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Effect Of The Payment-In-Kind (Pik) Program On The Psorophora Columbiae Mosquito Population Of A Northeast Arkansas Ricefield Community, Larry A. Olson, Julia L. Reid

Journal of the Arkansas Academy of Science

No abstract provided.

Influence Of Degray Reservoir On Zooplankton Populations In The Caddo And Ouachita Rivers, Ralph B. Roseberg, Mark Karnes

Journal of the Arkansas Academy of Science

No abstract provided.

Changes In The Lower Chesapeake Bay Food-Chain In Presence Of The Sea Nettle Chrysaora-Quinquecirrha (Scyphomedusa), David Feigenbaum, Michael Kelly

OES Faculty Publications

The abundance of 4 levels of the lower Chesapeake Bay food chain (Chlorophyll a, herbivores, ctenophore Mnemiopsis leidyi, and Scyphomedusa Chrysaora quinquecirrha) were moni­tored twice weekly at 4 stations from May 10 through Sep 30, 1982 in the Lafayette and Elizabeth Rivers (Virginia). The herbivore standing stock, largely copepods, declined sharply in late May when M. Jeidyi appeared, but rebounded a month later when C. quinquecirrha medusae reduced the ctenophore population. Despite the additional presence of Aurelia aurita (Scyphomedusa) from Jul onward, herbivore abundance remained at moderate levels until the end of the study period. Phytoplankton abundance fluctuated …

Security Of Infantile Attachment As Assessed In The Strange Situation: Its Study And Biological Intrepretation, Michael E. Lamb, Ross A. Thompson, William P. Gardner, Eric Charnov, David Estes

Biology Faculty & Staff Publications

We study the Ainsworth 'Strange Situation' procedure to assess attachment between infant and parent, and intrepret individual variation in terms of modern human behavioral ecology ( sociobiology)

Effects Of Castration And Electrical Stimulation On Beef Carcass Quality And Palatability Characteristics, S. Kalstrup, H. R. Cross, B. D. Schanbacher, R. W. Mandigo

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Thirty bull and 30 heifer Hereford x Simmental calves were weaned at approximately 5 mo of age and assigned randomly to one of the following treatments: intact, conventionally castrated or luteinizing hormone-releasing hormone-immunized (LHRH). All animals were slaughtered at 16 mo of age and the right side of each carcass was electrically stimulated (ES) or restimulated (RES). Yield and quality grades were determined on both right and left sides after 24 h chilling. Longissimus muscles (LD) were obtained at 7 d postmortem for objective color measurements, chemical analysis, shear force and trained sensory panel evaluation. Semitendinosus muscles (ST) were also …

A Bryological Survey Of Southwestern Nebraska, Linda L. Spessard

Transactions of the Nebraska Academy of Sciences and Affiliated Societies

During the summer of 1982, moss collections made in Chase, Dundy. Frontier, Furnas, Gosper, Hayes, Hitchcock, Hooker, Lincoln, Logan. McPherson, Perkins, and Red Willow counties of Nebraska comprised 21 species. These reports bring the number of moss species known from southwestern Nebraska to 27 in addition to 5 liverwort species.

Transactions Of The Nebraska Academy Of Sciences Volume Xii (1984): Table Of Contents

Transactions of the Nebraska Academy of Sciences and Affiliated Societies

Nebraska Academy of Sciences, Officers, Policy Committee ......... ii

Editorial Board, Instructions to Contributors ......... v

Membership Objectives and Friends of the Academy ......... vi

Biological and Medical Sciences

Paulisentis missouriensis Keppner, 1974 (Acanthocephala) in creek chubs, Semotilus atromaculatus, of southeastern Nebraska (Buckner, Oetinger, and Buckner) ......... 1

Relationships between vegetation, soils, and pocket gophers in the Nebraska Sand Hills (K. J. Kjar Hirsch and J. Stubbendieck) ......... 5

Prevalence and relationships of two allocreadiid metacercariae in the burrowing mayfly, Hexagenia limbata (Serville in Guerin), of Bluestem Lake, Lancaster County, Nebraska (J. M. Moul) ......... 13

A bryological survey …

The Life History And Agricultural Importance Of The Small Lucerne Weevil, (Atrichonotus Taeniatulus (Coleoptera : Curculionidae) In Western Australia, Robert Emery

All other publications

The small lucerne weevil, Atrichonotus taeniatulus, has caused considerable damage to lucerne and subterranean clover in recent years. This study reviews the taxonomy of the insect, the damage it causes and the various stages of its life cycle

Evaluation Of Peptide Assimilation In Ehrlich Ascites Tumor Cells, John M. Castellano

Biological Sciences Theses & Dissertations

The dipeptides glycyl-L-(³H)-leucine and L-phenylalanyl-L-(³H)-leucine were synthesized in radioactive form and utilized in the analysis of peptide transport and hydrolysis by Ehrlich ascites tumor cells. The tumor cells were cultured in the abdominal cavity of CF-1 albino mice and harvested into sterile isotonic buffer for all experimental analyses.

The results of this study reveal that the tumor cells rapidly accumulate radiolabel when incubated with the above mentioned peptides, but that the peptide is most probably hydrolyzed extracellularly and free L-(³)-leucine transported. This hypothesis is based on the observations of reduction in accumulation of radiolabel …

A 'Natural Herbicide' Against Calotrope?, A H. Cheam

Journal of the Department of Agriculture, Western Australia, Series 4

Buffel grass produces a chemical compound which is toxic to the growth of calotrope seedlings, a declared weed in Western Austrsalia north of the 26th parallel. This new discovery id highly significant in view of the increasing emphasis now placed on weed management as opposed to weed control and the desire to use fewer pesticides.

Research On Declared Plants And Other Weeds, G. A. Pearce

Journal of the Department of Agriculture, Western Australia, Series 4

Knowledge about weeds is necessary to assess their significance, devise control measures and to select those which are to be declared for the purposes of the Agricultural and Related Resources Protection Act.

Once a plant has been declared in Western Australia, all landowners must control and prevent its spread to new areas and work towards eradicating known infestations. The Act also declares plants which are prohibited from entering the State.

It is becoming more and more important to provide specific reasons for the declaration of a weed and its placement in a certain category. Such decisions require appropriate action to …

Nitrogen Flows From Several Species And Varieties Of Legume, John Hamblin Dr

Experimental Summaries - Plant Research

Trial 83C24: N flows from several species and varieties of legume.

Trial 83C27: The effect of seeding rate, planting and variety on the residual value of lupins.

Trial 84C25: Small rotation trial for 1985.

Trial 84C34: Nitrogen response on large rotation plots at ECRS.

These trials were carried out in collaboration with: Mr R. Delane, and with assistance from: Mr. T. White, Ms. A. Bishop.

Investigation Of Root And Foliar Diseases Associated With Decline In Wheat Yields On Sandplain, Jill Wilson

Experimental Summaries - Plant Research

A Wheat Industry Research Council Project. In 1984 research was conducted in collaboration with Dr John Hamblin, Dr Allan Brown, Mr Rob Delane and Dr Mark Sweetingham. 1. Field Trial (GE84Cl5): Interactions between disease and agronomic factors, particularly rotation with lupins, and deep tillage. ( i) Yields, (ii) Incidence of root diseases, (iii) Root length and diseased root length, (iv) Leaf disease. 2. Farm Survey (sites from trial 84GE57 of Dr Allan Brown) Incidence of Common Root Rot

Mutations, The Abberant Ratio Phenomenon, And Virus Infection Of Maize, Myron K. Brakke

Department of Plant Pathology: Faculty Publications

Viruses interact genetically in various ways with bacterial and animal hosts, e.g. by lysogeny in bacteriophage and by incorporating a DNA copy of retrovirus RNA into the host genome. These phenomena lead to mutations, to the transfer of host genes by viruses, and to latent viruses being transmitted from generation to generation essentially as host genes. In contrast, there are no known examples of the incorporation of viral genomes into plant DNA.

Spontaneous Deletion Mutation Of Soil-Borne Wheat Mosaic Virus Rna Ii, Yukio Shirako, Myron K. Brakke

Department of Plant Pathology: Faculty Publications

The wild-type (WT) isolate of soil-borne wheat mosaic virus has two species of rodshaped virions 281 nm and 138 nm in length, which are designated as virions 1∙0L and 0∙5L, respectively. We reported previously that virions shorter than 0∙5L arose in assay plants inoculated with separated and recombined 1∙0L RNA and 0∙5L RNA and suggested that these short virions were caused by deletion mutation of 0∙5L RNA. We now report that these short virions arose after a period of several months in wheat plants that had been inoculated manually with unpurified WT isolate, and also when plants infected naturally in …

Reduction Of Ferric Leghemoglobin In Soybean Root Nodules, Keuk-Ki Lee, Robert V. Klucas

Department of Biochemistry: Faculty Publications

Reduction of ferric leghemoglobin to ferrous leghemoglobin in soybean nodules (Glycine max [L.] Meff. cv Woodworth) was studied using a spectrophotometer equipped with an in-cell space diffuse reflectance accessory. Nodule slices prepared and scanned under nitrogen gas showed a ferrous leghemoglobin absorption spectrum. Nodule slices equilibrated with 100% O₂ or air exhibited two absorption bands characteristic of oxygenated leghemoglobin. The addition of CO shifted those bands to CO leghemoglobin absorption bands. Potassium ferricyanide was not effective in oxidizing ferrous to feffic leghemoglobin in nodule slices. However, ferric leghemoglobin was formed by treating the nodule slices with hydroxylamine, and …

Catabolite Repression Of Chloroplast Development In Euglena, Antonio F. Monroy, Steven D. Scheartzbach

School of Biological Sciences: Faculty Publications

Two-dimensional gel electrophoresis resolved total cellular protein from Euglena gracifis Klebs var. bacillaris Cori into 640 polypeptides detectable by silver staining. The addition of 84 mM ethanol to dark-grown resting carbon- starved cells increased the relative amounts of 6 polypeptides and decreased the relative amounts of 3 polypeptides. The addition of 84 mM malate to resting cells increased the relative amounts of 3 of the ethanol-induced polypeptides, suggesting that the induction of these polypeptides represents a generalized response to the provision of a utilizable carbon source, a nutritional shift up, rather than a specific response to ethanol addition. Exposure of …

Herbivore Effect On Stature, Fruiting, And Leaf Dynamics Of A Native Crucifer, Svata M. Louda

Svata M. Louda Publications

The impact of a native, leaf-feeding chrysomelid beetle (Phaedon sp. nr. oviformis) on bittercress (Cardamine cordifolia: Cruciferae), was evaluated in an exclusion experiment. Multivariate statistical analysis showed a significant increase in plant performance in the rotenone exclusion compared to performance in the paired control treatment. Plant response to the reduction of herbivory was a complicated, interrelated syndrome of changes. When insects were excluded, the amount of missing leaf area decreased significantly (3.6-fold; 3.2-0.9 cm² per plant), and the total leaf area increased 5.7-fold (12.9-73.4 cm² per plant). Plant height (5.7-20.3 cm) and fruit production …

Inflorescence Architecture And Evolution In The Fagaceae, Robert B. Kaul, Ernst C. Abbe

School of Biological Sciences: Faculty Publications

First paragraph:

Inflorescence architecture is receiving increasing attention with respect to its role in the life of plants, but much remains to be learned of its effects on pollination and dispersal biology (see Wyatt, 1982). Little is known of the biology of fagaceous inflorescences or of their relationships with the growth or the reproductive patterns of the trees. Most studies (Abbe, 1974; Macdonald, 1979; Fey & Endress, 1983) have concentrated on the nature of the flower clusters (often called dichasia or partial inflorescences) and cupules. Hjelmqvist (1948) and Soepadmo (1972) briefly reviewed the variety of inflorescences in the Fagaceae. Čelakovský …

Helminth Parasites Of The Endangered Houston Toad, Bufo Houstonensis Sanders, 1953 (Amphibia, Bufonidae), Robert A. Thomas, Steven A. Nadler, W. Lynn Jagers

Harold W. Manter Laboratory of Parasitology: Faculty Publications

The Houston toad, Bufo houstonensis Sanders, has an extremely restricted range in southeastern Texas, being known historically from 6 counties with viable populations remaining in only 2, Due to its relative rarity and federally protected status as an endangered species, its parasites have received attention only once. Harwood (1932, Proc. U.S. Natl Mus. 81: 1-71) identified 2 Harris County specimens of this toad as B. terrestris and reported Cosmocercoides dukae (Oxyuridae) in both and Oswaldocruzia pipiens (Diaphanocephalidae) in 1. In the course ofecological studies on the Houston toad, additional information on its parasitic helminths has been acquired.

Trematode Parasites Of Marine Birds In Antarctica: The Distribution Of Gymnophallus Deliciosus (Olsson 1893), Eric P. Hoberg

Harold W. Manter Laboratory of Parasitology: Faculty Publications

During continuing studies of avian helminths at Palmer Station, Antarctica (Hoberg 1983) trematodes were found as parasites only of charadriiform birds. Digeneans were not represented in extensive collections (including several thousand specimens of helminths) from spheniscids, procellariids, and phalacrocoracids.

The pattern of distribution of trematodes in marine birds in Antarctica is influenced by the availability of suitable intermediate hosts (mollusca) and the foraging behavior of potential final hosts. Littoral environments near Palmer are structurally simple and of low diversity due to ice scouring. The limpet, Nacella polaris, is the dominant intertidal invertebrate and one of the few molluscs that …

Breeding Birds In Cedar Stands In The Great Dismal Swamp, Karen A. Terwilliger, Robert K. Rose

Biological Sciences Faculty Publications

The Great Dismal Swamp located in the coastal plain on the Virginia- North Carolina border, has long been recognized as a vegetationally distinctive region with many unusual geological and biological features. Formerly at least twice the currently estimated size of 85,000 hectares (Carter 1979), the Great Dismal Swamp is still shrinking because of a dropping water table caused by more than 200 years of logging, ditching, and other human activities. In 1973, the Union Camp Corporation donated a 19,871-hectare tract located near Suffolk, Virginia. to The Nature Conservancy, which transferred the land to the U.S. Fish and Wildlife Service. This …

Angularella Audubonensis Sp. N. (Dilepididae) And Other Cestodes Of Cliff Swallows In Colorado, Jeffrey D. Stamper, Gerald D. Schmidt

Harold W. Manter Laboratory of Parasitology: Faculty Publications

One hundred forty-five cliff swallows, Petrochelidon pyrrhonota, were examined for cestodes in two separate surveys in Weld County, Colorado. Seven species representing four genera were found. Angularella audubonensis sp. n. is differentiated by the small size of the rostellar hooks (8.4-13.5 μm) and the medial relationship of the cirrus pouch to the osmoregulatory canals. Other species collected were Angularella beema, Anonchotaenia globata, Mayhewia ababili, Vitta magniuncinata, Vitta parvirostris and Vitta riparia. Seven new hosts and geographic distribution records were established for Colorado, and six new records were determined for North America.

Manipulation Of Endogenous And Exogenous Hormones For Red Meat Production, Bruce D. Schanbacher

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Growth and development of domestic livestock for red meat production are often discussed in the context of environmental factors, nutritional requirements, genetic potential and the anabolic agents affecting production efficiency. In this minireview, the effects of endogenous and exogenous hormones on animal growth are reviewed. The pituitary, pancreatic and gonadal hormones known to affect growth and(or) carcass composition are cited to illustrate and place into perspective the important contributions that the endocrine system makes to animal production. Manipulation of endogenous hormones through 1) administration of synthetic releasing and inhibiting peptides and 2) immunoneutralization techniques, will likely provide the livestock producer …

Pituitary-Testicular Responses Of Estradiol-17Β-Implanted Bull Calves To Continuous Versus Pulsatile Infusion Of Luteinizing Hormone Releasing Hormone, Bruce D. Schanbacher

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

The luteinizing hormone (LH), folliclestimulating hormone (FSH) and testosterone response of bull calves implanted with estradiol-17β to continuous and pulsatile infusion of luteinizing hormone releasing hormone (LHRH) has been examined. Estradiol-17β reduced serum LH and FSH concentrations and suppressed testosterone secretion and testicular growth when compared with sham-implanted bulls. Putsatile iv infusion of LHRH [500 ng every 2 h (6 μg/d)] for a 4-wk period to estradiol-17β- implanted bulls resulted in elevated mean serum LH and testosterone concentrations that were characterized by discrete secretory episodes. Mean serum FSH was also increased by LHRH pulse infusion, but LHRH-coup!ed secretory episodes were …

Use Of Skelettochronology In Age Determination Of American Toads (Bufo Americanus) From East Central Illinois, Philip M. Acker

Masters Theses

A skelettochronological technique was applied to the phalanges of the American toad, Bufo americanus, from east central, IL. In hematoxylin-stained cross-sections of the phalanges, suspected year rings are formed which can be used to age individuals. This method allows for aging without destructive sampling of toad populations.

A majority of the male toads from two choruses were estimated to be 2 or 3 years old, while most of the females from the same two sites were in the 3 or 4 year age class. Females were larger than males in the 3 and 4 year age classes, and overall, …

Operant Conditioning In The Water Snake (Nerodia Sipedon), Angela R. Deitz

Masters Theses

Six subjects of Nerodia sipedon were tested for runway acquisition. Five of six subjects met criterion for runway learning, demonstrating a significant decrease over the 25 day testing period in mean latency and running times. Four subjects completed 170 trials in a T-maze to test two-choice discrimination and reversal learning. All subjects met criterion for the initial discrimination and one reversal while two subjects completed four reversals and one subject met criterion for six reversals. Results are similar or superior to those previously reported for reptiles and other non-human vertebrates.

Operant Conditioning In The Psittacine, Amazona Amazonica, Gloria J. Nadolski

Masters Theses

Two Orange-winged Amazon Parrots, (Amazona amazonica) were subjected to operant conditioning involving three tests: two-choice spatial discrimination and reversal, three-choice color discrimination and reversal, and the oddity principle. Results of the habit reversal tests were compared to those of Gossett (1968) to determine the phylogenetic ranking of the learning capabilities of psittacines. In the first two habit reversal tests, the subjects completed twenty reversals using sunflower seeds as positive reinforcements. In the oddity principle test, the parrots completed the equivalent of 20 reversals, again using sunflower seeds. Criterion was met when they completed 8 consecutive correct choices with …

Juglans Cinerea: The American White Walnut, Dennis Robert Hattermann

Masters Theses

The American white walnut Juglans cinerea L. is a native North American tree in the Juglandaceae, or walnut family. It prefers rich, moist, rather neutral to slightly basic lowland soils. This is an in depth study of its taxonomy, morphology, anatomy, age, size, growth habit, distribution, ecology, propagation, economic importance, medicinal uses, toxicity, folklore, diseases and pests, and chemical constituents.

J. cinerea L. is monoecious and confined in its distribution to the eastern and central parts of North America. It can be easily identified by its large, pinnately compound leaves and ashy-gray bark with broad, flat plates and deep furrows. …

A Comparison Of The Temporal Spawning Distributions And Growth Rates Of Young-Of-The-Year Redear Sunfish (Lepomis Microlophus) And Bluegill (Lepomis Macrochirus) In Three Illinois Impoundments, Craig Douglas Schmittler

Masters Theses

The purpose of this study was to compare the temporal spawning distribution and growth rates of bluegill (Lepomis macrochirus) and redear sunfish (Lepomis microlophus) in Illinois impoundments. Otolith sagittae were used to age the fish and to determine the intervals of successful spawning for both species.

Readear sunfish initiated spawning slightly before or a the same time as bluegill; however, bluegill spawned for twice as long as redear sunfish in all study impoundments. The earliest spawned fish of both species showed the fastest growth and the earliest spawned redear sunfish grew faster than did the earliest …