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Evolutionary Constraints On Population Structure: The Parasites Of Fundulus Zebrinus (Pisces: Cyprinodontidae) In The South Platte River Of Nebraska, John J. Janovy Jr., Scott D. Snyder, Richard E. Clopton

John J. Janovy, Jr. Publications

Population and community descriptor values (parasites per host, prevalence per parasite species, variance/mean ratios, species density, and diversity indices) for the 7-species parasite community of 61 relatively homogeneous samples of Fundulus zebrinus (Pisces: Cyprinodontidae) in the South Platte River of Nebraska, U.S.A., taken over a 14-yr period, are reported. South Platte River streamflow fluctuates over two orders of magnitude on several time scales-monthly, annually, and over multiple year wet-dry cycles. Relatively homogeneous sampling of a single host species with several parasite species provided a system that allowed assessment of the contribution of evolved parasite life cycles to population structure in …

Simulation Of A Microdosimetry Problem: Behavior Of A Pseudorandom Series At A Low Probability, P. Meyer, J. E. Groetz, Robert Katz, M. Fromm, A. Chambaudet

Robert Katz Publications

The carcinogenic effects for low dose irradiations are not very well known. Estimations usually are made based on the effects observed at high doses that are then extrapolated to low doses. To estimate low dose effects, the ICRP (International Commission on Radiological Protection) uses a linear extrapolation matched with a dose-rate reduction factor equal to two. This proportionality of the effect and dose, even for the lowest doses and dose-rates, leads to two assumptions which must be questioned :
1. the efficiency of DNA repair in cells does not vary with the dose and the dose-rate,
2. when one single …

Two New Species Of Litomosoides (Nemata: Onchocercidae) From Ctenomys Opimus (Rodentia: Ctenomyidae) On The Altiplano Of Bolivia, Sara V. Brant, Scott Lyell Gardner

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Two filarioid nematodes, Litomosoides andersoni n. sp. and Litomosoides ctenomyos n. sp. (Nemata: Onchocercidae), are described from the mesenteries of the subterranean rodent Ctenomys opimus (Rodentia: Hystrichognathi) collected on the altiplano of Bolivia. Specimens collected near Rancho Huancaroma (Oruro Dept.) in 1984 and 1986 can be recognized as undescribed by the structures of the spicules and stoma and the shape of the ovijector. This record represents the first time members of the genus Litomosoides have been recovered from rodents of the family Ctenomyidae; this also represents the first published report of these nematodes from mammals in Bolivia.

Cropwatch No. 97-18, July 25, 1997, Lisa Brown Jasa

Crop Watch (1994–2005)

Inside

Heat spell to continue...............134

2ndECB egg-laying...............136

Free software available...............136

2ndECB worksheet...............137

Pesticide runoff tracked...............138

Applicator training...............139

Wheat conference...............140

Panhandle Field Day...............140

New wheat varieties...............141

Beneficial insects...............141

You asked about it: tree plantings...............142

Weather...............142

Endangered And Threatened Wildlife And Plants; Final Rule To Designate The Whooping Cranes Of The Rocky Mountains As Experimental Nonessential And To Remove Whooping Crane Critical Habitat Designations From Four Locations

Endangered Species Bulletin

The U.S. Fish and Wildlife Service determines that it will designate the whooping crane (Grus americana) population of the Rocky Mountains as an experimental nonessential population and will remove whooping crane critical habitat designations from four National Wildlife Refuges; Bosque del Apache in New Mexico, Monte Vista and Alamosa in Colorado, and Grays Lake in Idaho. The private lands involved are holdings inside refuge boundaries and a 1-mile buffer around Grays Lake National Wildlife Refuge. The Service will use this population, and captive-reared sandhill cranes and whooping cranes, in experiments to evaluate methods for introducing whooping cranes into …

Cropwatch No. 97-16, July 11,1997, Lisa Brown Jasa

Crop Watch (1994–2005)

Sample the web version of CropWatch, see page 123.

Inside

Reports from the field.............120

Restrict 2,4-D use.............121

Pesticide hotline.............121

Corn rootworm beetles.............122

Bean bars and wipers.............123

Preharvest intervals.............123

You asked about it.............124

Organophosphates.............124

Combine adjustments.............125

Diagnostics update.............125

Catches Of Humpback And Other Whales From Shore Stations At Moss Landing And Trinidad, California, 1919-1926, Phillip Clapham, Stephen Leatherwood, Isidore Szczepaniak, Robert L. Brownell Jr.

United States Department of Commerce: Staff Publications

Logbook data from California shore whaling stations at Moss Landing (1919-1922 and 1924) and Trinidad (1920 and 1922-1926) are analyzed. The logs for the two stations record the taking of 2,111 whales, including 1,871 humpbacks, 177 fin whales, 26 sei whales, 3 blue whales, 12 sperm whales, 7 gray whales, 1 right whale, 1 Baird’s beaked whale, and 13 whales of unspecified type (probably humpbacks). Most whales were taken from spring to autumn, but catches were made in all months of some years. The sex ratios of humpback, fin, and sei whales (the three species with sufficient sample sizes to …

Nebline, July 1997

NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County

Home*A*Syst: Helping you assess environmental risks in and around your home
Watch for squash vine borer
Summer patch of turfgrass
Storing extra seeds
Mower wounds can kill trees
Replant iris
Harvesting
Recycle your pesticide containers at the Lancaster County Fair!
Chigger alert! Don’t ruin your recreational outing
Master Beekeeping/Queen Rearing Workshops
The nonstop dropper
Water patrol checklist
Have you ever seen dead flies clinging to the top of vegetation?
UNL to conduct hands-on Diagnostic Clinics in July
Wheel traffic reduces alfalfa yield
Dealing with summer pasture shortages
Planning tips for noxious weed control in CRP contracts
Staying safe on the …

Mapping The Marias The Interface Of Native And Scientific Cartographies, Barbara Belyea

Great Plains Quarterly (through 2013)

In early June 1805, as they traveled up the Missouri toward the continental divide, Meriwether Lewis and William Clark came to a fork where two rivers of apparently comparable width and force flowed together. The captains paused at this junction, unable to decide which river was the "main stream" of the Missouri and which was the tributary. They were determined to fulfill Thomas Jefferson's instructions as exactly as possible: "to explore the Missouri river, & such principal stream of it, as, by it's course and communication with the waters of the Pacific ocean ... may offer the most direct & …

Canadian Cooperative Wildlife Health Center Newsletter, Volume 4-3, Summer 1997

Canadian Cooperative Wildlife Health Centre: Newsletters and Publications

CCWHC Newsletter on the World Wide Web
Five-Year Review of the CCWHC
Centre for Coastal Health Moves to Nanaimo
Newcastle Disease in Cormorants, California, USA-May 1997
Chronic Wasting Disease of Wild Deer
Salmonellosis in Herons, Gannet
Probable Newcastle Disease in a cormorant
Neoplasm in Eiders
Birthing Death in a Harbour Porpoise
Low Prevalence of Neoplasia in St. Lawrence River Eels
Mortality at a Bird Feeder
Suspected Teflton Toxicosis in Songbirds
Suspected Avitrol Poisoning of Non-target Species
Forensic (medico-legal) Examinations
Mortality of Porpoises in British Columbia
Predator Attacks in British Columbia
Spring Botulism

Canadian Cooperative Wildlife Health Centre, Volume 4-3, Summer 1997

Canadian Cooperative Wildlife Health Centre: Newsletters and Publications

CCWHC Newsletter on the World Wide Web
Five-Year Review of the CCWHC
Centre for Coastal Health moves to Nanaimo
Newcastle Disease in Cormorants, California, USA - May 1997
Chronic Wasting Disease of Wild Deer
Salmonellosis in Herons, Gannet
Probable Newcastle Disease in a Cormorant
Neoplasm in Eiders
Birthing Death in a Harbour Porpoise
Low Prevalence of Neoplasia in St. Lawrence River Eels
Mortality at a Bird Feeder
Strychnine Poisoning of a Peregrine Falcon
Suspected Teflon Toxicosis in Songbirds
Suspected Avitrol Poisoning of Non-target Species
Forensic (Medico-legal) Examinations
Mortality of Porpoises in British Columbia
Predator Attacks in British Columbia
Spring Botulism

Nebraska's Flying Mammals, Patricia W. Freeman, Kenneth N. Geluso, J. Scott Altenbach

University of Nebraska State Museum: Mammalogy Papers

They flit around at dusk in crazy patterns. They fly around street lights and dive at rocks thrown in the air. They have high-pitched squeaks and turn up in unexpected places. They have strange, little faces and bizarre ears. They have soft fur and a thin rubbery membrane across their long fingers. They are bats, Nebraska's only flying mammals. Bats are mysterious. Is it because they come out at night and we come out in the daytime? Maybe it is because we associate flying with birds, not mammals. Bats are dark and foreboding, not brightly colored. At first, these mysterious …

Insect Pests And Arthropod Predators Associated With Tree-Turf Landscapes, Mary Ellen Dix, Frederick P. Baxendale

Department of Entomology: Faculty Publications

Sweep-nets and pitfall traps were used to examine the distribution and dynamics of predominant predators and pests in turfgrass foliage in parks, golf courses and suburban/rural landscapes in 1991 and 1992. Araneae, Formicidae, and Coccinellidae were the most abundant predators in the sweeps, while Araneae, Formicidae, and) Carabidae were the most abundant predators in the pitfall traps. In both years, Araneae comprised over 60% of the total predators in the sweep samples. Formicidae (>70%) and Araneae (13-19%) were the most abundant arthropod predators in the pitfall samples. Cicadellidae, Chrysomelidae, and Orthoptera accounted for over 96% of the prey in …

Phagosomal Proteins Of Dictyostelium Discoideum, Betsy L. Rezabek, Juan M. Rodriguez-Paris, James A. Cardelli, Catherine P. Chia

Papers in Microbiology

In recognizing food particles, Dictyostelium cell-surface molecules initiate cytoskeletal rearrangements that result in phagosome formation. After feeding D. discoideum cells latex beads, early phagosomes were isolated on sucrose step gradients. Protein analyses of these vesicles showed that they contained glycoproteins and surface-labeled species corresponding to integral plasma membrane proteins. Cytoskeletal proteins also were associated with phagosomes, including myosin II, actin and a 30 kDa-actin bundling protein. As seen by the acridine orange fluorescence of vesicles containing bacteria, phagosomes were acidified rapidly by a vacuolar H+-ATPase that was detected by immunoblotting. Except for the loss of cytoskeletal proteins, few other changes …

Calculation Of Heavy Ion Inactivation And Mutation Rates In Radial Dose Model Of Track Structure, Francis A. Cucinotta, John W. Wilson, Mark R. Shavers, Robert Katz

Robert Katz Publications

In the track structure model, the inactivation cross section is found by summing an inactivation probability over all impact parameters from the ion to the sensitive sites within the cell nucleus. The inactivation probability is evaluated by using the dose response of the system to gamma rays and the radial dose of the ions and may be equal to unity at small impact parameters. We apply the track structure model to recent data with heavy ion beams irradiating biological samples of E. Coli, Bacillus Subtilis spores, and Chinese hamster (V79) cells. Heavy ions have observed cross sections for inactivation that …

Agricultural Research Division 111th Annual Report 1997

Agricultural Research Division: News and Annual Reports

It is a pleasure to provide you with the 111th Annual Report of the University of Nebraska Agricultural Research Division (ARD). Once a year we take the opportunity to assess what has been accomplished by our faculty, students, and staff during the past twelve months. In looking at the report, one cannot help but be impressed with the increasing outputs from our research program, but more important is the new technology and knowledge provided to Nebraskans to improve the profitability and competitiveness of their enterprises, to enhance the environment, and to improve their quality of life.

This report provides some …

Solvent-Induced Interactions Between Hydrophobic And Hydrophilic Polyatomic Sheets In Water And Hypothetical Nonpolar Water, Kenichiro Koga, Xiao Cheng Zeng, Hideki Tanaka

Xiao Cheng Zeng Publications

Hydrophobic and hydrophilic interactions are two major intermolecular forces between hydrophobic nonpolar and hydrophilic polar sites of macromolecules or materials surfaces in solvents. To further understand these two interactions at the microscopic level, an idealized polyatomic model is devised, which includes hydrophobic, hydrophilic, and partially hydrophilic polyatomic planar square molecular sheets. The hydrophobic molecular sheet is composed of the Lennard-Jones particles while the hydrophilic molecular sheet consists of positive and negative charge sites. In the framework of the extended reference interaction site model integral equation theory the solvent-induced interactions (or the potential of mean forces) between two parallel molecular sheets …

Twenty-Five Years Of The Shadle Fellowship, Hugh H. Genoways, Patricia W. Freeman

University of Nebraska State Museum: Mammalogy Papers

Over the past 25 years, Albert R. and Alma Shadle Fellowships have been awarded to 26 young mammalogists. Of the 26 Shadle Fellows, 20 are men and six are women. Twenty-five of the 26 Fellows remain active in science and are still members of the American Society of Mammalogists. Shadle Fellows have been selected from 15 academic institutions and 17 professors have served as academic advisors for awardees. Shadle Fellows have already made significant contributions to the American Society of Mammalogists and to their home institutions. Awardees have published an average of 3.2 scientific articles per year per Fellow since …

Characteristics Of Beet Soilborne Mosaic Virus, A Furo-Like Virus Infecting Sugar Beet, G.B. Heidel, C.M. Rush, T.L. Kendall, S.A. Lommel, Roy C. French

Department of Plant Pathology: Faculty Publications

Beet soilborne mosaic virus (BSBMV) is a rigid rod-shaped virus transmitted by Polymyxa betae. Particles were 19 nm wide and ranged from 50 to over 400 nm, but no consistent modal lengths could be determined. Nucleic acids extracted from virions were polyadenylated and typically separated into three or four discrete bands of variable size by agarose-formaldehyde gel electrophoresis. RNA 1 and 2, the largest of the RNAs, consistently averaged 6.7 and 4.6 kb, respectively. The sizes and number of smaller RNA species were variable. The molecular mass of the capsid protein of BSBMV was estimated to be 22.5 kDa. …

Epigenetic Silencing Of A Foreign Gene In Nuclear Transformants Of Chlamydomonas, Heriberto D. Cerutti, Anita M. Johnson, Nicholas W. Gillham, John E. Boynton

Center for Plant Science Innovation: Faculty Publications

The unstable expression of introduced genes poses a serious problem for the application of transgenic technology in plants. In transformants of the unicellular green alga Chlamydomonas reinhardtii, expression of a eubacterial aadA gene, conferring spectinomycin resistance, is transcriptionally suppressed by a reversible epigenetic mechanism(s). Variations in the size and frequency of colonies surviving on different concentrations of spectinomycin as well as the levels of transcriptional activity of the introduced transgene(s) suggest the existence of intermediate expression states in genetically identical cells. Gene silencing does not correlate with methylation of the integrated DNA and does not involve large alterations in its …

Proceedings Of The Global Conference On Ergot Of Sorghum, Carlos R. Casela, Jeffery A. Dahlberg

INTSORMIL Impacts and Bulletins

In June 1996, several of us had the opportunity to see sorghum ergot in Brazil and the damage that the disease can do. We saw severe damage in seed production plots and witnessed the pain that seed producers had to go through to deal with this new problem. There was a wide spread scare in the sorghum community in the Americas because of the infamous reputation of the disease in causing damage in seed production fields. As a silver lining, we also observed first hand, the excellent research program that the Brazilians had in place. It became apparent that all …

Secretarial Order # 3206 Subject: American Indian Tribal Rights, Federal-Tribal Trust Responsibilities, And The Endangered Species Act, Secretary Of The Interior, Secretary Of Commerce

Water Law Documents

This Order is issued by the Secretary of the Interior and the Secretary of Commerce (Secretaries) pursuant to the Endangered Species Act of 1973, 16 U.S.C. 1531, as amended (the Act), the federal-tribal trust relationship, and other federal law. Specifically, this Order clarifies the responsibilities of the component agencies, bureaus and offices of the Department of the Interior and the Department of Commerce (Departments), when actions taken under authority of the Act and associated implementing regulations affect, or may affect, Indian lands, tribal trust resources, or the exercise of American Indian tribal rights, as defined in this Order. This Order …

Coyote Food Habits At Desoto National Wildlife Refuge, Nebraska, Jeffrey J. Huebschman, Scott E. Hygnstrom, Joseph A. Gubanyi

School of Natural Resources: Faculty Publications

Coyote (Canis latrans) food habits were detennined from 490 scats collected from October 1994 to October 1995 at DeSoto National Wildlife Refuge (DNWR), along the Nebraska/Iowa border. Mammals occurred most frequently, as measured by percent-of-scats (POS) , followed by vegetation, birds, and invertebrates. Mammals also constituted the largest portion of coyote diet, as determined by fresh weight correction factors. Within the mammalian category, white-tailed deer (Odocoileus virginianus) occurred most frequently and constituted the largest portion of diet by fresh weight correction factors. White-tailed deer occurrence and importance in diet peaked in June, which corresponds to the …

Cultural, Historical, And Subcultural Contexts Of Adolescence: Implications For Health And Development, Lisa J. Crockett

Department of Psychology: Faculty Publications

Although clearly influenced by biological and psychological growth, adolescent development is also molded by the social and cultural context in which it occurs. As the transition from childhood to adulthood, adolescence is closely tied to the structure of adult society, and the expectations for youth during this period reflect, in important ways, the skills and qualities deemed important for success in adult roles (Benedict, 1937; Havighurst, 194811972). Furthermore, prevailing demographic, economic, and political conditions determine the adult occupational and social roles to which young people can aspire, as well as the access to and competition for those roles (Elder, 1975). …

Specific Genomic Regions In Common Bean Condition Resistance To Multiple Pathogens, Phillip N. Miklas, Valerie Stone, Carlos A. Urrea, James S. Beaver

Panhandle Research and Extension Center

A genetic linkage map of 170 RAPD markers mapped across 79 recombinant inbred lines (Dorado and XAN-176) reveal genomic regions that condition multiple disease resistance to fungal (Ashy Stem Blight—Macrophomina phaseolina), viral (bean golden mosaic virus— BGMV), and bacterial (common bacterial blight—Xanthomonas campestris pv. phaseoli) pathogens of common bean (Phaseolus vulgaris). A genomic site on linkage group US-1 had a major effect, explaining 18%, 34%, and 40% of the variation in phenotypic reaction to ashy stem blight, BGMV, and common bacterial blight disease, respectively. Adjacent to this region was a QTL conditioning 23% of …

Ard News June 1997

Agricultural Research Division: News and Annual Reports

CONTENTS:
COMMENTS FROM THE DEAN
ESCOP/ACOP LEADERSHIP DEVELOPMENT PROGRAM-HIGHLIGHTS OF A YEAR WELL SPENT
NOMINATIONS SOUGHT FOR JUNIOR FACULTY EXCELLENCE IN RESEARCH AWARD
SHRIPAT KAMBLE SELECTED FOR LEADERSHIP DEVELOPMENT COURSE
NUPROF ORIENTATION
ARD-ADMINISTERED GRANT AND AWARDS PROGRAMS
SAMPSON RANGE AND PASTURE MANAGEMENT ENDOWMENTS
ANNA ELLIOTT PROPOSALS
ARD INTERDISCIPLINARY RESEARCH GRANTS PROGRAM
PROPOSALS SUBMITTED FOR FEDERAL GRANTS
GRANTS AND CONTRACTS RECEIVED APRIL AND MAY, 1997
NEW OR REVISED PROJECTS

Flea News 54 (June 1997), Robert E. Lewis

Flea News

Miscellanea

Advisory Committee on Immunization Practices (ACIP) update

Nomenclatural tidbits

Siphonaptera literature

Birds Of The Lake Ogallala State Recreation Area, Timothy M. Bergin

Nebraska Bird Review

The Lake Ogallala State Recreation Area (LOSRA) is located immediately downstream from Lake McConaughy, which was formed by the construction of Kingsley Dam across the North Platte River, and includes riparian woodland, shrubland, grassland, marsh, sandbeach, rivers, ponds, and lakes. Birds were surveyed in LOSRA from 1988 to 1992 and censused in the southwest campground of LOSRA from late May to mid-July during the 1991 and 1992 breeding seasons. Seventy-five bird species (56 terrestrial and 19 aquatic) were observed, including several hybridizing species. Thirty-one terrestrial species inhabited the southwest campground, but only 60% of these were counted during biweekly censuses; …

A George Miksch Sutton Bibliography, Paul A. Johnsgard

Nebraska Bird Review

Members of the Nebraska ornithologists' Union often do not realize that the reason a George Miksch Sutton sketch of a burrowing owl is used as the logo of our organization, and also appears on the cover of every issue of The Nebraska Bird Review, is because Dr. Sutton was a native Nebraskan. He was born in Bethany (now part of northeastern Lincoln) in 1898, and several years of his childhood were spent there before the family left the state permanently. In spite of Dr. Sutton's great influence on American ornithology and bird art, no bibliography of his writings has …

Spring Field Report, March-May 1997, W. Ross Silcock

Nebraska Bird Review

First a correction: in the Fall Seasonal Report (NBR 63:101) the account on Whooping Crane listed 2 reports 25 November; these should have been 25 October.

This report includes observations, designated (B), reported to the Nebraska Birdline (402-292-5325), operated by Loren and Babs Padelford. While these are anonymous submissions, many are reported to us subsequently by the original observers; those which are not but are significant but unsubstantiated, are indicated herein as such by a phrase like "no details submitted". We have also used this phrase for other unsubstantiated reports herein. Hopefully, observers involved will send us a few …