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Articles 37771 - 37800 of 39785
Full-Text Articles in Physical Sciences and Mathematics
Immediate Effects Of A Storm On Coastal Infauna, Fred C. Dobbs, Joseph M. Vozarik
Immediate Effects Of A Storm On Coastal Infauna, Fred C. Dobbs, Joseph M. Vozarik
OES Faculty Publications
Effects of storms on benthic infaunal communities have thus far been inferred rather than documented; especially lacking are studies examining immediate effects. To this end, the water column and 2 subtidal benthic sites were sampled before and after Storm David in September 1979. There were large post-storm increases in the numbers of infaunal species and individuals in the water column, presumably due to turbulent benthic boundary conditions. At the benthic stations, there were no pre vs. post-storm differences in the density of infauna; however, the number of species decreased at 1 station. There were storm-associated changes in the rank order …
Monitoring Defecation Activity Of Infaunal Deposit Feeders, Fred C. Dobbs
Monitoring Defecation Activity Of Infaunal Deposit Feeders, Fred C. Dobbs
OES Faculty Publications
An inexpensive, reliable thermistor device capable of monitoring infaunal foraging activity was built and used in the laboratory to examine effects of temperature on sediment reworking by the maldanld polychaete Clymenella torquata. The worm defecated at least once per hour 55.0 % (12.0 "C) to 88.2 % (5.5 "C) of the time. Defecation rate was linearly and positively related to temperature. Estimated volume of sediment ejected per defecation (0.015 ml) did not change with temperature. Results are compared with previous reworking studies of C. torquata.
Climate Scale Environmental Factors Affecting Year-Class Fluctuations Of Atlantic Croaker (Micropogonias Undulatus) In The Chesapeake Bay (Maryland, Virginia), Brenda L. Norcross
Climate Scale Environmental Factors Affecting Year-Class Fluctuations Of Atlantic Croaker (Micropogonias Undulatus) In The Chesapeake Bay (Maryland, Virginia), Brenda L. Norcross
Dissertations, Theses, and Masters Projects
A conceptual life history of the Atlantic croaker (Micropogonias undulatus) identifies the effects of the environment on juvenile recruitment. In a multi-disciplinary approach to modelling, the major effects are investigated, quantified and presented in a flow chart. The model is divided into three sub models, each representing a major component which affects juvenile recruitment. North/south spawning location in the Mid-Atlantic Bight is affected by the bottom water temperature as influenced by the cessation of the summer winds in relation to timing of croaker migration. The pelagic phase is the most critical time in the life history of a larval croaker …
An Environmental Model Predicting The Relative Recruitment Success Of Blue Crab, Callinectes Sapidus (Rathbun), In Chesapeake Bay, Virginia, Andrew Jackson Applegate
An Environmental Model Predicting The Relative Recruitment Success Of Blue Crab, Callinectes Sapidus (Rathbun), In Chesapeake Bay, Virginia, Andrew Jackson Applegate
Dissertations, Theses, and Masters Projects
No abstract provided.
Age, Growth And Reproduction Of American Eels, Anguilla Rostrata, (Lesueur), From The Chesapeake Bay Area, Marion Yvonne Hedgepeth
Age, Growth And Reproduction Of American Eels, Anguilla Rostrata, (Lesueur), From The Chesapeake Bay Area, Marion Yvonne Hedgepeth
Dissertations, Theses, and Masters Projects
No abstract provided.
Energy Utilization In Bay Anchovy And Black Sea Bass Eggs And Larvae Contrasting Ecological Roles, John Wotring Tucker Jr
Energy Utilization In Bay Anchovy And Black Sea Bass Eggs And Larvae Contrasting Ecological Roles, John Wotring Tucker Jr
Dissertations, Theses, and Masters Projects
The objective of this study was a comparison of developmental changes and energy utilization in eggs, unfed larvae, and fed larvae of two marine fish species that both have pelagic early stages, but differ in phylogeny and early life ecology. The bay anchovy (Anchoa mitchilli), a clupeiform, spawns in estuaries and shallow coastal waters. The black sea bass (Centropristis striata striata), a perciform, spawns offshore at 15-50 m depths. Densities of zooplankton eaten by first-feeding fish larvae are normally higher in coastal waters than offshore. An important determinant of survival of larval fishes is their ability to fulfill nutritional requirements …
The Peregrine Falcon In Virginia: Survey Of Historic Eyries And Reintroduction Effort, Johannes Kurt Gabler
The Peregrine Falcon In Virginia: Survey Of Historic Eyries And Reintroduction Effort, Johannes Kurt Gabler
Dissertations, Theses, and Masters Projects
No abstract provided.
Ua35/11 Student Honors Research Bulletin, Wku Honors Program
Ua35/11 Student Honors Research Bulletin, Wku Honors Program
WKU Administration Documents
The WKU Student Honors Research Bulletin is dedicated to scholarly involvement and student research. These papers are representative of work done by students from throughout the university.
- Albin, Bettye. John Dryden's Criticism: The Neglected Link
- Allen, Christopher. Martial Reflections: Ancient Cultures and Their War-Gods
- Case, Laura. Climatic Preference
- Deller, Kathy. Regression Analysis: The Effects of Advertising, Price, Income and Import Sales on American-Made Auto Sales
- Downing, Elizabeth. Dorothy Leigh Sayers: Detective of Literary Theory in The Mind of the Maker
- Elder, Janice. A Retrospective Study on Discharge Planning and Primiparas at Breckinridge Memorial
- Flora, Joan. Narcissism and the Need for …
Oyster Spatfall In Virginia Rivers: 1982 Annual Summary, Dexter S. Haven, James Whitcomb
Oyster Spatfall In Virginia Rivers: 1982 Annual Summary, Dexter S. Haven, James Whitcomb
Reports
The Virginia Institute of Marine Science (VIMS) conducts weekly surveys from June through early October to obtain oyster spatfall information. Spat counts are made from oyster shells strung on wire and suspended from stakes on public and private beds. The number of spat on shells are counted each week of the spawning season to determine the potential of a particular area for receiving a strike and to predict the most likely period the strikes will occur.
Effects Of Wastewater Discharges On Periphyton Growth In Lake Mead, Nevada-Arizona, Marsha Korb Morris
Effects Of Wastewater Discharges On Periphyton Growth In Lake Mead, Nevada-Arizona, Marsha Korb Morris
Publications (WR)
A study of the effects of secondary-treated wastewater on periphyton growth in Lake Mead, Nevada-Arizona was conducted from September 1979 to December 1980. Periphyton ash-free dry weight, chlorophyll-a, dominant species composition, and alkaline phosphatase activity were measured on fiberglass substrates. Substrates were incubated for two to four weeks in littoral and limnetic habitats. Physical and chemical variables and phytoplankton chlorophyll-a were measured concurrently.
Transparency increased with increasing distance from the discharge. Secchi depth ranged from 0.75 m at the discharge confluence (station 2) in August, to greater than 20 m at the most distant stations (stations 9 and 10) in …
Santa Clara Magazine, Volume 25 Number 3, Fall 1982, Santa Clara University
Santa Clara Magazine, Volume 25 Number 3, Fall 1982, Santa Clara University
Santa Clara Magazine
8 - A CHRISTIAN IN A NUCLEAR WORLD by William C. Spohn, S.J. Exploring an issue crucial to our time from a Christian perspective.
13 - A TEACHER FOR ALL SEASONS by Paul L. Locatelli, S.J. Discussing the challenges and the relationship between teaching and scholarship that beset today's teachers.
16 - NO MORE PUNCH AND COOKIES 20 successful years at Santa Clara mean women's sports are here to stay.
18 - KRASSOWSKI ON COMMUNICATION by Jeanne Huber '72. Some suggestions on the art from one of the university's most skilled communicators.
21 - ON CONSERVATORSHIP by George J. Alexander. …
The Prairie Naturalist Volume 14, No. 4. December 1982
The Prairie Naturalist Volume 14, No. 4. December 1982
The Prairie Naturalist
THE MICROBIAL AND VEGETATIONAL RESPONSE TO FIRE IN THE LYNX PRAIRIE PRESERVE, ADAMS COUNTY, OHIO ▪ A. E. Annala and L. A. Kapustka
ASPECTS OF BEHAVIOR IN FREE-RANGING BARBARY SHEEP (AMMOTRAGUS LERVIA) G. G. Gray and C. D. Simpson
HOME RANGES OF MULE DEER BUCKS IN THE TEXAS PANHANDLE ▪ B. H. Koerth and F. C. Bryant
DETERMINING SEX OF PLAINS POCKET GOPHERS BY INCISOR WIDTH ▪ R. M. Case and A. B. Sargeant
BOOK REVIEWS:
On Counting Birds ▪ S. A. Mikol
Freshwater Marshes ▪ R. M. Kaminiski
NOTICE TO AUTHORS ▪ Editor
INDEX TO VOLUME 14 …
Shire Of Manjimup : A Brief Assessment Of The Physical Land Resources With Respect To Horticultural Land Use, M R. Wells, K E. Hawley
Shire Of Manjimup : A Brief Assessment Of The Physical Land Resources With Respect To Horticultural Land Use, M R. Wells, K E. Hawley
Resource management technical reports
No abstract provided.
The Ias Bulletin, V16n3, November 1982, Iowa Academy Of Science
The Ias Bulletin, V16n3, November 1982, Iowa Academy Of Science
IAS Bulletin
In this issue:
--- 1982-83 A Year od Transition
--- Heritage Book Still Available at Reduced Prices
--- Update of Academy's Office Equipment
--- Heritage Authors Honored
--- Awards Committee Evaluates Nominations for the Governor's Science Medal
--- Proceedings Pipeline Continues
--- Evolution/Creation Archives Proposed
--- Farm House Burned (On Purpose)
--- Board Supports Formation of New Section to Replace Mathematics
--- Student Research Workshops Well-Attained
--- Membership Promotion
--- Education Committee Report Receives Wide Attention
--- Root Cause of Problems in Science Education Attributed to Public Priorities
--- Iowa Represented at National Meetings
--- Chemical Education Meeting
--- Reviews …
Spermidine-Condensed Phi X174 Dna Cleavage By Micrococcal Nuclease: Torus Cleavage Model And Evidence For Unidirectional Circumferential Dna Wrapping., Kenneth A. Marx, Thomas C. Reynolds
Spermidine-Condensed Phi X174 Dna Cleavage By Micrococcal Nuclease: Torus Cleavage Model And Evidence For Unidirectional Circumferential Dna Wrapping., Kenneth A. Marx, Thomas C. Reynolds
Dartmouth Scholarship
Spermidine-condensed phi X174 replicative form (RF) II DNA was digested with micrococcal nuclease to yield seven identifiable DNA bands forming an arithmetic fragment-length series. The DNA monomer unit length was found to be 780 +/- 80 base pairs. This result is most consistent with a proposed model for micrococcal nuclease cleavage of a DNA torus organized by the unidirectional, circumferential wrapping of B-geometry DNA. By a topological consideration, the blunt-end-rod-fusion model for torus formation [Eickbush, T. H. & Moudrianakis, E. N. (1978) Cell 13, 295-306] is shown to be inconsistent with our empirical solution results. We propose a continuous, circumferential …
The Effects Of Varying Fresh Water Discharge On Dispersion In An Estuarine Hydraulic Model Of The Lafayette River, Norfolk, Virginia, Michael J. Jugan
The Effects Of Varying Fresh Water Discharge On Dispersion In An Estuarine Hydraulic Model Of The Lafayette River, Norfolk, Virginia, Michael J. Jugan
OES Theses and Dissertations
Three experimental tests were conducted in the Lafayette River branch of the Chesapeake Bay Hydraulic Model, each successive test with an increase in the amount of fresh water discharged into the head of the river. This was done to study the response from varying river discharge on mixing parameters including the longitudinal dispersion coefficient (E).
The model generated a tide of constant range and period. Batch releases of Rhodamine WT dye were made in the model and sampled throughout the river for ten tidal cycles. Samples were taken simultaneously at selected high and low water slack.
The calculation of the …
Morphological Variation Of The Foraminifer Elphidium Excavatum (Terquem) On Crumps Bank And Willoughby Bank, Chesapeake Bay, Virginia, Pamela Kay Painter
Morphological Variation Of The Foraminifer Elphidium Excavatum (Terquem) On Crumps Bank And Willoughby Bank, Chesapeake Bay, Virginia, Pamela Kay Painter
OES Theses and Dissertations
Six variants of the highly variable foraminiferal species, Elphidium excavatum (Terquem) were recognized in the Crumps Bank and Willoughby Bank areas of the southern Chesapeake Bay. Measurements of the size of the test, the number of chambers, the number of umbilical bosses, and the number and average length of the sutural bridges on the last formed chamber, and opaqueness or translucence of the test were made on 30 specimens from each of 36 stations selected for differences in environmental parameters. The measurements were statistically analyzed by discriminant analysis to test the hypothesis that the variants are distinct morphotypes and to …
Factors Effecting Phytoplankton Assemblages In The Lafayette River Estuary, Laurie Ann Kalenak
Factors Effecting Phytoplankton Assemblages In The Lafayette River Estuary, Laurie Ann Kalenak
OES Theses and Dissertations
Chemical and physical parameters were measured with phytoplankton species composition and abundance in the Lafayette River from August to October 1981. Stations located in four distinct areas of the river were statistically analyzed to determine data relationships. Environmental factors considered as potentially influencing the presence and numbers of phytoplankton were salinity, temperature, Secchi depth, tidal phase, orthophosphate, combined nitrates and nitrites, ammonia, and reactive silicates.
The River mouth had higher salinity and nutrient values, with lower temperatures than the other river sections. Diatoms were the dominant cells in this section of the River. At mid-river, salinity and nutrient concentrations decreased, …
Environmental Influence On The Migratory Behavior Of The Brown Shrimp In Pamlico Sound North Carolina, Michael Andrew Matylewich
Environmental Influence On The Migratory Behavior Of The Brown Shrimp In Pamlico Sound North Carolina, Michael Andrew Matylewich
OES Theses and Dissertations
Environmental conditions in the nursery areas during times of development affect the migratory behavior of the brown shrimp (Penaeus aztecus) by influencing growth and natural mortality. A linearized logistic model and a multiple linear model are used to relate environmental factors (week number, water temperature, salinity, air temperature, precipitation, net heating degree days, river discharge) to the cumulative proportion of catch and catch-per-unit-effort, respectively. Multiple regression analysis yielded equations containing the week number, the water temperature and an interaction term as the independent variables. Predictions of total annual yield and total annual catch-per-unit-effort are made using the migratory …
The Prairie Naturalist Volume 14, No. 3. September 1982
The Prairie Naturalist Volume 14, No. 3. September 1982
The Prairie Naturalist
FECAL pH OF DESERT AND EASTERN COTTONTAIL RABBITS IN TEXAS ▪ R. J. Warren and K. T. Scribner
NESTING OF THE AMERICAN AVOCET IN NORTH DAKOTA ▪ J. G. Sidle and P. M. Arnold
REVISED CHECKLIST OF NORTH DAKOTA BIRDS ▪ C. A. Fannes and R. E. Stewart
THE EFFECT OF WEATHER FACTORS ON AUDUBON CHRISTMAS BIRD COUNTS L. L. Falk
NOTES:
Additional Nest Record for Red-breasted Nuthatch in North Dakota ▪ R. Hopkins
A Henslow's Sparrow in North Dakota ▪ R. B. Renken and J. J. Dinsmore
First Documented Record of the Moose in South Dakota ▪ D. A. …
Recipe Design And Management In A Nutritional Data Base System, Robert G. Trenary
Recipe Design And Management In A Nutritional Data Base System, Robert G. Trenary
Masters Theses
The Nutritional Data Base System (NDBS) is an interactive information system which provides the user the ability to create and process menus, recipes and food items. Three primary program modules are thus indicated along with modules to translate user requests and process file and directory information. A discussion of standard data base concepts and an application of these concepts to the processing of recipes in the NDBS system is presented. Future possible expansions are suggested and other similar information systems are discussed.
Quantitative Reef Assessment Studies In Bermuda: A Comparison Of Methods And Preliminary Results, Richard E. Dodge, Alan Logan, Arnfried Antonius
Quantitative Reef Assessment Studies In Bermuda: A Comparison Of Methods And Preliminary Results, Richard E. Dodge, Alan Logan, Arnfried Antonius
Marine & Environmental Sciences Faculty Articles
To compare in quantitative terms both ecological characteristics of the stony coral fauna at various reef sites in Bermuda and available assessment methodologies, we present a study of four separate methods at each of three reef sites. Three plotless (Intersected-length, Quarter point, Point) and one quadrat (Belt-quadrat) methods were employed. Each technique gave similar results but had inherent advantages and disadvantages which involve trade-offs in quantity and type of information generated and time required for use.
Pooling of method results revealed that total coral coverage was highest at North Rock (26%), intermediate at Three Hill Shoals (17%), and lowest at …
Some Variations In Distribution Of Fishes In Large Mainstream Reservoirs Associated With Artificial Cover, Donald W. Johnson, Elizabeth M. Choinski
Some Variations In Distribution Of Fishes In Large Mainstream Reservoirs Associated With Artificial Cover, Donald W. Johnson, Elizabeth M. Choinski
KWRRI Research Reports
The influence of artificial cover (brush piles) on fish populations in Kentucky Lake and Lake Barkley was studied. Mature and larval fishes were collected from deep and shallow sites with and without cover in a bay of each lake. Highest densities of mature crappie, bass, and sauger were found adjacent to deep attractors, while larval crappie and minnows were most concentrated at shallow brush piles. Shad (both adult and larvae) were not congregated at attractor sites. Information gathered supports the continuation of artificial cover installation and water level management procedures which will provide high and stable levels through spring spawning …
An Ecological Analysis Of Relic Diatoms In Sediments Of Las Vegas Bay, Lake Mead, David Ross Hetzel
An Ecological Analysis Of Relic Diatoms In Sediments Of Las Vegas Bay, Lake Mead, David Ross Hetzel
Publications (WR)
Relic diatoms in sediments of the inner Las Vegas Bay, near the Las Vegas Wash sewage inflow, were examined in order to assess historic trophic conditions in this area of Lake Mead. Diatom sedimentation rates and ratios of Araphidineae/Centrales (A/C) diatom groups were determined from sediment cores collected in the old wash channel 1.5 km from the sewage inflow (station 2), in a small cove 1.5 km further downstream (station 3) and in an adjacent embayment off Gypsum Wash (station 4). Diatom sedimentation rates generally increased from the bottom to the top of each core, but pronounced minima existed at …
The Effects Of Kepone On The Estuarine Copepod Acartia Tonsa, Judith Marie Wilson
The Effects Of Kepone On The Estuarine Copepod Acartia Tonsa, Judith Marie Wilson
Biological Sciences Theses & Dissertations
Due to the contamination of a 113 km reach of the James River, Kepone poses a serious environmental threat to the Chesapeake Bay. The purpose of the study is to determine the acutely toxic and sublethal levels of kepone for the copepod Acartia tonsa, and to investigate what effects those levels may have on filtration rates.
Kepone was determined to be acutely toxic to A. tonsa, with a 96 hour LC50 of 4.96 ug/1. Dunaliella tertiolecta was selected as the food source for the grazing experiments. Kepone concentrations of 0.046 ug/1 significantly (0.05 level) reduced the flltering rate …
The Sale, Lease Or Exchange Of Indian Water Rights For Energy Development, Thomas W. Fredericks
The Sale, Lease Or Exchange Of Indian Water Rights For Energy Development, Thomas W. Fredericks
New Sources of Water for Energy Development and Growth: Interbasin Transfers: A Short Course (Summer Conference, June 7-10)
34 pages.
Contains references.
Weather Resources Management And Interbasin Transfer Law [Outline], Ray Jay Davis
Weather Resources Management And Interbasin Transfer Law [Outline], Ray Jay Davis
New Sources of Water for Energy Development and Growth: Interbasin Transfers: A Short Course (Summer Conference, June 7-10)
21 pages (includes illustrations).
Water Problems & Issues Affecting United States-Mexico Relations: Policy Options & Alternatives, Albert E. Utton
Water Problems & Issues Affecting United States-Mexico Relations: Policy Options & Alternatives, Albert E. Utton
New Sources of Water for Energy Development and Growth: Interbasin Transfers: A Short Course (Summer Conference, June 7-10)
42 pages.
Contains 6 pages of endnotes.
New York City’S Battles For Imported Water, J. Kevin Healy
New York City’S Battles For Imported Water, J. Kevin Healy
New Sources of Water for Energy Development and Growth: Interbasin Transfers: A Short Course (Summer Conference, June 7-10)
16 pages (includes illustrations and maps).
The Central Arizona Project, Jon Kyl
The Central Arizona Project, Jon Kyl
New Sources of Water for Energy Development and Growth: Interbasin Transfers: A Short Course (Summer Conference, June 7-10)
38 pages (includes illustrations).
Contains footnotes.
Contains 9 attachments.