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University of Arkansas, Fayetteville

1998

Articles 1 - 18 of 18

Full-Text Articles in Life Sciences

Agricultural Water Management In The Missippi Delta Region Of Arkansas, H. Don Scott, James A. Ferguson, Linda Hanson, Todd Fugitt, Earl Smith Aug 1998

Agricultural Water Management In The Missippi Delta Region Of Arkansas, H. Don Scott, James A. Ferguson, Linda Hanson, Todd Fugitt, Earl Smith

Research Reports and Research Bulletins

Agriculture is the largest use of soil and water resources in eastern Arkansas. This bulletin summarized the recent historical use of soil and water by agriculture and the impact of irrigation on yields of rice, soybeans and cotton. The experiments conducted in the field to quantitatively schedule irrigations of crops are summarized. The results show the close relationship between the irrigation of crops and the extraction of water from the Alluvial Aquifer. The implications of this relationaship for the future are discussed.

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Arkansas Soil Fertility Studies 1997, Wayne E. Sabbe Apr 1998

Arkansas Soil Fertility Studies 1997, Wayne E. Sabbe

Arkansas Agricultural Experiment Station Research Series

No abstract provided.

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An Economic Assessment Of The Myanmar Rice Sector: Current Developments And Prospects, Kenneth B. Young, Gail L. Cramer, Eric J. Wailes Feb 1998

An Economic Assessment Of The Myanmar Rice Sector: Current Developments And Prospects, Kenneth B. Young, Gail L. Cramer, Eric J. Wailes

Research Reports and Research Bulletins

In this study, the Myanmar rice economy is described in the context of the current political situation and state of national economic development. The forces that are changing rice production and exports are identified; however, the rate of development involves a complex integration of government intervention and politics, as well as availability of resources. Probable scenarios for rice production and export are projected based on recent growth trends and expected infrastructure development. The Arkansas Global Rice Model is used to integrate the Myanmar rice sector with the global rice market in developing projections.

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Quantifying Community Separation And Increase In Number Of Avian Species With Corresponding Increase In Habitat Complexity, An African Example, Douglas A. James Jan 1998

Quantifying Community Separation And Increase In Number Of Avian Species With Corresponding Increase In Habitat Complexity, An African Example, Douglas A. James

Journal of the Arkansas Academy of Science

The relationship between increase in faunal diversity and corresponding increase in habitat complexity was quantified using shrubland bird communities in western Africa. Vegetational characteristics were measured in circular plots around bird positions. Bird species were then arranged from grassy open habitats to dense shrubland and found to be separated into three distinct communities when subjected to Duncan's multiple range procedure in conjunction with discriminant functions analysis. Random samples classified with respect to bird species showed there were few species in the more abundant open habitats and a disproportionate number of species were packed into the less common but complex shrubby …

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Floristic Inventory Of Three Bogs On Crowley's Ridge In Arkansas, Staria S. Vanderpool, Edward Leon Richards Jan 1998

Floristic Inventory Of Three Bogs On Crowley's Ridge In Arkansas, Staria S. Vanderpool, Edward Leon Richards

Journal of the Arkansas Academy of Science

A floristic inventory of vascular plant taxa of three wetlands known locally as bogs on Crowley's Ridge in Greene and Clay counties was conducted from August 1979 to July 1981. Total combined area of the three sites was 9.2 ha with a range from 2.3 ha to 4.3 ha. Overall 360 taxa representing 227 genera and 92 families were collected from the bogs and surrounding upland forest and identified. Plant taxa from bog sites ranged from 81 to 89 species with 35 species collected from all 3 bogs and 26 found in 2 of the 3 sites. Among the taxa …

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Marketing Practices Of Arkansas Beef Cattle Producers, Michael P. Popp, Lucas D. Parsch Jan 1998

Marketing Practices Of Arkansas Beef Cattle Producers, Michael P. Popp, Lucas D. Parsch

Research Reports and Research Bulletins

This report contains information from a 1996 survey on marketing practices of Arkansas beef cattle producers. While several studies have been completed on the profitability of retained ownership of beef cattle, few data are available on what marketing techniques and decision criteria cow-calf and stocker operations use to market their cattle. This report shows that there are some differences in opinions on marketing issues such as pooled cattle sales and retained ownership across cow-calf and stocker operations. Further, these operations use different sources of information to make marketing decisions. The results of this study can be particularly helpful in providing …

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Production Practices Of Arkansas Beef Cattle Producers, Michael P. Popp, Lucas D. Parsch Jan 1998

Production Practices Of Arkansas Beef Cattle Producers, Michael P. Popp, Lucas D. Parsch

Research Reports and Research Bulletins

This report contains information from a 1996 survey on production practices of Arkansas beef cattle producers. While several studies have been completed on the profitability of retained ownership of beef cattle, few empirical data are available on production practices of cow/calf and stocker operations in Arkansas. This report shows that there are some differences in production methods across operation types. Further, the report summarizes demographic characteristics of Arkansas cow/calf and stocker operations. The results of this study can be particularly helpful in providing the needed data for studying the potential economic impact of feeding weaned calves to heavier weights in …

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In Vitro Growth Characteristics Of Two Cryptococcus Neoformans Isolates, Kristy L. Jones, Juneann W. Murphy Jan 1998

In Vitro Growth Characteristics Of Two Cryptococcus Neoformans Isolates, Kristy L. Jones, Juneann W. Murphy

Journal of the Arkansas Academy of Science

Cryptococcus neoformans is an opportunistic pathogen which attacks individuals with weakened immune systems. Two C. neoformans isolates, 184A and NU-2, were examined to determine characteristics that contribute to their difference in virulence. Both isolates were grown under tissue culture conditions, and different characteristics were tested at timed intervals. Isolate 184A was found to grow at a faster rate than isolate NU-2, with doubling times of 4 and 12 hours respectively. The polysaccharide capsule of isolate NU-2 doubled in size in four hours, while that of isolate 184A stayed approximately the same. The NU-2 yeast cell diameter without the polysaccharide capsule …

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Caudal Courtship Glands In The Cave Salamander, Eurycea Lucifuga (Caudata: Plethodontidae), Butch E. Hamlett, Andy G. Strecker, Stanley E. Trauth Jan 1998

Caudal Courtship Glands In The Cave Salamander, Eurycea Lucifuga (Caudata: Plethodontidae), Butch E. Hamlett, Andy G. Strecker, Stanley E. Trauth

Journal of the Arkansas Academy of Science

No abstract provided.

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Notes On The Natural History Of Lasiurus Borealis In Arkansas, David A. Saugey, Robin L. Vaughn, Betty G. Crump, Gary A. Heidt Jan 1998

Notes On The Natural History Of Lasiurus Borealis In Arkansas, David A. Saugey, Robin L. Vaughn, Betty G. Crump, Gary A. Heidt

Journal of the Arkansas Academy of Science

Since June 1982 we have studied various aspects of red bat ecology in Arkansas with emphasis on field work in the Ouachita Mountains and examination of specimens submitted to the Arkansas Department of Health Rabies Laboratory (ADHRL).This study reports on continued field work in the Ouachita Mountains using radiotelemetry and updates information regarding red bats submitted to the ADHRL through December 1996. In addition, we revisited a cave previously reported to contain a large number of red bat skull and skeletal remains. We also report remains from another cave system in northcentral Arkansas. These investigations have yielded additional information on …

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Highland Pond Utilization By Bats In The Ozark National Forest, Arkansas, J. D. Wilhide, Michael J. Harvey, V. Rick Mcdaniel, Vernon E. Hoffman Jan 1998

Highland Pond Utilization By Bats In The Ozark National Forest, Arkansas, J. D. Wilhide, Michael J. Harvey, V. Rick Mcdaniel, Vernon E. Hoffman

Journal of the Arkansas Academy of Science

During May through August 1996, wildlife ponds (man-made and/or naturally occurring) and road ruts on the Sylamore Ranger District, Ozark National Forest, Arkansas, were mist netted to determine extent of utilization by bats. Thirty-nine ponds and road ruts were netted one or more times during 53 nights. These water sources were originally constructed to support wildlife species such as deer, turkey, etc.. This study demonstrates that taxonomically and numerically diverse bat populations use these water sources. Seven hundred and seventy bats of nine species, including two endangered species, were netted. Bats were identified, and sex, reproductive status, forearm length, and …

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In-Stream Monitoring Of Sediments And Water In The Lower Ouachita River For Site Impact To Aquatic Biota, Jerry L. Farris, J. T. Knight, C. D. Milam, F. Buzen, J. F. Nix Jan 1998

In-Stream Monitoring Of Sediments And Water In The Lower Ouachita River For Site Impact To Aquatic Biota, Jerry L. Farris, J. T. Knight, C. D. Milam, F. Buzen, J. F. Nix

Journal of the Arkansas Academy of Science

Reported reduced sportfish densities in the main channel of the Ouachita River prompted an investigation, beginning in 1990, into potential causes of ongoing impairment to aquatic biota. In-stream monitoring that incorporated toxicity testing of sediments and water was conducted to discern potential sources of contaminants that might be related to the suboptimal fishery populations. Organisms selected to evaluate chronic impairment included larval fish, clams, midges and water fleas. The fathead minnow {Pimephales promelas) and cladoceran (Ceriodaphnia dubid) were used to estimate patterns of toxicity associated with water from seven designated reaches and selected tributaries of the Ouachita River. Larval survival …

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Wood Frog (Rana Sylvatica) Use Of Wildlife Ponds In Northcentral Arkansas, Michael E. Cartwright, Stanley E. Trauth, J. D. Wilhide Jan 1998

Wood Frog (Rana Sylvatica) Use Of Wildlife Ponds In Northcentral Arkansas, Michael E. Cartwright, Stanley E. Trauth, J. D. Wilhide

Journal of the Arkansas Academy of Science

Forty-one wildlife ponds were monitored between 1988 and 1992 for breeding use by wood frogs (Rana sylvatica). Data were collected on egg deposition and pond characteristics. Breeding activity and characteristics were similar to that reported in other portions of the range of the wood frog. We also monitored 15 newly-constructed ponds to determine chronological breeding patterns. Data collected for each site indicated a significant increase (P< 0.05) in the number of egg masses deposited in ponds as they age from 1-3 years during our study period. Increased chronological use of newly-constructed ponds may be due to localized population increase resulting from greater availability of breeding habitat

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Nutritional Condition And Reproduction Of Deer At Fort Chaffee, Arkansas, Thomas A. Nelson, Donald A. Phillips Jan 1998

Nutritional Condition And Reproduction Of Deer At Fort Chaffee, Arkansas, Thomas A. Nelson, Donald A. Phillips

Journal of the Arkansas Academy of Science

No abstract provided.

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Telemetric Observations Of Foraging Ozark Big-Eared Bats In Arkansas, J. D. Wilhide, V. Rick Mcdaniel, Michael J. Harvey, Daniel R. White Jan 1998

Telemetric Observations Of Foraging Ozark Big-Eared Bats In Arkansas, J. D. Wilhide, V. Rick Mcdaniel, Michael J. Harvey, Daniel R. White

Journal of the Arkansas Academy of Science

Ozark big-eared bat (Corynorhinus townsendii ingens) foraging activities were studied during 1995 in Marion County, Arkansas. Adult bats were equipped with radiotransmitters and tracked during June and July. Foraging activities were generally within 1 kilometer (km) of the roost cave. Male bats ranged farther than females with the exception of one female that flew 2.5 km into a different watershed. Male big-eared bats and northern long-eared bats (Myotis septentrionalis) were also found within the maternity colony.

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Colonization Of An Ozark Mountain City By The Asian Tiger Mosquito (Aedes Albopictus), Shelley Pfitzner, David H. Jamieson, Larry A. Olson Jan 1998

Colonization Of An Ozark Mountain City By The Asian Tiger Mosquito (Aedes Albopictus), Shelley Pfitzner, David H. Jamieson, Larry A. Olson

Journal of the Arkansas Academy of Science

No abstract provided.

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Rediscovery Of Marsilea Vestita Subsp. Vestita In Pulaski County, Arkansas After 162 Years, Theo Witsell, William M. Shepherd Jan 1998

Rediscovery Of Marsilea Vestita Subsp. Vestita In Pulaski County, Arkansas After 162 Years, Theo Witsell, William M. Shepherd

Journal of the Arkansas Academy of Science

No abstract provided.

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Arkansas Range Extension Of The Seminole Bat (Lasiurus Seminolus), J. D. Wilhide, Brady Baker, David A. Saugey Jan 1998

Arkansas Range Extension Of The Seminole Bat (Lasiurus Seminolus), J. D. Wilhide, Brady Baker, David A. Saugey

Journal of the Arkansas Academy of Science

No abstract provided.

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