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Articles 6781 - 6810 of 7164
Full-Text Articles in Entire DC Network
Publication Policies And Suggestions For Authors, Academy Editors
Publication Policies And Suggestions For Authors, Academy Editors
Journal of the Arkansas Academy of Science
No abstract provided.
Unusual Concentration Of Scarlet Snakes, Keith B. Sutton, V. Rick Mcdaniel
Unusual Concentration Of Scarlet Snakes, Keith B. Sutton, V. Rick Mcdaniel
Journal of the Arkansas Academy of Science
No abstract provided.
Age And Growth Of White Crappie, Pomoxis Annularis Refinesque, From A Flood-Created Pond In Mississippi County, Arkansas, Stephen A. Sewell
Age And Growth Of White Crappie, Pomoxis Annularis Refinesque, From A Flood-Created Pond In Mississippi County, Arkansas, Stephen A. Sewell
Journal of the Arkansas Academy of Science
No abstract provided.
A Limnological Study Of Ricks Pond And The Gulpha Creek Drainage In Garland County, Arkansas, Tom M. Buchanan, James Houston, Joe F. Nix, Richard L. Meyer, Eugene H. Schmitz
A Limnological Study Of Ricks Pond And The Gulpha Creek Drainage In Garland County, Arkansas, Tom M. Buchanan, James Houston, Joe F. Nix, Richard L. Meyer, Eugene H. Schmitz
Arkansas Water Resources Center Technical Reports
A limnological investigation of Ricks Pond and the Gulpha Creek drainage of Garland County, Arkansas was conducted between 1 June 1978, and 21 August 1978. Water samples taken from ten stations on three different dates indicated that the stream and pond systems were typical in water quality characteristics of other small, high gradient streams and impoundments in the Ouachita Mountains of Arkansas. In Ricks Pond, thermal stratification occurred along with the development of an oxygen deficient zone below a depth of one meter. Other water quality parameters indicated that Ricks Pond is a moderately productive ecosystem, with the productivity limited …
Hydrolytic And Photochemical Degradation Of Organophosphorus Pesticides, James F. Hinton
Hydrolytic And Photochemical Degradation Of Organophosphorus Pesticides, James F. Hinton
Arkansas Water Resources Center Technical Reports
To keep pace with demands for increasing food supplies to satisfy the expanding world population, modern agriculture has utilized the latest scientific and technological knowledge available. Increases in crop production through the use of growth regulators, fertilizers , herbicides, and insecticides have been little short of phenomenal, and drugs, feed additives, and higher-quality grain and forage have dramatically increased livestock production. But, as is usually the case, this progress has been accompanied by problems, one of the more serious being contamination of our environment by chemicals. Only in recent years have the full effects of these pollutants on the ecological …
The Effects Of Heavy Metals On Algae Populations In A South Central Reservoir, Richard L. Meyer
The Effects Of Heavy Metals On Algae Populations In A South Central Reservoir, Richard L. Meyer
Arkansas Water Resources Center Technical Reports
The present investigation examines seasonal variations of algal assemblages in a south-central reservoir, Lake Fayetteville, Arkansas, in an attempt to evaluate the role of various trace metals in relation to these seasonal variations. Iron, manganese, cobalt, copper, lead and zinc concentrations were evaluated for the period of one year from March, 1976 to March, 1977 with concomitant examination of alga] assemblages. In addition to collection of this material, correlations between specific taxa and metals in the water fraction have been evaluated. A detailed literature review dealing with the role of micronutrients in various algal groups has been discussed by Rice …
Apis: Arkansas Planning Information System, William R. Draper, David B. Beasley, Theo A. Dillaha Iii, Ronald W. Skeith
Apis: Arkansas Planning Information System, William R. Draper, David B. Beasley, Theo A. Dillaha Iii, Ronald W. Skeith
Arkansas Water Resources Center Technical Reports
The Federal Water Pollution Control Act Amendments of 1972 call for the restoration and maintenance of the chemical, physical and biological integrity of the Nation's waters. The Act sets forth two primary goals; 1) the elimination of the discharge of all pollutants into the navigable waters of the United States by 1985 and 2) an interim level of water quality that provides for the protection of fish, shellfish, wildlife and recreation by July 1, 1983. Section 208 of the Act mandated the development and implementation of area wide water quality management plans to achieve the goals previously mentioned.
A Primary Ecological Survey Of Dardanelle Reservoir Prior To Nuclear Facility Effluent Discharge, Clarence B. Sinclair, Robert L. Watson
A Primary Ecological Survey Of Dardanelle Reservoir Prior To Nuclear Facility Effluent Discharge, Clarence B. Sinclair, Robert L. Watson
Arkansas Water Resources Center Technical Reports
A preliminary ecological survey of Dardanelle Reservoir during the construction phase of Arkansas Power and Light Company's nuclear generating facility was conducted from January 1970 through June 1974. The reservoir is characterized by relatively shallow depths and a high flow-thru rate. A number of features were associated with these characteristics. The reservoir carried a great deal of suspended material and exhibited high turbidities throughout most of the year. Typical thermal stratification and oxygen depletion were only rarely observed. Many of the physico-chemical parameters exhibited relatively high values in comparison to other Arkansas lakes and reservoirs, but due to absence of …
Zooplankton Limnology Of Beaver And Degray Reservoirs In Arkansas, Eugene H. Schmitz
Zooplankton Limnology Of Beaver And Degray Reservoirs In Arkansas, Eugene H. Schmitz
Arkansas Water Resources Center Technical Reports
Research during the year 1975-76 continued to emphasize studies of seasonal changes in patterns of zooplankton abundance and biomass in Beaver and DeGray Reservoirs. Zooplankton samples were taken monthly from three stations on Beaver Reservoir (Figure 1) during the period May 1975 through May 1976. Collections from DeGray Reservoir were made weekly from a single station (Station 1) during the period April 1975 through December 1975. Beaver collections were obtained by taking oblique tows using a Miller sampler equipped with no. 10 mesh. The DeGray program entailed stratified vertical samples taken at 5 intervals to 20 a and 20 m …
Radionuclide Concentrations In The Arkansas River Upstream And Downstream From The Nuclear I Power Generating Facility, D. M. Chittenden Ii
Radionuclide Concentrations In The Arkansas River Upstream And Downstream From The Nuclear I Power Generating Facility, D. M. Chittenden Ii
Arkansas Water Resources Center Technical Reports
This report summarizes results obtained from a program designed to measure very low levels of some commonly produced radionuc1ides in the Dardenelle Lake area of the Arkansas River near the Arkansas Nuclear I Power Station operated by Arkansas Power and Light Company. The main thrust of this program was to determine the increase in the concentration of the radionuclides as a result of reactor operation as a function of their distance from the source. It was hoped to extend this study to include the effects of these emissions on the uptake of radionuclides into biological systems and their deposition in …
Status Of The Endangered Ozark Big-Eared Bat (Plecotus Townsendii Ingens) In Arkansas, Michael J. Harvey, Michael L. Kennedy, V. Rick Mcdaniel
Status Of The Endangered Ozark Big-Eared Bat (Plecotus Townsendii Ingens) In Arkansas, Michael J. Harvey, Michael L. Kennedy, V. Rick Mcdaniel
Journal of the Arkansas Academy of Science
No abstract provided.
Publication Policies And Suggestions For Authors, Academy Editors
Publication Policies And Suggestions For Authors, Academy Editors
Journal of the Arkansas Academy of Science
No abstract provided.
Distribution Of Bats In The Delta Region Of Northeastern Arkansas, James E. Gardner, V. Rick Mcdaniel
Distribution Of Bats In The Delta Region Of Northeastern Arkansas, James E. Gardner, V. Rick Mcdaniel
Journal of the Arkansas Academy of Science
Eight taxa of bats are reported from seven counties in northeastern Arkansas. Localities, natural history notes, sex, age and reproductive condition are reported for most species. New records are combined with previously existing ones to reveal a greater distribution of chiroptera for the state
Methodology For Analysis Of Diet Grit Size On Molar Attrition For Fourche Maline And Caddo People, Judith C. Stewart, Mary L. Powell, J. C. Rose
Methodology For Analysis Of Diet Grit Size On Molar Attrition For Fourche Maline And Caddo People, Judith C. Stewart, Mary L. Powell, J. C. Rose
Journal of the Arkansas Academy of Science
Using the Murphy (1959) system for scoring the degree of dentin exposure, Fourche Maline (Woodland) molars show a greater attrition rate than Caddo (Mississippian) molars. Archeological evidence suggests that this differential in attrition rates is caused by the use of stone grinders for food preparation in the Fourche Maline culture and their absence among the Caddo. Analysis of scratches on the occlusal surface of molars from these samples confirms this hypothesis. Several techniques for observing these scratches and reconstructing the grit sizes and grit particle frequencies responsible for this differential abrasion are evaluated.
Additions To The Fish Fauna Of Piney Creek, Arkansas, William J. Matthews, Robert S. Matthews
Additions To The Fish Fauna Of Piney Creek, Arkansas, William J. Matthews, Robert S. Matthews
Journal of the Arkansas Academy of Science
No abstract provided.
An Evaluation Of The Effects Of Dredging Within The Arkansas River Navigation System - Volume I - Introduction, Summary And Conclusions, And Recommendations, Arkansas Water Resources Research Center
An Evaluation Of The Effects Of Dredging Within The Arkansas River Navigation System - Volume I - Introduction, Summary And Conclusions, And Recommendations, Arkansas Water Resources Research Center
Arkansas Water Resources Center Technical Reports
The foundation for the development of the Arkansas River was laid with the authorization of many upstream reservoirs in the comprehensive River and Harbor Act of 1946 signed by President Truman. Subsequent authorizations were forthcoming and work began on many of the bank stabilization facilities in 1950 and on the major structures in 1957. The current McClellan-Kerr Arkansas River Navigation System was substantially completed in 1972. The authorized multiple-purpose plan for the Arkansas River and tributaries provided for the construction of coordinated developments in the interests of navigation, hydroelectric power, flood control, bank stabilization, and related benefits including recreation and …
Radionuclide Concentrations In The Arkansas River Upstream And Downstream From The Nuclear Power Generating Facility, D. M. Chittenden, Ii
Radionuclide Concentrations In The Arkansas River Upstream And Downstream From The Nuclear Power Generating Facility, D. M. Chittenden, Ii
Arkansas Water Resources Center Technical Reports
No abstract provided.
62nd Annual Meeting, 1978. Secretary's Report And Financial Statement, Academy Editors
62nd Annual Meeting, 1978. Secretary's Report And Financial Statement, Academy Editors
Journal of the Arkansas Academy of Science
No abstract provided.
Proceedings Of The Arkansas Academy Of Science - Volume 32 1978, Academy Editors
Proceedings Of The Arkansas Academy Of Science - Volume 32 1978, Academy Editors
Journal of the Arkansas Academy of Science
No abstract provided.
Effects Of Hyperbaric Hypoxia On Some Enzyme Systems In The Mammalian Liver, Dennis A. Baeyens, M. J. Meier
Effects Of Hyperbaric Hypoxia On Some Enzyme Systems In The Mammalian Liver, Dennis A. Baeyens, M. J. Meier
Journal of the Arkansas Academy of Science
The metabolic effects of hypobaric hypoxic stress on the mammalian liver were studied. The lactate dehydrogenase (LDH) and succinate dehydrogenase (SDH) activity of mouse liver homogenates were measured after exposure to an equivalent altitude of 36,000 feet and compared to controls kept at zero altitude. After six and twelve hour incubation periods, the altitude exposed samples demonstrated a significantly higher LDH activity than controls. SDH activity remained unchanged from controls after six hours but was significantly lower than controls after a 12 hour exposure to altitude. It is concluded that the changes in enzyme activity reflect a metabolic control mechanism …
Distribution And Habitat Of The Taillight Shiner, Notropis Maculatus (Hay), In Arkansas, Henry W. Robison
Distribution And Habitat Of The Taillight Shiner, Notropis Maculatus (Hay), In Arkansas, Henry W. Robison
Journal of the Arkansas Academy of Science
The distribution of the taillight shiner, Notropis maculatus (Hay), within Arkansas is discussed based on personal collections, literature citations and a search of museum records. N. maculatus appears to be a typical Coastal Plain physiographic province inhabitant occurring below the Fall Line, and it nears its western and northern range limits west of the Mississippi River in Arkansas. Data are provided on preferred habitat, and suggestions are provided as to the current status of the taillight shiner within Arkansas.
Longevity Of White Bass In Beaver Reservoir, Arkansas, Thomas O. Duncan, Milton R. Myers Jr.
Longevity Of White Bass In Beaver Reservoir, Arkansas, Thomas O. Duncan, Milton R. Myers Jr.
Journal of the Arkansas Academy of Science
No abstract provided.
Dwight M. Moore Dedication, Robert T. Kirkwood
Dwight M. Moore Dedication, Robert T. Kirkwood
Journal of the Arkansas Academy of Science
No abstract provided.
Species Composition And Diversity Of Hawk Populations In Northeastern Arkansas, Earl L. Hanebrink, Keith B. Sutton, Alan F. Posey
Species Composition And Diversity Of Hawk Populations In Northeastern Arkansas, Earl L. Hanebrink, Keith B. Sutton, Alan F. Posey
Journal of the Arkansas Academy of Science
Species composition and diversity of hawk populations were analyzed for northeastern Arkansas by the use of roadside censuses conducted in September through April from 1974- 1977. Data from 10 years of Jonesboro Christmas Bird Counts were also analyzed. During the roadside survey 20,174 miles were driven and 1819 raptors were counted. Ten species were observed with the Red-tailed Hawk being most abundant followed by the Marsh Hawk and the American Kestrel. Eight species were recorded from the 10 years of Christmas Bird Counts. Annual breeding bird surveys and spot records turned up three additional species making a total of 14 …
Fishes Of The Mountain Province Section Of The Ouachita River, John L. Harris, Neil H. Douglas
Fishes Of The Mountain Province Section Of The Ouachita River, John L. Harris, Neil H. Douglas
Journal of the Arkansas Academy of Science
A survey of the fishes of the mountain province section of the Ouachita River from the headwaters to Remmel Dam using field collections, literature records, and museum collections showed the ichthyofauna to be made up of 80 species representing 16 families. Fourteen species not previously reported from the mountain province section of the river were collected in this survey. These species include Ichthyomyzon gagei, Nocomis asper, Notropis ortenburgeri, N. rubellus, Pimephales promelas, Moxostoma carinatum, Noturus taylori, Fundulus notatus, Lepomis humilis, Etheostoma histrio, E. proeliare, Percina maculata, P. nasuta, and P. uranidea. The Nocomis specimens were the first collected from the …
Effect Of Limestone On Spring Weed Populations In A Fertilized Coastal Bermudagrass Sod, H. C. Fulcher, Lyell F. Thompson
Effect Of Limestone On Spring Weed Populations In A Fertilized Coastal Bermudagrass Sod, H. C. Fulcher, Lyell F. Thompson
Journal of the Arkansas Academy of Science
No abstract provided.
62nd Annual Meeting, 1978. Program, Academy Editors
62nd Annual Meeting, 1978. Program, Academy Editors
Journal of the Arkansas Academy of Science
No abstract provided.
Range And Status Of The Nutria, Myocastor Coypus, In Arkansas, Joe W. Bailey, Gary A. Heidt
Range And Status Of The Nutria, Myocastor Coypus, In Arkansas, Joe W. Bailey, Gary A. Heidt
Journal of the Arkansas Academy of Science
An extensive survey has shown that the current range of the nutria, Myocastor coypus. in Arkansas should include the West Gulf Coastal Plain, the Mississippi Alluvial Plain (to Missouri) and the Arkansas Valley along the Arkansas River to Oklahoma. The extensive river and creek systems in the state have provided ready avenues for dispersal, allowing for extremely rapid expansion from the early 1960's when nutria were first observed in the southern part of the state. The current range probably represents most of the suitable habitat in the state and it is felt that further expansion will be held to a …
Ultraviolet Light Reactivation Of Gamma Ray-Induced Lethal Damage In Vertebrate Cells, Stewart W. Cross, H. Gaston Griggs
Ultraviolet Light Reactivation Of Gamma Ray-Induced Lethal Damage In Vertebrate Cells, Stewart W. Cross, H. Gaston Griggs
Journal of the Arkansas Academy of Science
A comparison was made of the extent of UVR of gamma ray induced lethal damage (mitigation of gamma ray-induced lethal effects by appropriate administration of low UV doses) in fish, amphibian, reptile and mammalian tissue culture cell lines. A significant level of UVR was detected in the non-mammalian lines, but the mammalian cells appeared to have lost this ability. Associated mitotic index data is interpreted as supporting the notion that low UV doses, appropriately administered, may aid repair processes in some cells (indirectly) by hindering the antagonistic metabolic processes which convert gamma ray induced lesions to a non-reversible state.
Movements Of Channel Catfish And Flathead Catfish In Beaver Reservoir, Northwest Arkansas, Thomas O. Duncan, Milton R. Myers Jr.
Movements Of Channel Catfish And Flathead Catfish In Beaver Reservoir, Northwest Arkansas, Thomas O. Duncan, Milton R. Myers Jr.
Journal of the Arkansas Academy of Science
A total of 497 channel catfish, Ictalurus punctatus, and flathead catfish, Pylodictis olivaris. were tagged in Beaver Reservoir during two November-April tagging periods (1967-68 and 1968-69); total recaptures were 9.5 and 11.7% respectively. The longest time between tagging and recapture was 1622 days (4.4 years) for channel catfish and 494 days (1.4 years) for flathead catfish. The longest distances traveled were 43.1 km by a channel catfish and 44.3 km by a flathead catfish. Fisherman returns indicated that catfish were caught primarily from April through July. The many recaptures, even after long periods, within 1.6 km of the tagging point, …