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Articles 1 - 30 of 35
Full-Text Articles in Life Sciences
Genetic Family And Stock Type Influence Simulated Loblolly Pine Yields From Wet Sites, J. F. Dickson, Jimmie L. Yeiser, Richard A. Kleunder, J. L. Paschke
Genetic Family And Stock Type Influence Simulated Loblolly Pine Yields From Wet Sites, J. F. Dickson, Jimmie L. Yeiser, Richard A. Kleunder, J. L. Paschke
Journal of the Arkansas Academy of Science
Planting adapted families or a bulked seedlot of bare-root and container-grown-seedlings of loblolly pine (Pinus taeda L) were contrasted as cost effective alternatives for regenerating Arkansas' wet sites. Survival data from two wet sites were used to simulate 15 years of growth. Containerized seedlings provided 17% greater survival than bare-root seedlings, but yielded a lower present net worth than bare-root seedlings. Planting families adapted to excessive moisture provided 7% greater survival and yielded a greater present net worth than planting a bulked seedlot consisting of adapted and poorly adapted families.
Recent Collections Of Fishes From The Spring River Drainage In Northeast Arkansas, Steve C. Baker, Michael L. Armstrong
Recent Collections Of Fishes From The Spring River Drainage In Northeast Arkansas, Steve C. Baker, Michael L. Armstrong
Journal of the Arkansas Academy of Science
No abstract provided.
Striped Bass Scale Analysis By Scanning Electron Microscopy For Delineation Of Annuli, Barry L. Barnoski, Raj V. Kilambi
Striped Bass Scale Analysis By Scanning Electron Microscopy For Delineation Of Annuli, Barry L. Barnoski, Raj V. Kilambi
Journal of the Arkansas Academy of Science
No abstract provided.
Reported Bat Rabies In Arkansas, Gary A. Heidt, David A. Saugey, Susan R. Bradford-Luck
Reported Bat Rabies In Arkansas, Gary A. Heidt, David A. Saugey, Susan R. Bradford-Luck
Journal of the Arkansas Academy of Science
No abstract provided.
Status Report Of The Fern Woodsia Scopulina In Arkansas, James H. Peck, Carol J. Peck
Status Report Of The Fern Woodsia Scopulina In Arkansas, James H. Peck, Carol J. Peck
Journal of the Arkansas Academy of Science
No abstract provided.
Discovery Of Lycopodium Communities In The Gulf Coastal Plain Region Of Arkansas, James H. Peck, Carol J. Peck, Steve L. Orzell, Edwin Bridges, Carl Amason
Discovery Of Lycopodium Communities In The Gulf Coastal Plain Region Of Arkansas, James H. Peck, Carol J. Peck, Steve L. Orzell, Edwin Bridges, Carl Amason
Journal of the Arkansas Academy of Science
No abstract provided.
Photoreactivation Of Lethal Damage Induced In Hamster X Xenopus Hybrid Cells And Their Parentals By Uv Light, David Bohlender, Stuart Williams, Emir Cruz, H. Gaston Griggs
Photoreactivation Of Lethal Damage Induced In Hamster X Xenopus Hybrid Cells And Their Parentals By Uv Light, David Bohlender, Stuart Williams, Emir Cruz, H. Gaston Griggs
Journal of the Arkansas Academy of Science
A85 Xenopus cells that exhibited a high level of photoreactivation (PR) and V79B2 hamster cells that exhibited little PR were fused to produce the V79B2 x A85 cell line — a hybrid line which possessed a relatively stable karyotype, with most cells containing the entire V79B2 and A85 genomes. UV and UV plus PR fluence-survival relations were then determined and compared for the hybrid and parental lines in a first attempt to elucidate interactions of the parental PR mechanisms in the hybrid. It was anticipated that the A85 genome in the hybrid would produce PR enzyme in sufficient concentration and …
Hyla Versicolor-Chrysoscelis Species Complex Of Gray Treefrogs In Arkansas: Histological And Ultrastructural Evidence, Phyllis Chaffin, Stanley E. Trauth
Hyla Versicolor-Chrysoscelis Species Complex Of Gray Treefrogs In Arkansas: Histological And Ultrastructural Evidence, Phyllis Chaffin, Stanley E. Trauth
Journal of the Arkansas Academy of Science
We investigated the Hyla versicolor-chrysoscelis species complex (tetraploid and diploid species, respectively) of cryptic gray treefrogs from Arkansas using light and scanning electron microscopy. From previous studies of this treefrog complex in other states, H. versicolor has been shown to exhibit larger nuclear diameters and larger toe pad epithelial cells than H. chrysoscelis. Based upon average nuclear diameters of eyelid epithelial cells, we found two or possibly three groups of frogs. The presumed H. versicolor exhibited greatly enlarged toe pad epithelial cells using scanning electron microscopy and were found in four counties, three of which are in the Ozark Mountains. …
Dimilin For Control Of Lernaea In Golden Shiner Ponds, Gary Burtle, John Morrison
Dimilin For Control Of Lernaea In Golden Shiner Ponds, Gary Burtle, John Morrison
Journal of the Arkansas Academy of Science
A single application of Oimilin (UNIROYAL),diflubenzuron, was tested in 9 (nine) ponds containing golden shiner minnows, Notemigonus crysoleucas, infested with the parasitic copepod Lernaea cyprinacea. The chemical was applied at a rate of1 0 or 30 pg/l and compared to untreated controls. Fish were periodically sampled to determine levels of infestation, and zooplankton numbers were monitored for chemical effect. Oimilin treatment significantly reduced (P < 0.05) parasite infestation four to eight days after treatment. No significant difference (P < 0.05) was noted between the two levels of treatment. Zooplankton populations decreased in the Dimilin treated ponds following chemical application. Rotifer populations rebounded later during the period, but copepod populations in the ponds treated with 30 ng/L remained depressed from two days after treatment for one month until the study ended. Complete parasite control was not obtained with either chemical concentration using a single application. These results suggest that a single treatment is not effective for Lernaea control. Future research will test two applications 10 days apart at the 10 and 30 /xg/L levels.
Distribution Of Fish Within Headwater Riffles Of The Illinois River System, Washington County, Arkansas, Danny J. Ebert, Arthur V. Brown, Carolyn B. Fielder
Distribution Of Fish Within Headwater Riffles Of The Illinois River System, Washington County, Arkansas, Danny J. Ebert, Arthur V. Brown, Carolyn B. Fielder
Journal of the Arkansas Academy of Science
Quantitative sampling of fish was performed in five headwater riffles of the Illinois River System, Washington County, Arkansas during low flow conditions. This study revealed differing fish species composition, biomass and feeding guild segregation between head and tail riffle reaches in 1st through 3rd order. Thirty species representing 10 families were identified. Of this number, darters (Percidae), sculpins (Cottidae), madtoms (Ictaluridae), and central stonerollers (Campostoma anomalum) (Cyprinidae) comprised 67 to 98 percent of riffle head populations. Fish biomass was greater for riffle head areas (0.58-6.6/0.28-2.0 g/m2 ) within sectivores and herbivores dominating. Total fish numbers decreased from riffleheads to tails, …
Distribution And Status Of Rare And Endangered Mussels (Mollusca: Margaritiferidae, Unionidae) In Arkansas, John L. Harris, Mark E. Gordon
Distribution And Status Of Rare And Endangered Mussels (Mollusca: Margaritiferidae, Unionidae) In Arkansas, John L. Harris, Mark E. Gordon
Journal of the Arkansas Academy of Science
Knowledge of the distribution and population status of freshwater bivalves occurring in Arkansas has increased markedly during the past decade. Sufficient data has become available to delineate species which are rare and/or endangered within the state. Historical and recent records from Arkansas exist for four mussels currently listed as federally endangered species: the fat pocketbook (Potamilus capax), the pink mucket (Lampsilis orbiculata), Curtis' pearly mussel (Epioblasma florentina curtisi), and the turgid-blossom pearly mussel (Epioblasma turgidula). Ten additional mussels which occur or were thought to occur in Arkansas are being considered for federal protection by the United States Fish and Wildlife …
Infection Rate Of Tall Fescue With Acremonium Coenephialum, B. J. Hankins, Terry Kirkpatrick
Infection Rate Of Tall Fescue With Acremonium Coenephialum, B. J. Hankins, Terry Kirkpatrick
Journal of the Arkansas Academy of Science
No abstract provided.
Spectrophotomatic Assay For The Enzyme Catalyzed Reaction Of 4-Nitroquinoline 1-Oxide With Glutathione, J. Steven Stanley, Ann M. Benson
Spectrophotomatic Assay For The Enzyme Catalyzed Reaction Of 4-Nitroquinoline 1-Oxide With Glutathione, J. Steven Stanley, Ann M. Benson
Journal of the Arkansas Academy of Science
4-Nitroquinoline 1-oxide (4NQO(is a toxic and carcinogenic compound that has been reported to be subject to conjugation with glutathione (GSH). This reaction may proceed non-enzymatically or be catalyzed by GSH transferases. The non-enzymatic rate for this reaction has been reported to be very high. The purposes of this investigation were to develop a spectrophotometric assay for the reaction of4NQO with GSH and to determine whether the rate for the enzyme catalyzed reaction was significant relative to the non-enzymatic reaction. The absorbance spectrum of 4NQO in phosphate buffer exhibited a maximum at 365 nm. Reaction of 4NQO with GSH was accompanied …
Effects Of Blue Tilapia/Channel Catfish Polyculture On Production, Food Conversion, Water Quality And Channel Catfish Off-Flavor, Les Torrans, Fran Lowell
Effects Of Blue Tilapia/Channel Catfish Polyculture On Production, Food Conversion, Water Quality And Channel Catfish Off-Flavor, Les Torrans, Fran Lowell
Journal of the Arkansas Academy of Science
Channel catfish (Ictalurus punctatus) monoculture ponds stocked with 10,000/ha of mixed- size catfish were compared to ponds stocked additionally with blue tilapia (Tilapia aurea). Ponds stocked with 5000/ha young-of-the-year blue tilapia produced 236 kg/ha less catfish, but tilapia biomass increased by 1020 kg/ha, averaging 233 g/fish. Ponds stocked with sexually mature tilapia in Aprilto provide forage to the catfish had increased catfish production but a poorer food conversion radio. Ponds stocked with sexually mature tilapia in June or July had catfish production and FCR's similar to the controls. Dissolved oxygen was significantly lower than the controls in all polyculture treatments. …
Cartographic Trend Analysis Of Furbearer Harvest Distributions In Arkansas, C. Renn Tumlison, Mark Trail, V. Rick Mcdaniel
Cartographic Trend Analysis Of Furbearer Harvest Distributions In Arkansas, C. Renn Tumlison, Mark Trail, V. Rick Mcdaniel
Journal of the Arkansas Academy of Science
Average by-county fur harvest for the last nine harvest seasons (1977-1985) was used as data points to be interpolated using nearest neighbor algorithms in computer-assisted trend analyses. COMPLOT maps were produced which represented a surface of harvest densities drawn over a map of Arkansas. Twelve furbearer species are examined, and "topographic" features of harvest density for each are interpreted in terms of ecology and/or buyer distribution. The trend surface technique removed some of the error inherent to harvest records, and produced an aesthetic graphical display of the information that was more easily interpreted and explained than other methods of analysis …
Selected Families Of Trichoptera In Arkansas, Veryl V. Board
Selected Families Of Trichoptera In Arkansas, Veryl V. Board
Journal of the Arkansas Academy of Science
No abstract provided.
Status Review Of The Threatened Ozark Cavefish (Amblyopsis Rosae), Arthur V. Brown, C. Stan Todd
Status Review Of The Threatened Ozark Cavefish (Amblyopsis Rosae), Arthur V. Brown, C. Stan Todd
Journal of the Arkansas Academy of Science
No abstract provided.
Effect Of City Effluent On The Diversity Of Aquatic Macroinvertabrates Of Sugar Creek, Clay County, Arkansas, Kay Cargill, George L. Harp
Effect Of City Effluent On The Diversity Of Aquatic Macroinvertabrates Of Sugar Creek, Clay County, Arkansas, Kay Cargill, George L. Harp
Journal of the Arkansas Academy of Science
No abstract provided.
New County Records Of Arkansas Vascular Flora From The University Of Central Arkansas Herbarium, Donald E. Culwell
New County Records Of Arkansas Vascular Flora From The University Of Central Arkansas Herbarium, Donald E. Culwell
Journal of the Arkansas Academy of Science
No abstract provided.
Yellow Rail (Coturnicops Novaborancensis) With Dark Plumage From Arkansas, Douglas A. James
Yellow Rail (Coturnicops Novaborancensis) With Dark Plumage From Arkansas, Douglas A. James
Journal of the Arkansas Academy of Science
No abstract provided.
Efficiency Of Different Storage Methods For Preserving Lake Trout (Salvelinus Namacush) Eye Tissue, Basil L. Joiner, Joseph R. Sylvester, Harold L. Kincard
Efficiency Of Different Storage Methods For Preserving Lake Trout (Salvelinus Namacush) Eye Tissue, Basil L. Joiner, Joseph R. Sylvester, Harold L. Kincard
Journal of the Arkansas Academy of Science
No abstract provided.
Arkansas Pteridophyte Flora Update: A New Checklist And Additional County-Level Occurrence Records, James H. Peck, Carol J. Peck, W. Carl Taylor
Arkansas Pteridophyte Flora Update: A New Checklist And Additional County-Level Occurrence Records, James H. Peck, Carol J. Peck, W. Carl Taylor
Journal of the Arkansas Academy of Science
No abstract provided.
Application Of Geligam Software To The Analysis Of X-Ray Spectra, R. S. Saunders, Harold L. Pray, H. B. Eldridge
Application Of Geligam Software To The Analysis Of X-Ray Spectra, R. S. Saunders, Harold L. Pray, H. B. Eldridge
Journal of the Arkansas Academy of Science
No abstract provided.
Clinostomum Marginatum Metacercaria: Incidence In Smallmouth Bass From A North Arkansas Stream And In Vitro Oxygen Consumption Studies, James J. Daly, Howard H. Conaway, Terryl L. Hostetler, H. Michael Matthews
Clinostomum Marginatum Metacercaria: Incidence In Smallmouth Bass From A North Arkansas Stream And In Vitro Oxygen Consumption Studies, James J. Daly, Howard H. Conaway, Terryl L. Hostetler, H. Michael Matthews
Journal of the Arkansas Academy of Science
Small mouth bass (Micropterus dolomieui) captured from Crooked Creek (Marion Co., Arkansas) in the summers of 1977 and 1987 were found to have a high incidence of infection with the metacercaria of Clinostomum marginatum (yellow grub). Of 41 fish collected in 1977, 32 (78%) were found infected with metacercariae with some fish containing large numbers of parasites. The number of larvae per fish ranged from 1 to 184, with an average of 23.2 ± 38 per smallmouth. Eighty-six percent of the bass collected in 1987 were found positive for C. marginatum. The number of metacercariae per fish ranged from 1 …
Residual Pesticides In Fishes From Lake Chicot, Arkansas, C. M. Cooper, S. S. Knight
Residual Pesticides In Fishes From Lake Chicot, Arkansas, C. M. Cooper, S. S. Knight
Journal of the Arkansas Academy of Science
Samples of fish from isolated and flow-through portions of Lake Chicot, Arkansas, were analyzed for residual pesticide concentrations from 1978 and 1981. Where appropriate ecologically, fish flesh, viscera and whole fish, were analyzed for the common organochlorine insecticides DDT [1,1 ,1-trichloro -2,2bis(p-chlorophenyl)-ethane], DDE [1,1-dichloro-2,2-bis(p-chlorophenyl)-ethyene], DDD [1,1-dichloro -2,2-bis(p-chlorophenyl)-ethane], toxaphene (chlorinated camphene), chlordane, heptachlor, heptachlor epoxide, dieldrin, and endrin. DDT, DDT metabolites, and heptachlor were significantly (a = 0.05) higher in spotted gar (Lepisosteus oculatus) and yellow bullhead catfish (Ictalurus natalis) than in other species examined. Pesticide concentrations did not exceed the acceptable levels established by the U.S. Environmental Protection Agency although …
Distribution Of Fishes In Reference Streams Within Arkansas' Ecoregions, William E. Keith
Distribution Of Fishes In Reference Streams Within Arkansas' Ecoregions, William E. Keith
Journal of the Arkansas Academy of Science
The State of Arkansas has been subdivided into six ecoregions based on the homogeneity of land surface forms, potential natural vegetation, soil types and land uses. Reference streams of various sizes, excluding the large rivers, and with the least amount of point source and non-point source disturbances were selected for intensive physical, chemical and biological sampling. These data are to be used to characterize the streams and establish water quality criteria which will protect all stream uses. Fish communities of the reference streams were distinctively different among the ecoregions and can easily be used to characterize the waters of different …
Fur Trade Records From Arkansas Factory, Arkansas Post, Louisiana Territory, 1805-1810, Paul J. Polechla Jr.
Fur Trade Records From Arkansas Factory, Arkansas Post, Louisiana Territory, 1805-1810, Paul J. Polechla Jr.
Journal of the Arkansas Academy of Science
The United States government established a trading house at Arkansas Post in 1805 on the north bank of the Arkansas River in the newly purchased Louisiana Territory. The goal of this trading house was to foster good relations with the Quapaw tribe and other indigenous peoples. John B. Treat and his successors operated the post and meticulously recorded the number, value, and species of pelts traded. Tabulation of these records, which have been preserved in the National Archives, revealed that 9 or 10 species contributed a total of about 44,000 hides, worth approximately $18,000. White-tailed deer (Odocoileus virginianus) pelts comprised …
Influence Of Thresher Cylinder Speed And Grain Moisture At Harvest On Milling Yield Of Rice, R. H. Dilday
Influence Of Thresher Cylinder Speed And Grain Moisture At Harvest On Milling Yield Of Rice, R. H. Dilday
Journal of the Arkansas Academy of Science
The percentage of broken rice (Oryza sativa) kernels was determined after threshing the grain at varying cylinder speeds of the thresher and moisture contents of the grain at harvest. Moisture contents of the individual grain samples ranged from 12 to 26% and the two cylinder speeds were 600 and 1000 RPM. Significant differences between germplasm, cylinder speed and moisture content of the grain at harvest on milling yield was observed. For example, Newbonnet had the fewest broken kernels while Leah had the greatest amount of broken kernels. Lemont produced the highest total milling yield; whereas, L202 produced the lowest total …
Effects Of Stock Type And Planter Experience On The Time Required To Plant Loblolly Pine Seddlings, Richard A. Kluender, Jimmie L. Yeiser
Effects Of Stock Type And Planter Experience On The Time Required To Plant Loblolly Pine Seddlings, Richard A. Kluender, Jimmie L. Yeiser
Journal of the Arkansas Academy of Science
Inexperienced workers planted container-grown and bare-root seedlings of loblolly (Pinus taeda L.) on a rocky, upland site near Batesville, AR in a comparison of planting speed and survivability. Planting speed depended on the type of seedling planted and the amount of planting experience. Significantly less time was required to plant an acre with container-grown than bare-root seedlings. Experience increased the consistency and speed of planting for both seedling types.
Status Of The Instream Flow Issue In Arkansas, 1987, Stephen P. Filipek, William E. Keith, John Giese
Status Of The Instream Flow Issue In Arkansas, 1987, Stephen P. Filipek, William E. Keith, John Giese
Journal of the Arkansas Academy of Science
Expansion of Arkansas' population with concurrent increases in the state's domestic, industrial, and agricultural water uses and possible out-of-state diversion are placing substantial demands on the state's water resources. In an attempt to address this growing concern, Act 1051 (1985) of the Arkansas legislature was passed requiring the determination of present and future state water needs. A specific area of this mandate was the quantification of instream flow requirements. Basic instream flow needs are maintenance of the aquatic ecosystem and dependent riparian environment. Flow reservation may compliment other instream uses such as recreation, navigation, water quality, and groundwater recharge. However, …