEYS to subject areas.

Relative Intestine Length And Feeding Ecology Of Freshwater Fishes, David O. Ribble, M H. Smith

Biology Faculty Research

There is a significant relationship between the intestine length (Y) and total body length (X) for 11 species of freshwater fish (Y = 0.08X1.42). Sufficient variation exists about this relationship to indicate important differences among the species' diets. The diets for each species, ranked on a Trophic Index scale determined from literature data, are negatively rank order correlated with the mean relative intestine lengths (rs = -0.67). There is no significant rank order correlation between the Trophic Indices determined from data on stomach contents and the mean relative intestine lengths for fish from a single creek.

The Trick Of The Tryp: [Dr. George Cross], Fulvio Bardossi, Judith N. Schwartz

Rockefeller University Research Profiles

Rockefeller University Research Profiles are a series of scientific profiles that were published quarterly, from 1980-1990, by the Rockefeller University. Each issue features the research and achievements of an individual Rockefeller University scientist.

A Survey Of The Aspidogastrean And Hydracarine Parasites Of Bivalue Molluscs In Western West Virginia, Donald W. Danford

Theses, Dissertations and Capstones

Aspidogaster conchicola and Cotylaspis insignis were only two aspidogastrid trematodes recovered in a year long study involving 500 bivalves (22 species) collected from a thirteen county area in western West Virginia. Also collected were three species of aquatic mites identified as: Union­ icola fossulata, Unionicola formosa, and Najadicola ingens. Only ten species of mussels were infested with trematodes: Pleurabema cordatum (100%); Anodonta grandis (70% for A•conchicola, 60% for Q. insignia); Potamilus alata (50%); Tritogonia verrucosa (46%); Strophitus undulatus (6.25%); guadrula guadrula (33%); Amblema plicata (31%); guadrula postulosa (50%); Lampsilis ventricosa (7.11%); Lampsilis radiata luteola (7.12% for A. conchiocola, 10.2% for …