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Articles 3991 - 4020 of 5623
Full-Text Articles in Entire DC Network
New Vertebrate Records And Natural History Notes From Arkansas, M. B. Connior, R. Tumlison, H. W. Robison
New Vertebrate Records And Natural History Notes From Arkansas, M. B. Connior, R. Tumlison, H. W. Robison
Journal of the Arkansas Academy of Science
No abstract provided.
Letter From The Dean, Michael Vayda
Letter From The Dean, Michael Vayda
Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences
No abstract provided.
University Of Arkansas Graduate Catalog, 2011-2012, University Of Arkansas, Fayetteville
University Of Arkansas Graduate Catalog, 2011-2012, University Of Arkansas, Fayetteville
Graduate School Catalog of Studies
No abstract provided.
Characterization Of Temporal And Spatial Variation In Subwatersheds Of The Strawberry River, Ar, Prior To Implementation Of Agricultural Best Management Practices, T. R. Brueggen-Boman, J. L. Bouldin
Characterization Of Temporal And Spatial Variation In Subwatersheds Of The Strawberry River, Ar, Prior To Implementation Of Agricultural Best Management Practices, T. R. Brueggen-Boman, J. L. Bouldin
Journal of the Arkansas Academy of Science
Benthic macroinvertebrate (BMI) assessments indicate alterations in physical and/or chemical factors making them valuable tools when attempting to assess agricultural best management practices (BMPs). The purpose of this study was to obtain pre-BMP land cover and macroinvertebrate community data in order to characterize temporal and spatial variation in three catchments: Little Strawberry (LS), Greasy Creek (GC), and Sandy Creek (SC) of the Strawberry River Watershed, located in north central Arkansas, in order to establish baseline conditions. BMIs were collected for the three subwatersheds in 1995, 1999, 2002, 2003 and 2009. Taxa richness, Hilsenhoff Biotic Index (HBI) and Ephemeroptera, Plecoptera and …
Population Structuring And Transmission Dynamics Of A Laboratory Colony Of Gromphadorholaelaps Schaeferi: A Symbiotic Mite Of The Madagascar Hissing Cockroach Gromphadorhina Portentosa, D. J. Richardson
Journal of the Arkansas Academy of Science
Gromphadorholaelaps schaeferi is a symbiotic mite associated with the Madagascar hissing cockroach Gromphdorhina portentosa. The population structuring of G. schaeferi is described based on examination of 19,421 mites collected from 1,915 individuals of G. portentosa taken from a large laboratory colony. The mites exhibited an overall prevalence of 50.7% and mean intensity (+SE) of 20.0 (+0.6) with an infestation intensity range of 1-116, and relative abundance (+SE) of 10.1 (+0.4). Both prevalence and mean intensity of infestation exhibited a dramatic increase with increasing cockroach size/age. By the time cockroaches reach 40 mm the prevalence is nearly 100%. Mean intensity increases …
Morphology Of Rathke's Glands In The Snapping Turtle, Chelydra Serpentina, With Comments On The Presence Of Multilaminar Lamellar Bodies In Turtles, S. E. Trauth
Journal of the Arkansas Academy of Science
I examined the histology and ultrastructure of Rathke’s glands in hatchling, juvenile, and adult snapping turtles (Chelydra serpentina). This species possesses four pairs of Rathke’s glands (i.e., one axillary and three inframarginals) that are embedded beneath marginal bones and are named primarily according to the anatomical location of their orifices. These integumentary glands are similar anatomically and ultrastructurally to one another. Each gland is comprised of a single, highly vascularized, secretory lobule, which is surrounded by a thick tunic of asymmetrically arranged, striated muscle. Two types of large secretory vacuoles characterize most of the holocrine cells produced by a relatively …
Nocturnal Communal Winter Bird Roosts In Northwestern Arkansas, D. A. James
Nocturnal Communal Winter Bird Roosts In Northwestern Arkansas, D. A. James
Journal of the Arkansas Academy of Science
No abstract provided.
New Host And Geographic Distribution Record For The Leech, Myzobdella Reducta (Annelida: Hirudinida: Rhynchobdellida: Piscicolidae), From Arkansas, C. T. Mcallister, W. E. Moser, D. J. Richardson, H. W. Robison
New Host And Geographic Distribution Record For The Leech, Myzobdella Reducta (Annelida: Hirudinida: Rhynchobdellida: Piscicolidae), From Arkansas, C. T. Mcallister, W. E. Moser, D. J. Richardson, H. W. Robison
Journal of the Arkansas Academy of Science
No abstract provided.
New Geographic Distribution Records For Horsehair Worms (Nematomorpha: Gordiida) In Arkansas, Including New State Records For Chordodes Morgani And Paragordius Varius, H. W. Robison, C. T. Mcallister, B. Hanelt
New Geographic Distribution Records For Horsehair Worms (Nematomorpha: Gordiida) In Arkansas, Including New State Records For Chordodes Morgani And Paragordius Varius, H. W. Robison, C. T. Mcallister, B. Hanelt
Journal of the Arkansas Academy of Science
No abstract provided.
Demographics Of Mole Salamanders (Ambystoma Talpoideum) In A Northeastern Arkansas Pond, J. W. Stanley, J. R. Engelbert, M. K. Patrick, J. A. Sawyer, S. E. Trauth
Demographics Of Mole Salamanders (Ambystoma Talpoideum) In A Northeastern Arkansas Pond, J. W. Stanley, J. R. Engelbert, M. K. Patrick, J. A. Sawyer, S. E. Trauth
Journal of the Arkansas Academy of Science
No abstract provided.
Discovery: The Student Journal Of Dale Bumpers College Of Agricultural, Food And Life Sciences - Volume 13 2012, Several Authors
Discovery: The Student Journal Of Dale Bumpers College Of Agricultural, Food And Life Sciences - Volume 13 2012, Several Authors
Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences
No abstract provided.
Contents, Discovery Editors
Contents, Discovery Editors
Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences
No abstract provided.
The Effect Of Natural Antioxidants On Conjugated Linoleic Acid Yield During The Photoisomerization Of Soy Oil Linoleic Acid, Camille Schaffner, Andy Proctor
The Effect Of Natural Antioxidants On Conjugated Linoleic Acid Yield During The Photoisomerization Of Soy Oil Linoleic Acid, Camille Schaffner, Andy Proctor
Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences
Dietary conjugated linoleic acid (CLA) is known to be effective in avoiding many obesity related diseases. Conjugated linoleic acid is a product of ruminant fermentation and 3.4 g/day are needed to obtain the clinical benefits. However, it is difficult to obtain sufficient CLA to realize these benefits from a healthy diet containing dairy and beef products, without increasing levels of dietary cholesterol and saturated fat. A 20% CLA soy oil with low saturated fat and no cholesterol has been produced by photoisomerization of linoleic acid in the triacylglyceride oil. Further increasing the CLA yields has been possible by addition of …
Instructions For Authors, Discovery Editors
Instructions For Authors, Discovery Editors
Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences
No abstract provided.
Impact Of Different Handling Styles (Good Vs. Adverse) On Growth Performance, Behavior, And Cortisol Concentrations In Beef Cattle, Joan Bauer, Beth Kegley, John Richeson, Doug Galloway, J. A. (Pete) Hornsby, Jana Reynolds
Impact Of Different Handling Styles (Good Vs. Adverse) On Growth Performance, Behavior, And Cortisol Concentrations In Beef Cattle, Joan Bauer, Beth Kegley, John Richeson, Doug Galloway, J. A. (Pete) Hornsby, Jana Reynolds
Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences
Our objective was to determine effects of aggressive handling on growth performance, behavior, and cortisol concentrations in beef calves. Crossbred calves (313 ± 4.7 kg; n = 54; 24 steers, 30 heifers) from a single herd were stratified by gender, body weight, and initial chute score, then allocated randomly to one of six pens. Each pen was randomly assigned to one of two handling treatments (good or adverse) applied on days 7, 35, 63, and 91. The objective of good treatment was to handle the calves quietly and gently to minimize stress. The objective of adverse treatment was to move …
Invertebrate Abundances And Diversity Of A Six Year Old Organic Apple Orchard In Northwest Arkansas, Cory Johnson, Brina Smith, Mary C. Savin
Invertebrate Abundances And Diversity Of A Six Year Old Organic Apple Orchard In Northwest Arkansas, Cory Johnson, Brina Smith, Mary C. Savin
Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences
Ground cover mulch applications in perennial systems can have multiple benefits, one of which may be to enhance the size and diversity of the ground surface faunal community. To determine if ground cover and organic fertilizer applications altered invertebrate communities, litters in an experimental 0.4-ha organic apple orchard in Fayetteville, Ark. were sampled during a four week period beginning in February 2012. The orchard was planted in 2006 in a replicated 4 × 3 factorial design with organic ground cover and fertilizer treatments applied annually each April. Invertebrates were extracted using Berlese funnels and hand sorting techniques. Ground covers (wood …
The Arkansas Meat Goat Enterprise Budget, Jessica House, H. I. Goodwin
The Arkansas Meat Goat Enterprise Budget, Jessica House, H. I. Goodwin
Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences
Goats have long been the most populous livestock animals on the planet. They have been a staple food for many low-income countries. The United States has a growing demand for goat meat. There is an increase in ethnic cultures that desire goat meat as well as a growing interest from the general population. Goat meat is a healthy alternative compared to traditional red meats. Goats also pair well with other livestock animals due to their wide range of palatable feeds. They are commonly used in cattle operations for weed control because of their ability to consume noxious weeds. There is …
Status, Dispersal, And Breeding Biology Of The Exotic Eurasian Collared-Dove (Streptopelia Decaocto) In Arkansas, J. M. Fielder, R. Kannan, D. A. James, J. Cunningham
Status, Dispersal, And Breeding Biology Of The Exotic Eurasian Collared-Dove (Streptopelia Decaocto) In Arkansas, J. M. Fielder, R. Kannan, D. A. James, J. Cunningham
Journal of the Arkansas Academy of Science
The exotic Eurasian Collared-Dove (Streptopelia decaocto) was first sighted in Arkansas at Harrison (Boone Co.) on 25 June 1989. Since this initial sighting the species has grown in numbers and is now present in 42 of 75 counties across the state. In the spring and summer of 2009 and 2010, 20 nests were observed in the urban areas of Fort Smith (Sebastian County). Fifteen of the 20 nests (75%) were located on human-made structures of which 13 (65%) were on an electrical substation and two (10%) were on utility poles. The remaining 5 nests (25%) were in trees. Mean nest …
Establishing Baseline Nutrient And Sediment Input In The Lower Cache River Watershed, Ar, A. M. Gilmer, C. A. Rosado-Berrios, J. L. Bouldin
Establishing Baseline Nutrient And Sediment Input In The Lower Cache River Watershed, Ar, A. M. Gilmer, C. A. Rosado-Berrios, J. L. Bouldin
Journal of the Arkansas Academy of Science
Contaminants in waterways continue to be a problem especially in watersheds dominated by land use changes such as agriculture. Clearing the land for agricultural use is needed to support the population; however, agricultural contaminants are cited as contributing the greatest input of suspended solids and nutrients to waterways. Quantifying various contaminants in surface water is useful in determining their origin, thus aiding in their mitigation. This study, focused on the Cache River Watershed, reports pH, dissolved oxygen (DO), conductivity, turbidity, total suspended solids (TSS), NO3 - , NO2 - , and PO4 3- in the lower sub watersheds. It was …
Retrospective Epidemiologic Analysis Of Influenza Pandemics In Arkansas, A, A. J. Gray, D. Nguyen, B. M. Rowley
Retrospective Epidemiologic Analysis Of Influenza Pandemics In Arkansas, A, A. J. Gray, D. Nguyen, B. M. Rowley
Journal of the Arkansas Academy of Science
This study compares influenza mortality in Arkansas during the pandemics of: 1918 (aka Spanish flu), 1957, 1968, and 2009 (H1N1, aka Swine flu). Death certificate and U.S. census data were gathered and analyzed for statistical differences in mortalities based on sex, age, and geographic regions of Arkansas for each pandemic. The geographic regions were defined by the five Public Health Units classified by the Arkansas Department of Health. Regional mortalities were also analyzed across all pandemics to investigate how the different pandemics affected each individual region. Chi-square analyses for each pandemic showed only the 1918 pandemic had statistical differences between …
Comparing Methods For Interpolation To Improve Raster Digital Elevation Models, J. C. Guarneri, R. C. Weih Jr.
Comparing Methods For Interpolation To Improve Raster Digital Elevation Models, J. C. Guarneri, R. C. Weih Jr.
Journal of the Arkansas Academy of Science
Digital elevation models (DEMs) are available as raster files at 100m, 30m, and 10m resolutions for the contiguous United States and are used in a variety of geographic analyses. Some projects may require a finer resolution. GIS software offers many options for interpolating data to higher resolutions. We compared ten interpolation methods using 10m sample data from the Ouachita Mountains in central Arkansas. We interpolated the 10m DEM to 5m, 2.5m, and 1m resolutions and compared the absolute mean difference (AMD) for each using surveyed control points. Overall, there was little difference in the accuracy between interpolation methods at the …
Distribution, Life History Aspects, And Conservation Status Of The Spothanded Crayfish, Orconectes (Procericambarus) Punctimanus (Creaser) (Decapoda: Cambaridae), In Arkansas, C. T. Mcallister, H. W. Robison
Distribution, Life History Aspects, And Conservation Status Of The Spothanded Crayfish, Orconectes (Procericambarus) Punctimanus (Creaser) (Decapoda: Cambaridae), In Arkansas, C. T. Mcallister, H. W. Robison
Journal of the Arkansas Academy of Science
The spothanded crayfish, Orconectes (Procericambarus) punctimanus (Creaser), is an endemic crayfish of the Interior Highlands (Ozark Plateau) of Arkansas and Missouri. Fieldwork within the Arkansas portion of its overall distribution from 1999–2012 and a search of museum and literature records revealed a state distribution of 11 counties in northern Arkansas. Eighty-two collections of this crayfish were made from the White River system in 9 counties, including Baxter, Fulton, Independence, Izard, Lawrence, Marion, Randolph, Sharp, and Stone. Two additional counties, Clay and Searcy, are also added to the distribution of O. punctimanus from museum and literature records. This crayfish inhabits areas …
Effects Of Drosophila Ribosomal Protein S6 Kinase On Wing Growth, M. J. Stewart, J. L. Hunt
Effects Of Drosophila Ribosomal Protein S6 Kinase On Wing Growth, M. J. Stewart, J. L. Hunt
Journal of the Arkansas Academy of Science
In multicellular animals, organ size, cell size and total organism size are regulated by signaling through the insulin receptor and TOR signaling pathways. The ribosomal protein S6 kinase is a key component of these pathways. It has been shown that mice or Drosophila lacking this kinase have a reduced body size that is associated with a decrease in cell size. Ectopic expression of activated or dominant negative transgenic variants of the Drosophila homolog of ribosomal S6 kinase (dS6K) has been shown to cause phenotypes that are consistent with a role for dS6K in growth, but whether the phenotypes were due …
Using Infrared Imagery To Estimate White-Tailed Deer Populations On The Pine Bluff Arsenal, D. M. Techentin, E. S. Boyd, W. E. Sparks, R. E. Kissell Jr.
Using Infrared Imagery To Estimate White-Tailed Deer Populations On The Pine Bluff Arsenal, D. M. Techentin, E. S. Boyd, W. E. Sparks, R. E. Kissell Jr.
Journal of the Arkansas Academy of Science
Military installations present unique challenges to natural resource managers managing wildlife populations. For those species that are hunted or trapped, it is important to provide data to these installations for achieving sustainable harvests. Pine Bluff Arsenal (PBA), a military installation in southeastern Arkansas, manages for a host of wildlife species including white-tailed deer (Odocoileus virginianus). However, baseline data regarding population size for deer are lacking. We used infrared technology and distance sampling to estimate the size of the winter, post-harvest deer population on PBA. We identified 9 competing models. The best model provided an estimate of density of 0.245 deer/ha …
Summary Of Previous And New Records Of The Least Darter (Etheostoma Microperca) In Arkansas, B. K. Wagner, M. D. Kottmyer, M. E. Slay
Summary Of Previous And New Records Of The Least Darter (Etheostoma Microperca) In Arkansas, B. K. Wagner, M. D. Kottmyer, M. E. Slay
Journal of the Arkansas Academy of Science
The least darter, Etheostoma microperca, has a limited distribution in Arkansas and is designated as a species of greatest conservation need by the Arkansas Game and Fish Commission. The fish was first documented in the state in 1938 in Wildcat Creek west of Springdale with additional discoveries in 1960, 1973, 1981, and 1982. A 1997 study documented the persistence of the species in Healing Spring Run and a spring run tributary of Osage Creek, 2 of the historic streams. Field sampling in 2004-2005 and 2010-2011, provided more concentrated sampling efforts in the basin. This study sought to determine the present …
The Southern Arkansas University Biodiversity Collections, S. E. Krosnick, K. S. Dockter
The Southern Arkansas University Biodiversity Collections, S. E. Krosnick, K. S. Dockter
Journal of the Arkansas Academy of Science
No abstract provided.
History And Current Status Of Egyptian Goose (Alopochen Aegyptiacus) In Northwestern Arkansas, K. G. Smith, D. A. Fames
History And Current Status Of Egyptian Goose (Alopochen Aegyptiacus) In Northwestern Arkansas, K. G. Smith, D. A. Fames
Journal of the Arkansas Academy of Science
No abstract provided.
Title Of A Paper Prepared For The Arkansas Academy Of Science Journal [Instructions For Prospective Authors], Academy Editors
Title Of A Paper Prepared For The Arkansas Academy Of Science Journal [Instructions For Prospective Authors], Academy Editors
Journal of the Arkansas Academy of Science
No abstract provided.
Efficacy Of A Novel Molecular Tool In Silencing Arabidopsis Genes, Chase Purnell, Vibha Srivastava, M. Aydin Akbudak, Scott J. Nicholson
Efficacy Of A Novel Molecular Tool In Silencing Arabidopsis Genes, Chase Purnell, Vibha Srivastava, M. Aydin Akbudak, Scott J. Nicholson
Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences
RNA interference (RNAi), a pathway capable of silencing genes, has until recently only been achievable in the laboratory by the use of one method, expression of inverted repeat sequences of DNA. These constructs generate a double-stranded RNA, which in turn induce post-transcriptional silencing of other genes that bear sequence homology with the transgene. This approach of targeted gene silencing is extremely useful for studying the function of genes and engineering new traits in both plants and animals. It has recently been discovered that a transgene lacking the polyadenylation signal, called a truncated transgene, is also capable of inducing RNAi in …
Efficacies Of Fenbendazole And Albendazole In The Treatment Of Commercial Turkeys Artificially Infected With Ascaridia Dissimilis, Jessica Perkins, Tom Yazwinski, Chris Tucker
Efficacies Of Fenbendazole And Albendazole In The Treatment Of Commercial Turkeys Artificially Infected With Ascaridia Dissimilis, Jessica Perkins, Tom Yazwinski, Chris Tucker
Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences
The goal of this research was to determine the extent of resistance that turkey roundworms, Ascaridia dissimilis, have developed to anti-parasitic chemicals used in commercial poultry operations. Roundworm infections in turkeys have resulted in monetary losses for the poultry industry for years, generally due to poor feed conversion. The infection itself is subclinical and many turkeys have a light to moderate worm burden. Since parasitisms are light, this leads to the infections being noticed only during processing. Ascaridia dissimilis infections consist of adult worms and developing larvae with the latter comprising most of the worm burden and causing the most …