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Millipeds (Arthropoda: Diplopoda) Of The Ark - La - Tex. Vi. New Geographic Distributional Records From Select Counties Of Arkansas, C. T. Mcallister, H. W. Robison, L. C. Thompson, M. B. Connior Jan 2013

Millipeds (Arthropoda: Diplopoda) Of The Ark - La - Tex. Vi. New Geographic Distributional Records From Select Counties Of Arkansas, C. T. Mcallister, H. W. Robison, L. C. Thompson, M. B. Connior

Journal of the Arkansas Academy of Science

We continue to report, in the sixth of a series of papers, new geographic records for millipeds of the state, including noteworthy records for some taxa collected from Crowley’s Ridge in eastern Arkansas. This contribution documents 47 new co. records and includes records for 19 species within 9 families and 5 orders. More uncommon millipeds found included Okliulus carpenteri (Parajulidae), Eurymerodesmus newtonus (Eurymerodesmidae), Pseudopolydesmus minor (Polydesmidae) and undescribed species of Ethojulus (Parajulidae) and Nannaria (Xystodesmidae). Undoubtedly, additional records will be reported in the future as several gaps in the distribution of Arkansas millipeds remain.

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Valence-Length Correlations For Chemical Bonds From Atomic Orbital Exponents, F. D. Hardcastle Jan 2013

Valence-Length Correlations For Chemical Bonds From Atomic Orbital Exponents, F. D. Hardcastle

Journal of the Arkansas Academy of Science

Pauling’s empirical bond valence-length correlation has proven valuable because it offers a quick and convenient way of checking and evaluating molecular structures and determining oxidation states from measured bond lengths. In this study, a simplified quantum-mechanical approach was used to derive Pauling’s empirical bond valence-length relationship by considering overlap of hydrogen-like orbitals. An expression for the b “empirical” fitting parameter was derived in terms of atomic-orbital exponents. A new set of orbital exponents is presented using published atomic/covalent radii and a continuous function for the effective principal quantum. The b parameters calculated from the orbital exponents are consistent with bond …

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Synthesis, Characterization, And Properties Of Mononuclear And Dinuclear Ruthenium(Ii) Complexes Containing Phenanthroline And Chlorophenanthroline, Anwar A. Bhuiyan, X. Du Jan 2013

Synthesis, Characterization, And Properties Of Mononuclear And Dinuclear Ruthenium(Ii) Complexes Containing Phenanthroline And Chlorophenanthroline, Anwar A. Bhuiyan, X. Du

Journal of the Arkansas Academy of Science

The study of photophysical and photochemical properties of ruthenium complexes is of great interest for fundamental practical reasons. Ruthenium complexes have been investigated for use in artificial photosynthesis. This paper deals with the synthesis and spectroscopic investigation of custom-designed ruthenium complexes containing phenanthroline and chloro-phenanthroline ligands. These complexes maybe useful for biological electron-transfer studies. The heteroleptic ruthenium monomer complex Ru(phen)2(Cl-phen) (where phen = 1,10-phenanthroline and Cl-phen=5-chloro-1,10-phenanthroline) was prepared in a two-step procedure previously developed in our laboratory. This monomer complex was used to prepare the ruthenium homometallic dimer complex, (phen)2Ru(phen-phen)Ru(phen)2, by utilizing the Ni-catalyzed coupling reaction. Both complexes were purified …

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Scarab Beetles (Coleoptera: Scarabaeidae) In The Dung Of Native Arkansas Mammals, J. B. Kelley, J. L. Hunt, M. B. Connior Jan 2013

Scarab Beetles (Coleoptera: Scarabaeidae) In The Dung Of Native Arkansas Mammals, J. B. Kelley, J. L. Hunt, M. B. Connior

Journal of the Arkansas Academy of Science

Dung beetles are important ecological components of natural ecosystems. One primary activity is the fragmentation and recycling of animal dung. Little is known about the ecological impact of beetles associated with the dung of mammals native to Arkansas. We surveyed the dung of native mammals within Arkansas to determine the species and distributional patterns associated with dung. We searched and collected beetles in situ from the dung or nests of native mammalian species within Arkansas. We also set simple pitfall traps using dung of various native Arkansas mammals as bait. Most of the beetles collected were common dung beetles. However, …

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Water Quality Assessment Of Sager Creek Utilizing Physiochemical Parameters And A Family-Level Biotic Index, T. S. Wakefield Jan 2013

Water Quality Assessment Of Sager Creek Utilizing Physiochemical Parameters And A Family-Level Biotic Index, T. S. Wakefield

Journal of the Arkansas Academy of Science

An annual rapid bioassessment and physiochemical survey of Sager Creek in Northwest Arkansas was conducted. Sager Creek is a first to second order stream that flows through the city of Siloam Springs, AR. Invertebrate collections and water samples were collected at three different reaches, with the most downstream reach being below the effluent of the Siloam Springs Wastewater Treatment Plant. Benthic arthropods were collected, identified, and counted to produce a family-level biotic index and a family-level index of diversity. Statistical analysis revealed that these indices were significantly different for the effluent- influenced reach. However, this difference could not be correlated …

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Distribution Of Soil Density At A Bottomland Hardwood Forest Wetland Restoration, Chicot County, Arkansas, B. E. Sleeper, Robert L. Ficklin Jan 2013

Distribution Of Soil Density At A Bottomland Hardwood Forest Wetland Restoration, Chicot County, Arkansas, B. E. Sleeper, Robert L. Ficklin

Journal of the Arkansas Academy of Science

Bottomland hardwood forest (BLHF) soils provide a myriad of ecosystem services, yet much information is lacking with respect to how soil physical properties influence biogeochemical cycling along topographic gradients. Current patterns of vegetation at a 149ha wetland restoration site in Chicot County, Arkansas, suggest the presence of ecologically significant variation in soil properties within the Perry Clay soil series. A study was initiated in the Lower Mississippi Alluvial Valley (LMAV) to map soil bulk density and texture as well as to identify the interrelationships between soil physical properties, soil organic carbon, and total nitrogen. A random grid was used to …

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Distribution Of Yellow Grub (Clinostomum Marginatum) Metacercariae In Black Bass (Micropterus Spp.) From Arkansas Ozark And Ouachita Reservoir Lakes, James J. Daly Sr. Jan 2013

Distribution Of Yellow Grub (Clinostomum Marginatum) Metacercariae In Black Bass (Micropterus Spp.) From Arkansas Ozark And Ouachita Reservoir Lakes, James J. Daly Sr.

Journal of the Arkansas Academy of Science

No abstract provided.

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Reappearance Of The Eastern Collared Lizard (Crotaphytus Collaris) Along Shorelines Of Bull Shoals Lake In Northern Arkansas, J. L. Rheubert, S. E. Trauth Jan 2013

Reappearance Of The Eastern Collared Lizard (Crotaphytus Collaris) Along Shorelines Of Bull Shoals Lake In Northern Arkansas, J. L. Rheubert, S. E. Trauth

Journal of the Arkansas Academy of Science

No abstract provided.

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Ectoparasites Of Sciurid Rodents In Arkansas, Including New State Records For Neohaematopinus Spp. (Phthiraptera: Anoplura: Polyplacidae), C. T. Mcallister, M. B. Connior, L. A. Durden Jan 2013

Ectoparasites Of Sciurid Rodents In Arkansas, Including New State Records For Neohaematopinus Spp. (Phthiraptera: Anoplura: Polyplacidae), C. T. Mcallister, M. B. Connior, L. A. Durden

Journal of the Arkansas Academy of Science

No abstract provided.

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Acknowledgment Of The Major Sponsors Of The Academy: Arkansas Natural Heritage Commission; Ouachita National Forest, Academy Editors Jan 2013

Acknowledgment Of The Major Sponsors Of The Academy: Arkansas Natural Heritage Commission; Ouachita National Forest, Academy Editors

Journal of the Arkansas Academy of Science

No abstract provided.

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Trajectory Generation For Stair Ascent Walking Using Rayleigh Oscillator, T. Afzal, Andrew B. Wright, Kamran Iqbal Jan 2013

Trajectory Generation For Stair Ascent Walking Using Rayleigh Oscillator, T. Afzal, Andrew B. Wright, Kamran Iqbal

Journal of the Arkansas Academy of Science

This paper describes a trajectory generation technique for stair-ascent walking. The knee, hip and ankle joint trajectory during stair ascent are generated using mutually coupled, nonlinear oscillators. The parameters of the oscillators are tuned using the harmonic balance method, which converts the nonlinear differential equations to a set of algebraic equations. Fourier analysis of data generated by stair-ascent walking is performed to extract the amplitude and the phase of the dominant frequency components for each joint trajectory. The solution for the oscillator is assumed to be a sinusoidal wave and then by harmonic balance method the parameters of the oscillator …

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Status Of An Exotic Salamander, Desmognathus Monticola (Caudata: Plethodontidae), And Discovery Of An Introduced Population Of Cottus Immaculatus (Perciformes: Cottidae) In Arkansas, M. B. Connior, C. T. Mcallister, H. W. Robison, Charles R. Bursey Jan 2013

Status Of An Exotic Salamander, Desmognathus Monticola (Caudata: Plethodontidae), And Discovery Of An Introduced Population Of Cottus Immaculatus (Perciformes: Cottidae) In Arkansas, M. B. Connior, C. T. Mcallister, H. W. Robison, Charles R. Bursey

Journal of the Arkansas Academy of Science

No abstract provided.

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Observations Of The Behavior Of The Giant Prairie Robberfly, Microstylum Morosum Loew (Diptera: Asilidae) At Terre Noire Natural Area, Clark County, Arkansas, R. Tumlison, K. Benjamin Jan 2013

Observations Of The Behavior Of The Giant Prairie Robberfly, Microstylum Morosum Loew (Diptera: Asilidae) At Terre Noire Natural Area, Clark County, Arkansas, R. Tumlison, K. Benjamin

Journal of the Arkansas Academy of Science

No abstract provided.

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Effects Of Bridge Design On Placement And Shape Of Cliff Swallow (Petrochelidon Pyrrhonota) Nests In Southern Arkansas, R. Tumlison, K. Kendall Jan 2013

Effects Of Bridge Design On Placement And Shape Of Cliff Swallow (Petrochelidon Pyrrhonota) Nests In Southern Arkansas, R. Tumlison, K. Kendall

Journal of the Arkansas Academy of Science

No abstract provided.

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Short-Term Denitrification In The Metalimnion Of A Eutrophic Reservoir, Aki Kogo, Erin M. Grantz, Thad Scott Jan 2013

Short-Term Denitrification In The Metalimnion Of A Eutrophic Reservoir, Aki Kogo, Erin M. Grantz, Thad Scott

Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences

Denitrification in metalimnetic water was examined under different conditions to determine how addition of nitrate (NO3 -) and particulate carbon (PC), aeration, and concentrations of nitrate affect denitrification. In the first experiment, water samples from a metalimnion were treated with different combinations of NO3 - and PC. Changes in excess N2 -N concentration for 10 days were measured using membrane inlet mass spectrometry (MIMS). The second experiment used the same treatments as the first experiment after aeration of water. Besides excess N2 -N concentrations, O2 concentrations were measured for 16 days. The third experiment examined how different initial concentrations of …

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Influence Of Organic Groundcovers On Mycorrhizal Colonization And Symbiosis Of Organically Managed Fruit Crops, Raven Anai Bough, Curt R. Rom Jan 2013

Influence Of Organic Groundcovers On Mycorrhizal Colonization And Symbiosis Of Organically Managed Fruit Crops, Raven Anai Bough, Curt R. Rom

Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences

Ground covers have the potential to impact the crop rhizosphere biology, which includes organisms such as arbuscular mycorrhizal fungi (AMF), which in turn affect the crop host plant through symbiosis. There has been evidence that a ground cover that provides a suitable environment for colonization of AMF and subsequent symbiosis could be a tool in organic fruit production. The objective of this research was to compare colonization of AMF in strawberry plant (Frageria x ananassa cv. Radiance) and apple rootstocks (Malus x domestica, cv. M. 26) grown in a greenhouse affected by various ground cover treatments. Inoculation was achieved by …

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Herbicide-Resistant Soybeans In Arkansas: Lessons Learned And Future Direction, Amy May West, Raven Bough, Hayley Jernigan, Mike Norton, Katie Beth Thomas, Curt R. Rom, Michael E. Vayda Jan 2013

Herbicide-Resistant Soybeans In Arkansas: Lessons Learned And Future Direction, Amy May West, Raven Bough, Hayley Jernigan, Mike Norton, Katie Beth Thomas, Curt R. Rom, Michael E. Vayda

Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences

In Arkansas Delta soybean production, glyphosate resistant (GR) Palmer amaranth has significantly impacted weed management. The incidence of herbicide resistant (HR) weeds has far-reaching crop science, economic, and communications implications, which have been explored by the corresponding expertise of our research team members to form a comprehensive literature review. The review was used to develop policy recommendations to address current and future HR genetically modified (GM) crop use and the associated issues. The review of crop science research indicated an overall increase in herbicide application, as well as an increase in weed management programs focused around glyphosate rather than the …

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Awareness, Use, And Perceptions Of Biodiesel: A Comparison Of Consumers In Belgium And The United States, Maggie Jo Pruitt, Leslie D. Edgar, Donald M. Johnson Jan 2013

Awareness, Use, And Perceptions Of Biodiesel: A Comparison Of Consumers In Belgium And The United States, Maggie Jo Pruitt, Leslie D. Edgar, Donald M. Johnson

Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences

Belgian (N = 61) and American (N = 134) fuel consumers were interviewed in the summer of 2012 to determine their awareness, use, and perceptions of biodiesel. Consumers who were aware of biodiesel were asked their perceptions. A significantly P < 0.0001) higher percentage of Belgian consumers (78.7%) reported owning or driving a diesel vehicle compared to American consumers (9.0%). Belgian and American consumers moderately agreed biodiesel is a high-quality fuel. For both Belgian and American consumers, there was no significant association between owning a diesel vehicle and being aware of biodiesel or having purchased biodiesel. Although Belgian and American consumers agreed that using non-food crops for biodiesel is justified, Belgians were significantly less supportive than American consumers of using food crops for biodiesel. Both Belgian and American consumers disagreed with the statement “I would never use biodiesel”, and the two sets of consumers moderately disagreed that diesel engines would not run properly on biodiesel. Belgian and American consumers agreed that global warming is increasing; however, American consumers were more positive about the potential of biodiesel to reduce harmful exhaust emissions and global warming. Belgian consumers moderately agreed and American consumers agreed that biodiesel is better to use because it is made from renewable resources. Belgian and American consumers generally show similar perceptions of biodiesel, with the exception that American consumers were more positive toward the environmental and renewable aspects of biodiesel use. Recommendations for further research include gaining a better understanding of the potential positive influences that impact consumers’ perceptions of biodiesel.

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Evaluation Of Cover Crops In High Tunnel Vegetable Rotation, Tyler A. Patrick, Neal Mays, Jason Mcafee, Curt R. Rom Jan 2013

Evaluation Of Cover Crops In High Tunnel Vegetable Rotation, Tyler A. Patrick, Neal Mays, Jason Mcafee, Curt R. Rom

Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences

Organic vegetable production within high tunnels allows for an extended growing season, crop protection, and environmental control. The USDA National Organic Program (NOP) standards mandate evidence that the soil has been maintained and improved over the course of production. Previous studies have indicated the potential of cover crops for reducing competitive vegetation, and improving soil quality, thus resulting in greater plant growth, nutrient uptake, and yield. However, there has been limited work in the confines of high tunnels as part of a tunnel-system rotation. Ten nitrogen-fixing and ten non-legume cover crops were established under a high tunnel and evaluated for …

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Deriving Biomass Models For Small-Diameter Loblolly Pine On The Crossett Experimental Forest, K. M. Mcelligot, Don C. Bragg Jan 2013

Deriving Biomass Models For Small-Diameter Loblolly Pine On The Crossett Experimental Forest, K. M. Mcelligot, Don C. Bragg

Journal of the Arkansas Academy of Science

Foresters and landowners have a growing interest in carbon sequestration and cellulosic biofuels in southern pine forests, and hence need to be able to accurately predict them. To this end, we derived a set of aboveground biomass models using data from 62 small-diameter loblolly pines (Pinus taeda) sampled on the Crossett Experimental Forest in southeastern Arkansas. Of the 25 equations initially evaluated, we chose 17 that best fit our dataset and compared them using a suite of conventional test statistics, including pseudo-R2 , root mean squared error (RMSE), and bias. Because most of the 17 models varied little in pseudoR …

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Acute Effects Of Exercise On Cognitive Performances Of Older Adults, R. Pennington, S. Hanna Jan 2013

Acute Effects Of Exercise On Cognitive Performances Of Older Adults, R. Pennington, S. Hanna

Journal of the Arkansas Academy of Science

Accelerating rates of structural decline become evident during the third and fourth decades of human life, with disproportionate degeneration occurring in the frontal, parietal, and temporal brain lobes. As the structure of the brain declines, a broad array of cognitive processes involving memory, decision making, and selective attention are reduced as well (Raz 2000, Park et al. 2001). Cardiovascular exercise has been associated with improved cognitive functioning in aging humans, suggesting that increased vascular supply enhances availability of oxygen, nutrients, and other physical entities to nourish the brain. Previous experimentation on older adults revealed significant positive effects of exercise on …

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Relationship Between Land-Use And Water Quality In Spring-Fed Streams Of The Ozark National Forest, A. Smartt, S. Ganguly, M. A. Evans-White, B. E. Haggard Jan 2013

Relationship Between Land-Use And Water Quality In Spring-Fed Streams Of The Ozark National Forest, A. Smartt, S. Ganguly, M. A. Evans-White, B. E. Haggard

Journal of the Arkansas Academy of Science

Spring-fed streams are abundant in karst topographic regions such as the Ozarks, providing an important and valuable water resource. Many of these spring-fed streams presently receive agriculture runoff, but few studies have examined the impacts of this runoff on water quality. We examined water quality in Ozark spring-fed streams surrounded by either agricultural (N=3) or primarily forested land (N=3) in the riparian zone. We hypothesized that agricultural sites would have greater dissolved nutrient concentrations and conductivity than forested sites and that water quality would fluctuate with distance from the spring source. Conductivity (p

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Perch-Type Characteristics Of Overwintering Red-Tailed Hawks (Buteo Jamaicensis) And American Kestrels (Falco Sparverius), A. J. Worm, M. M. Bobowski, Thomas S. Risch Jan 2013

Perch-Type Characteristics Of Overwintering Red-Tailed Hawks (Buteo Jamaicensis) And American Kestrels (Falco Sparverius), A. J. Worm, M. M. Bobowski, Thomas S. Risch

Journal of the Arkansas Academy of Science

Red-tailed Hawks (Buteo jamaicensis) and American Kestrels (Falco sparverius) are primarily sitand-wait predators that rely on perches to forage most efficiently. Overwintering Red-tailed Hawks and American Kestrels use available perches (e.g., utility poles and wires, trees, fences, gates, etc.) to hunt for prey items in agricultural fields in northeast Arkansas. Observations were made from December 2011-March 2012 and November 2012-March 2013 in three representative cover-types (short rice stubble, soybean stubble, and fallow areas including roadsides) to determine which perch-types were used by Red-tailed Hawks and American Kestrels. Utility pole crossbeams at an average height of 6.3 m were the main …

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Genus Reuteria (Hemiptera: Miridae) With Five Species New For Arkansas, U.S.A., Stephen W. Chordas Iii, C. Renn Tumlison, K. Benjamin Jan 2013

Genus Reuteria (Hemiptera: Miridae) With Five Species New For Arkansas, U.S.A., Stephen W. Chordas Iii, C. Renn Tumlison, K. Benjamin

Journal of the Arkansas Academy of Science

No abstract provided.

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Distribution, Conservation And Current Status Of Three Endemic Heterosternuta (Coleoptera: Dytiscidae: Hydroporinae) In Arkansas, S. D. Longing, P. A. Bacon, George L. Harp Jan 2013

Distribution, Conservation And Current Status Of Three Endemic Heterosternuta (Coleoptera: Dytiscidae: Hydroporinae) In Arkansas, S. D. Longing, P. A. Bacon, George L. Harp

Journal of the Arkansas Academy of Science

No abstract provided.

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Initial Survey On Black-Spot Disease (Digenea: Strigeoidea: Diplostomidae) In Select Arkansas Fishes, C. T. Mcallister, R. Tumlison, H. W. Robison, S. E. Trauth Jan 2013

Initial Survey On Black-Spot Disease (Digenea: Strigeoidea: Diplostomidae) In Select Arkansas Fishes, C. T. Mcallister, R. Tumlison, H. W. Robison, S. E. Trauth

Journal of the Arkansas Academy of Science

No abstract provided.

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Additional Vertebrate Records And Natural History Notes From Arkansas, M. B. Connior, C. Renn Tumlison, H. W. Robison, J. S. Placyk Jr., C. T. Mcallister Jan 2013

Additional Vertebrate Records And Natural History Notes From Arkansas, M. B. Connior, C. Renn Tumlison, H. W. Robison, J. S. Placyk Jr., C. T. Mcallister

Journal of the Arkansas Academy of Science

Although vertebrates are a commonly studied group of animals, the distribution and natural history of many species within Arkansas is still not well understood or documented. However, recently several new distribution and natural history notes have been published in a continuing series regarding Arkansas’s vertebrates (e.g. Tumlison and Robison 2010; Connior et al. 2011, Connior et al. 2012). Thus, we continue to augment current literature with new records of distribution and provide notes on the natural history of selected vertebrates from Arkansas. All voucher specimens (physical or photographic) are deposited in the vertebrate collections at either Arkansas State University (ASUMZ), …

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New Host Records For The Fish Leech Cystobranchus Klemmi (Hirudinida: Piscicolidae) On Cyprinid Fishes From Arkansas And Oklahoma, Dennis J. Richardson, R. Tumlison, J. W. Allen Jr., W. E. Moser, C. T. Mcallister, S. E. Trauth, H. W. Robison Jan 2013

New Host Records For The Fish Leech Cystobranchus Klemmi (Hirudinida: Piscicolidae) On Cyprinid Fishes From Arkansas And Oklahoma, Dennis J. Richardson, R. Tumlison, J. W. Allen Jr., W. E. Moser, C. T. Mcallister, S. E. Trauth, H. W. Robison

Journal of the Arkansas Academy of Science

No abstract provided.

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New Records Of The Eastern Small-Footed Bat (Myotis Leibii) In Arkansas, D. Blake Sasse, Thomas S. Risch, David A. Saugey, Michael J. Harvey, J. D. Wilhide, R. K. Redman, J. J. Jackson, T. Klotz, P. R. Moore Jan 2013

New Records Of The Eastern Small-Footed Bat (Myotis Leibii) In Arkansas, D. Blake Sasse, Thomas S. Risch, David A. Saugey, Michael J. Harvey, J. D. Wilhide, R. K. Redman, J. J. Jackson, T. Klotz, P. R. Moore

Journal of the Arkansas Academy of Science

No abstract provided.

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Arkansas Lepidoptera Survey: A Preliminary Check List Of Arkansas Species, E. C. Lovely, J. K. Ettman Jan 2013

Arkansas Lepidoptera Survey: A Preliminary Check List Of Arkansas Species, E. C. Lovely, J. K. Ettman

Journal of the Arkansas Academy of Science

The mission of the Arkansas Lepidoptera Survey is to enhance the fundamental knowledge of butterflies, skippers, and moths in Arkansas. To achieve this mission, its objectives include developing a reference collection of Arkansas Lepidoptera and maintaining a current check list of present, historical and accidental species in Arkansas. The following list includes 1360 species representing 57 families. It was compiled from original field collecting, literature review, and analysis of museum specimens. The Arkansas Lepidoptera Survey established a reference collection of Arkansas butterflies, skippers and moths located in McEver Hall on the Arkansas Tech University campus. This collection currently contains 567 …

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