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Articles 1 - 22 of 22
Full-Text Articles in Life Sciences
Dragonflies (Odonata) Of The Ouachita National Forest, George L. Harp, Phoebe A. Harp
Dragonflies (Odonata) Of The Ouachita National Forest, George L. Harp, Phoebe A. Harp
Journal of the Arkansas Academy of Science
The Ouachita National Forest (ONF) was established in 1907 and encompasses 1.8 million acres (728,450 ha) in Arkansas and Oklahoma, almost entirely within the Ouachita Mountains Natural Division. The adult dragonfly species richness, seasonal and spatial distribution, and relative abundance were surveyed during 2002. Fifty-four collections were made at 43 sites during 10-19 May (20 collections), 10-22 July (19 collections) and 9-17 September (15 collections). Literature records were searched, as well as records from pertinent museums and individuals. Eighty-three species are reported here for the ONF, 77 of which were collected during 2002. Nehallenia integricollis newly reported for Arkansas, as …
Genetic Relationships Of Some Common Arkansas Freshwater Sunfishes (Centrarchidae: Lepomis) Inferred From Restriction Endonuclease Analysis Of Mitochondrial Dna, Ronald L. Johnson, K. Ashlei Williams
Genetic Relationships Of Some Common Arkansas Freshwater Sunfishes (Centrarchidae: Lepomis) Inferred From Restriction Endonuclease Analysis Of Mitochondrial Dna, Ronald L. Johnson, K. Ashlei Williams
Journal of the Arkansas Academy of Science
Geographic isolation and habitat specialization has aided in the evolution and maintenance of genetic integrity of the lepomid sunfishes (Lepomis: Centrarchidae) of North America. Our goal was to measure genetic distances between four of the eleven extant sunfish species by using mitochondrial DNA analysis. Mitochondrial DNA restriction fragment length polymorphisms (RFLPs) were examined in bluegill (L. macrochirus), redear sunfish (L. microlophus), longear sunfish (L. megalotis), and green sunfish (L. cyanellus) using 15 restriction endonucleases. The largemouth bass (Micropterus salmoides) was used as an outgroup. The phylogeny inferred from Dollo parsimony cladistic analysis largely concurred with published results from allozyme analyses …
Millipeds (Arthropoda: Diplopoda) Of The Ark-La-Tex. Iii. Additional Records From Arkansas, Chris T. Mcallister, Rowland M. Shelley, James T. Mcallister Iii
Millipeds (Arthropoda: Diplopoda) Of The Ark-La-Tex. Iii. Additional Records From Arkansas, Chris T. Mcallister, Rowland M. Shelley, James T. Mcallister Iii
Journal of the Arkansas Academy of Science
As part of an on-going effort by the second author (RMS) to elucidate the North American diplopod fauna, we collected millipeds in 14 Arkansas counties between April 2002 and October 2003. Additional information for these species is recorded from the holdings at the University of Arkansas Arthropod Museum along with unpublished records from other institutions in the second author's files. The following species were identified: Abacion tesselatum, A. texense, Aliulus caddoensis, Apheloria virginiensis ?reducta, Auturus evides, A. louisianus louisianus, Brachycybe lecontei, Brachyiulus lusitanus, B.pusillus, Cambala minor, Desmonus pudicus, Eurymerodesmus birdibirdi, E. polkensis, E. pulaski, E. serratus, Narceus americanus, Oriulus venustus, …
Rec12 (Spo11) Recominase Of Fission Yeast Promotes A Backup, Distributive Pathway For Chromosome Segregation In Meiosis I, Wallace D. Sharif, Mari K. Davidson, Wayne P. Wahls
Rec12 (Spo11) Recominase Of Fission Yeast Promotes A Backup, Distributive Pathway For Chromosome Segregation In Meiosis I, Wallace D. Sharif, Mari K. Davidson, Wayne P. Wahls
Journal of the Arkansas Academy of Science
We studied the relationship between recombination and segregation in the fission yeast Schizosaccharomyces pombe. In meiosis, chromosomes undergo two rounds of segregation to produce haploid meiotic products. Crossover meiotic ecombination (chiasmata) promotes chromosome segregation during meiosis I; achiasmatic chromosomes often suffer on disjunction in meiosis I. Recl2 protein is a topoisomerase IIortholog that introduces double-strand DNA breaks that nitiate recombination. The red2 null (deletion) and active site (Y98F) mutants lack recombination and crossovers, and onsequently suffer meiosis I nondisjunction. However, null mutants chromosomes segregate to opposite poles more frequently than predicted. Thus, fission yeast has a backup, "distributive segregation" pathway …
Reciprocal Translocation Reestablishes Breeding Status Of Mississippi Alluvial Plain Population Of Red-Cockaded Woodpeckers In Arkansas, William C. Holimon, Warren G. Montague
Reciprocal Translocation Reestablishes Breeding Status Of Mississippi Alluvial Plain Population Of Red-Cockaded Woodpeckers In Arkansas, William C. Holimon, Warren G. Montague
Journal of the Arkansas Academy of Science
No abstract provided.
Genetic Similarity Of Shadow And Arkansas Basses (Ambloplites) Determined By Mitochondrial Dna Analysis, Ronald L. Johnson, Carrie F. Cavenaugh
Genetic Similarity Of Shadow And Arkansas Basses (Ambloplites) Determined By Mitochondrial Dna Analysis, Ronald L. Johnson, Carrie F. Cavenaugh
Journal of the Arkansas Academy of Science
No abstract provided.
Fishes Of The Red River In Arkansas, Thomas M. Buchanan, Drew Wilson, L. G. Claybrook, William G. Layher
Fishes Of The Red River In Arkansas, Thomas M. Buchanan, Drew Wilson, L. G. Claybrook, William G. Layher
Journal of the Arkansas Academy of Science
Fishes were collected from Red River mainstem habitats in Arkansas with seines, rotenone, hoop nets, gill nets, and trotlines from 1995 through 2001. Seventy-two species were identified distributed among 17 families, and 15 species were new records for the Red River in Arkansas. Eighty-three species are now historically known from the Arkansas segment of the Red River. Approximately 67% of the fishes known from the entire Red River have been found in the Arkansas segment, which is only 11% of the entire river length. Baseline data on the fish fauna of the Red River is critical for the analysis of …
Nesting Willow Flycatchers Discovered At Harrison, Arkansas, William C. Holimon, Douglas A. James
Nesting Willow Flycatchers Discovered At Harrison, Arkansas, William C. Holimon, Douglas A. James
Journal of the Arkansas Academy of Science
The Willow Flycatcher, Empidonax traillii (Audubon), was a newly discovered species when John James Audubon found it at Arkansas Post in 1822. The bird was fairly common in summer in prairie-scrub habitat around Arkansas at least until the 1950s. There after numbers declined until one or two individuals were found occasionally at a single site in Benton County in the late 1980s through 1990s. We found a population consisting of three nesting territories on Baker Prairie Natural Area in Harrison, Boone County, Arkansas. This represents the first confirmed nesting since 1990 and only the second since 1969. A nest with …
Use Of Irradiated And Formalin-Fixed Trichomonas Vaginalis To Examine Protective Immune Responses In The Mouse Intraperitoneal Model, Terryl L. Hostetler, James J. Daly, Timothy J. O'Brien, Max L. Baker
Use Of Irradiated And Formalin-Fixed Trichomonas Vaginalis To Examine Protective Immune Responses In The Mouse Intraperitoneal Model, Terryl L. Hostetler, James J. Daly, Timothy J. O'Brien, Max L. Baker
Journal of the Arkansas Academy of Science
Gamma irradiated Trichomonas vaginalis was used to initiate a protective immune response in mice by intraperitoneal inoculation using host mortality as the measure of virulence. Irradiated trichomonads of a virulent strain gave some immune protection but no more so than the use of formalin-fixed, virulent trichomonads. A formalin-fixed virulent strain combined with complete Freund's adjuvant (CFA) gave complete protection. Metabolically produced antigens do not appear to be important in conferring protective immunity in these experiments. A common laboratory strain of T. vaginalis (ATCC 30001) was used as an avirulent control. It gave no protection against a virulent strain. Combining CFA …
Status And Distribution Of Freshwater Mussels (Unionacea) Inhabiting The Saline River / Holly Creek Bottoms Area, Saline County, Arkansas, Chris L. Davidson, Dave Gosse
Status And Distribution Of Freshwater Mussels (Unionacea) Inhabiting The Saline River / Holly Creek Bottoms Area, Saline County, Arkansas, Chris L. Davidson, Dave Gosse
Journal of the Arkansas Academy of Science
No abstract provided.
Gyratrix Hermaphroditus: A State Record For Arkansas, Jane Dunn
Gyratrix Hermaphroditus: A State Record For Arkansas, Jane Dunn
Journal of the Arkansas Academy of Science
No abstract provided.
Nuclear Ribosomal Its Region Sequences For Differentiation Of Rubus Genotypes, Eric T. Stafne, John R. Clark, Allen L. Szalanski
Nuclear Ribosomal Its Region Sequences For Differentiation Of Rubus Genotypes, Eric T. Stafne, John R. Clark, Allen L. Szalanski
Journal of the Arkansas Academy of Science
Previous molecular investigations into Rubus species diversity have yielded significant knowledge about species relatedness. However, little work has been focused at the cultivar level. Random amplified polymorphic DNA(RAPD)-PCR studies have successfully differentiated closely related cultivars. The ability to definitively distinguish blackberry and red raspberry cultivars based on other molecular methods could prove useful in many aspects of breeding and proprietary protection. In this study, the nuclear ribosomal DNA internal transcribed spacer regions (ITS) of six Rubus cultivars were sequenced. DNA sequencing revealed little genetic variation among blackberry cultivars, but revealed distinctions between blackberry and red raspberry cultivars. Analysis by maximum-parsimony …
Quantifying Forest Ground Flora Biomass Using Proximal Sensing, Paul F. Doruska, Robert C. Weih Jr., Matthew D. Lane, Don C. Bragg
Quantifying Forest Ground Flora Biomass Using Proximal Sensing, Paul F. Doruska, Robert C. Weih Jr., Matthew D. Lane, Don C. Bragg
Journal of the Arkansas Academy of Science
Current focus on forest conservation and forest sustainability has increased the level of attention given to measures of ground flora in forest ecosystems. Traditionally, such data are collected via time- and resource-intensive methods of field identification, clipping, and weighing. With increased focus on community composition and structure measures of forest ground flora, the manner in which these data are collected must change. This project uses color and color infrared digital cameras to proximally sense forest ground flora and to develop regression models to predict green and dry biomass (g/m^) from the proximally sensed data. Traditional vegetative indices such as the …
Subterranean Biodiversity Of Arkansas, Part 1: Bioinventory And Bioassessment Of Caves In The Sylamore Ranger District, Ozark National Forest, Arkansas, G. O. Graening, Michael E. Slay, Karen K. Tinkle
Subterranean Biodiversity Of Arkansas, Part 1: Bioinventory And Bioassessment Of Caves In The Sylamore Ranger District, Ozark National Forest, Arkansas, G. O. Graening, Michael E. Slay, Karen K. Tinkle
Journal of the Arkansas Academy of Science
Inventory and assessment of subterranean ecosystems of the Sylamore Ranger District (within Baxter, Marion, Searcy, and Stone counties) Ozark National Forest, was performed 2000 to 2002. The Sylamore District, completely underlaid in karst topography (occurring in Mississippian to Ordovician carbonates), contains approximately 10% of the known caves in Arkansas. Thirty-five sites were inventoried, six of which were sampled for environmental quality. These were combined and analyzed with previous studies, creating a database of 1,238 total species occurrences, 230 species, and 61 total sites. Most common were cave crickets, pipistrelle bats, woodrats, mosquitoes, and spiders. Fourteen species obligate to coves or …
On The Rare Endemic Hydrophyllum Brownei Kral & Bates (Browne's Waterleaf): New Population Information And A Recommendation For Change In Status, Travis D. Marsico
On The Rare Endemic Hydrophyllum Brownei Kral & Bates (Browne's Waterleaf): New Population Information And A Recommendation For Change In Status, Travis D. Marsico
Journal of the Arkansas Academy of Science
Hydrophyllum brownei Krai & Bates (Browne's waterleaf), newly described in 1991, is endemic to the Ouachita Mountain Natural Division of Arkansas. For the purpose of better understanding population parameters within which H. brownei grows, ranges of shade values, population extents, and population distance relationships to streams were measured. Hydrophyllum brownei grows in extremely high shade, in populations of widely varying sizes, and always in association with a stream system. In order to list species associated with H. brownei, vouchers of species assemblages were collected at the H. brownei sites visited. The species is designated as critically imperiled globally because of …
Geographic Distribution Records For Scolopendromorph Centipedes (Arthropoda: Chilopoda) From Arkansas, Oklahoma, And Texas, Chris T. Mcallister, Rowland M. Shelley, James T. Mcallister Iii
Geographic Distribution Records For Scolopendromorph Centipedes (Arthropoda: Chilopoda) From Arkansas, Oklahoma, And Texas, Chris T. Mcallister, Rowland M. Shelley, James T. Mcallister Iii
Journal of the Arkansas Academy of Science
During 2001-2003, we collected eight species of scolopendromorph centipedes from 17 counties of Arkansas (AR), seven counties of Oklahoma (OK), and 17 counties of Texas (TX). The following taxa were collected: Cryptops leucopodus (Rafinesque) from Bowie and Cass counties, TX, and Pulaski County, AR; Hemiscolopendra marginata (Say) from Columbia, Garland, Hempstead, Little River, Pike, Polk, and Yell counties, AR, and Cass, Cherokee, Coryell, Houston, Johnson, Kimble, Marion, Nacogdoches, Smith, and Tom Green counties, TX; Scolopocryptops rubiginosus L. Koch from Bowie and Dallas counties, TX; Scolopocryptops sexspinosus (Say) from Clark, Columbia, Conway, Faulkner, Hot Spring, Garland, Miller, Montgomery, Polk, Pope, and …
Herpetofaunal Inventory Of Arkansas Post National Memorial, Arkansas County, Arkansas, Malcolm L. Mccallum, Stanley E. Trauth, Robert G. Neal, Vernon E. Hoffman
Herpetofaunal Inventory Of Arkansas Post National Memorial, Arkansas County, Arkansas, Malcolm L. Mccallum, Stanley E. Trauth, Robert G. Neal, Vernon E. Hoffman
Journal of the Arkansas Academy of Science
The Arkansas Post National Memorial (ARPO) is a unique historical landmark with an interesting herpetofaunal community. We conducted an amphibian and reptile inventory of this national park from 2000-2002. We found eight amphibian and 21 reptilian species inhabiting the park. These included eight species not previously identified at ARPO. Overall species richness was highest at Alligator Slough, although the northern portion of ARPO was relatively rich. Aquatic trophic guilds included 7 (36.8%) piscivores, 7 (36.8%) omnivores, 4 (21.1%) insectivores, and one (5.3%) carnivore. The terrestrial trophic guilds included 13 (76.5%) insectivores, 2 (11.8%) carnivores, and 1 (5.9%) each of omnivores …
Experimental Channel Catfish Virus Infection Mimics Natural Infection Of Channel Catfish, Robin L. Stingley, Wayne L. Gray, Billy R. Griffin, Reid Landes
Experimental Channel Catfish Virus Infection Mimics Natural Infection Of Channel Catfish, Robin L. Stingley, Wayne L. Gray, Billy R. Griffin, Reid Landes
Journal of the Arkansas Academy of Science
Channel catfish virus (CCV) causes a severe hemorrhagic disease in channel catfish fry and fingerlings. CCV epizootics are associated with elevated water temperatures and high mortality rates. Survivors of acute disease are latently infected with i virus. In this study, we investigated conditions effecting CCV pathogenesis and latency utilizing an experimental immersion model to simulate natural infection and a population of Arkansas catfish verified to have no prior CCV exposure, the results indicate that the Auburn- 1 laboratory strain is comparable to CCV field isolates in virulence and ability to establish latent infection. The study confirms that water temperature and …
Dna Sequence Analysis Of The Freshwater Mussel Lampsilis Hydiana (Bivalva: Unionidae) In Select Ozark And Ouachita Mountain Streams Of Arkansas, Jennifer A. Lewter, Allen L. Szalanski, Tsunemi Yamashita
Dna Sequence Analysis Of The Freshwater Mussel Lampsilis Hydiana (Bivalva: Unionidae) In Select Ozark And Ouachita Mountain Streams Of Arkansas, Jennifer A. Lewter, Allen L. Szalanski, Tsunemi Yamashita
Journal of the Arkansas Academy of Science
No abstract provided.
Acoustic Mapping Of Aquatic Vegetation In Lakes: An Example From Northwest Arkansas, Angela M. Polly, Stephen K. Boss
Acoustic Mapping Of Aquatic Vegetation In Lakes: An Example From Northwest Arkansas, Angela M. Polly, Stephen K. Boss
Journal of the Arkansas Academy of Science
No abstract provided.
New Records Of The Eastern Chipmunk (Tamias Striatus) From Arkansas, D. Blake Sasse
New Records Of The Eastern Chipmunk (Tamias Striatus) From Arkansas, D. Blake Sasse
Journal of the Arkansas Academy of Science
No abstract provided.
Subterranean Biodiversity Of Arkansas, Part 2: Status Update Of The Foushee Cavesnail, Amnicola Cora Hubricht, 1979 (Mollusca: Gastropoda: Hydrobiidae), G. O. Graening
Journal of the Arkansas Academy of Science
No abstract provided.