Digital Commons Network^™

Effect Of Fish Size On Prey Size Selection In Gambusia Affinis, Wayne A. Wurtsbaugh, Joseph J. Cech Jr., James Compton

Watershed Sciences Faculty Publications

Food size selection of the mosquitofish , Gambusia affinis affinis. was measured in aquaria using juvenile stages of the mosquito, Clllex tarsalb;, as prey. Fish size varied from recently born fry to large adult females. Food size selection was positively correlated with fish size. Mosquitofish fry (6-8 111m standard length) attacked and ate primarily first and second instar larvae. Fry attacked larger instars, but attack success on these was low (0 - 50%). Fish larger than 20 mm attached primarily pupae and third and fourth instar larva. No first instar mosquitoes were eaten. Attack success for these fish was above …

Use Of Annual Legumes As Winter Cover For No-Till Corn, Robert L. Blevins

Soil Science News and Views

Legumes in crop rotations hsve traditionally provided nitrogen for nonlegume crops since the early history of agriculture. When in association with the proper strains of Rhyzobium bacteria, legumes are capable of fixing atmospheric nitrogen, which when residues from the legumes decompose, enrich the soil content of nitrogen. Legume cover crops recycle other nutrients, thus reducing leaching losses that often occur in soils during the winter and spring seasons. In addition to these advantages, legume cover crops used with no-tillage corn provide a surface mulch which reduces soil erosion, slows evaporation of soil moisture, increases infiltration of rainfall, and increases soil …

Heavy Ion Beam Model For Radiobiology, Rose Ann Roth, Robert Katz

Robert Katz Publications

An ad hoc model of energetic heavy ion beams, including secondary and tertiary particles, has been constructed for predicting radiobiological experiments. While the beam model is relatively primitive, it yields depth-dose and depth-radiobiological calculations in good agreement with experiment upstream of the Bragg peak. Beyond the peak, the model is somewhat coarse grained and seems to underestimate low-LET fragment production. These defects can be repaired at some cost in computer time. Presently a complete set of depth-dose and radiobiological results (RBE, OER, aerobic and hypoxic survival) is obtained in 4–8 min, for a single beam, at a cost of $10. …

Bulk Magnetic Properties Of Magnetotactic Bacteria, C. R. Denham, R. P. Blakemore, Richard B. Frankel

Physics

Bulk magnetization measurements at room temperature of freeze dried magnetotactic bacterial cells, nonmagnetotactic bacterial cells, and extracted magnetosomes from magnetotactic cells are presented. The role of the magnetosome in the magnetotactic response of swimming cells is discussed.

Water Quality Aspects Of Coal Transportation By Slurry Pipeline, James W. Moore

Arkansas Water Resources Center Technical Reports

The research program was designed to accomplish three major objectives. These were tot 1) identify and characterize the water quality changes that will occur as a result of the movement of western coal by slurry pipeline; 2) determine the feasibility of utilizing poor (impaired) quality water, such as municipal and industrial effluents, as the slurry medium, and: 3) determine the treatment measures applicable for restoring the slurry wastewater quality to acceptable levels, if required. The focus of the research program was generic rather than specific for any particular pipeline. Consequently, the emphasis was on establishing general ranges of data rather …

Technical And Legal Considerations Immanent In The Disposal Of Commercial Nuclear Waste, Margaret D. Davidson

Marine Affairs Theses and Major Papers

There is, currently, a flurry of activity as the present Administration, along with the United States Department of Energy and the United States Nuclear Regulatory Commission, struggles to develop a comprehensive national program for the management and disposal of radioactive wastes. The first section of the paper deals with some of the inherent technical issues. This includes a review of the origin of nuclear wastes; the hazards of the wastes, including impacts upon the biological environment; and the extent of the state of the art for disposing of such wastes. The second section is an attempt to review the scope …

Volume 4, Number 8 (August 1980), The Solar Ocean Energy Liaison

The OTEC Liaison

No abstract provided.

Numerical Studies Of Double-Layer Circularization And Gastrulation, Donald Greenspan

Mathematics Technical Papers - Archive

In this paper, certain types of biological cell rearrangements are modeled from a computer point of view. All forces are of a local nature and are patterned on classical atomic and molecular interactions. It is first shown how to induce a double-layered flat tissue to fold into a double-layered circular tissue. Then, it is shown how to induce a section of the circular tissue to pull inward, or gastrulate.

The Effect Of Natural Measures To Aid In Sleep As Compared With The Use Of Flurazepam 30 Milligrams As Seen In The Hospitalized Male Patient, Myra Ladd Thompson

Loma Linda University Electronic Theses, Dissertations & Projects

Sleep is necessary for physical and psychological restoration of the body. Studies indicate that tissue repair is augmented during sleep, showing that rates of protein synthesis and of mitotic division are higher at times of rest and sleep. Studies evaluating sleep-deprived subjects reveal that after loss of normal sleep, some types of memory and learning processes are impaired. These subjects generally become anxious and irritable, especially after loss of dreaming sleep.

Sleeping medications have been implicated by observers and researchers to be a cause of altered sleep patterns. These medications not only disrupt normal sleep cycles, but their continued use …

Variations In The Depositional Environment Of The Lower Cincinnatian Kope Formation, Thomas K. Mahan

Masters Theses

In northern Kentucky, the Upper Ordovician (Lower Cincinnatian) Kope Formation outcrops as a series of interbedded, laterally discontinuous limestone lenses and beds enclosed in a silty shale unit. Six stratigraphic sections within a 20-mile radius were sampled and measured and two of these were described in detail to characterize the variations in the environmental setting wherein the Kope Formation was deposited.

The shale lithology is homogeneous throughout this formation whereas the bioclastic limestones vary widely in faunal composition, texture, cross-sectional shape, and thickness. Apparently, the depositional style for the fine-grained, terrigenous sediment remained almost constant through Early Cincinnatian time, whereas …

The Surface Mining Control And Reclamation Act Of 1977, Hamlet J. Barry, Iii

Federal Lands, Laws and Policies and the Development of Natural Resources: A Short Course (Summer Conference, July 28-August 1)

48 pages.

Includes footnotes (pages 44 to 47).

Water Rights For Western Mineral Development On Public Lands, A. Dan Tarlock

Federal Lands, Laws and Policies and the Development of Natural Resources: A Short Course (Summer Conference, July 28-August 1)

13 pages.

The Resource Conservation And Recovery Act And Mineral Development, Robert E. Hamel

Federal Lands, Laws and Policies and the Development of Natural Resources: A Short Course (Summer Conference, July 28-August 1)

30 pages.

South-Seeking Magnetotactic Bacteria In The Southern Hemisphere, R. P. Blakemore, Richard B. Frankel, Ad. J. Kalmijn

Physics

Several species of aquatic bacteria which orient in the Earth's magnetic field and swim along magnetic field lines in a preferred direction (magnetotaxis) have been observed in marine and freshwater sediments of the Northern Hemisphere^1,2. Their orientation is due to one or more intracytoplasmic chains of single-domain magnetite particles³. These linearly arranged particles impart a net magnetic dipole moment to the bacterium, parallel to the axis of motility. Northern Hemisphere magnetotactic bacteria with unidirectional motility swim consistently in the direction of the magnetic field, that is, to the geomagnetic North^1,2,4. This implies that their …

State Of The Fisheries Report 1979, Department Of Fisheries And Wildlife, Western Australia

Status Reports of the Fisheries and Aquatic Resources

Western Australia has maintained its position as the top fishing State. The catch in Western Australia of fish, crustaceans and molluscs in 1978-79 was worth $91 million to the fishermen, which is 33 per cent of the total value for Australia.

Volume 4, Number 7 (July 1980), The Solar Ocean Energy Liaison

The OTEC Liaison

No abstract provided.

Environmental Quality 1979 - Hillsborough County Florida, Hillsborough County Environmental Protection Commission

Reports

During 1979 at least 65,948 air quality samples were collected and analyzed from 146 sampling stations throughout Hillsborough County. Enclosed maps attempt to depict the cleaner and dirtier areas of Hillsborough County, while data summaries show where and how often air quality standards were exceeded during 1979.

During 1979, 54 salt water sampling stations were monitored for 40 parameters resulting in 25,151 samples; while 24 fresh water stations were monitored for 53 parameters resulting in 7,588 samples. Sampling averages for each parameter were ranked from lowest to highest (1-54), with the similar rankings assigned to tied average parameters. Lowest ranking …

The Probe, Issue 7 - July 1980

The Probe: Newsletter of the National Animal Damage Control Association

Contents:
Bureau of Land Management (BLM) land in Alaska
burro removal frormBandelier National Monument (New Mexico)and Grand Canyon National Park (Arizona)
toxicants to alleviate blackbird problems in Kentucky
DMCT, a presumably nontoxic fluorescent tooth and bone marking agent
PYTHONS TO GET GRIP ON ADC PROBLEM
lion killed 16 registered angora billies
MINORS MAKE MAJOR DECISION
Exotic parakeets
VERTEBRATE PEST CONFERENCE PROCEEDINGS
MEETINGS OF INTEREST
NEW ADC PATCH NEEDED?
William D. Fitzwater

The Effects Of Salinity On The Growth And Survival Of The Crayfish, Procambarus Actus Actus (Girard), Emily Deaver

OES Theses and Dissertations

The white river crayfish, Procambarus acutus acutus was tested in low salinity water for growth and survival. Thirty animals were placed in each test pool at O, 4 and 8 ppt and grown for 75 days. Growth was defined as increase in carapace length and wet weight. Crayfish grew at a faster rate and had the lowest mortality at 4 ppt. Water hardness, defined as the total concentration of calcium and magnesium expressed as the calcium carbonate equivalent, ranged from 35 mg/1 to 195 mg/1. Pools of crayfish tested at concentrations of approximately 100 mg/1 total hardness exhibited the best …

The Effects Of Elevated Calcium Chloride And Magnesium Chloride Levels On Larval Growth And Survival Of Macrobrachium Rosenbergii (De Man) (Decapoda Palaemonidae) Reared In The Laboratory, James Thomas Michaels Ii

OES Theses and Dissertations

The effects of elevated CaCl₂ , MgCl₂ , combination CaCl₂ and MgCl₂ concentrations and their associated ionic strengths on larval growth and survival of the freshwater prawn, Macrobrachium rosenbergii were investigated in the laboratory. Larvae were reared in diluted seawater of 15 parts per thousand salinity with elevated calcium concentrations of 330 parts per million and elevated magnesium concentrations of 1275 parts per million. Control larvae were also reared with elevated NaCl concentrations to duplicate the ionic strength increases of the combination CaCl₂ - MgCl₂ test solution which had the highest ionic strength. A …

A Comparative Study On The Frequency Of Respiratory, Gastrointestinal, And Allergic Disorders Between Bottle-Fed And Breast-Fed Infants From Birth To Twelve Weeks Of Age, Sylvia C. Souza

Loma Linda University Electronic Theses, Dissertations & Projects

Questions concerning the advantages of breast-feeding have been debated since the introduction of commercially-prepared formula about 50 years ago. Some recognized benefits of breast milk include less respiratory as well as other Infections, less allergy in infancy and later life, and a lower morbidity rate in less-developed countries. From 1955 to 1971 in the United States there was a decline in the incidence of breast feeding related to several factors which included the introduction of formula, mothers returning to the work force, and strict maternity units' rules and routines. Since 1971 to the present there has been a resurgence in …

Bulletin No. 25: Salt Marsh Plants Of Connecticut, William A. Niering, Scott Warren

Bulletins

32 pp. 1980. Illustrated guide to 22 plants which grow in our tidal wetlands.

The Prairie Naturalist Volume 12, Number 2. June 1980

The Prairie Naturalist

COMPOSITION OF BEAVER CACHES ON THE TONGUE RIVER IN MONTANA ▪ J. E. Swenson and S. J. Knapp

GRAY PARTRIDGE WINTER MOVEMENTS AND HABITAT USE IN NORTH DAKOTA ▪ J. W. Schulz

ANNOTATED CHECKLIST OF MAMMALS OF NEBRASKA ▪ J. K. Jones, Jr. and J. R. Choate

OBSERVATIONS OF SEVERAL ARCTIC GULLS IN NORTH DAKOTA ▪ C. A. Faanes and T. A. Gatz

WINTER FOOD HABITS OF NEBRASKA BOBCATS (Felis rufus) C. J Mahan

NOTE

The Meadow Jumping Mouse in Southeastern Montana ▪ W. L. Matthews

Relationship Of Tecate Cypress Distribution To Soil Types, David E. Stottlemyer

Loma Linda University Electronic Theses, Dissertations & Projects

The Tecate Cypress (Cupressus forbesii Jeps.) is a gymnosperm tree of limited distribution. To determine if soil is an influencing factor in its distribution, the soil characteristics of a Tecate Cypress grove in the Santa Ana Mountains of Orange County, California, were compared with soils from neighboring communities and other Tecate Cypress groves. Soil samples were analyzed for texture, saturation percent, pH, and electrical conductivity. Tests were also run for nutrients such as nitrogen, phosphorus, potassium, calcium, magnesium, iron, manganese, copper and zinc.

Results seem to indicate that the Tecate Cypress soils are: 1) significantly more acidic than the soils …

Evaluation Of New Attachment Following Full Thickness Flap Procedure In Humans, Shaunda S. Steiner

Loma Linda University Electronic Theses, Dissertations & Projects

A study was made to investigate the biological possibility of obtaining new connective tissue attachment to periodontally diseased root surfaces following full thickness flap procedure. Reconstructive surgery was performed on seven teeth involved in advanced chronic periodontal disease. A mucoperiosteal flap was raised and the apical extent of existing subgingival calculus was marked with a notch made into the root just apical to the calculus. Following thorough instrumentation, sterile saline was applied to the root surface for five minutes, and the flap was repositioned and sutured. Four months later the teeth with attached periodontal tissues were removed and processed for …

Influence Of Las Vegas Wash Density Current On Nutrient Availability And Phytoplankton Growth In Lake Mead, John R. Baker, Larry J. Paulson

Publications (WR)

Density currents are commonly formed in reservoirs because of temperature or salinity induced density differences between inflowing and receiving waters. Anderson and Pritchard (1951) were among the first to demonstrate this in their investigations of density currents in Lake Mead. They found that the Colorado River formed an underflow in Lake Mead during the winter, an overflow in the spring and an interflow in the summer and fall. Wunderlich and Elder (1973) have since described the hydromechanics of these types of flow patterns, and density currents have been reported for several other large reservoirs (Carmack et al. 1979, Johnson and …

Nutrient Interactions Among Reservoirs On The Colorado River, Larry J. Paulson, John R. Baker

Publications (WR)

Interactions among physical, chemical and biological processes in reservoirs can significantly alter the characteristics of the discharge (Neel 1963, Wright 1967, Hannan 1979) that, in turn, can influence the ecology of the river downstream .(Ward and Stanford 1979). Investigations of the Colorado River, system reveal that reservoir-induced changes in the river can also affect downstream reservoirs. The formation of Lake Powell, in 1963 was accompanied by reductions in suspended sediment and nutrient loading and changes in the seasonal temperature and discharge cycles of the Colorado River. In this paper, we evaluate how these changes have influenced the nutrient and trophic …

Volume 4, Number 5 (May 1980), The Solar Ocean Energy Liaison

The OTEC Liaison

No abstract provided.

A New Mathematical Approach To Biological Cell Rearrangement With Applications To The Inversion Of Volvox, Donald Greenspan

Mathematics Technical Papers - Archive

This paper develops a new method for modeling cell rearrangement in both two and three dimensions. The method uses classical molecular type forces and is computer oriented, recursively explicit, and economical. As yet, the approach is simplistic in that switching processes are not related deterministically to chemical, neurological, or genetic precursors. Illustrative computer examples of the inversion of volvox are described and discussed.

The Probe, Issue 6 - May 1980

The Probe: Newsletter of the National Animal Damage Control Association

Contents:
ANIMALS GOT RIGHTS AGAIN
ENVIRONMENTAL ACTIVISTS CAPTURE WASHINGTON
DEDICATION: Conridge Thomas
anti-control element
good trapping tip for raccoons
Mail Call
SONITIZING
REGION II - C. R. "Pink" Madsen
REGION I - Homer S. Ford and Willard E. Nelson
REGION IV - John C. Jones