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Table Of Contents: Volume 9, No. 1 - 2

Insecta Mundi

No abstract provided.

The Genus Desmopachria Babington, Subgenus Portmannia Young (Coleoptera: Dytiscidae), Frank N. Young

Insecta Mundi

The subgenus Portmannia Young (1980) of the Neotropical genus Desmopachriais characterized by its ovate, sometimes almost globose body form, smooth shining integument between relatively fine punctures, and sexually dimorphic prostemal process. In the females the prosternal process comes to a point as in other members of Desmopachria, but in males the process is bifid or forked. The species are found from Texas and Arizona to Brazil in South America. They are particularly abundant in Mexico. A key is given for twelve species which are described and figured. The following species are described as new: decorosus (Mexico), goias (Brazil), pittieri …

A Report On A Collection Of Ceratopogonidae (Diptera) From Rondonia, Brazil. 2. Tribes Heteromuiini And Sphaeromiini, Gustavo R. Spinelli, Andrea Dippolito, Willis W. Wirth

Insecta Mundi

Examination of a large collection of Ceratopogonidae from Rondonia, Brazil, resulted in records of 11 species in the tribes Heteromyiini and Sphaeromiini, including the NEW GENUS Groganhelea Spinelli & Dippolito NEWGENUS, which is described herein, with its type-species G. rondoniensis Spinelli & Dippolito, NEW SPECIES. Heteromyia correntina Lane & Duret and Mallochohelea termophila (Spinelli) are recorded for the first time from Brazil.

Analyzing Correlations Of Three Types In Selected Lines Of Drosophila Melanogaster That Have Evolved Stable Extreme Geotactic Performance, Scott F. Stoltenberg, Jerry Hirsch, Stewart H. Berlocher

Department of Psychology: Faculty Publications

The behavior-genetic analysis of Drosophila melanogaster with geotactic performance as the phenotype is an ideal model system with which to investigate the complex relations between heredity and behavior. As part of a long-term, 38-year study, we report 4 experiments that identify and analyze trait correlations in the selected high- and low-geotaxis lines. We performed F₂ correlational analyses and backcrosses to examine 3 types of correlations: (a) genotype-genotype (alcohol dehydrogenase [Adh]-amylase [Amy]), (b) genotype-phenotype (Adh and Amy-geotaxis), and (c) phenotype-phenotype (mate preference–geotaxis). Only the Adh-geotaxis correlation survived meiosis and reappeared in the F …

Sperm Production In Boars After Nine Generations Of Selection For Increased Weight Of Testis, Thomas A. Rathje, R. K. Johnson, D. D. Lunstra

Department of Animal Science: Faculty Publications

Body, testis, and epididymis weights were recorded and homogenization-resistant sperm nuclei were counted to determine daily sperm production and the number of sperm stored within the cauda epididymis (CAUDASP) in 145 boars of a control line (C) and 128 boars of a line selected for increased predicted weight of testis (TS) at 150 d of age. Random samples of boars were evaluated at five ages between 70 and 450 d in Generation 8 and 15 ages between 70 and 296 d in Generation 9. Data were analyzed using an animal model that included the fixed effect of line and the …

Nebline, March 1995

NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County

Horticulture

Rural $ense

Family Living

4-H & Youth

Environmental Focus

Community & Leadership Development

Extension Calendar

Expanded Food and Nutrition Education Program (EFNEP)

Nebraska Association for Family and Community Education News

and other extension news and events

Restoration Of Circadian Behavior By Anterior Hypothalamic Heterografts, Patricia J. Sollars, Daniel P. Kimble, Gary E. Pickard

School of Veterinary and Biomedical Sciences: Faculty Publications

The suprachiasmatic nucleus (SCN) of the anterior hypothalamus (AH) is a circadian oscillator and an important component of the mammalian circadian system. To determine whether the SCN is the dominant circadian pacemaker responsible for generating a species-typical characteristic of circadian rhythms [i.e., period length (T)], neural transplantation was conducted using fetal AH donors of different species and SCN-lesioned (SCNx) hosts. The circadian behavior of each of the three donor species is clearly distinguishable by its species-typical T. The extent of SCN pacemaker autonomy was assessed by noting whether the period of the restored circadian rhythm following heterograft transplantation was characteristic …

Reproductive Structure And Organogenesis In A Cottonwood, Populus Deltoides (Salicaceae), Robert B. Kaul

School of Biological Sciences: Faculty Publications

The organogenesis of inflorescences, flowers, and fruits was followed for two years in a male and a female tree of eastern cottonwood, Populus deltoides. Soon after anthesis, an inflorescence for the next year is initiated as a continuation of the apical meristem in most axillary buds of the extension shoot of the current year. Bract and then floral primordia arise helically, and by the end of summer all floral appendages are evident. Individual perianth parts are evident early in ontogeny but not at anthesis; they are vascularized independently by distal traces of discrete vascular strands that also serve the …

The Prairie Naturalist Volume 27 , No. 1. March 1995

The Prairie Naturalist

DISTRIBUTION AND STATUS OF SAGE GROUSE IN COLORADO ▪ CE. Braun

BIRDS ASSOCIATED WITH BLACKBIRD SPRING FEEDING SITES IN SOUTH DAKOTA ▪ G.M. Linz, D.L. Bergman and W J. Bleier

INFLUENCE OF FORB ABUNDANCE ON WINTER BIRD USE OF CONSERVATION RESERVE PROGRAM FIELDS ▪ S.D. Hull, R.J. Robel and K.E. Kemp

FIRST NEST DOCUMENTATION FOR WHIP-POOR-WILL IN SOUTH DAKOTA ▪ K. L. Dean, D.L. Swanson, E.T. Liknes and D.P. Weinacht

WOOD DUCK POPULATION EXPANSION IN NORTHERN MONTANA ▪ DM. Prellwitz, J.R. Little, L.R. Rau and C.J. Hoff

PRAIRIE VOLES AT LOW DENSITY IN UNGRAZED TALLGRASS PRAIRIE IN THE FLINT HILLS …

Heavy Ion Track-Structure Calculations For Radial Dose In Arbitrary Materials, Francis A. Cucinotta, Robert Katz, John W. Wilson, Rajendra R. Dubey

Robert Katz Publications

The δ-ray theory of track structure is compared with experimental data for the radial dose from heavy ion irradiation. The effects of electron transmission and the angular dependence of secondary electron ejection are included in the calculations. Several empirical formulas for electron range and energy are compared in a wide variety of materials in order to extend the application of the track-structure theory. The model of Rudd for the secondary electron spectrum in proton collisions, which is based on a modified classical kinematics binary encounter model at high energies and a molecular promotion model at low energies, is employed. For …

Patterns Of Early Lake Ontogeny In Glacier Bay As Inferred From Diatom Assemblages, Sherilyn C. Fritz, Daniel R. Engstrom

Department of Earth and Atmospheric Sciences: Faculty Publications

We studied a series of recently formed lakes along a deglaciation chronosequence in Glacier Bay National Park to examine changes in water chemistry, primary production, and biotic composition that accompany the early ontogeny of north-temperate lakes. Successional trends in these freshwater ecosystems have been explored with a two-tiered approach that includes (1) the comparison of limnological conditions among lakes of known age and in different stages of primary catchment succession, and (2) the inference of water-chemistry trends in individual sites based on fossil diatom stratigraphy. This paper emphasizes the reconstruction of limnological trends from fossil diatom assemblages. The modem distribution …

Ard News February 1995

Agricultural Research Division: News and Annual Reports

CONTENTS:
COMMENTS FROM THE DEAN
CONGRATULATIONS
108TH ARD ANNUAL REPORT
GRANT AND CONTRACT INCOME OBTAINED BY ARD UNITS DURING THE LAST THREE CALENDAR YEARS
NEW OR REVISED PROJECTS
PROPOSALS SUBMITTED FOR FEDERAL GRANTS
GRANTS AND CONTRACTS RECEIVED DECEMBER 1994 AND JANUARY 1995
PATENTS AND THE ARD FACULTY
ARD GRANTS WRITING RESOURCES
AUTHORIZED UNIVERSITY SIGNATURES ON GRANT PROPOSALS
NORTH CENTRAL REGION SUSTAINABLE AGRICULTURE RESEARCH AND EDUCATION PROGRAM
NEBRASKA NETWORK 21 (NN 21)

Review Of Meant To Be Wild: The Struggle To Save Endangered Species Through Captive Breeding By Jan Deblieu, William Scharf

Great Plains Research: A Journal of Natural and Social Sciences (through 2013)

In the early 1970s, when I watched Frances Hamerstrom's initial attempts to achieve captive breeding of golden eagles, and later to induce red-tailed Hawks to complete most of their life cycle in captivity, I thought the practice to be only a novelty and biological sideline. I had no idea that the captive breeding and re-release of wild species into their natural environments would become such an accepted and important technique. Indeed this book documents many such attempts and some notable successes.

Review Of The Fishes Of Alberta (2nd Edition) By Joseph S. Nelson And Martin J. Paetz, R. A. Bodaly

Great Plains Research: A Journal of Natural and Social Sciences (through 2013)

This useful and attractive book is a much needed second edition of The Fishes of Alberta, first published in 1970. It is expanded and improved from the first edition and will be an essential reference for biologists working with the fishes of Alberta and surrounding areas, for those interested in the distribution of freshwater fishes in North America, and for anglers and the interested public as well.

The Fishes of Alberta is organized into two main sections. An introductory section has chapters on various types offish habitat in the different river basins and regions of Alberta, fish management and …

Review Of Colorado: The Place Of Nature, The Nature Of Place By Thomas P. Huber, A. David Hill

Great Plains Research: A Journal of Natural and Social Sciences (through 2013)

Colorado contains profiles of twelve distinctive places, which like the pieces of a jig-saw puzzle, fit together to form a mosaic that helps describe and explain the state's natural and, to a lesser extent, human history. The opening chapter introduces the lay reader to the broad themes of the state's physical geography-geology, landforms, climate, and vegetation. These topics are then typically covered with specific reference to each of the place profiles that constitute the remaining twelve chapters.

The most intriguing aspect of the book is the selection of the twelve places. Huber said he chose them "to inform, tantalize, and …

Water Current, Volume 27, No. 1, February 1995

Water Current Newsletter

Nonpoint Source Contamination: EPA Official Identifies Roadblocks to Successful NPS Management
From the Director: NSF Grant to Allow Launch of Statewide Science Program
NPS Pollution Management May Change
Stork Named to Water Council Position
Clean Water Act
Thoughts on Water: Winning Entries of the Water Current Nebraska High School Essay Contest
New Video Shows How to Sample Water
Annual Water Conference Deadline Near
Sheffield Receives Headgate Award
Planning for a Sustainable Future: The Case of the North American Great Plains
North Central Region: Water Quality Project Workshop

Quantifying Developmental Morphology Of Perennial Grasses, K. J. Moore, Lowell E. Moser

Department of Agronomy and Horticulture: Faculty Publications

Perennial forage grasses can be viewed as modular organisms. The phytomer is usually considered the basic unit of the grass plant and consists of a leaf blade and sheath, the internode, the node, and the associated axillary bud below the point of sheath attachment. The tiller is a collection of phytomers differentiated from a single apical meristem. The grass plant is a group of tillers that ultimately arise from a single zygote and are of the same genotype. A grass sward is a population of individual plants, often genetically related, but usually of unique genotypes. The developmental morphology of perennial …

Serendip Deborahae N. Gen. And N. Sp. (Eucestoda: Tetraphyllidea: Serendipidae N. Fam.) In Rhinoptera Steindachneri Evermann And Jenkins, 1891 (Chondrichthyes: Myliobatiformes: Myliobatidae) From Southeastern Ecuador, Daniel R. Brooks, Ramiro Barriga

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Cestodes collected in spiral valves of Rhinoptera steindachneri from the southern coast of Ecuador represent an undescribed species of Tetraphyllidea. The new species has bothridia possessing septa but lacking apical suckers. It is diagnosably distinct from all other tetraphyllidean genera by possessing a scolex comprising 4 triangular bothridia that are fused together forming a platelike structure, each of which is subdivided by 2 simple and 1 bifurcating septa radiating from its base and ringed by marginal loculi; therefore, a new genus is proposed for it. By exhibiting some degree of bothridial fusion, testes arranged in 2 layers in the proglottis …

Shape Recognition Method Using Morphological Hit-Or-Miss Transform, Prabir Bhattacharya, Weibin Zhu, Kai Qian

School of Computing: Faculty Publications

We present a new shape recognition algorithm for binary images based on the morphological approach. The standard algorithms based on the morphological hit-or-miss transform use block structure patterns, but in many practical situations, this may cause problems because the size of the object is unknown. In the proposed method, we match the corners of the object instead of the block structure pattern. Because most objects have different structure elements for the corners, our method gives a more reasonable approach and the size of the object plays a less significant role in our recognition algorithm than in the standard algorithms. Our …

Abundance Of Gulls And Other Birds At Landfills In Northern Ohio, Jerrold L. Belant, Thomas W. Seamans, Steven W. Gabrey, Richard A. Dolbeer

United States Department of Agriculture Wildlife Services: Staff Publications

We estimated the abundance of birds at three landfills in northern Ohio from May 1991-July 1992 recording 699,350 individuals of 42 species. Gulls (Larus spp.) comprised 94.5% of the birds recorded followed by European starlings (Sturnus vulgaris, 5.0%) and turkey vultures (Cathartes aura, 0.3%). Gulls were primarily of two species, ring-billed (L. delawarensis, 74.49%) and herring (L. argentatus, 25.50%). The mean number of gulls per observation during July-January was at least five times the mean number observed during other months. The combined monthly mean number of gulls at the three landfills peaked in August (>4000 birds), with gulls virtually …

Cloning And Characterization Of The Galactokinase Gene From Streptococcus Thermophilus, Azlin Mustapha, Robert W. Hutkins, Gerald W. Hirnstein

Department of Food Science and Technology: Faculty Publications

The objective of this research was to clone and characterize the galactokinase gene (gal0 from Streptococcus therrnophilus F4 10. Partially digested genomic DNA was cloned into pBR322 and transformed into galK Escherichia coli, and a galactose-fermenting transformant was isolated. Restriction analysis revealed that the transformant resulted from a Sau3A-HindIIl 4.0-kb fragment. Galactokinase activity in the recombinant was 10 times that of the parent strain. Analysis of the DNA squence showed the presence of a 1.3-kb open reading frame that had high homology with the galK gene from other organisms. A putative ribosome-binding site, start and stop codons, and -10 …

Silkworm Tfiiia Requires Additional Class Iii Factors For Commitment To Transcription Complex Assembly On A 5s Rna Gene, Timothy P.L. Smith, Lisa S. Young, Laurel B. Bender, Karen U. Sprague

Roman L. Hruska U.S. Meat Animal Research Center: Reports

We find striking similarities in promoter structure and requirements for template commitment on 5S RNA and tRNA genes from silkworms. The promoters are nearly the same size (-160 bp) and Include flanking as well as internal sequences. To analyze the factor requirements for 5S RNA transcription complex assembly in a completely homologous system, we have Isolated a silkworm fraction that is highly enriched for the 5S RNA-specific transcription factor, TFIIIA. Using this fraction, together with the other silkworm fractions, TFIIIB, TFIIIC, TF1IID and RNA polymerase III, we demonstrate that the requirements for 5S RNA transcription complex assembly are very similar …

Toward An Integrated Regional Research Program On Global Change And The Nation's Major Grasslands: Second Annual Report, Great Plains Regional Center-Nigec

School of Natural Resources: Faculty Publications

I DIRECTOR'S REPORT:

A GPRC Research Framework and Thrusts

B FY94 GPRC Grant Competition

C Synopsis of Current Projects 1 Thrust 1: Impacts of Climate Change 2 Thrust 2: Measuring and Modeling Net Carbon Exchange 3 Other Projects

D Summary and Recommendations of FY94 GPRC PI's Workshop 1 Biogeochemical Cycling Group 2 Climate Scenarios Group 3 Managed and Unmanaged Ecosystem Impacts Group 4 Scaling Group 5 Actions Prompted by the Workshop

E Research Integration with ARM-CART: Eco-ARM

F Future Directions for the GPRC

Appendix I-A: Biogeochemical Cycling Group Workshop Report • Appendix I-B: Climate Change Scenarios Group Workshop Report • …

Remote Sensing Of Chlorophyll In Lake Kinneret Using Highspectral- Resolution Radiometer And Landsat Tm: Spectral Features Of Reflectance And Algorithm Development, Yosef Z. Yacobi, Anatoly Giltelson, Meir Mayo

School of Natural Resources: Faculty Publications

High-resolution reflectance spectra in the range of 400-850 nm were obtained from Lake Kinneret during a period when dense populations of the dinoflagellate Peridinium gatunense dominated the phytoplankton. Chlorophyll (ChI) concentrations ranged from 5.1 to 185 mg m^-3 and from 2.4 to 187.5 mg m^-3 in the samples of two independent experiments. The most prominent features of the reflectance spectra were: (i) a wide minimum from 400 to 500 nm; (ii) a maximum at 550-570 nm, which did not surpass 3% in samples with high ChI concentration (>20 mg m^-3), indicating a strong absorption by …

Homosexual Rights And Citizen Initiatives: Is Constitutionalism Unconstitutional?, Richard F. Duncan, Gary L. Young

Nebraska College of Law: Faculty Publications

Grassroots initiatives like Amendment Two are the product of a populist revolt against restrictive homosexual rights laws. These initiatives are an attempt by the people to protect their basic civil liberties and to promote equal citizenship values. Homosexual rights legislation stigmatizes, marginalizes, and fences out groups and individuals who hold traditional beliefs about sexual morality. Citizen initiatives operate to remove this stigma and its harmful consequences by restoring government to a position of benign neutrality regarding competing visions of human sexuality.

When initiatives like Amendment Two are approved by vote of the people, they are likely to be challenged under …

Ec95-1249 Potato Production Stages: Scheduling Key Practices, Alexander D. Pavlista

University of Nebraska-Lincoln Extension: Historical Materials

Characterization of potato growth and development is important for the scheduling of production practices, yield prediction and hail loss insurance. Most past descriptions emphasize above-ground vine growth, and neglect below-ground tubers. Recently, growth stages have been described integrating both practices to them. This circular describes stages of potato production and indicates key practices at each stage.

Ec95-1561-D Insect Management Guide For Nebraska Sugarbeets, Dry Beans, Sunflowers, Vetch, Potatoes, And Onions, G. L. Hein, R. J. Wright, F. P. Baxendale

University of Nebraska-Lincoln Extension: Historical Materials

Extension Circular 95-1561-D: This circular is a guide for the insects which plague the sugarbeets, dry beans, sunflowers, vetch, potatoes, and onions grown in Nebraska. The circular details the common insects of the different crops and how they should best be managed by the farmers growing the crops in Nebraska.

Neotropical Migrant Birds, Douglas H. Johnson

United States Geological Survey, Northern Prairie Wildlife Research Center: Publications

The latest vogue in bird conservation is concern over species that breed in the United States and Canada but winter mostly south of the United States-Mexico border. Many neotropical migrant birds have declined in number recently (although many have not). It is perhaps convenient to blame deforestation and other environmental abuses in the tropics for the declines in "our" birds, rather than to look inward at the abuses we in the United States have inflicted. Nonetheless, the concern about neotropical migrants, institutionalized by the Partners in Flight program, has served several purposes. For one, biologists are taking a broader view …

Factors Associated With Duck Nest Success In The Prairie Pothole Region Of Canada, Raymond J. Greenwood, Alan B. Sargeant, Douglas H. Johnson, Lewis M. Cowardin, Terry L. Shaffer

United States Geological Survey, Northern Prairie Wildlife Research Center: Publications

Populations of some dabbling ducks have declined sharply in recent decades and information is needed to understand reasons for this. During 1982-85, we studied duck nesting for 1-4 years in 17 1.6 by 16.0-km, high-density duck areas in the Prairie Pothole Region (PPR) of Canada, 9 in parkland and 8 in prairie. We estimated nest-initiation dates, habitat preferences, nest success, and nest fates for mallards (Anas platyrhynchos), gadwalls (A. strepera), blue-winged teals (A. discors), northern shovelers (A. clypeata), and northern pintails (A. acuta). We also examined the relation of mallard …

Contributions Of The Conservation Reserve Program To Populations Of Breeding Birds In North Dakota, Douglas Johnson, Lawrence Igl

United States Geological Survey, Northern Prairie Wildlife Research Center: Publications

Previous studies have shown that habitat provided by the Conservation Reserve Program (CRP), a feature of the 1985 farm bill, is used by many birds. The present study quantitatively assesses the importance of the CRP by estimating changes in breeding bird populations of North Dakota projected if CRP land would revert to cultivation. Of 18 species that were common in CRP or crop fields or both, 12 were more abundant in CRP habitats. Six of these species had suffered significant population declines during 1967-1990, according to the North American Breeding Bird Survey. In contrast, none of the six species that …