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Articles 5221 - 5250 of 5634
Full-Text Articles in Life Sciences
Observations On The Occurrence Of Chalky Deposits On Forewings Of Oncometopia Orbona (F) (Homoptera: Cicadellidae), Mark A. Mayse
Observations On The Occurrence Of Chalky Deposits On Forewings Of Oncometopia Orbona (F) (Homoptera: Cicadellidae), Mark A. Mayse
Journal of the Arkansas Academy of Science
No abstract provided.
Ration/Density Comparisons With Caged Channel Catfish, Scott H. Newton, Walter R. Robison
Ration/Density Comparisons With Caged Channel Catfish, Scott H. Newton, Walter R. Robison
Journal of the Arkansas Academy of Science
No abstract provided.
Effects Of Purified Salmonella Enteritidis Endotoxin On The Immune Response Of Balb/C Mice, John B. Barnett, John W. Jutila
Effects Of Purified Salmonella Enteritidis Endotoxin On The Immune Response Of Balb/C Mice, John B. Barnett, John W. Jutila
Journal of the Arkansas Academy of Science
Wasting disease was produced in neonatal Balb/c mice with purified Salmonella enteritidis endotoxins. The endotoxins were chemically characterized to provide the study with a potent endotoxin with constant biological activity. Neonatal mice received an initial injection of 35 μg/g body weight of endotoxin and a dose of 75 μg every third day until day 18. The degree of wasting was estimated by the runting (weight loss) index. Mortality was calculated to be 46%, with a mean survival time of approximately 15 days. The hematologic studies conducted at days 10, 20, and 30 showed an absolute neutrophilia and leukocytosis by day …
Microhabitat Distribution And Its Effect Of Prey Utilization In Sympatric Populations Of Plethodon Glutinosus And Plethodon Dorsalis In Northwestern Arkansas, James M. Britton
Microhabitat Distribution And Its Effect Of Prey Utilization In Sympatric Populations Of Plethodon Glutinosus And Plethodon Dorsalis In Northwestern Arkansas, James M. Britton
Journal of the Arkansas Academy of Science
A study was done on sympatric populations of Plethodon glutinosus and P. dorsalis in northwestern Arkansas to determine the relative distribution of the two species and the relationship between their distribution and the utilization of available prey. Upon capture, total length, location, and habitat type were recorded for each salamander. Stomach content samples were obtained by forced regurgitation, and the animals were released. Samples of the local litter fauna were taken to determine prey availability. Habitat data were obtained for 171 salamanders; 76 P. glutinosus and 95 P. dorsalis. Stomach content samples were taken from 67 salamanders; 32 P. glutinosus …
Seasonal Abundance, Movement And Diversity Of Fishes In An Ozark Stream, Michael R. Dewey
Seasonal Abundance, Movement And Diversity Of Fishes In An Ozark Stream, Michael R. Dewey
Journal of the Arkansas Academy of Science
Seasonal fluctuations in fish abundance in Mud Creek occurred throughout the year at all sampling stations. At the two upper stations abundance was high and unstable during winter and early spring and decreased after heavy rainfall in mid-April. Abundance was low throughout the summer months, increasing in the fall due to large numbers of young-of-the-year. However, a different seasonal cycle occurred at the lower station which included deeper pools. Numbers were low and stable throughout the winter and early spring but high and unstable during the summer. Bigeye shiners (Notropis boops) and bluntnose minnows (Pimephales notatus) were the most mobile …
Biology Of The Striped Bass, Morone Saxatilis, In Beaver Reservoir, Arkansas, Raj V. Kilambi, Alex Zdinak Jr.
Biology Of The Striped Bass, Morone Saxatilis, In Beaver Reservoir, Arkansas, Raj V. Kilambi, Alex Zdinak Jr.
Journal of the Arkansas Academy of Science
Growth, length-weight relationship, maturation and food habits of striped bass from Beaver Reservoir were studied. No significant difference in growth in length between sexes was found. Growth of the Beaver Reservoir striped bass was similar to that of anadromous and freshwater populations. Males and females showed significant difference in length-weight relationship, and females exhibited isometric growth. The gonosomatic indices (GSI) of males ranged from 4.50 to 7.09 and were classified as mature fish. Female striped bass with GSI of 2.62 and above had three size groups of ova and were considered as maturing and mature. The food was primarily composed …
Classification And Protection Status Of Remnant Natural Plant Communities In Arkansas, William F. Pell
Classification And Protection Status Of Remnant Natural Plant Communities In Arkansas, William F. Pell
Journal of the Arkansas Academy of Science
A classification and inventory of Arkansas's remaining tracts of relatively undisturbed vegetation was initiated in 1979. Based on extensive literature surveys and field work, the classification includes five physiognomic classes, 17 cover classes, and 46 cover types, arranged hierarchically. High quality examples of ten of the cover types have been located in designated wilderness or state natural areas, where they are protected by law, while an additional three occur in research natural areas or Forest Service special interest areas. The remaining 33 cover types have no known long-term protection. Lands having wilderness, state natural area, research natural area, or special …
Maturation, Spawning Period, And Fecundity Of The White Crappie, Pomoxis Annularis Rafinesque, In Beaver Reservoir, Arkansas, Janet L. Thomas, Raj V. Kilambi
Maturation, Spawning Period, And Fecundity Of The White Crappie, Pomoxis Annularis Rafinesque, In Beaver Reservoir, Arkansas, Janet L. Thomas, Raj V. Kilambi
Journal of the Arkansas Academy of Science
Gonosomatic indices and ovum diameter frequency distributions showed that the Beaver Reservoir white crappie spawns from late April through May. During the spawning season females release eggs more than once. Various stages of ovarian ovum development were described. Sexual maturity was found in 2-year-old females of 197 mm and 3-year-old and older fish. Regression analyses of fecundity on total length, weight and age of white crappie indicated that the fish weight was the best predictor of fecundity.
Non-Measles Hemadsorption In A Cell Line Persistently Infected With Measles Virus (Bgm/Mv), Jay H. Menna, John D. May
Non-Measles Hemadsorption In A Cell Line Persistently Infected With Measles Virus (Bgm/Mv), Jay H. Menna, John D. May
Journal of the Arkansas Academy of Science
Adsorption of Rhesus monkey erythrocytes to the plasma membranes of measles virus infected cells is frequently carried out to detect the presence of plasma membrane-associated measles virus hemagglutinin. The hemagglutinin is a viral genome-coded structural glycoprotein of the measles virion that is associated with the plasma membrane of the host cell during measles virus replication. BGM/MV, anon-virogenic line of African green monkey kidney cells persistently-infected with measles virus, adsorbed Rhesus monkey erythrocytes in an inverse fashion relative to the number of cells present in the culture and the time post-seeding. Serological studies employing the hemadsorption-inhibition and membrane immunofluorescence assay procedures, …
Fluorgraphic Technique For Detecting And Recording Chlorophyll And Its Derivatives On Paper And Thin-Layer Chromatograms, James L. Wickliff
Fluorgraphic Technique For Detecting And Recording Chlorophyll And Its Derivatives On Paper And Thin-Layer Chromatograms, James L. Wickliff
Journal of the Arkansas Academy of Science
Light from a blacklight lamp (General Electric BLB) is restricted to a waveband range 360 - 470 nm by cut-off filters consisting of 4cm 1 M aqueous CuSO4 and acrylic plastic sheets. This filtered lamp emission is used to excite the characteristic red fluorescence of chlorophyll and its derivatives on paper or thin-layer chromatograms. Fluorescent spots are detected and recorded by exposure of red-sensitive panchromatic photographic printing paper (Kodak Panalure) to the fluorescing chromatogram. A thin yellow filter interposed between the chromatogram and the photo print paper restricts the detected fluorescence to wavelengths greater than about 500 nm. Standard development …
Preliminary Report On The Fishes Of The Upper Saline River, Polk And Howard Counties, Arkansas, And Observations On Their Relationships With Land Use And Physiochemical Conditions, Stephen A. Sewell
Journal of the Arkansas Academy of Science
The Saline River of southwest Arkansas was impounded by Dierks Lake in 1975. Intensive collecting efforts were made in the river system above Dierks Lake during March, April, and May 1980. Collected specimens were compared with ichthyofaunal lists prior to impoundment. Historic occurrants which were not collected include Notropis amnis, Notropis ortenburgeri, Moxostoma duquesnei, Ammocrypta vivax, and Percina copelandi. Additions to the ichthyofaunal list for the drainage include Fundulus notatus, Etheostoma spectabile, and Percina caprodes. The evidence indicates that 33 species representing six families inhabit the system from the headwaters in Polk County, Arkansas, to Dierks Lake, Howard County, Arkansas. …
Observations On The Size And Fecundity Of The Least Brook Lamprey, Lampetra Aepyptera (Abbott) In Northcentral Arkansas, Chris T. Mcallister, Michael C. Wooten, Timothy L. King
Observations On The Size And Fecundity Of The Least Brook Lamprey, Lampetra Aepyptera (Abbott) In Northcentral Arkansas, Chris T. Mcallister, Michael C. Wooten, Timothy L. King
Journal of the Arkansas Academy of Science
No abstract provided.
Additional Records And Updates On The Arkansas Flora, Richard Davis
Additional Records And Updates On The Arkansas Flora, Richard Davis
Journal of the Arkansas Academy of Science
No abstract provided.
Lichens Of Arkansas Ii. Additional State Records Through Computer Search, Jewel E. Moore
Lichens Of Arkansas Ii. Additional State Records Through Computer Search, Jewel E. Moore
Journal of the Arkansas Academy of Science
No abstract provided.
Crowley's Ridge Biological Station--An Educational Center, Jewel E. Moore, Inez Hartsoe
Crowley's Ridge Biological Station--An Educational Center, Jewel E. Moore, Inez Hartsoe
Journal of the Arkansas Academy of Science
No abstract provided.
State Of Cytidine 3', 5' Cyclic Monophosphate (Cyclic Cmp) Research, Joseph E. Stone, Bruce E. Murphy
State Of Cytidine 3', 5' Cyclic Monophosphate (Cyclic Cmp) Research, Joseph E. Stone, Bruce E. Murphy
Journal of the Arkansas Academy of Science
No abstract provided.
Anomolies Of Bobcat Skulls (Felis Rufus) In Arkansas, C. Renn Tumlison, V. Rick Mcdaniel
Anomolies Of Bobcat Skulls (Felis Rufus) In Arkansas, C. Renn Tumlison, V. Rick Mcdaniel
Journal of the Arkansas Academy of Science
No abstract provided.
Immune Responses Of Rats To Antigens Of Moloney Leukemia Virus, Erratum, Frances B. Soderberg, Susan G. Tai, Joe M. Jones
Immune Responses Of Rats To Antigens Of Moloney Leukemia Virus, Erratum, Frances B. Soderberg, Susan G. Tai, Joe M. Jones
Journal of the Arkansas Academy of Science
No abstract provided.
Distribution Of Naegleria Fowleri In Selected Northeast Arkansas Lakes, Robert Dean Evans, Lawrence W. Hinck
Distribution Of Naegleria Fowleri In Selected Northeast Arkansas Lakes, Robert Dean Evans, Lawrence W. Hinck
Journal of the Arkansas Academy of Science
Seven northeast Arkansas recreational lakes were examined for the presence of pathogenic and nonpathogenic Naegleria fowleri. Cultural differentiation and microscopic morphology were used as species determining tests, while mouse pathogenicity tests were conducted to determine virulence. Only one isolate met all criteria utilized for definite identification of Naegleria fowleri, although Naegleria type organisms were found in all of the lakes. None of the isolates were pathogenic in mice.
Recent Mollusca Of Arkansas With Annotations To Systematics And Zoogeography, Mark E. Gordon
Recent Mollusca Of Arkansas With Annotations To Systematics And Zoogeography, Mark E. Gordon
Journal of the Arkansas Academy of Science
A total of 223 taxa of Mollusca are presently known from Arkansas. The geological history and geomorphology of the region, particularly the presence of the Interior Highlands, have been responsible for the development of a diverse molluscan fauna. Thirty regionally endemic forms are included among the 107 terrestrial gastropods, 36 aquatic gastropods, 65 unionacean mussels, and 15 sphaeriacean clams.
Potential Of Utilizing Scrap Processed Cheese As A Major Ration Component For Channel Catfish, Calvin J. Haskins, Scott H. Newton
Potential Of Utilizing Scrap Processed Cheese As A Major Ration Component For Channel Catfish, Calvin J. Haskins, Scott H. Newton
Journal of the Arkansas Academy of Science
Three cages (0.9 m³) were stocked with 200 channel catfish, Ictalurus punctatus Rafinesque, fingerlings (73.7 g avg.) in a 1.5 hectare pond. Two cheese rations were formulated and fed to the catfish; the first consisting of cheese, oil, and vitamin C (C + VC)and the second consisting of cheese, cottonseed meal, oil, trace minerals, and vitamins (CC + VM). A commercial trout ration (TC) was fed as a control. High mortalities occurred in the C + VC diet, thus resulting in premature removal of that cage from the study (after 86 days). A sample of 50 fish from the two …
Evaluation Of A Full-Fat Soybean Ration For Channel Catfish Production In Cages, Scott H. Newton, Walter R. Robison, Calvin J. Haskins
Evaluation Of A Full-Fat Soybean Ration For Channel Catfish Production In Cages, Scott H. Newton, Walter R. Robison, Calvin J. Haskins
Journal of the Arkansas Academy of Science
An experimental ration consisting of 50% full-fat soybeans, heated 170°C, was compared to a commercial trout chow in a 120-day feeding trial using two stocks of channel catfish, Ictalurus punctatus Rafinesque. Catfish were reared in 0.9 m³ floating cages, with 200 fish per cage, anchored in a 1.5 hectare farm pond. A Central Arkansas stock significantly outperformed a Southeast Arkansas stock for comparisons of net production and food conversion efficiency (FCE), with 92% greater production and 41% better FCE, respectively. Survival was 90% or greater for all fish. There was no significant difference in dress-out weight between the stocks. However, …
Remnant Prairie In Faulkner County, Arkansas?, Donald E. Culwell
Remnant Prairie In Faulkner County, Arkansas?, Donald E. Culwell
Journal of the Arkansas Academy of Science
No abstract provided.
Continuation Of Spider Research In Arkansas: Gulf Coastal Plains, Peggy Rae Dorris
Continuation Of Spider Research In Arkansas: Gulf Coastal Plains, Peggy Rae Dorris
Journal of the Arkansas Academy of Science
No abstract provided.
Profile Of Human-Rabid Skunk Contacts In Arkansas: 1977-1979, Dale V. Ferguson, Gary A. Heidt
Profile Of Human-Rabid Skunk Contacts In Arkansas: 1977-1979, Dale V. Ferguson, Gary A. Heidt
Journal of the Arkansas Academy of Science
No abstract provided.
Growth Patterns, Behavior And Food Items Fed To Nestling Great Horned Owls (Bubo Virginianus), Rodney Harris, Earl L. Hanebrink
Growth Patterns, Behavior And Food Items Fed To Nestling Great Horned Owls (Bubo Virginianus), Rodney Harris, Earl L. Hanebrink
Journal of the Arkansas Academy of Science
No abstract provided.
Observations On The Incidence Of Chiggers, Eutrombicula Alfreddugesi (Oudemans) On Crotaphytus (Sauria: Iguanidae) In Izard County, Arkansas, Chris T. Mcallister
Observations On The Incidence Of Chiggers, Eutrombicula Alfreddugesi (Oudemans) On Crotaphytus (Sauria: Iguanidae) In Izard County, Arkansas, Chris T. Mcallister
Journal of the Arkansas Academy of Science
No abstract provided.
Implications And Considerations Concerning The Status, Habitat And Distribution Of The Least Brook Lamprey, Lampetra Aepyptera (Abbott) (Pisces: Petromyzontidae) In Arkansas, Stephen A. Sewell, F. Allen Carter, Chris T. Mcallister
Implications And Considerations Concerning The Status, Habitat And Distribution Of The Least Brook Lamprey, Lampetra Aepyptera (Abbott) (Pisces: Petromyzontidae) In Arkansas, Stephen A. Sewell, F. Allen Carter, Chris T. Mcallister
Journal of the Arkansas Academy of Science
No abstract provided.
Water Striders (Hemiptera: Gerridae) Of Arkansas, Paul D. Kittle
Water Striders (Hemiptera: Gerridae) Of Arkansas, Paul D. Kittle
Journal of the Arkansas Academy of Science
The taxonomy, distribution, and ecology of the water striders of Arkansas are discussed based on personal collections, museum specimens, and literature records. A total of 15 species representing six genera is presently known from the state. One additional species is included as probably occurring in Arkansas.
Heterochromatic Patterns In Drosophila Virilis Interphase Nuclei, William C. Guest
Heterochromatic Patterns In Drosophila Virilis Interphase Nuclei, William C. Guest
Journal of the Arkansas Academy of Science
No abstract provided.