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Microgeographic Variation In The Mexican Vole, Microtus Mexicanus, Meredith J. Hamilton, Gary A. Heidt
Microgeographic Variation In The Mexican Vole, Microtus Mexicanus, Meredith J. Hamilton, Gary A. Heidt
Journal of the Arkansas Academy of Science
Altitudinal variation was assessed in 115 (62 male; 53 female) Mexican voles (Microtus mexicanus) from six localities in Jalisco, Mexico. Univariate and multivariate statistical techniques were employed in the data analyses. A total of 49 skeletal measurements were investigated, and of these, 17 showed significant interlocality variation. Rostral breadth, depth of braincase, rostral height, width of third molar and nasal length were found to be the most variable characters. Component I (a size factor) accounted for 36% of the total phenetic variation; components II and III accounted for 30% and 19%, respectively. Larger individuals were found to occur at lower …
Influence Of Degray Reservoir On Zooplankton Populations In The Caddo And Ouachita Rivers, Ralph B. Roseberg, Mark Karnes
Influence Of Degray Reservoir On Zooplankton Populations In The Caddo And Ouachita Rivers, Ralph B. Roseberg, Mark Karnes
Journal of the Arkansas Academy of Science
No abstract provided.
Postnatal Osteology Of The Northern Grasshopper Mouse, Onychomys Leucogaster, Joe W. Bailey, Gary A. Heidt
Postnatal Osteology Of The Northern Grasshopper Mouse, Onychomys Leucogaster, Joe W. Bailey, Gary A. Heidt
Journal of the Arkansas Academy of Science
Two hundred forty-two specimens of Onychomys leucogaster, ranging in age from day of birth to the twenty-eighth day were cleared and stained using both Alizarin KOH and Alcian Blue/Alizarin-Trypsin staining methods. Thirty centers of ossification were studied. The data demonstrate the following: 1) skeletal centers of the appendicular skeleton ossify and mature earliest; 2) a new sesamoid bone lateral to the distal condyles of the femur was discovered; 3) the skeletal ossification of the baculum is present at one day of age; 4) a high degree of individual variation precludes aging of this species by skeletal maturation.
Temperature Preference And Tolerance Of Grass Carp (Ctenopharyngodon Idella), Marvin L. Galloway, Raj V. Kilambi
Temperature Preference And Tolerance Of Grass Carp (Ctenopharyngodon Idella), Marvin L. Galloway, Raj V. Kilambi
Journal of the Arkansas Academy of Science
Grass carp, acclimated at 24 °C, were tested for temperature preference in a laboratory, horizontal gradient tank. After a 6-day period of exploration the grass carp gravitated to a final thermal preferendum of 35 °C. In the temperature tolerance test the ultimate upper incipient lethal temperature (TL50), was estimated as 41.5°C. The results are compared to those of a similar study with hybrid carp (female grass carp x male bighead carp).
Toward A Concise Definition And Perspective For Biology, Arthur V. Brown, Kristine Basinger Brown
Toward A Concise Definition And Perspective For Biology, Arthur V. Brown, Kristine Basinger Brown
Journal of the Arkansas Academy of Science
The content of introductory biology courses at the high school and college levels are currently being re-examined. Many biological educators favor revision of the high school biology courses to a format that directly addresses current social issues to "promote good citizenship". We believe it would be more meaningful to teach the fundamental principles of biology, the study of living systems. Properly defining biology, by defining a living system, should help identify important topics to include in a basic biology course. Emphasis should be placed on subjects which would contribute most to the development of a basic understanding of how all …
Effect Of Edwardsiella Ictaluri Infection On Plasma Corticosterone Levels In Channel Catfish (Ictalurus Punctatus), Janice L. Cooper, Stanley N. David, John K. Beadles
Effect Of Edwardsiella Ictaluri Infection On Plasma Corticosterone Levels In Channel Catfish (Ictalurus Punctatus), Janice L. Cooper, Stanley N. David, John K. Beadles
Journal of the Arkansas Academy of Science
Channel catfish (Ictalurus punctatus) were innoculated with a new host specific bacterium, Edwardsiella ictaluri, to observe the influence of bacterial infection on plasma corticosterone levels at various temperatures. The fish were innoculated intraperitoneally. The infected fish were separated from the controls. Plasma corticosterone concentrations were determined by radioimmunoassay. The plasma corticosterone concentrations in non-innoculated catfish were about 6.15 ng/ml and nearly 5.63 ng/ml in the infected fish. The lower level of the hormone in the infected catfish was not significantly different from the control level. High temperature was a stress factor which increased plasma corticosterone levels whereas E. ictaluri retarded …
Fly Ash As A Fertilizer And Lime Source In Arkansas, Stanley L. Chapman
Fly Ash As A Fertilizer And Lime Source In Arkansas, Stanley L. Chapman
Journal of the Arkansas Academy of Science
Percent calcium carbonate equivalent (neutralizing value) of five fly ash samples ranged from 34 to 41. Field soils at three sites were treated with fly ash at rates that ranged from 1 to 6 tons per acre. Fly ash applications had opposite effects on extractable P, B, Fe, and Cu at Sites 1 and 2. A three-fold increase in total B occurred in wheat plants taken from one field treated with fly ash. At Site 3 test results of soil samples collected three, six, nine and twelve months after treatment showed that 2 tons of agricultural limestone was equivalent to …
Extracellular Phosphodiesterase From The Growth Medium Of The Myxomycete Physarum Flavicomum, Thomas J. Lynch, Mary E. Farrell
Extracellular Phosphodiesterase From The Growth Medium Of The Myxomycete Physarum Flavicomum, Thomas J. Lynch, Mary E. Farrell
Journal of the Arkansas Academy of Science
The plasmodium of the myxomycete Physarum flavicomum secretes cyclic AMP phosphodiesterase into the medium. The extracellular enzyme had a pH optimum between 7 and 8 and a Km of about 500 μM cyclic AMP and was inhibited by theophylline, caffeine and 3-isobutyl-l-methyxanthine (MIX). A marked decrease of enzyme activity was noted in the presence of EDTA, suggesting the requirement of Mg+ + by the enzyme. Addition of Mg+ + and Ca + + stimulated the enzyme while Zn+ + , Co+ + , Pb+ + , Mn+ + , Fe + + + , Ni+ + , and Cu + …
Summary Account Of The Carolina Parakeet In Arkansas, Daniel Mckinley, Douglas A. James
Summary Account Of The Carolina Parakeet In Arkansas, Daniel Mckinley, Douglas A. James
Journal of the Arkansas Academy of Science
The extinct Carolina Parakeet (Conuropsis carolinensis) once was part of the Arkansas avifauna. The first two reports of the species in what is now Arkansas were made in 1673 and 1718 by early French explorers. The remaining records are from the 1800s when parakeets were found in nearly all parts of the state, often in abundance. The last literature reference for the species still definitely occurring in Arkansas pertains to birds present in the summer of 1885 along the White River at Newport
Distribution And Efficiency Of Hydrocarbon-Oxidizing Bacteria In A Freshwater Reservoir, Carol H. Smedley, Jimmy D. Bragg, Aubrey B. Gosnell
Distribution And Efficiency Of Hydrocarbon-Oxidizing Bacteria In A Freshwater Reservoir, Carol H. Smedley, Jimmy D. Bragg, Aubrey B. Gosnell
Journal of the Arkansas Academy of Science
Hydrocarbon-oxidizing bacteria were identified from three stations on DeGray Reservoir, Arkansas. The organisms were primarily gram-negative rods representing 9 taxa and 37 biotypes Pseudomonas spp. were the most common isolates. The largest populations were found in areas most frequently used by boaters, although seasonal fluctuations were apparent during the spring and fall. The degradation of outboard motor oil by the five most rapidly growing isolates was studied. Each species had a different decomposition profile, and substrate oxidation rates were variable Acinetobacter calcoaceticus var. anitratus was the most efficient decomposer.
Gas Chromortographic Analyses Of Biocrude-Producing Trees, Roy Z. Gehring, Bob D. Johnson
Gas Chromortographic Analyses Of Biocrude-Producing Trees, Roy Z. Gehring, Bob D. Johnson
Journal of the Arkansas Academy of Science
Gas chromotographic procedures were used to compare commercial diesel fuel with cyclohexane, ether, and methanol extracts from various tree species. Standard n-paraffin hydrocarbons ranging from C-10 thru C-34 were used as standards. These analyses indicated that several extracts, notably those from Juniper virginiana (juniper) and Pinus echinata (pine) trees of Northeast Arkansas and the Brazilian tree Copaifera langsdorffii (copaiba), contain numerous hydrocarbon and selected chemical products which serve as potential renewable biocrude sources.
Water Quality In The Gillham Lake-Cossatot River System During Dry And Wet Periods, Stephen B. Smith, Thomas E. Moen
Water Quality In The Gillham Lake-Cossatot River System During Dry And Wet Periods, Stephen B. Smith, Thomas E. Moen
Journal of the Arkansas Academy of Science
Water samples were collected in the Cossatot River-Gillham Lake system during an extended dry period and after heavy rains to determine the spatial variations in certain water quality characteristics. Of particular interest was the influence of the reservoir discharge on the water quality of the tailwater compared with the effects of four tributaries entering the tailwater below the reservoir. The water quality of the Cossatot River below Gillham Lake at low-flow (dry periods) and during the first 3 days after heavy rainfall (wet period) was influenced more by the tributaries entering the tailwater than by the reservoir water release. We …
Survival Of Trypanosoma Cruzi In Dead Chronically Infected Mice, Lawrence C. Hinck, James L. Stevens, Rogers D. Meurer
Survival Of Trypanosoma Cruzi In Dead Chronically Infected Mice, Lawrence C. Hinck, James L. Stevens, Rogers D. Meurer
Journal of the Arkansas Academy of Science
No abstract provided.
Helminths Of Common Grackles (Quiscalus Quiscula-Versicolor, Viellot) In Central Arkansas, Arthur A. Johnson
Helminths Of Common Grackles (Quiscalus Quiscula-Versicolor, Viellot) In Central Arkansas, Arthur A. Johnson
Journal of the Arkansas Academy of Science
No abstract provided.
Ultraviolet Light Reactivation Of Gamma-Ray Induces Chromosome Aberrations In G1 Phase Xenopus Cells, Susan Kulp, Linda Rogers, H. Gaston Griggs
Ultraviolet Light Reactivation Of Gamma-Ray Induces Chromosome Aberrations In G1 Phase Xenopus Cells, Susan Kulp, Linda Rogers, H. Gaston Griggs
Journal of the Arkansas Academy of Science
No abstract provided.
Water Crisis--An Approach For Teachers Of Grades 7-12, George L. Harp
Water Crisis--An Approach For Teachers Of Grades 7-12, George L. Harp
Journal of the Arkansas Academy of Science
No abstract provided.
Effect Of The Payment-In-Kind (Pik) Program On The Psorophora Columbiae Mosquito Population Of A Northeast Arkansas Ricefield Community, Larry A. Olson, Julia L. Reid
Effect Of The Payment-In-Kind (Pik) Program On The Psorophora Columbiae Mosquito Population Of A Northeast Arkansas Ricefield Community, Larry A. Olson, Julia L. Reid
Journal of the Arkansas Academy of Science
No abstract provided.
Effects Of Commercial Fish Removal On Sport Fish Populations In Two Arkansas Reservoirs, Tommie Crawford
Effects Of Commercial Fish Removal On Sport Fish Populations In Two Arkansas Reservoirs, Tommie Crawford
Journal of the Arkansas Academy of Science
Commercial netting occurred October through April, 1971-1976 on Nimrod Lake and from October through April, 1973-1977 on Blue Mountain Lake in west central Arkansas. Using 7.6 cm or larger mesh gill and/or trammel nets, commercial fishermen harvested commercial fishes (buffalofishes [Ictiobus spp.]; common carp [Cyprinus carpio], carpsuckers [Carpiodes spp.]; drum [Aplodinotus grunniens]; gars [Lepisosteus spp.]; suckers [Catostomidae); and catfishes [Ictalurus spp. and Pylodictis olivaris]). During the study period, cove rotenone samples were conducted on an annual basis. Fishes collected were placed into age classes and enumerated. Data were then grouped into general categories (black basses [Micropterus spp], crappie [Pomoxis spp.], …
Analysis Of Gray Fox (Urocyon Cinereoargenteus) Fur Harvests In Arkansas, Gary A. Heidt, James H. Peck, Lew Johnston
Analysis Of Gray Fox (Urocyon Cinereoargenteus) Fur Harvests In Arkansas, Gary A. Heidt, James H. Peck, Lew Johnston
Journal of the Arkansas Academy of Science
An investigation was conducted on gray fox (Urocyon cinereoargenteus) fur harvest in Arkansas. Data were gathered from a mail survey of Arkansas trappers and from Arkansas Game and Fish Commission fur harvest records from 1939 to 1983. Analyses of these data demonstrated: 1) gray fox were abundant statewide with lower levels in the Delta region; 2) there was a need for fox trappers to keep better records on their trapping efforts, success and composition of catch, including sex and age data; 3) market price: harvest correlation was high (r = 0.956, p < .001); 4) over the past 10 years, the Ozark Mountain region provided the greatest contribution to annual fox harvests, the Ouachita Mountain and Gulf Coastal Plain regions were similar to each other, but lower than the Ozarks, and the Delta region contributed the least, but with a generally stable harvest.
River Otter In Arkansas Iii. Characteristics Of Otter Latrines And Their Distribution Along Beaver-Inhabited Watercourses In Southwest Arkansas, Mark R. Karnes, C. Renn Tumlison
River Otter In Arkansas Iii. Characteristics Of Otter Latrines And Their Distribution Along Beaver-Inhabited Watercourses In Southwest Arkansas, Mark R. Karnes, C. Renn Tumlison
Journal of the Arkansas Academy of Science
Forty-one river otter (Lutra canadensis) fecal deposit (latrine) sites were located during April 1983 through March 1984 along beaver (Castor canadensis) inhabited watercourses in Clark, Nevada, and Ouachita counties, Arkansas. Latrine sizes ranged from 64 cm² to 5.01 m² (x-bar=0.30 m²; S.D. =0.88), and contained 2 to 78 scats per latrine (x-bar=9.2; S.D. = 13.8). The most common sites for latrines included elevated leaf or moss covered banks (51.2%), beaver lodges or bank dens (17.1 %), and beaver scent mounds (12.2%). Other latrine sites included felled logs over open water, bare soil along elevated banks, and exposed sandbars. Otter presence …
Some Studies On Introducing Castilleja Coccinea, Indian Paintbrush, Into Prairie Vegetation, Robert D. Wright
Some Studies On Introducing Castilleja Coccinea, Indian Paintbrush, Into Prairie Vegetation, Robert D. Wright
Journal of the Arkansas Academy of Science
Indian paintbrush, absent from many prairie remnants in Arkansas, behaves as a biennial in certain central Arkansas prairies, growing as a small rosette one season and flowering the next. It is known to be an indiscriminate root parasite. Field sowings were made in October, March and June. Annual change in population size was monitored for one of these sowings. Laboratory studies of germination were conducted to investigate the effects of light, temperature, water potential, and host species. Haustorial connections to host roots were examined. Based on these studies, a strategy for establishing the species in prairie was developed.
Protection Of Endangered Gray Bat (Myotis Grisescens) Colonies In Arkansas, Michael J. Harvey
Protection Of Endangered Gray Bat (Myotis Grisescens) Colonies In Arkansas, Michael J. Harvey
Journal of the Arkansas Academy of Science
No abstract provided.