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Full-Text Articles in Life Sciences
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
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.
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 …
Influence Of Lead, An Environmental Pollutant On Metamorphosis Of Rana Utricularia (Amphibia: Ranidae), Gloria L. Yeung
Influence Of Lead, An Environmental Pollutant On Metamorphosis Of Rana Utricularia (Amphibia: Ranidae), Gloria L. Yeung
Journal of the Arkansas Academy of Science
The influence of lead, an environmental pollutant on metamorphosis of Rana utricularia, was examined in this study. Larvae of stage XI (Taylor and Kollros, 1946), beginning of the premetamorphic stage, were exposed to lead concentrations of 0.1 ppm, 0.5 ppm, 1.0 ppm and 1.5 ppm for 106 days. The untreated larvae served as controls. Larvae were observed from early limb bud stage, stage X, through the protrusion of the forelimbs, stage XX. Neither the sequence of developmental events nor the gross external and internal morphology was altered by lead. However, lead prolonged the time of metamorphosis by delaying the completion …
Presence Of An Unusual Eosinophilic Staining Substance In The Blood Of Snakes, James J. Daly Sr., Charles H. Calhoun
Presence Of An Unusual Eosinophilic Staining Substance In The Blood Of Snakes, James J. Daly Sr., Charles H. Calhoun
Journal of the Arkansas Academy of Science
No abstract provided.
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.
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.
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 …
Unusual Accumulation Of Bat Remains From An Ozark Cave, David A. Saugey, R. H. Baber, V. Rick Mcdaniel
Unusual Accumulation Of Bat Remains From An Ozark Cave, David A. Saugey, R. H. Baber, V. Rick Mcdaniel
Journal of the Arkansas Academy of Science
No abstract provided.
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.
Fishes Of Morrow Creek, A Lower Ouachita River Tributary, In Southern Arkansas, Henry W. Robison, Stephen A. Winters
Fishes Of Morrow Creek, A Lower Ouachita River Tributary, In Southern Arkansas, Henry W. Robison, Stephen A. Winters
Journal of the Arkansas Academy of Science
The fishes of Moro Creek, a fifth order stream tributary of the lower Ouachita River in southern Arkansas, were sampled from 1972-1977. Field collections, literature records and museum records revealed a total of 63 species representing 14 families. An undescribed cyprinid, the bluehead shiner, is reported from Moro Creek for the first time. In general, longitudinal zonation of fish species was apparent as species diversity increased downstream. Stream inhabitants were typical Coastal Plain fishes of the lower Ouachita River system.
Age And Growth Of Carp From Beaver Reservoir, Arkansas, Raj V. Kilambi, Walter R. Robison
Age And Growth Of Carp From Beaver Reservoir, Arkansas, Raj V. Kilambi, Walter R. Robison
Journal of the Arkansas Academy of Science
No abstract provided.
Scaled Chrysophyceae From Arkansas. Ii. The Genera Mallaomonas, Paraphysomonas And Spiniferomonas, Robert A. Andersen
Scaled Chrysophyceae From Arkansas. Ii. The Genera Mallaomonas, Paraphysomonas And Spiniferomonas, Robert A. Andersen
Journal of the Arkansas Academy of Science
This is the second paper of a floristic survey of the scaled Chrysophyceae of Arkansas and includes the following species: Mallomonax crassisquama, M. cratis var. Asmumdine, M. papillosa, M. caudata, M. heterospina, M. insignis, Paraph vsomonas vestita, P. imperforwa and Spiniferomonas conica
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 …
Fishes Of The Caddo River, Arkansas, After Impoundment Of Degray Lake, Michael R. Dewey, Thomas E. Moen
Fishes Of The Caddo River, Arkansas, After Impoundment Of Degray Lake, Michael R. Dewey, Thomas E. Moen
Journal of the Arkansas Academy of Science
Fifty-five collections of fishes were made with small-mesh seines and electrofishing gear in the Caddo River and four of its tributaries during 1974-75. Eighty-two species representing 17 families were collected; 14 of the species had not previously been reported from the Caddo River.
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, …
Renovation Of Nitrogenous Wastewater Via Land Application, John T. Gilmour, A. C. Peer, D. C. Regan
Renovation Of Nitrogenous Wastewater Via Land Application, John T. Gilmour, A. C. Peer, D. C. Regan
Journal of the Arkansas Academy of Science
Removal of inorganic and organic nitrogen from wastewater prior to recharge of ground and surface waters can be accomplished by judicious land application. This study focused attention upon the feasibility of using sprinkler irrigation as the wastewater delivery system with coastal bermudagrass (Cynodon dactylon L.,var. coastal) pasture as the wastewater sink. One site was located on a Sawyer soil near El Dorado, while the other was located on a Savannah soil near Malvern. This report is limited to the renovation of surface waters. Results revealed that nitrogen concentration in runoff water from rainfall was substantially less than nitrogen concentration of …
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 …
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.
Some Physiological And Morphological Adaptations For Underwater Survival In Natrix Rhombifera And Elaphe Obsoleta, Dennis A. Baeyens, Chris T. Mcallister, Leland F. Morgans
Some Physiological And Morphological Adaptations For Underwater Survival In Natrix Rhombifera And Elaphe Obsoleta, Dennis A. Baeyens, Chris T. Mcallister, Leland F. Morgans
Journal of the Arkansas Academy of Science
The submergence times of the diamondback water snake (Natrix rhombifera) and black rat snake (Elaphe obsoleta) were compared. Both species could easily survive underwater for periods greater than one hour. Furthermore, there was no difference in time of underwater survival in the two species. Some physiological and morphological parameters which may contribute to the ability of N. rhombifera and E. obsoleta to remain submerged were also examined. E. obsoleta was found to have a greater lung volume and larger and more numerous alveoli than N. rhombifera. Both species demonstrated a bradycardia upon submergence but it was less pronounced than the …
Summary Of The Status Of Harvest Mice, Cricetidae: Reithrodontomys, In Arkansas, V. Rick Mcdaniel, John C. Huggins, James A. Huggins, Michael W. Hinson
Summary Of The Status Of Harvest Mice, Cricetidae: Reithrodontomys, In Arkansas, V. Rick Mcdaniel, John C. Huggins, James A. Huggins, Michael W. Hinson
Journal of the Arkansas Academy of Science
Although four species of harvest mice, Reithrodoniomyx, are known to occur in Arkansas, the distributional status of the genus in the state is poorly understood. Recent museum specimens significantly extend the range of R. megalotix and R. fulvescens in the state. R. megalotis is shown to range south through Phillips Co. in eastern Arkansas, and R. fulvescens is shown to range throughout most of the state, now including most of the Mississippi Alluvial Plain. A new specimen of R. humulis from Delaware Co., Oklahoma, suggests that this species probably ranges throughout northwestern Arkansas. R montanus remains known only from Washington …
Loss Of Larval Fish By Epilimnial Discharge From Degray Lake, Arkansas, Thomas E. Moen, Michael R. Dewey
Loss Of Larval Fish By Epilimnial Discharge From Degray Lake, Arkansas, Thomas E. Moen, Michael R. Dewey
Journal of the Arkansas Academy of Science
Weekly samples of larval fish were collected from water discharged from the epilimnion of DeGray Lake into the tailwaters, for power generation, from April through August, 1976 and 1977. Peak rates of loss measured were 1.4 larvae/m³ in May, 1976 and 2.7/m³ in April, 1977. Sunfish, shad and crappie made up 97% of an estimated 83.3 million fish lost in 1976, and 98% of 122.4 million lost in 1977. The most critical period for larval fish loss extended from the last week of April to the first week of June. No definite relationships were noted between length of the power …