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Articles 38761 - 38790 of 39274
Full-Text Articles in Entire DC Network
Distribution And Movements Of Some Fishes In Bear Lake, Utah-Idaho, 1958-59, Stanley K.Y. Loo
Distribution And Movements Of Some Fishes In Bear Lake, Utah-Idaho, 1958-59, Stanley K.Y. Loo
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
During the summer of 1958, a study of the "Population Dynamics of the Small Benthic Fishes of Bear Lake, Idaho and Utah," was sponsored in part by a National Science Foundation grant to the Wildlife Management Department of Utah State University. The study was designed to extend over a period of three years.
Distribution Of Native Mammals Among The Communities Of The Mixed Prairie, Edwin Perry Martin
Distribution Of Native Mammals Among The Communities Of The Mixed Prairie, Edwin Perry Martin
Fort Hays Studies Series
From October, 1952, until August, 1958, the small mammals on a relict area near Hays, Kansas, were studied. The observations were undertaken to establish a standard to which the mammals of variously disturbed areas could be compared; also, information concerning the relations of the species of mammals to the communities of the mixed prairie was sought.
Insect Pests : Snails And Slugs, Clee Francis Howard Jenkins
Insect Pests : Snails And Slugs, Clee Francis Howard Jenkins
Journal of the Department of Agriculture, Western Australia, Series 4
WHILE snails and slugs are not insects, they have been included in this series of articles, because the damage they cause is very similar to that caused by insect pests—and furthermore, the task of testing and recommending control measures is usually left to the entomologists.
Comprehensive Survey Of Sedimentation In Lake Mead, 1948-49, W. O. Smith, C. P. Vetter, G. B. Cummings, U.S. Bureau Of Reclamation
Comprehensive Survey Of Sedimentation In Lake Mead, 1948-49, W. O. Smith, C. P. Vetter, G. B. Cummings, U.S. Bureau Of Reclamation
Publications (WR)
Reservoirs are becoming an increasingly prominent feature of the American landscape. Built for flood mitigation and to change a fluctuating river into a dependable source of water for irrigation, power, and other purposes, they are predestined, like natural lakes, to be destroyed sometime following their creation. Sedimentation sooner or later robs most lakes and reservoirs of their capacity to store water. The significance of sedimentation in the life of Lake Mead, the largest artificial reservoir in the world, was realized when the plan for the reservoir was conceived, and an aerial survey of the floor was made in 1935 before …
A Survey Of The Food Habits And Distribution Of The Fishes Of Tuckahoe Creek, Virginia, With Special Emphasis On Lepomis Macrochirus Rafinesque, David Andrew Flemer
A Survey Of The Food Habits And Distribution Of The Fishes Of Tuckahoe Creek, Virginia, With Special Emphasis On Lepomis Macrochirus Rafinesque, David Andrew Flemer
Master's Theses
An integral part of the ecological study of any organism is a good understanding of the food relationships. Basic studies of the distribution and ecology of common fresh-water fishes are necessary before a more detailed analysis can be made of the fishes in a particular area. Lagler (1956) states that food habit studies help determine population levels, rates of growth, and condition of the fishes. He also concludes that they serve as a partial basis for determining the status of various predatory and competing forms. Raney (1942) states that an intelligent fishery management program depends heavily upon information gained through …
A Distributional Check-List Of New Mexican Mammals, Arthur H. Harris
A Distributional Check-List Of New Mexican Mammals, Arthur H. Harris
Biology ETDs
Vernon Bailey's Mammals of New Mexico is not a satisfactory source of data for many studies which directly or indirectly involve distributions of mammals within New Mexico. The present work is an attempt to provide such a source--to bring together in usable form all published records of occurrence within the state for each species of mammal that is known to occur in New Mexico and also to make available such unpublished records as are present in the University of New Mexico Collection of Vertebrates. Some additional information on names, life-zone preferences, and subspecies to be found within the state has …
The Development Of The Weberian Ossicles In Pantosteus Plebius, John Lawrence Butler
The Development Of The Weberian Ossicles In Pantosteus Plebius, John Lawrence Butler
Biology ETDs
The Weberian apparatus, which was first described by Weber in 1820, is characteristic of the largest order of freshwater fishes, the Ostariophysi, a group that includes, forty-two families, among which are the minnows, suckers, siluroids, and characids. The apparatus of the family Catostomidae, the suckers, is one of the more complex because the anterior vertebrae are more highly modified than in most other groups. Although the suckers have a more complex form of apparatus, they have received comparatively little study, and this is the first developmental investigation of the Weberian ossicles of any catostomid.
The Distribution And Ecology Of The Hispid And Least Cotton Rat (Genus Sigmodon) In New Mexico, John S. Mohlhenrich
The Distribution And Ecology Of The Hispid And Least Cotton Rat (Genus Sigmodon) In New Mexico, John S. Mohlhenrich
Biology ETDs
Two species of cotton rats, Sigmodon minimus Mearns (least cotton rat) and S. hispidus Baird (hispid cotton rat), occur in the Rio Grande Valley of New Mexico. The northernmost published record-station for S. hispidus is near Scorro, Scorro County ( Bailey, 1931: 167), and that S. minimus is near Isleta, Bernalillo County (Ivey, 1947: 498 and map). When recent field work by the author revealed the presence of both species in the Rio Grande Valley north of these published record-stations the problem arose whether the range extensions were the result of a recent northward extension of the range of the …
Lethal Concentrations And Detoxification Time Of Toxaphene For Goldfish, Gambusia And Rainbow Trout, Gar W. Workman
Lethal Concentrations And Detoxification Time Of Toxaphene For Goldfish, Gambusia And Rainbow Trout, Gar W. Workman
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
In the past few years the Utah Fish and Game Department, as well as the fish and game departments of other states, has been spending fisheries money for fish eradication on both lakes and streams. The Utah Fish and Game Department recently suggested to the University that research be initiated on the subject of toxaphene as a fish poison. Consequently, a better insight into conditions that exist for a given water type could be developed.
Observations On The Biology Of Pelomyxa Palustris Greeff, Collected Under Polysaprobic Conditions, Daniel Henry Stern
Observations On The Biology Of Pelomyxa Palustris Greeff, Collected Under Polysaprobic Conditions, Daniel Henry Stern
Master's Theses
Pelomyxa palustris Greeff, the largest rhizopod of which we have knowledge, was described in 1870 by Greeff who named the organism Pelobius. According to Penard (1902) it was redescribed by Archer in 1871 and reviewed. by Greeff (1874) who then gave it the name P. palustris.
The External Morphology Of The First Zoeal Stages Of Cancer Magister (Dana), Cancer Antennarius (Stimpson), And Cancer Anthonyi (Rathbun), Robert Dotson Mir
The External Morphology Of The First Zoeal Stages Of Cancer Magister (Dana), Cancer Antennarius (Stimpson), And Cancer Anthonyi (Rathbun), Robert Dotson Mir
University of the Pacific Theses and Dissertations
The literature dealing with the larva of Pacific Coast brachyuran crabs is slight. The prominent papers, those of Aikawa (1927, 1928, 1929, 1933, 1937), deal with a variety of genera and offer information useful in determin- ing family relationships. A single paper by Hart (1935) also deal with a number of brachyuran larvae found in the Pacific Ocean. None of these papers, however, identifies to species any member of the genus Cancer, although one member, C. magister (Dana) is of considerable economic importance on the pacific coast of North America. In the fall of 1958 an investigation was under taken …
A Bio-Assay And Histochemical Study Of Antidiuretic Hormone In Normal And Adrenalectomized Rats, Jean Kautz Lauber
A Bio-Assay And Histochemical Study Of Antidiuretic Hormone In Normal And Adrenalectomized Rats, Jean Kautz Lauber
Biology ETDs
The role of neurohypophyseal hormone vasopressin in water and electrolyte regulation has been of interest to both physiologists and clinicians. This interest has been stimulated recently by identification of the chemical structure and synthesis of this polypeptide hormone by duVigneaud and his co-workers, an accomplishment which won for duVigneaud the Nobel Prize in 1955.
Bulletin No. 10: The Connecticut Arboretum, Richard H. Goodwin, William A. Niering, Fleur A. Grandjouan, Robert Fulton Logan
Bulletin No. 10: The Connecticut Arboretum, Richard H. Goodwin, William A. Niering, Fleur A. Grandjouan, Robert Fulton Logan
Bulletins
An annotated list with seasonal records and an account of the breeding bird census program. 24 pp.
Studies On The Microcrustacea Of Three Montane Lakes In Glacier National Park, Montana, Robert O. Megard
Studies On The Microcrustacea Of Three Montane Lakes In Glacier National Park, Montana, Robert O. Megard
Biology ETDs
Grinnell Lake, Lake Josephine, and Swiftcurrent Lake, at an elevation of approximately 5,000 feet in northwestern Montana, are comparable with lakes in the montane zone defined by Pennak for lakes at elevations between 8,200 feet and 10,500 feet in the Rocky Mountains of northern Colorado. Five species of Copepoda, six Cladocera, and four Ostracoda were collected in the lakes studied. The population of microcrustacea in these lakes was most dense in or slightly above the masses of rooted aquatic vegetation growing to a height of six to 10 inches above the bottom wherever the water was between three feet and …
Distribution And Variation Of Chipmunks Of The Eutamias Quadrivittatus Group In New Mexico, Eugene D. Fleharty
Distribution And Variation Of Chipmunks Of The Eutamias Quadrivittatus Group In New Mexico, Eugene D. Fleharty
Biology ETDs
The purpose of this investigation, is to attempt to elucidate the taxonomic relationships between the various populations of the Eutamias quadrivittatus group of chipmunks in New Mexico and some adjacent areas.
Retention And Excretion Of Radionuclides Of The Alkali Metals By Five Mammalian Species, Chester R. Richmond
Retention And Excretion Of Radionuclides Of The Alkali Metals By Five Mammalian Species, Chester R. Richmond
Biology ETDs
Large-volume liquid-scintillation counters were used to measure in vivo the biological half-time (BT1/2), whole-body retention, and excretion of several gamma-emitting alkali-metal radionuclides in five species of animals.
A Distributional And Taxonomic Study Of Ratibida Columnifera Var. Columnifera, Ratiba Columnifera Var. Pucherrima, And Their Hybrids In New Mexico, Walter W. Marshall
A Distributional And Taxonomic Study Of Ratibida Columnifera Var. Columnifera, Ratiba Columnifera Var. Pucherrima, And Their Hybrids In New Mexico, Walter W. Marshall
Biology ETDs
The classification and distribution of Ratibida columnifera var. columnifera Woot. and Standl. and R. columnifera var. pulcherrima (DC.) Woot. and Standl. are complex. Some floras list R. columnifera var. pulcherrima as a purple colored form or variety of the species while other authors refer to this taxon as a separate species of Ratibida. The purpose of this study is to clarify the taxonomic status of the two forms by determining and differences in morphology, distribution, taxonomy, and ecology.
An attempt has been made to determine the route by which R. columnifera columnifera and R. columnifera pulcherrima were distributed. After this …
Use Of The Antibiotics, Streptomycin And Terramycin, As Growth Stimulants For Orchid Seedlings, Margaret W. O'Neill
Use Of The Antibiotics, Streptomycin And Terramycin, As Growth Stimulants For Orchid Seedlings, Margaret W. O'Neill
Biology ETDs
Antibiotics first came to the public's attention in 1945, when penicillin and streptomycin were released by the United States government to fight human diseases. Later, other antibiotics were released and experimental work was done on control of plant and animal diseases. By 1948 plant pathologists found that certain plant diseases such as walnut blight, tomato and pepper bacterial spot, soft rot, cucumber, downy mildew, chrysanthemum bacterial wilt, and lilac bacterial blight could be controlled by antibiotics.
Effects Of Ultraviolet Radiation On Growth In Partially Shielded Timothy Roots, Mary Beth Picinich
Effects Of Ultraviolet Radiation On Growth In Partially Shielded Timothy Roots, Mary Beth Picinich
Theses & Honors Papers
No abstract provided.
The Gross And Microscopic Morphology Of The Digestive System Of The Cutlips Minnow, Exoglossum Maxillingua (Le Sueur), Ira Lederman
The Gross And Microscopic Morphology Of The Digestive System Of The Cutlips Minnow, Exoglossum Maxillingua (Le Sueur), Ira Lederman
Biology Honors Papers
This 18 page thesis describes taxonomy and anatomical characteristics of the minnow, including geographical distribution, ecology and feeding habits.
The Phytoplankton Of The Logan River, Utah, A Mountain Stream, William J. Clark
The Phytoplankton Of The Logan River, Utah, A Mountain Stream, William J. Clark
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The voluminous limnological literature contains few studies of mountain streams. Though there are a few papers on the benthic algae (see Budde 1928, Raabe 1951) only Pennak (1943) reports year-round quantitative data on the phytoplankton. Brinley (1950) gives some phytoplankton information in a summer study of streams in Rocky Mountain National Park.
An Ecological Study Of The Bottom Fauna Of Bear Lake Idaho And Utah, Earl W. Smart
An Ecological Study Of The Bottom Fauna Of Bear Lake Idaho And Utah, Earl W. Smart
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
In evaluating the potential ability of a lake to produce fish, probably no single standard is so important as an estimate of the amount of bottom fauna (Deevey and Bishop, 1942).
The study of the bottom fauna of Bear Lake was a part of the investigation of its limnology and fisheries, begun in 1952. This study was sponsored through federal monies made available through the Dingle-Johnson Act. The primary purpose of the study was to examine all the evidence in estimating the fish producing capacity of the lake. Bear Lake is the second largest fresh water lake in Utah but …
The Effect Of Adrenalectomy And Cortisone Acetate On Experimental Liver Cancer, Richard A. Heise
The Effect Of Adrenalectomy And Cortisone Acetate On Experimental Liver Cancer, Richard A. Heise
Biology ETDs
An attempt was made in this study to determine the completeness of adrenalectomy and effect in conjunction with cortisone acetate and/or desoxycorticosterone trimethylacetate (DCT) on the development of liver tumors in rats fed 3'-methyl-4-dimethylaminoazobenzene (3'-Me-DAB)
The Effects Of Adrenal Steroids On Electrolyte And Water Balance In Force-Fed Intact Rats, Emma Romero
The Effects Of Adrenal Steroids On Electrolyte And Water Balance In Force-Fed Intact Rats, Emma Romero
Biology ETDs
During the past decade a number of biological and clinical investigations have been concerned with the inhibitory effects of 11-oxy and 17-hydroxy steroids on water and sodium excretion. However, it is recognized by many investigators that such steroids may act either to inhibit or enhance water and sodium excretion, the results obtained depending upon experimental circumstances.
A Survey Of Serum Enzymes As A Possible Index Of Radiation Injury, Lora Belle Hughes
A Survey Of Serum Enzymes As A Possible Index Of Radiation Injury, Lora Belle Hughes
Biology ETDs
Early changes in the serum concentrations of glutamic-oxalacetic transaminase, glutamic-pyruvic transaminase, lactic dehydrogenase, and malic dehydrogenase were determined in young adult rats following exposures to sublethal, midlethal, and supralethal doses of X-irradiation, treatment with hepatotoxic agents or opiates, and sequential administration of both X-irradiation and the hepatotoxins. Changes in serum enzyme content were also determined in a series of 38 rhesus monkeys within 30 minutes after exposure to sublethal doses of fission neutrons.
Relatively small increases in serum enzyme concentration, detectable within 1 to 6 hours after whole body X-irradiation, were greatly exaggerated by prior treatment of the test animals …
A Comparison Of The Blood Oxygen Capacity In Semi-Terrestrial And Aquatic Frogs, Francis Burke Leftwich
A Comparison Of The Blood Oxygen Capacity In Semi-Terrestrial And Aquatic Frogs, Francis Burke Leftwich
Master's Theses
The present investigation is a comparison of the blood oxygen capacity in three species of frogs: a semi-terrestrial form R. pippins, the meadow frog; and two aquatic forms, R. clamitans, the green frog; and R. catesbeiana, the bullfrog. The habitats or these frogs are described by Wright and Wright (1949) as follows: R. pipiens inhabits swampy marsh lands, upland backwaters, overflows, and ponds in the spring. In summer it is found in swamp lands, grassy woodlands, or in cultivated hay and grain fields. In winter it hibernates in pools or marshes. It has been found as far as …
A Comparison Of The Blood Oxygen Capacity In Painted Turtles (Chrysemys Picta Schneider) And Box Turtles (Terrapene Carolina Linne), Harold J. Payne
A Comparison Of The Blood Oxygen Capacity In Painted Turtles (Chrysemys Picta Schneider) And Box Turtles (Terrapene Carolina Linne), Harold J. Payne
Master's Theses
Among factors necessary for an animal to maintain life is the presence of an oxygen carrier that will transport a sufficient quantity of oxygen necessary for respiratory metabolism. In animals whose blood contains hemoglobin, which is a pigment that loads and unloads oxygen, this carrying capacity is referred to as blood oxygen capacity. It is a measure of the amount of oxygen that will combine with whole blood when completely mixed with air. It is usually expressed in volumes per cent (ml. 02/100 ml. blood) and corrected to standard temperature and pressure.
A search of available literature revealed that there …
Studies On The Periodicity Of Certain Plankton Species Of Salem Lake, Gene A. Pratt
Studies On The Periodicity Of Certain Plankton Species Of Salem Lake, Gene A. Pratt
Theses and Dissertations
Plankton samples were taken periodically from one station in Salem Lake from the fall of 1955 through the winter of 1957. Other data including the pH, dissolved oxygen content, turbidity, brightness of day, temperature, and time of day were recorded at the time of each collection. The plankton samples were centrifuged and preserved in a 4% formalin solution. They were later examined microscopically, and density, percent density, and percent frequency calculations were made from them for ten selected species and for the five phyla which they represent.
The Effects Of Desoxycorticosterone Trimethylacetate, Desoxycorticosterone Acetate, Cortisone Acetate, And Adrenalectomy On The Liver Succinoxidase And Glutamic Dehydrogenase Activity Of Rats Fed 3'-Methyl-4-Dimethylaminoazobenzene (3'-Me-Dab), John P. Davanzo
Biology ETDs
Experimental production of liver cancer by means of azo dyes is a standardized and convenient method for study of the cancer problem. The rat is the animal of choice for this type of experimentation because this animal is readily susceptible to liver carcinogenesis upon being fed azo dyes. Mice are only partially susceptible and rabbits and guinea pigs will not develop cancer of the liver by ingestion of the azo dyes (E. C. Miller and J. A. Miller, 1947, p.473). The liver, likewise, is an appropriate organ for study. Enzymologists and cytologists today regard the liver cell as the best …
The Collembola Of New Mexico With Especial Reference To The North-Central Part Of The State, Harold George Scott
The Collembola Of New Mexico With Especial Reference To The North-Central Part Of The State, Harold George Scott
Biology ETDs
The is one of the first faunistic studies to be completed in New Mexico and one of the first comprehensive analyses of the ecological distribution of the species of Collembola in as large and varied an area as New Mexico. One hundred fifty-two Collembola species, of which 24 are described as new, are recorded from New Mexico. In addition four species, of which one is described as new, are recorded for the first time from Colorado. Prior to the present study, only four species of Collembola were recorded from New Mexico.