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Summary Of The Status Of Harvest Mice, Cricetidae: Reithrodontomys, In Arkansas, V. Rick Mcdaniel, John C. Huggins, James A. Huggins, Michael W. Hinson

Journal of the Arkansas Academy of Science

Although four species of harvest mice, Reithrodoniomyx, are known to occur in Arkansas, the distributional status of the genus in the state is poorly understood. Recent museum specimens significantly extend the range of R. megalotix and R. fulvescens in the state. R. megalotis is shown to range south through Phillips Co. in eastern Arkansas, and R. fulvescens is shown to range throughout most of the state, now including most of the Mississippi Alluvial Plain. A new specimen of R. humulis from Delaware Co., Oklahoma, suggests that this species probably ranges throughout northwestern Arkansas. R montanus remains known only from Washington …

Fishes Of Morrow Creek, A Lower Ouachita River Tributary, In Southern Arkansas, Henry W. Robison, Stephen A. Winters

Journal of the Arkansas Academy of Science

The fishes of Moro Creek, a fifth order stream tributary of the lower Ouachita River in southern Arkansas, were sampled from 1972-1977. Field collections, literature records and museum records revealed a total of 63 species representing 14 families. An undescribed cyprinid, the bluehead shiner, is reported from Moro Creek for the first time. In general, longitudinal zonation of fish species was apparent as species diversity increased downstream. Stream inhabitants were typical Coastal Plain fishes of the lower Ouachita River system.

Influence Of Lead, An Environmental Pollutant On Metamorphosis Of Rana Utricularia (Amphibia: Ranidae), Gloria L. Yeung

Journal of the Arkansas Academy of Science

The influence of lead, an environmental pollutant on metamorphosis of Rana utricularia, was examined in this study. Larvae of stage XI (Taylor and Kollros, 1946), beginning of the premetamorphic stage, were exposed to lead concentrations of 0.1 ppm, 0.5 ppm, 1.0 ppm and 1.5 ppm for 106 days. The untreated larvae served as controls. Larvae were observed from early limb bud stage, stage X, through the protrusion of the forelimbs, stage XX. Neither the sequence of developmental events nor the gross external and internal morphology was altered by lead. However, lead prolonged the time of metamorphosis by delaying the completion …

Unusual Accumulation Of Bat Remains From An Ozark Cave, David A. Saugey, R. H. Baber, V. Rick Mcdaniel

Journal of the Arkansas Academy of Science

No abstract provided.

Age And Growth Of Carp From Beaver Reservoir, Arkansas, Raj V. Kilambi, Walter R. Robison

Journal of the Arkansas Academy of Science

No abstract provided.

Some Physiological And Morphological Adaptations For Underwater Survival In Natrix Rhombifera And Elaphe Obsoleta, Dennis A. Baeyens, Chris T. Mcallister, Leland F. Morgans

Journal of the Arkansas Academy of Science

The submergence times of the diamondback water snake (Natrix rhombifera) and black rat snake (Elaphe obsoleta) were compared. Both species could easily survive underwater for periods greater than one hour. Furthermore, there was no difference in time of underwater survival in the two species. Some physiological and morphological parameters which may contribute to the ability of N. rhombifera and E. obsoleta to remain submerged were also examined. E. obsoleta was found to have a greater lung volume and larger and more numerous alveoli than N. rhombifera. Both species demonstrated a bradycardia upon submergence but it was less pronounced than the …

Bvr-1, A Restriction Locus Of A Type C Rna Virus In The Feline Cellular Genome: Pleiotropic Restriction Of Endogenous Balb Virus In Cat X Mouse Somatic Cell Hybrids, Stephen J. O'Brien, Janice M. Simonson

Biology Faculty Articles

Bvr-1 is a dominant X-linked feline gene which restricts the replication of B-tropic murineleukemia virus (B-MuLV) in somatic cell hybrids between murine BALB/c-RAG cells and FL-74 feline cells. Since the hybrids were originally derived by the hypoxanthine aminopterin thymidine selection scheme, counter selection experiments on 6-thioguanine result in preferential survival of hybrid cells which have spontaneously lost the feline X-chromosome on which is located the structural gene for hypoxanthine guanine phosphoribosyl transferase (IMP: pyrophosphate phosphoribosyl transferase, E.C. 2.4.2.8) and Bvr-1. Back selected Bvr-1^- cells express high parental levels of B-MuLV. Bvr-1^- effectively restricts the IdU-mediated induction of …

Purification Of Some Legume Carlaviruses, Venkateswarlu Veerisetty, Myron K. Brakke

Department of Plant Pathology: Faculty Publications

Purification schemes were developed which yielded 0.7 to 1.0 mg of alfalfa latent virus (ALV) and pea streak virus (PSV) and 0.1 to 0.3 mg of red clover vein mosaic virus (RCVMV) per gram pea cullivar Lincoln ) plant tissue (excluding roots). The freezing of the tissue and the use of an appropriate extraction buffer were crucial. Virus from sap was precipitated by 6%(w/v) polyethylene glycol (PEG, MW 6,000) and concentrated by two cycles of differential centrifugation. Partially purified virus preparations had a single nucleoprotein component in rate-zonal sucrose and equilibrium cesium chloride density gradient centrifugation. The virus preparations did …

Glycerol Permeability In Erythrocytes Of Peromyscus Californicus : The Effect Of Temperature, James K. Vanarsdel

University of the Pacific Theses and Dissertations

The present work was done to determine the effect of temperature of the half-saturation constant (ø) and the maximum transport rate (K) of the facilitated diffusion of glycerol across the erythrocyte membrane of Peromyscus californicus.

Experimental Studies Of Interactions Between Zostera Marina And The Associated Benthic Fauna, David Marshall Penny

University of the Pacific Theses and Dissertations

The objectives of the present study are to: (1) Describe the macro-invertebrate species composition and seasonal changes in abundance of the benthic infauna within an eelgrass bed; (2) Observe what immediate effects occur to the benthic community as a result of experimental removal of eelgrass plants from plants within the Zostera bed; (3) Measure the seasonal variation of eelgrass turion length over an annual cycle and determine its correlation to biomass (dry weight); (4) Examine, by means of field experiments, the importance of incident solar irradiation in affecting the seasonal growth of Zostera; and (5) Determine the relationship, if any, …

Sex-Ratio Selection In Eusocial Hymenoptera, Eric Charnov

Biology Faculty & Staff Publications

No abstract provided.

Testicular Steroid Secretion In Response To Gnrh-Mediated Lh And Fsh Release In Bulls, B. D. Schanbacher, S. E. Echternkamp

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

Assay of frequently collected blood samples in four mature Hereford bulls indicated the existence of a tonic mechanism for the secretion of luteinizing hormone (LH) and follicle stimulating hormone (FSH), i.e., their episodic release was not observed. Increased plasma concentrations of LH and FSH, however, were obtained in response to an intravenous injection of 500 µg of gonadotropin releasing hormone (GnRH). These gonadotropins showed similar secretory profiles after GnRH, but the relative magnitude of the LH response (30-fold) was considerably greater than that of the FSH response (sevenfold).

Concentrations of testosterone in jugular and spermatic vein blood were increased sevenfold …

Climatic Change And The Extinction Of Large Mammals During The Quaternary, C. Bertrand Schultz, John M. Hillerud

Transactions of the Nebraska Academy of Sciences and Affiliated Societies

There is an abundance of soils and paleosols as well as terraces and terrace fills and erosional forms of pediments to aid in working out a precise stratigraphic sequence for the Quaternary animals. The dating and correlation of Quaternary deposits are complex, and we must realize that there were numerous glacial advances and retreats. A continuing reexamination of the relationship of the mammalian faunas to the paleosols, terrace fills, volcanic ashes, and other geologic features must be done in order to provide a proper framework for the interpretation of the mammalian stratigraphic sequences.

The horses and camels, which had so …

The Classical European Glacial Stages: Correlation With Deep-Sea Sediments, George Kukla

Transactions of the Nebraska Academy of Sciences and Affiliated Societies

Four glacials and three interglacials, recognized by classical Alpine and North-European subdivisions of the Pleistocene, were correlated with continuous oxygen-isotope records from the oceans using loess sections and terraces as a link (Fig. 15). It was found that the Alpine "glacial" stages are represented by sediments formed during both glacial and interglacial climates, that the classical Alpine "interglacial" stages do not represent episodes of interglacial climate but probably intervals of accelerated crustal movements, and that the physical evidence on which the North-European classical subdivision is based is misinterpreted due to lengthy gaps in the record.

It is recommended to discontinue …

The Origins Of Spring Migratory Staging By Sandhill Cranes And White-Fronted Geese, Roger S. Sharpe

Transactions of the Nebraska Academy of Sciences and Affiliated Societies

A most unusual avian migratory event takes place each spring in the Platte River basin of Nebraska between 98 and 102 degrees longitude (Fig. 1). In suitable habitats throughout this area large concentrations of Sandhill Cranes, Grus canadensis, and White-fronted Geese, Anser albifrons, develop and achieve peak populations in mid to late March. This phenomenon is traditional to the migratory habits of specific populations and occurs during the spring movement from wintering grounds in Texas, New Mexico, and Mexico to breeding grounds far to the north in Canada and Alaska. In both species groups of individuals drift in …

Excavations At Natural Trap Cave, Larry D. Martin, B. Miles Gilbert

Transactions of the Nebraska Academy of Sciences and Affiliated Societies

Among the more important questions addressed by students of earth history are those that relate to climatic change. This is especially true of change that has taken place during the last two million years of the "Ice Age." It is not an accident that a great deal of effort has been directed towards the Late Pleistocene, and our knowledge of Late Pleistocene environmental parameters has increased markedly in the past few years. However, our knowledge of these changes is still incomplete, and we still have some uncertainty about the cause and nature of Late Pleistocene climatic change, its possible relationship …

Transactions Of The Nebraska Academy Of Sciences Volume Vi (1978): 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

Symposium: "The Ice Age- When dd it begin and has it ended"

Cochairmen: John F. Shroder, Jr. and Lloyd G. Tanner

The comparative method in stratigraphy: the beginning and end of an ice age (T. M. Stout) .......... 1

The Plio-Pleistocene: sediments, environments, and geochronology along the Karari Escarpment, East Turkana, Kenya (Vondra, Burggraf, Jr., and White) .......... 19

Chronology of some Late Cenozoic deposits from the central United States and the Ice Ages (J. D. Boellstorff) .......... 35

Progress on rock glacier research …

The Interaction Of Thioxanthenones With Nucleic Acids, Laszlo Bodoni

Dissertations

No abstract provided.

Lactose Variability Of Escherichia Coli In Thermally Stressed Reactor Effluent Waters, K. L. Kasweck, C. B. Fliermans

Ocean Engineering and Marine Sciences Faculty Publications

Lactose-utilizing and nalidixic acid-resistant populations of Escherichia coli, having an optimum growth temperature of 370C, were placed in modified diffusion chambers. The chambers were submerged in the epilimnion and hypolimnion of a 1,100-hectare lake (Par Pond) which receives cooling water from a nuclear production reactor. Control chambers were placed in a deep-water reservoir and a Flowing-Streams Laboratory, both of which had comparable temperatures to Par Pond. The populations of E. coli were sampled regularly for up to 3 weeks. Viability of the bacteria was determined by dilution plating to nutrient agar followed by replicate plating onto selective medium to determine …

Relating Wolf Scat Content To Prey Consumed, Theodore J. Floyd, L. David Mech, Peter A. Jordan

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

In 9 trials, captive wolves (Canis lupus) were fed prey varying in size from snowshoe (Lepus americanus) to adult deer (Odocoileus virginianus), and the resulting scats were counted. collectible scats were distinguished from liquid, noncollectible stools. In collectible scats, the small prey occurred in greater proportion relative to the prey's weight, and in lesser proportion to the prey's numbers, than did the remains of larger prey. A regression equation with an excellent the data (r² = 0.97) was derived to estimate the weight of prey eaten per collectible scat for With this information …

Review Of The Pheasants Of The World, Paul A. Johnsgard

Papers in Ornithology

This book, one of Delacour's three major monographs on avian families (the others being the Anatidae and, with Dean Amadon, The Cracidae), was originally published in 1951 but went out of print in the late 196Os, when it quickly became a collector's item. At the request of the World Pheasant Association, an avicultural organization concerned with galliform conservation, Delacour undertook a revision of the book, and a new colored plate has been prepared by R. David Digby. That Delacour, now in his late 80's, should undertake such a project at all is a testimony to the amazing vigor and enthusiasm …

Zoogeography Of Antillean Bats, Robert J. Baker, Hugh H. Genoways

University of Nebraska State Museum: Mammalogy Papers

Analysis of the bat fauna of the Antillean Islands suggest that the most probable source of invasion of the islands by bats is by overwater dispersal. The bat fauna of ·the Greater Antilles is unique, a percentage of endemism on each island being over 50 percent except for the Virgin Islands which has 33 percent endemics.

The richest bat fauna in the Antilles is on Cuba (32 species) followed by Jamaica (23 species) then Hispaniola (17 species) and Puerto Rico (16 species). The number of species found on Cuba is probably the result of the island's proximity to Central and …

Prehistoric Cremations From Nogales, Arizona *, Karl J. Reinhard, Jeff H. Shipman

Karl Reinhard Publications

In October, 1969, the Highway Salvage Section of the Arizona State Museum conducted emergency salvage excavations in conjunction with the construction of the Tucson-Nogales Highway. Ten cremations were recovered from a backhoe trench which had been placed within the city limits of Nogales, Arizona. Analysis of the cremations indicated cultural contact between the Trincheras culture of Sonora, Mexico, and the Hohokam culture of the Santa Cruz River Valley in southern Arizona.

Food Of The Atlantic Croaker, Micropogonias Undulatus, From Mississippi Sound And The Gulf Of Mexico, Robin M. Overstreet, Richard W. Heard

Harold W. Manter Laboratory of Parasitology: Faculty Publications

The diet of the Atlantic croaker from Mississippi Sound has been examined for the first time. Over 83 taxa were encountered, or more than were reported from croaker in any other region. We also found 60 taxa, 36 of which overlapped with the above, in croaker from various offshore stations in the Gulf of Mexico. In Mississippi Sound the frequency of occurrcnce of items revealed primarily crustaceans followed by polychaetes, molluscs, fishes, and less common items, and, in the open Gulf, molluscs appeared slightly more often than in inshore croaker and than polychaetes in offshore fish. The diets were assessed …

Food Of The Red Drum, Sciaenops Ocellata, From Mississippi Sound, Robin M. Overstreet, Richard W. Heard

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Examined digestive tracts of the red drum in Mississippi Sound contained mostly decapod crustaceans. Crustaceans accounted for 34 of 59 encountered taxa, more than reported from any other region. Nevertheless, the general diet for 104 fish with food contents out of the 107 examined is similar to that reported for red drum in several other studies from other areas. In addition to crustaceans, fishes followed by polychaetes occurred as the most important items (in 99, 43, and 15% of the drum with food, respectively). Blue crabs occurred in even more drum than the frequently encountered penaeid shrimps. Other commercial species …

Nitrogen Fixation (Acetylene Reduction) Associated With Roots Of Winter Wheat And Sorghum In Nebraska, Wayne L. Pedersen, K. Chakrabarty, R. V. Klucas, Anne K. Vidaver

Department of Plant Pathology: Faculty Publications

Root segments and root-soil cores (6.5-cm diameter) from fields and nurseries of winter wheat and sorghum were tested for N₂ fixation by using the acetylene reduction assay. Wheat samples (~1,200) from 109 sites generally had low or no activity (0 to 3.1 nmol of C₂H₄ produced per h per g [dry weight] of root segments), even after 24 h of incubation. However, a commercial field of Scout 66, located in western Nebraska, exhibited appreciable activity (290 nmol of C₂H₄ produced per h per g [dry weight] of root segments). Of 400 sorghum lines …

Suppressed Rejection Of Trichinella Spiralis In Immunized Rats Concurrently Infected With Eimeria Nieschulzi, Donald W. Duszynski, Deborah Russell, Shirley A. Roy, Gilbert A. Castro

Harold W. Manter Laboratory of Parasitology: Faculty Publications

This study deals with the effect of Eimeria nieschulzi infection on the host immune response to Trichinella spiralis. Six male Sprague-Dawley rats were inoculated with 10⁴ and six with 10⁶; sporulated E. nieschulzi oocysts. On days 2, 8, and 16 post-inoculation (PI), two rats from each infected group, and their paired uninfected controls, were killed and mucosal scrapings from their small intestines were assayed for peroxidase activity. Peroxidase levels were higher than corresponding control values on days 2 and 16 PI and significantly lower than the controls on day 8 PI. These data led us to …

Review Of Helminths Of Fish-Eating Birds Of The Palaearctic Region. I. Nematoda, Glenn L. Hoffman

United States Fish and Wildlife Service: Publications

The title is accurate but the subject is a little misleading. One would expect that the fish-eating birds will acquire nematodes from the fish they eat. On the contrary, with one exception, Eustrongylides tubifex, as far as is known none of these nematodes use fish as normal intermediate hosts. A few species use fish as paratenic hosts. The book consists of an Introduction (2 pages), General Account of Nematodes (4 pages), the Systematic Part (233 pages), List of Fish-Eating Birds and Their Nematodes (22 pages), References (29 pages) and Index (13 pages). There are keys to families, genera, and …

A Comparison Between Crossbred And Straightbred Production Of Targhee Range Ewes, James M. Pajl

Electronic Theses and Dissertations

This investigation was initiated. to determine the effect of crossbred vs. straightbred production under the environmental conditions found at the Antelope Range Research Station, Buffalo, South Dakota.

Western Corn Rootworm Sex Pheromone; Field Trapping Studies, Michael J. Lockwood

Electronic Theses and Dissertations

The purpose of this study was to explore the potential of monitoring field populations of the NCR and WCR beetles with pheromone baited sticky traps. Predictions of CRW infestations in corn fields on a single field basis have yet to be achieved. The objectives of this study were: 1. To determine the effects of trapping procedures on CRW beetle trap catch variability: trap design, trap height, pheromone age, pheromone concentration and beetle density. 2. To determine the impact of environmental factors on daily trap catch variability: temperature (OC), wind speed (m/sec), and relative humidity (%) taken at hourly intervals. 3. …