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Pre-Spawning Migration Of Channel Catfish Into Three Warmwater Tributaries-Effects Of A Cold Tailwater, Gary L. Siegwarth, James E. Johnson Jan 1994

Pre-Spawning Migration Of Channel Catfish Into Three Warmwater Tributaries-Effects Of A Cold Tailwater, Gary L. Siegwarth, James E. Johnson

Journal of the Arkansas Academy of Science

Spring migrations of channel catfish (Ictalurus punctatus) into the Kings, Mulberry and Buffalo rivers, Arkansas, were compared to determine adult catfish migration into a warm water river that flows into a cold tailwater. The Buffalo River flows into a cold tailwater reach of the White River and supports a sparse channel catfish population compared to similar rivers in the region that do not flow into cold tailwaters. This is an important factor because many recent studies have demonstrated that channel catfish make pre-spawning migrations into tributary streams and may contribute significantly to tributary populations. To assess channel catfish migration, hoop …

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Female Reproductive Traits In Selected Arkansas Snakes, Stanley E. Trauth, Robert L. Cox, Walter E. Meshaka Jr., Brian P. Butterfield, Anthony Holt Jan 1994

Female Reproductive Traits In Selected Arkansas Snakes, Stanley E. Trauth, Robert L. Cox, Walter E. Meshaka Jr., Brian P. Butterfield, Anthony Holt

Journal of the Arkansas Academy of Science

Female reproductive characteristics of 17 genera of Arkansas snakes (27 species and subspecies) were examined. Most of the snakes (n= 495) were collected over a 10-year span (1984-1993). Methods used to estimate clutch and/or litter size were as follows: 1) counts of previtellogenic ovarian follicles,2) counts of vitellogenic ovarian follicles,3) counts of oviductal eggs or embryos, 4) counts of corpora luteal scars, and 5) counts of neonates from egg clutches or litters. In several species, Method 1 tended to overestimate clutch size as determined by Method 2 by as much as 100% (e.g., in Diadophis punctatus, Elaphe obsoleta, and Lampropeltis …

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Recent Record Of The Plains Minnow, Hybognathus Placitus Girard, From Arkansas, Thomas M. Buchanan, Henry W. Robison Jan 1994

Recent Record Of The Plains Minnow, Hybognathus Placitus Girard, From Arkansas, Thomas M. Buchanan, Henry W. Robison

Journal of the Arkansas Academy of Science

No abstract provided.

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Table Of Contents, Academy Editors Jan 1994

Table Of Contents, Academy Editors

Journal of the Arkansas Academy of Science

No abstract provided.

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78th Annual Meeting, 1994. Secretary's Report And Financial Statement, Academy Editors Jan 1994

78th Annual Meeting, 1994. Secretary's Report And Financial Statement, Academy Editors

Journal of the Arkansas Academy of Science

No abstract provided.

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78th Annual Meeting, 1994. Program, Academy Editors Jan 1994

78th Annual Meeting, 1994. Program, Academy Editors

Journal of the Arkansas Academy of Science

No abstract provided.

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Proceedings Of The Arkansas Academy Of Science - Volume 48 1994, Academy Editors Jan 1994

Proceedings Of The Arkansas Academy Of Science - Volume 48 1994, Academy Editors

Journal of the Arkansas Academy of Science

No abstract provided.

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Spatial Distributions Of Three Species Of Desmognathus In A North Carolina Stream, James J. English, Alvan A. Karlin, Laurie D. Lacer Jan 1994

Spatial Distributions Of Three Species Of Desmognathus In A North Carolina Stream, James J. English, Alvan A. Karlin, Laurie D. Lacer

Journal of the Arkansas Academy of Science

Salamanders of the family Plethodontidae comprise the most common salamanders in eastern North America. It is not uncommon for more than 10 plethodontid species to occur syntopically in one creek. The purpose of this research was to determine whether the spatial distribution of one species affected the spatial distribution of other species. Geographic Information System technology and nearest-neighbor analyses were used to determine the spatial distributions of three species of the salamander genus Desmognathus. The analysis demonstrates that D. ochrophaeus and D. monticola change their spatial use from a random distribution during the day to a clumped distribution during evening …

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Classification System For The Natural Vegetation Of Arkansas, Thomas L. Foti, Martin Blaney, Xiaojun Li, Kimberly G. Smith Jan 1994

Classification System For The Natural Vegetation Of Arkansas, Thomas L. Foti, Martin Blaney, Xiaojun Li, Kimberly G. Smith

Journal of the Arkansas Academy of Science

We present a hierarchical classification system for existing natural vegetation of Arkansas based on the United Nations Educational, Scientific and Cultural Organization (UNESCO) system. It incorporates aspects of systems in use by the Nature Conservancy, Arkansas Natural Heritage Commission, Arkansas Game and Fish Commission, Society of American Foresters, and United States Forest Service, as well as data on potential vegetation from maps by E.E. Dale and A.W. Kuchler. A total of 18 physiognomic cover types are recognized for natural terrestrial cover, 6 for palustrine cover, and 4 each for lacustrine cover and riverine cover. Over 200 community types are recognized, …

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Reaction Of Titanocene Dichloride With Acetylenedicarboxylate, Tanya L. Hagler, Mark Draganjac, Paul M. Nave, J. Ed Bennett, Farooq Kahn, Robert Engelken, Gerard Williams, Chris Poole, Kwok Fai Yu Jan 1994

Reaction Of Titanocene Dichloride With Acetylenedicarboxylate, Tanya L. Hagler, Mark Draganjac, Paul M. Nave, J. Ed Bennett, Farooq Kahn, Robert Engelken, Gerard Williams, Chris Poole, Kwok Fai Yu

Journal of the Arkansas Academy of Science

The reaction of Cp2TiCl2 with either the mono- or dipotassium salt of acetylenedicarboxylic acid (ADC) gives high yields of an insoluble orange product. The insoluble compound shows potential semiconductor behavior, as evidenced by an apparent bandgap in the orange region of the visible spectrum. Under N2 ,the compound decomposes at 238° C, eventually losing approximately 46% total mass up to 1350° C. The exothermic decomposition in air, beginning at 235° C, results in the formation of titanium oxides.

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Laccase Production By Chaetomium Elatum, A Soft-Rot Fungus, Wilson H. Howe, Joyce M. Hardin Jan 1994

Laccase Production By Chaetomium Elatum, A Soft-Rot Fungus, Wilson H. Howe, Joyce M. Hardin

Journal of the Arkansas Academy of Science

Though enzymes responsible for rotting wood have been studied for some time, the enzymes and enzymatic systems responsible for breaking down lignin have only begun to be discovered. The lignin-degrading enzymes produced by soft-rot fungi, in particular, have not been sufficiently studied. The present study presents evidence that the enzyme called laccase, known to be associated with lignin biodegradation, is produced by the species Chaetomium elatum, a soft-rot fungus. Cerrena unicolor, a positive control, and Chaetomium elatum were grown in culture. These species were tested for the presence of laccase using syringaldazine as a chromogenic substrate. As expected, Cerrena unicolor …

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Genetic Variability In Developing Periodical Cicadas, Alvan A. Karlin, Eric C. Stout, Lance T. Adams, Lisa R. Duke, James J. English Jan 1994

Genetic Variability In Developing Periodical Cicadas, Alvan A. Karlin, Eric C. Stout, Lance T. Adams, Lisa R. Duke, James J. English

Journal of the Arkansas Academy of Science

There are few events in nature that are more predictable than the emergence of periodical cicadas. The insects emerge from the ground after 13 or 17 years (depending on brood and species) of development. Karlin et al., (1991) biochemically examined over 750 Magicicada tredecassini belonging to Brood XIX which emerged during the spring of 1985. In this study they found evidence for rapid deterioration of heterozygosity for two esterase loci,Gi-3-pdh and Gpi, and suggested that this deterioration may be related to differential mating classes. To test this hypothesis, we re-sampled from this same brood at the same location during fall …

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Comparative Gas-Exchange In Leaves Of Intact And Clipped, Natural And Planted Cherrybark Oak (Quercus Pagoda Raf.) Seedlings, Brian Roy Lockhart, John D. Hodges Jan 1994

Comparative Gas-Exchange In Leaves Of Intact And Clipped, Natural And Planted Cherrybark Oak (Quercus Pagoda Raf.) Seedlings, Brian Roy Lockhart, John D. Hodges

Journal of the Arkansas Academy of Science

Gas-exchange measurements, including CO2 -exchange rate (net photosynthesis), stomatal conductance, and transpiration, were conducted on intact and clipped cherrybark oak (Quercus pagoda Raf.) seedlings growing in the field and in a nursery bed. Seedlings in the field, released from midstory and understory woody competition, showed significant increases in gas-exchange compared to non-released seedlings due to increases in light levels reaching seedlings. Concurrently, little difference occurred in the CO2 -exchange rate between intact and clipped seedlings in the released treatment although clipped seedlings maintained a consistently greater rate of stomatal conductance. In order to reduce the high variability of light levels …

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Liver Lipids Profiles In Nude Mice Implanted Subcutaneously With Cells Of Human Prostate Adenocarcinoma Grade Iv, Lawrence M. Mwasi Jan 1994

Liver Lipids Profiles In Nude Mice Implanted Subcutaneously With Cells Of Human Prostate Adenocarcinoma Grade Iv, Lawrence M. Mwasi

Journal of the Arkansas Academy of Science

Liver lipid changes in male BALB-c nude mice due to subcutaneously implanted human prostate metastatic grade IV adenocarcinoma was studied. The prostate cancer cells were cultured in F12 plus 7.5% horse serum and 25% fetal calf serum medium. When they reached confluence, some of these cells were fixed with glutaraldehyde and thoroughly washed with buffer then 4 x107 cells were implanted into four mice. Four more mice were implanted with 4 x 106 viable, unfixed cells. Four uninjected mice served as controls. All the mice were sacrificed 18 days later. The total liver lipids (TLL) from each liver were extracted …

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Burying Beetle (Coleoptera: Silphidae, Nicrophorus) Surveys On Poteau Ranger District, Ouachita National Forest, Joseph C. Neal, M. Earl Stewart, Warren G. Montague Jan 1994

Burying Beetle (Coleoptera: Silphidae, Nicrophorus) Surveys On Poteau Ranger District, Ouachita National Forest, Joseph C. Neal, M. Earl Stewart, Warren G. Montague

Journal of the Arkansas Academy of Science

Surveys for American burying beetles {Nicrophorus americanus Oliver) were conducted in west-central Arkansas on Poteau Ranger District of the Ouachita National Forest in1992 and 1993. A total of 2450 Nicrophorus specimens were captured in1098 trap nights. The most frequently captured specimens were N. orbicollis, N. tomentosus, and N. pustulatus. One specimen of N. americanus was also captures. Other species of beetles were also trapped and identified in this survey. Habitats sampled were primarily well-drained uplands with proposed or recent harvests of shortleaf pine (Pinus echinata). It appears that these habitats may not harbor extensive populations of N. americanus onPoteau RD.

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Long-Term Study Of Benthos In Dardanelle Reservoir, John D. Rickett, Robert L. Watson Jan 1994

Long-Term Study Of Benthos In Dardanelle Reservoir, John D. Rickett, Robert L. Watson

Journal of the Arkansas Academy of Science

Winter, spring, summer, and autumn samples were collected with a 15.24x15.24-cm Ekman grab from five stations on Dardanelle Reservoir, Pope County, Arkansas during the 24-year period from 1970-1993. Twenty-three taxa representing the eight phyla, Cnidaria, Nematoda, Nematomorpha, Entoprocta, Ectoprocta, Mollusca, Annelida, and Arthropoda, were collected. Numerically, oligochaetes comprised 36%, whereas chironomid larvae, Chaoborus larvae, and Hexagenia naiads mad up 29.7, 17, and 12%, respectively, of the samples. Asiatic clams, fingernail clams, amphipods, and Urnatella were collected frequently during the last 10 years but were not abundant. Other taxa were taken infrequently but consistently during the study period. Densities of all …

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Thermal Decomposition Studies Of Selected Transition Metal Polysulfide Complexes. Ii. Effect Of Atmosphere On Decomposition, Benjamin Rougeau, Mark Draganjac Jan 1994

Thermal Decomposition Studies Of Selected Transition Metal Polysulfide Complexes. Ii. Effect Of Atmosphere On Decomposition, Benjamin Rougeau, Mark Draganjac

Journal of the Arkansas Academy of Science

Initial studies involved the thermal decomposition profile of five polysulfide complexes in air up to 550 °C. Since our first report to the Academy in 1990, we have obtained the capability to run samples up to 1500°C under various gases. Thermal Gravimetric Analysis (TGA) and Differential Thermal Analysis (DTA)of a series of transition metal polysulfide complexes are presented. Compounds analyzed included Cp2TiS5 ,MoS9 2",MoOS8 2", Zn(S x ) 2", Cd(S x ) 2-, Fe2S122 - and NiS82.

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Vegetation Of Maple-Leaved Oak Sites On Sugarloaf And Magazine Mountains, Arkansas, David W. Rouw, George P. Johnson Jan 1994

Vegetation Of Maple-Leaved Oak Sites On Sugarloaf And Magazine Mountains, Arkansas, David W. Rouw, George P. Johnson

Journal of the Arkansas Academy of Science

We conducted an analysis of the vegetation of the maple-leaved oak sites on Sugarloaf and Magazine Mountains, Arkansas, during September and October of 1993. The woody vegetation was sampled using the point-quarter method; on Sugarloaf Mountain five transects were sampled (950 m) and on Magazine Mountain four transects were sampled (710 m). Soil samples from each site were collected and analyzed for 15 factors. In total 27 species were recorded and measured for both sites, 18 for Sugarloaf and 19 for Magazine. The Sugarloaf site can be described as a Quercus-Juniperus community and the Magazine site can be described as …

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Pleistocene And Halocene Remains From The Red River, Southwest Arkansas, Terry A. Sanders Jan 1994

Pleistocene And Halocene Remains From The Red River, Southwest Arkansas, Terry A. Sanders

Journal of the Arkansas Academy of Science

Vertebrate remains have been found on gravel bars of the Red River in southwest Arkansas, northeast Louisiana, and east Texas. The majority of these specimens were recovered by amateur archaeologists and Dr. Frank Schambach of the Arkansas Archaeology Survey. Extinct species of bison (Bison sp.), mastodon (Mammut americanum), pampathere (Holmesina septentrionalis), llama (Palaeolama mirifica), tortoises (Geochelone sp.), and (Terrapene sp.) indicate a Pleistocene component in the region's alluvium. The giant tortoise, pampathere, and llama represent first known occurrences of these species for the state of Arkansas. Search times between finds were recorded for seven localities. The richest gravel bar averaged …

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Aquatic Macrophytes Of Two Small Northwest Arkansas Reservoirs, John J. Sullivan, Arthur V. Brown Jan 1994

Aquatic Macrophytes Of Two Small Northwest Arkansas Reservoirs, John J. Sullivan, Arthur V. Brown

Journal of the Arkansas Academy of Science

Lake Fayetteville and Lake Wedington are small reservoirs of about the same size and age that are located in northwestern Arkansas. We collected macrophytes from eleven transects around each reservoir in the autumn of 1993. Justicia (waterwillow), Typha (cat-tail), Scirpus (bulrush), Potamogeton (pondweed), and Zannichellia (horned pondweed) occur in both reservoirs. Justicia occurs most commonly in both reservoirs. The macrophytes of Lake Wedington are organized in a characteristic zonation pattern with bands from shore toward open water of emergent, floating-leaved, then submersed macrophytes. Macrophyte zonation was not as evident in Lake Fayetteville because of the low occurrence of floating leaved …

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Reproductive Cycles In Two Arkansas Skinks In The Genus Eumeces (Sauria: Scincidae), Stanley E. Trauth Jan 1994

Reproductive Cycles In Two Arkansas Skinks In The Genus Eumeces (Sauria: Scincidae), Stanley E. Trauth

Journal of the Arkansas Academy of Science

Reproductive cycles of the southern coal skink (Eumeces anthracinus pluvialis) and the five-lined skink (E. fasciatus) were studied by examining museum specimens collected in Arkansas. Histological preparations of testes from each species revealed eight spermatogenic stages. Male coal skinks produced sperm by late February, at least one month before male five-lined skinks. Height of the testicular cycle (maximum sperm production-stage 6 = spermiogenesis) in E. a. pluvialis occurred in March and early April, whereas in E. fasciatus, spermiogenesis reached a peak in May. Testicular recrudescence began in late May in E. a. pluvialis and mid-July in E. fasciatus. The reproductive …

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Use Of Visual And Tactile Behaviors By Rats (Rattus Norvegicus) In An Object Discrimination Swimming Task, Todd Wiebers Jan 1994

Use Of Visual And Tactile Behaviors By Rats (Rattus Norvegicus) In An Object Discrimination Swimming Task, Todd Wiebers

Journal of the Arkansas Academy of Science

When challenged with a cognitive task, rats demonstrate a behavioral flexibility in use and preference of sensory modalities. The present study describes visual and tactile behaviors used by rats in a two choice object discrimination swimming task. The task was designed to preclude use of other sensory modalities and could not be solved via spatial strategies. Fourteen rats learned to criterion a series of 10 discrimination problems. Rats exhibited three stereotypic visual and two stereotypic tactile behaviors over the course of the study. Data analyses indicated that rats demonstrated these behaviors more frequently as they became more familiar with the …

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Sex Ratio And Success, An Assessment Of Lindera Melissifolia In Arkansas, Robert D. Wright Jan 1994

Sex Ratio And Success, An Assessment Of Lindera Melissifolia In Arkansas, Robert D. Wright

Journal of the Arkansas Academy of Science

Lindera melissifolia pondberry, is a federally endangered dioecious shrub found in Arkansas and four other southeastern states. Although by far the greatest area exists in Arkansas, it is broken into numerous small single-sex clones concentrated in two locations. Several stands have been lost during the 1980's according to records of the Arkansas Natural Heritage Commission. Even casual observation reveals that there are more males than females. This suggests dependence on vegetative reproduction, with possible bias against females. This paper reports on work investigating this suggestion. It was found that a 7:1 bias in area covered favors males. Poor survival of …

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Renewal And Recovery: Shortleaf Pine /Bluestem Grass Ecosystem And Red-Cockaded Woodpeckers, George A. Bukenhofer, Joseph C. Neal, Warren G. Montague Jan 1994

Renewal And Recovery: Shortleaf Pine /Bluestem Grass Ecosystem And Red-Cockaded Woodpeckers, George A. Bukenhofer, Joseph C. Neal, Warren G. Montague

Journal of the Arkansas Academy of Science

No abstract provided.

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Distributional Records Of The Badger (Taxidea Taxus) In Arkansas, Michael E. Cartwright, Gary A. Heidt Jan 1994

Distributional Records Of The Badger (Taxidea Taxus) In Arkansas, Michael E. Cartwright, Gary A. Heidt

Journal of the Arkansas Academy of Science

No abstract provided.

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Status Of The Endangered Gray Bat (Myotis Grisescens) Hibernating Populations In Arkansas, Michael J. Harvey Jan 1994

Status Of The Endangered Gray Bat (Myotis Grisescens) Hibernating Populations In Arkansas, Michael J. Harvey

Journal of the Arkansas Academy of Science

No abstract provided.

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Isolation Of Borrelia Burgdorferi From Infected Laboratory Mice, Lawrence W. Hinck, Kim Kelly Simpson, Sherlita N. Reeves Jan 1994

Isolation Of Borrelia Burgdorferi From Infected Laboratory Mice, Lawrence W. Hinck, Kim Kelly Simpson, Sherlita N. Reeves

Journal of the Arkansas Academy of Science

No abstract provided.

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Species Of Birds Newly Recorded In Arkansas Since 1985, Douglas A. James, Max Parker, Charles Mills, Joseph C. Neal Jan 1994

Species Of Birds Newly Recorded In Arkansas Since 1985, Douglas A. James, Max Parker, Charles Mills, Joseph C. Neal

Journal of the Arkansas Academy of Science

No abstract provided.

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First Record Of The Channel Shiner, Notropis Wickliffi Trautman, In Arkansas And Comments On The Current River Populations Of Notropis Volucellus (Cope), Henry W. Robison, Thomas M. Buchanan Jan 1994

First Record Of The Channel Shiner, Notropis Wickliffi Trautman, In Arkansas And Comments On The Current River Populations Of Notropis Volucellus (Cope), Henry W. Robison, Thomas M. Buchanan

Journal of the Arkansas Academy of Science

No abstract provided.

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Distance Of Interference Of Red Rice (Orya Sativa) In Rice (O. Sativa), Sam L. Kwon, Roy J. Smith Jr., Ronald E. Talbert Jan 1994

Distance Of Interference Of Red Rice (Orya Sativa) In Rice (O. Sativa), Sam L. Kwon, Roy J. Smith Jr., Ronald E. Talbert

Journal of the Arkansas Academy of Science

Three rice cultivars were grown to determine the distance at which red rice affects growth and grain yield. Red rice reduced grain yield of Lemont when rice plants grew within 71 and 53 cm of red rice in 1986 and 1988, respectively. Grain yield of Newbonnet was reduced when grown within 53 cm of red rice in both years. Grain yield of Tebonnet was reduced when grown within 53 and 36 cm of red rice in 1986 and 1988, respectively. Grain yield reduction in influenced areas averaged 35, 26 and 21% for Lemont, Newbonnet, and Tebonnet, respectively. As the distance …

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