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Zoology

University of Arkansas, Fayetteville

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Articles 451 - 480 of 510

Full-Text Articles in Life Sciences

Distributional Records Of Amphibians And Reptiles From Coastal Plain Of Arkansas, Edmond J. Bacon Jr., Zane M. Anderson Jan 1976

Distributional Records Of Amphibians And Reptiles From Coastal Plain Of Arkansas, Edmond J. Bacon Jr., Zane M. Anderson

Journal of the Arkansas Academy of Science

Distribution of amphibians and reptiles in the West Gulf Coastal Plain and Mississippi Alluvial Plain is not well known because extensive collecting has not been done in these areas and data in museums have not been published. New distributional records for three salamanders (Desmognathus fuscus brimleyorum, Manculus quadridigitarus, Plethodon glutinosus glutinosus) , two anurans (Rana areolata circulosa, Scaphiopus holbrooki holbrooki), and one snake (Lampropeltis doliata amaura) are presented. Additional collecting will be necessary to determine the exact range and status of the secretive species.

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Scanning Electron Microscopy Of The Rainbow Trout (Salmo Gairdneri Richardson) Spermatozoon, James H. Fribourgh, Bernard L. Soloff Jan 1976

Scanning Electron Microscopy Of The Rainbow Trout (Salmo Gairdneri Richardson) Spermatozoon, James H. Fribourgh, Bernard L. Soloff

Journal of the Arkansas Academy of Science

The scanning electron microscope was used to determine the morphology of the rainbow trout (Salmo gairdneri Richardson) spermatozoon. The spermatozoon is approximately 32 μm long and consists of a head, mitochondrial collar, and flagellum. The head is elongated and somewhat flattened. It has an antero posterior length of 3.1 μm and a maximum diameter of 1.6 to 2.2 μm. Mean antero-posterior length of the mitochondrial collar is 0.8 μm The collar encircles the flagellum but is separated from it. The flagellum ranges in length from 26 to31 μm and is divided into a principal piece and end piece. Cytoplasmic vesicles …

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Cave Fauna Of Arkansas: Selected Invertebrate Taxa, V. Rick Mcdaniel, Kenneth L. Smith Jan 1976

Cave Fauna Of Arkansas: Selected Invertebrate Taxa, V. Rick Mcdaniel, Kenneth L. Smith

Journal of the Arkansas Academy of Science

This report is the first in a series of reports describing the fauna of Arkansas caves. Included are notes accumulated during the past four years on nematomorphs, amphipods, isopods, diplopods, decapods, and a variety of insect taxa. In addition to indicated records of distribution, the ecological status of each species (as a cavernicole) is described as troglobitic, troglophilic, trogloxenic, or accidental. Several of the included species are reported for the first time from Arkansas.

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Hormone Receptor Site Maturation In The Secondary Sex Organs Of Immature Male And Female Rats, K. J. Thomas Jan 1976

Hormone Receptor Site Maturation In The Secondary Sex Organs Of Immature Male And Female Rats, K. J. Thomas

Journal of the Arkansas Academy of Science

The effect of a combined dose of pregnant mares' serum (PAAS) and human chor ionic gonadotropin (HCG) on male and female rats 2-25 days old was studied. Groups of animals were given injections for three days, then sacrificed on the fourth day. All injections were begun on the 2nd, 7th, 12th, 17th, and 22nd day of life. Ovaries, uteri, seminal vesicles (SV), and ventral prostate (VP) were removed, dissected free of fat, and weighed. Because uterine weight increased earlier than either SV or VP weight, the ability of the uterus to respond to exogenous estradiol and of the SV and …

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Continuation Of Mourning Dove Studies In Clark County, Arkansas, With Emphasis On Cyclical Behavioral Patterns, Thurman Booth, Fred L. Burnside Jr., Jan Burnside, Peggy Rae Dorris Jan 1976

Continuation Of Mourning Dove Studies In Clark County, Arkansas, With Emphasis On Cyclical Behavioral Patterns, Thurman Booth, Fred L. Burnside Jr., Jan Burnside, Peggy Rae Dorris

Journal of the Arkansas Academy of Science

In conjunction with the U.S. Department of Interior, Fish and Wildlife Service, the Henderson State University Biology Department has continued a study of mourning doves in Clark County, Arkansas, with emphasis on cyclical behavioral patterns. Three hundred forty-three mourning doves were baited, trapped, and banded to obtain information concerning age, sex, populations, retraps, abnormalities, migrations, trap injuries, cyclical behavioral patterns, and other factors.

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Preliminary Dove Banding Studies In Clark County, Arkansas, Thurman Booth, Peggy Rae Dorris, William N. Hunter, Benny Mays Jan 1975

Preliminary Dove Banding Studies In Clark County, Arkansas, Thurman Booth, Peggy Rae Dorris, William N. Hunter, Benny Mays

Journal of the Arkansas Academy of Science

In conjunction with the U.S. Department of Interior Fish and Wildlife Service, Henderson State University Biology Department made a preliminary study of mourning doves in Clark County, Arkansas, during June, July and August 1974. Three hundred seventy-one mourning doves were baited, trapped and banded to obtain information concerning age, sex, populations, retraps, deformities, effects on other animals, migrations and other behaviors.

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Ichthyofaunal Survey Of The Current River Within Arkansas, Joe F. Green, John K. Beadles Jan 1974

Ichthyofaunal Survey Of The Current River Within Arkansas, Joe F. Green, John K. Beadles

Journal of the Arkansas Academy of Science

Current River is a clear predominantly spring-fed stream draining the southeastern face of the Ozark escarpment. Beginning at Montauk Springs, Dent County, Missouri, it meanders southward for 180 km to the Arkansas-Missouri state line. The study area containing 14 sampling stations was that part of Current River lying within the boundaries of Arkansas to its confluence with Black River. The collected fishes could be referred to as those common to a wide-ranging faunal group, the Ozark, and the lowland faunal group. Those of the Ozark group were restricted in their range by topography and the river's confluence with Little Black …

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Microscopic Anatomy Of The Digestive Tract Of The White Amur, Ctenopharyngodon Idella Val., Leland F. Morgans, Gary A. Heidt Jan 1974

Microscopic Anatomy Of The Digestive Tract Of The White Amur, Ctenopharyngodon Idella Val., Leland F. Morgans, Gary A. Heidt

Journal of the Arkansas Academy of Science

The digestive tract of the amur is like that of other vertebrates in that it is composed of four layers: mucosa, submucosa, muscularis externa and serosa. The mucosa is composed of pseudostratified epithelial tissue and an extremely thin lamina propria and muscularis mucosa. Goblet cells are found throughout this layer of the gut, being most numerous In the posterior part. The submucosa is composed of dense irregular connective tissue. The muscularis externa consists of an inner and an outer layer of smooth muscle fibers. However, in the esophageal region this layer also contains some striated muscle. The serosa is composed …

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Light And Electron Microscope Study Of The Mitotic Apparatus Of The Ring-Legged Earwig, Euborellia Annulipes (Lucas), Vonnie R. Prentice, William L. Evans Jan 1974

Light And Electron Microscope Study Of The Mitotic Apparatus Of The Ring-Legged Earwig, Euborellia Annulipes (Lucas), Vonnie R. Prentice, William L. Evans

Journal of the Arkansas Academy of Science

The mitotic apparatus in dividing cells of the ring-legged earwig is composed of the cell center or pole, chromosomal fibers, continuous fibers, and chromosomal and background structure. Parts from cellular elements such as Golgi membranes, endoplasmic reticulum, and nuclear envelope as well as whole mitochondria associate with the spindle microtubules to produce the diffraction pattern of the spindle fibers as seen with the light microscope. The microtubules of the chromosomal fibers attach independently and demonstrate the diffuse nature of the centromere or polycentric condition of the chromosomes.

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Effects Of Mississippi Delta Flooding On Spider Populations, Peggy Rae Dorris Jan 1974

Effects Of Mississippi Delta Flooding On Spider Populations, Peggy Rae Dorris

Journal of the Arkansas Academy of Science

The Mississippi Delta flooded in the spring of 1973. Spider collections made in a Delta area of Mississippi in 1972 are compared with those made in 1973 during the flood and after it subsided. Because many egg cases and immature and mature spiders were destroyed by the flood, the spider population was diminished.

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Taxonomic Relationship Of Hybrid Peafowl-Guineafowl: Preliminary Study Of Serum Proteins, Earl L. Hanebrink, Charles Gruver, Richard Van Grouw Jan 1973

Taxonomic Relationship Of Hybrid Peafowl-Guineafowl: Preliminary Study Of Serum Proteins, Earl L. Hanebrink, Charles Gruver, Richard Van Grouw

Journal of the Arkansas Academy of Science

Disc electrophoresis of serum proteins was conducted for the peafowl, guineafowl, peafowl-guineafowl hybrid, and domesticated chicken. The four birds analyzed are of the same order but family status has been questioned. Serum protein patterns for all birds were similar in the anodic regions but different in the cathodic regions. The peafowl-guineafowl hybrid showed a pattern more similar to that of the peafowl than to that of the guineafowl. In morphologic characters the hybrid also was more similar to the peahen than to the guineafowl. In the cathodic region the serum protein pattern of the guineafowl was more unlike the patterns …

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Status Of The Mountain Lion In Arkansas, John A. Sealander, Philip S. Gipson Jan 1973

Status Of The Mountain Lion In Arkansas, John A. Sealander, Philip S. Gipson

Journal of the Arkansas Academy of Science

Two authenticated kill records of the mountain lion, Felis concolor, in Arkansas are reported as well as numerous reliable sight records spanning an approximately 30-year period. Distribution of sightings in the state is discussed in relation to an expanding deer population. The cougar probably never was exterminated in Arkansas but it still may be considered endangered.

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Anatomical And Behavioral Aspects Of Killing And Feeding By The Least Weasel, Mustela Nivalis L., Gary A. Heidt Jan 1972

Anatomical And Behavioral Aspects Of Killing And Feeding By The Least Weasel, Mustela Nivalis L., Gary A. Heidt

Journal of the Arkansas Academy of Science

The least weasel (Mustela nivalis) is a remarkably well adapted predator of mice and other small animals. Each kill is rather stereotyped, in that the weasel grabs the prey by the nape of the neck and bites through the base of the skull and/or throat, using its lithe body to "wrap up" and hold the prey. The least weasel will kill mice successively until it is too exhausted physically to kill more. Mice are always eaten from the head posteriorly until completely consumed.

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Herpetofauna Of Sylamore Ranger District, Ozark National Forest, Arkansas: Preliminary Report, John P. Schuier, James W. Dickson, Michael J. Harvey Jan 1972

Herpetofauna Of Sylamore Ranger District, Ozark National Forest, Arkansas: Preliminary Report, John P. Schuier, James W. Dickson, Michael J. Harvey

Journal of the Arkansas Academy of Science

A survey of the amphibians and reptiles of the Sylamore Ranger District, Ozark National Forest, Arkansas, was conducted from May 1969 through May 1972. The district is composed of 170,000 acres and includes parts of Stone, Baxter, Marion, and Searcy Counties. A total of 533 specimens was collected during the study. An additional 72 specimens in the collections of Memphis State University and Arkansas State University were examined. Forty-nine species were recorded from the study area. These consisted of 8 salamanders, 12 frogs and toads, 4 turtles, 6 lizards, and 19 snakes. Two species collected during the study, Scaphiopus holbrooki …

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Trypanosoma Lewisi Kent (Protozoa: Mastigophora): Ultrastructure And Theory Of Locomotion, Christine Wen Chan, David A. Becker Jan 1972

Trypanosoma Lewisi Kent (Protozoa: Mastigophora): Ultrastructure And Theory Of Locomotion, Christine Wen Chan, David A. Becker

Journal of the Arkansas Academy of Science

Trypanosoma lewisi Kent is a nonpathogenic hemoflagellate of rats (Rattus spp.). After briefly reviewing its infrastructure, the writers postulate that inside the flagellum the change in shape of kinetosomal plate 1 may cause one of the central microtubules and the helical-like structure to contribute to flagellar movement. The energy to run this system may be transferred from the kinetoplast with its associated mitochondrion.

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Histological Study Of Liver On Channel Catfish, Ictalurus Punctatus, Leland F. Morgans Jan 1972

Histological Study Of Liver On Channel Catfish, Ictalurus Punctatus, Leland F. Morgans

Journal of the Arkansas Academy of Science

Histologically the liver of the channel catfish, Ictalurus punctatus, was found to consist of many lobules. Though not surrounded by a connective tissue sheath as they are in some animals, the lobules were discernable because all the hepatic cells in a particular area radiated from a central vein. Portal triads were scattered throughout the liver. The lobule tissue consisted of radiating cords of cells alternating with sinusoids. Glycogen was condensed into large vacuoles within these cells. Pancreatic tissue was found in the liver, always surrounding a capillary or venule. Morphologically the pancreatic cells were exocrine. Functionally, however, they may be …

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Checklist Of Spiders Collected In Mississippi Compared With Preliminary Study Of Arkansas Spiders, Peggy Rae Dorris Jan 1972

Checklist Of Spiders Collected In Mississippi Compared With Preliminary Study Of Arkansas Spiders, Peggy Rae Dorris

Journal of the Arkansas Academy of Science

This paper presents a comparative list of spiders collected in the 82 counties of Mississippi and in a random sampling of the spiders of Arkansas. The Mississippi list includes 26 families with 263 species, whereas the Arkansas collection includes 24 families with 206 species. Various methods of collecting were used in an effort to sample all populations and to contribute to knowledge of the taxonomy both Mississippi and Arkansas.

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Impoundment Effects On Water Quality As Reflected In Parasitism Of Reservoir Basses, David A. Becker Jan 1971

Impoundment Effects On Water Quality As Reflected In Parasitism Of Reservoir Basses, David A. Becker

Technical Reports

Our aquatic environments are rapidly becoming useless as natural resources through pollution from various sources. It is therefore necessary for us to further understand the various means which relate to this process. The interrelationships between the physico-chemical and biological water qualities undergo marked changes during the ageing of a reservoir. Eutrophication of these impoundments render them rela-tively useless as natural resources. It thus becomes apparent that we must gain further knowledge of these processes if we are to devise methods for proper reservoir management.

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Phosphorescent Animal Forms Of Arkansas, Peggy Rae Dorris Jan 1971

Phosphorescent Animal Forms Of Arkansas, Peggy Rae Dorris

Journal of the Arkansas Academy of Science

Two phosphorescent animal forms, Euryurus sp. and Centruroides vittatus, were collected with a black light in an attempt to collect phosphorescent spiders. Both the millipede and the scorpion were easily observed by the bright phosphorescent yellow color which glowed in the presence of the black light

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Age And Growth Of The Blue Catfish, Ictalurus Furcatus, In The Arkansas River, D. Leroy Gray Jan 1970

Age And Growth Of The Blue Catfish, Ictalurus Furcatus, In The Arkansas River, D. Leroy Gray

Journal of the Arkansas Academy of Science

No abstract provided.

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Preliminary Study Of Zooplankton Over A Six Month Period On Lake Dardanelle, Tom N. Palko Jan 1970

Preliminary Study Of Zooplankton Over A Six Month Period On Lake Dardanelle, Tom N. Palko

Journal of the Arkansas Academy of Science

No abstract provided.

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Observation On The Impact Of Certain Insecticides On Spider Populations In A Cotton Field, Peggy Rae Dorris Jan 1970

Observation On The Impact Of Certain Insecticides On Spider Populations In A Cotton Field, Peggy Rae Dorris

Journal of the Arkansas Academy of Science

No abstract provided.

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Road-Kill Census Of Mammals In Northeastern Arkansas, J.W. Ed Wortham, Earl L. Hanebrink Jan 1970

Road-Kill Census Of Mammals In Northeastern Arkansas, J.W. Ed Wortham, Earl L. Hanebrink

Journal of the Arkansas Academy of Science

No abstract provided.

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Hemolysis By Crotalus Horridus Atricaudatus Venom, Franklin E. Byrd, Bob D. Johnson Jan 1969

Hemolysis By Crotalus Horridus Atricaudatus Venom, Franklin E. Byrd, Bob D. Johnson

Journal of the Arkansas Academy of Science

No abstract provided.

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Spiders Collected From Mud-Dauber Nests In Clark County, Arkansas, Peggy Rae Dorris Jan 1969

Spiders Collected From Mud-Dauber Nests In Clark County, Arkansas, Peggy Rae Dorris

Journal of the Arkansas Academy of Science

No abstract provided.

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Survey Of The Helminth Parasites Of Selected Game Fishes Of Lake Fort Smith, Arkansas, David A. Becker, Walter C. Houghton Jan 1969

Survey Of The Helminth Parasites Of Selected Game Fishes Of Lake Fort Smith, Arkansas, David A. Becker, Walter C. Houghton

Journal of the Arkansas Academy of Science

No abstract provided.

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Cattle Poisoning Related To The Blue-Green Alga Polycystis Aeruginosa Kutz, Richard L. Meyer, John F. Brown, Robert A. Gearheart Jan 1969

Cattle Poisoning Related To The Blue-Green Alga Polycystis Aeruginosa Kutz, Richard L. Meyer, John F. Brown, Robert A. Gearheart

Journal of the Arkansas Academy of Science

No abstract provided.

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Addition To The List Of Spiders Collected In Clark County, Arkansas, Peggy Rae Dorris Jan 1969

Addition To The List Of Spiders Collected In Clark County, Arkansas, Peggy Rae Dorris

Journal of the Arkansas Academy of Science

No abstract provided.

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Satyrs And Wood Nymphs Of Arkansas, E. Phil Rouse Jan 1968

Satyrs And Wood Nymphs Of Arkansas, E. Phil Rouse

Journal of the Arkansas Academy of Science

No abstract provided.

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Preliminary Study Of The Spiders Of Clark County Arkansas Compared With A Five Year Study Of Mississippi Spiders, Peggy Rae Dorris Jan 1968

Preliminary Study Of The Spiders Of Clark County Arkansas Compared With A Five Year Study Of Mississippi Spiders, Peggy Rae Dorris

Journal of the Arkansas Academy of Science

No abstract provided.

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