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Articles 49621 - 49650 of 52509
Full-Text Articles in Entire DC Network
The Joint Venture Controversy: A Short-Term Solution For A Long-Term Fisheries Policy, Laurie A. Frost
The Joint Venture Controversy: A Short-Term Solution For A Long-Term Fisheries Policy, Laurie A. Frost
Marine Affairs Theses and Major Papers
This paper will examine the development of joint ventures under the FCMA, the legislative and regulatory measures designed to control these ventures and the procedures for establishing a joint venture. More recent developments in joint venture policy will be examined, including the controversy over squid joint ventures on the East Coast, to determine what the objectives are and what current policy is regarding join ventures. The debate between harvesters and processors will be put forth as a way of summarizing the costs and benefits of joint ventures to the industry as a whole.
State Of The Fisheries Report 1982, Department Of Fisheries And Wildlife, Western Australia
State Of The Fisheries Report 1982, Department Of Fisheries And Wildlife, Western Australia
Status Reports of the Fisheries and Aquatic Resources
Western Australia continues to be one of the States in Australia. leading fishing The total gross value of fish, crustaceans and molluscs for 1981/82 was $99.4 million (Table 1) to which may be added the value of the pearl culture industry resulting in a total value of approximately $114 million.
Mentors And Colleagues: [Dr. Clarence Connelly], Fulvio Bardossi, Judith N. Schwartz
Mentors And Colleagues: [Dr. Clarence Connelly], Fulvio Bardossi, Judith N. Schwartz
Rockefeller University Research Profiles
Rockefeller University Research Profiles are a series of scientific profiles that were published quarterly, from 1980-1990, by the Rockefeller University. Each issue features the research and achievements of an individual Rockefeller University scientist.
Adaptations Of Dolphin Vision To The Oceanic Environment, Andre Rivamonte
Adaptations Of Dolphin Vision To The Oceanic Environment, Andre Rivamonte
OES Theses and Dissertations
The objective of this study has been to develop an hypothesis explaining comparable aerial and underwater visual acuity of the bottlenose dolphin, Tursiops truncatus. This objective was accomplished by integrating the findings of other dolphin researchers working in the fields of comparative psychology, histology and ophthalmology. Their combined results enabled the formulation of a schematic dolphin eye. It is proposed that a dolphin lens, similar to the spherical lens of teleost fish with a rigid core of uniformly high refractive index and a margin of radially decreasing refractive index, could function as a bifocal lens and compensate for the eye's …
The Effects Of Dominant Species Removal On Subtidal Community Development, H. Russell Barker Jr.
The Effects Of Dominant Species Removal On Subtidal Community Development, H. Russell Barker Jr.
Biological Sciences Theses & Dissertations
Acrylic panels were used to follow the development of the fouling community at Channel Points, Lynnhaven Bay, Virginia, from April through October 1979. The roles of Membranipora tenuis, an encrusting ectoproct, and Molgula manhattensis, a solitary tunicate, were studied by removing each species from the developing community on a weekly basis.
Early colonization was dominated by Membranipora followed by Corophium spp. (Amphipoda), Polydora ligni (Polychaeta), and Balanus eberneus (Arthropoda). Molgula colonized the panels later in the study and became a dominant occupier of primary space by the end of the study.
The removal of Membranipora and Molgula …
The Distribution Of Phytoplankton In Frontal Regions Of The Lower Chesapeake Bay, Richard V. Lacouture
The Distribution Of Phytoplankton In Frontal Regions Of The Lower Chesapeake Bay, Richard V. Lacouture
OES Theses and Dissertations
The spatial and temporal distribution of phytoplankton was measured in relation to frontal areas located in the entrance to the Chesapeake Bay. Phytoplankton biomass, taxonomy, and several physical parameters were measured on fifteen sampling cruises between September,1981 and February, 1983.
Several statistical tests revealed that phytoplankton biomass did not accumulate at the fronts and that generally the distribution of phytoplankton biomass was homogenous across the frontal region. The cell count data indicated that the community structure of the phytoplankton assemblage was usually very similar on both sides of the front. The data which was concerned with temporal variations in the …
The Effects Of The Mud Snail Ilyanassa Obsoleta (Say) Upon The Benthic Community Of Broad Bay, Virginia, Wick Timothy Harlan
The Effects Of The Mud Snail Ilyanassa Obsoleta (Say) Upon The Benthic Community Of Broad Bay, Virginia, Wick Timothy Harlan
Biological Sciences Theses & Dissertations
The effects of the presence of the mud snail Ilyanassa obsoleta (Say) upon the benthic community of Broad Bay, Virginia were examined through artificial removal and exclusion of the snail and artificial increase of the snail population. The enclosure treatment exhibited a significantly higher number of macrofaunal individuals than the control. The control had a significantly higher number of meiofaunal individuals than either treatment. There were no significant differences for the chlorophyll a. The increase in macrofauna and corresponding decrease in meiofauna were probably due to cage effects and not snail densities. The presence of the fences can act as …
Determination Of N,N'-Diphenylguanidine In Biological Tissues And Fluids Using High Pressure Liquid Chromatography, Edward Sidney Hunter Iii
Determination Of N,N'-Diphenylguanidine In Biological Tissues And Fluids Using High Pressure Liquid Chromatography, Edward Sidney Hunter Iii
Chemistry & Biochemistry Theses & Dissertations
N,N'-Diphenylguanidine (DPG) is a potentially toxic compound used in the vulcanization of rubber products. Distribution of DPG in hybrid mice (C57BL/6J interbred with DAB2) was determined following intraperitoneal injection. Urine, fecal material, whole blood and tissues were collected at various times after administration of DPG and the extracts analyzed for DPG by high pressure liquid chromatography. Recovery of DPG from spiked urine and whole blood exceed 90%, however, the recovery of DPG from spiked tissue samples was approximately 70%.
DPG concentration in whole blood reached a maximum within ten minutes and rapidly decreased through 180 minutes after administration …
The Effect Of Sea Nettle Abundance On The Food Chain Of The Lower Chesapeake Bay, Michael Glenn Kelly
The Effect Of Sea Nettle Abundance On The Food Chain Of The Lower Chesapeake Bay, Michael Glenn Kelly
OES Theses and Dissertations
The significance of sea nettle abundance on lower levels of the Chesapeake Bay food chain was examined in a field study and by the analysis of medusa gut contents. In the field study, the abundance of four levels of the food chain (Chlorophyll (a), copepods, the ctenophore Mnemiopsis leidyi, and the Schyphomedusa Chrysaora guinguecirrha) were monitored twice weekly at four stations from May 10 through September 30, 1982. The copepod standing stock declined sharply in late May when M. leidyi appeared, but rebounded a month later when C. guinguecirrha medusae reduced the ctenophore population. Despite the additional presence …
The Effects Of Dredged Materials On The Copeod, Acartia Tonsa, Renee Suzanne Crouch
The Effects Of Dredged Materials On The Copeod, Acartia Tonsa, Renee Suzanne Crouch
Biological Sciences Theses & Dissertations
A study was conducted to determine the potential impact of open ocean disposal of sediments dredged from a highly industrialized seaport. Sediments from three potential dredge sites along the Southern Branch of the Elizabeth River, Hampton Roads, Virginia were evaluated for acute toxicity. The suspended particulate fractions of dredged materials were tested in a series of 96-hour, static bioassays using the calanoid copepod, Acartia tonsa Dana. Significant mortalities were observed for all three sites with the sediments from the most heavily industrialized site producing immediate and severe mortality. Analysis of results indicates that mortality was highly related to the volatile …
An Evaluation Of Trapping Efforts To Capture Bobcats, Coyotes, And Red Fox, John A. Litvaitis, Mark O'Donoghue, Mathew Miller, James A. Sherburne
An Evaluation Of Trapping Efforts To Capture Bobcats, Coyotes, And Red Fox, John A. Litvaitis, Mark O'Donoghue, Mathew Miller, James A. Sherburne
Wildlife Damage Management Conference
Wildlife biologists are often involved in efforts to capture free-ranging felids and canids. The objective of these efforts is usually to remove individuals causing unwanted or excessive predation, or to obtain study animals. The most common method used to capture carnivores includes some type of leg-hold trap. Numerous references provide information on the technique of leg-hold trapping (Taylor 1971, Musgrove and Blair 1979); however few reports include an evaluation of these methods.
Analysis Of Estrogen And Progesterone Binding Sites In Cytosol And Nuclei Of 7,12-Dimethybenz (A) Anthracene-Induced Rat Mammary Carcinoma: Hormone-Dependent Vs. Hormone Independent Tumor Populations, Danny Michael Burns
Morehead State Theses and Dissertations
A thesis presented to the faculty of the School of Sciences and Mathematics at Morehead State University in partial fulfillment of the requirement for the Degree of Master of Science in Biology by Danny Michael Burns on September 6, 1983.
The Prairie Naturalist Volume 15, No. 3. September 1983
The Prairie Naturalist Volume 15, No. 3. September 1983
The Prairie Naturalist
Paul B. Kannowski, Editor
Douglas H. Johnson, Book Review Editor
TABLE OF CONTENTS
WINTER DISTRIBUTION AND HABITAT USE BY MULE DEER AND WHITE-TAILED DEER IN SOUTHEASTERN MONTANA ▪ J. E. Swenson, S. J. Knapp and H. J. Wentland
HISTORY AND STATUS OF EUROPEAN FALLOW DEER (Dama dama dama) AT ARGONNE NATIONAL LABORATORY, ILLINOIS ▪ G. G. Gray
REPRODUCTIVE CHRONOLOGY OF GREATER PRAIRIE CHICKENS IN MINNESOTA AND RECOMMENDATIONS FOR CENSUSING AND NEST SEARCHING ▪ W. D. Svedarsky
SUMMER BIRD USE OF A STATE-OWNED HUNTING AREA IN NORTHWESTERN ILLINOIS ▪ M. W. Brown
EVALUATION OF INTRODUCED RUFFED GROUSE IN WESTERN …
Busy In The Meadow: [Dr. Vincent Dole], Fulvio Bardossi, Judith N. Schwartz
Busy In The Meadow: [Dr. Vincent Dole], Fulvio Bardossi, Judith N. Schwartz
Rockefeller University Research Profiles
Rockefeller University Research Profiles are a series of scientific profiles that were published quarterly, from 1980-1990, by the Rockefeller University. Each issue features the research and achievements of an individual Rockefeller University scientist.
Atlas Of Wetlands In The Principal Coal Surface Mining Region Of Western Kentucky, William J. Mitsch, Jan R. Taylor, Kimberly B. Benson, Paul L. Hill Jr.
Atlas Of Wetlands In The Principal Coal Surface Mining Region Of Western Kentucky, William J. Mitsch, Jan R. Taylor, Kimberly B. Benson, Paul L. Hill Jr.
KWRRI Research Reports
This atlas contains maps of wetlands and surface mining activity in the Western Kentucky Coal Field, and focuses on a 3960 km2 (1530 mi2) region where approximately 90 percent of surface mining in the Coal field occures. Some present and potential competition exists between surface coal mining and wetland protection. A wetland classification, based on the recent FWS classification, includes six types of palustrine systems and one each of riverine and laucstrine systems. Wetlands and surface mines are located on twenty-seven 7.5 minute USGS quadrangles that define the study region. A total of 460 km2 (177 …
The Effect Of Crowding On Growth Of The Cichlid Fish, Oreochromis Mossambicus, Bonnie A. Barrows
The Effect Of Crowding On Growth Of The Cichlid Fish, Oreochromis Mossambicus, Bonnie A. Barrows
OES Theses and Dissertations
It has been reported that the Java tilapia, Oreochromis mossambicus, displays hypersensitivity to a substance it produces when biomass levels in a flow-through culture system exceed 20 g/1, resulting in reduced growth and high mortality. Experiments on the growth of this species in small tanks were conducted in order to determine whether O. mossambicus produces a growth-inhibiting compound under crowded conditions. This species was successfully maintained at biomass levels of 38 g/1 and 57 g/1 with a total mortality of only 4.5%.
The Java tilapia can grow rapidly in small aquaria, as indicated by the data taken during Experiment …
The Relationship Of Size Class Distribution To Migratory Behavior In Brown Shrimp (Penaeus Aztecus) In Pamlico Sound, North Carolina, Mario A. Paula
The Relationship Of Size Class Distribution To Migratory Behavior In Brown Shrimp (Penaeus Aztecus) In Pamlico Sound, North Carolina, Mario A. Paula
OES Theses and Dissertations
The potential of migratory timing information for dynamic yield estimation in the North Carolina brown shrimp fishery has been shown. The present research investigates the influence of size class distribution on the quantitative characterization of migratory timing in the brown shrimp. Catch and nominal effort data were stratified into count size ranges and the time density model of Mundy (1979) was specified for each stratum. The recruitment patterns of the shrimp into the fishery was also investigated.
The stratification of time densities by size class has shown a definite pattern in the migratory behavior of the brown shrimp. It appears …
The Growth And Feeding Behavior Of Juvenile Spot, Leiostomus Xanthurus Lacepede, In The Nursery Region Of The James River, Virginia, John Thomas Mccambridge Jr.
The Growth And Feeding Behavior Of Juvenile Spot, Leiostomus Xanthurus Lacepede, In The Nursery Region Of The James River, Virginia, John Thomas Mccambridge Jr.
OES Theses and Dissertations
The in situ growth and feeding behavior of juvenile spot, Leiostomus xanthurus Lacepede, was investigated for populations in the nursery area of the James River, Virginia. Growth of juvenile spot was found to be fairly rapid (11.34 mm/month, standard length) during their first summer in the nursery grounds, but it levelled off in the autumn. The mean size of spot after the first year was calculated to be 195 mm total length. The weight-length relationship was log W = -5.018 + 3.246(log L), where W = wet weight in grams and L = standard length in millimeters.
Juvenile spot appeared …
Simultaneous Functional Hermaphroditism In The Shrimp Hippolysmata Wurdemanni (Gibbes) (Decopoda: Caridea: Hippolytidae), Marie Hollister Bundy
Simultaneous Functional Hermaphroditism In The Shrimp Hippolysmata Wurdemanni (Gibbes) (Decopoda: Caridea: Hippolytidae), Marie Hollister Bundy
OES Theses and Dissertations
The caridean shrimp Hippolysmata wurdemanni Gibbes was studied from a histological and a behavioral basis and was found to be a protandric hermaphrodite which later adopts simultaneous functional hermaphroditism. When the animal reaches a certain size, the androgenic gland degenerates, the male secondary sexual characteristics are lost, and vitellogenesis occurs in the anterior portion of the gonad. The animals do not lose the ability to function as males as evidenced by the presence of mature sperm in the gonad and the gonadal lumen of gravid shrimp, and the ability of both members of an isolated pair of shrimp to repeatedly …
A Model Of The Population Dynamics Of The Blue Crab In Chesapeake Bay, Betty Springer Hester
A Model Of The Population Dynamics Of The Blue Crab In Chesapeake Bay, Betty Springer Hester
OES Theses and Dissertations
This study has particular application to the blue crab fisheries in Chesapeake Bay, an economically important industry whose successful management has been hindered by relatively poor understanding of the population dynamics. Recent biological studies have indicated a systematic spawning behavior which seems designed for ejection of larvae seaward from the bay entrance where they spend their pre-metamorphosis stages in the neuston. A physical mechanism for retention of the larvae in sufficient proximity to the bay entrance for their return at the proper time which involves the action of wind stress in shallow waters is proposed. Since the supply of blue …
Determination Of Erythrocyte Zinc Concentrations Using Zeeman Effect Atomic Absorption Spectroscopy, Tanya Maranda Lewis
Determination Of Erythrocyte Zinc Concentrations Using Zeeman Effect Atomic Absorption Spectroscopy, Tanya Maranda Lewis
Chemistry & Biochemistry Theses & Dissertations
The purpose of this research project was to develop assay procedures for determination of zinc in erythrocytes. Three methodologies were developed. The methods were evaluated on the basis of within-run and between-run precision. The most reproducible method, the 213.856 nm flame methodology, was used to determine red blood cell zinc concentrations in more than 200 samples obtained from the Neonatal Intensive care Unit at the Children's Hospital of the King's Daughters.
This study demonstrated that erythrocyte zinc levels in premature infants were similar to those of healthy adults. A linear relation between plasma and red blood cell zinc concentrations was …
Santa Clara Magazine, Volume 25 Number 8, Spring 1983, Santa Clara University
Santa Clara Magazine, Volume 25 Number 8, Spring 1983, Santa Clara University
Santa Clara Magazine
2 - FIRST FRIEND by Robert Meyers. Nevada Senator Paul Laxalt talks about his special relationship with the President of the United States.
6 - A CONVERSATION WITH BROTHER ROGER by Patrick Samway, S.J. An interview with the founder of a remarkable ecumenical community that has become a source of inspiration for Christians everywhere.
11 - JESUIT CHAPLAINS IN WORLD WAR II by Donald F. Crosby, S.J. Chronicling the involvement of 273 Sons of Loyola who marched off as chaplains in World War II.
15 - PSYCHOLOGY AT THE STOCK EXCHANGE by Jerry Kroth. Can psychology provide us with an …
The Artificial Pancreas Today, James F. Mcmurry Jr.
The Artificial Pancreas Today, James F. Mcmurry Jr.
Henry Ford Hospital Medical Journal
An artificial pancreas is now available in selected centers for clinical use in blood glucose control. With information derived from 24-30 hours of "closed-loop" insulin administration by means of the artificial pancreas, subcutaneous insulin doses may be determined for insulin-dependent diabetic patients. Eleven poorly controlled diabetic patients had their insulin doses reevaluated with the artificial pancreas. Ten of 11 patients showed improved glucose control when their insulin doses were modified by this method.
The Induction Of Tolerance To Heavy Metals In Natural And Laboratory Populations Of Fish, Wesley J. Birge, William H. Benson, Jeffrey A. Black
The Induction Of Tolerance To Heavy Metals In Natural And Laboratory Populations Of Fish, Wesley J. Birge, William H. Benson, Jeffrey A. Black
KWRRI Research Reports
Aquatic toxicity studies were performed on two natural populations of fathead minnows. One group of organisms was taken from a metal-contaminated flyash pond associated with a coal-fired power plant and the other group was collected from relatively uncontaminated hatchery ponds. Acute tests indicated that flyash pond fish were significantly more tolerant to cadmium and copper than were hatchery fish. At an exposure concentration of 6.0 mg Cd/L in moderately hard water, the median period of survival for flyash pond fish was 50.0 hr compared to 6.8 hr for hatchery fish. Both groups of organisms were about equally sensitive to zinc. …
Effects Of Surface Application Of Dairy Manure On The Infiltration Rate And Quality Of Surface Runoff, Joseph L. Taraba, I. J. Ross, John D. Bottom, Bill J. Barfield
Effects Of Surface Application Of Dairy Manure On The Infiltration Rate And Quality Of Surface Runoff, Joseph L. Taraba, I. J. Ross, John D. Bottom, Bill J. Barfield
KWRRI Research Reports
Dairy manure was surface spread on 12 ft x 12 ft plots on an established fescue pasture in the summer and fall of 1981 and 1982. The soil was a Maury silt loam. A simulated rainfall was applied to plots to test the effects of nitrogen loading rate (75, 150, and 300 #N/acre) time delay between manure application and the simulated rainfall events (0, 3, 6, 24, 48, 96 hours and a 120 hour test repeated on 0 hr plot with 300 #N/acre), and type manure (semi-solid - 1981 and liquid - 1982) on the concentrations of pollutants in the …
Baseline Study For Monitoring Variations In Nitrate Concentration In Surface Waters Of Cuyamaca Rancho State Park In Relation To Watershed Types, Lester E. Harris Iii
Baseline Study For Monitoring Variations In Nitrate Concentration In Surface Waters Of Cuyamaca Rancho State Park In Relation To Watershed Types, Lester E. Harris Iii
Loma Linda University Electronic Theses, Dissertations & Projects
The purpose of this study was to compare the variations in nitrate concentration in the surface waters of five different watershed community types at Cuyamaca Rancho State Park. Monthly water samples were collected at selected sites below each watershed and analyzed by use of a specific ion electrode for nitrate concentration. Results indicate that variations in nitrate concentration are influenced by seasonal variation in rainfall. The yellow pine forest/chaparral watershed showed the highest mean nitrate concentration, three to four times higher than the other watershed types analyzed. Peak nitrate concentrations did not approach the maximum safe limit for human or …
Day-Degree Methods For Pest Management, Kenneth P. Pruess
Day-Degree Methods For Pest Management, Kenneth P. Pruess
Department of Entomology: Faculty Publications
Recommendations are made for reporting day-degree methods which may have practical applications. Standardized thresholds (40, 50, and 60°F, or 5, 10, and 15°C) should be used. Day-degrees may be either sine wave approximations or exact units determined by instrumentation. Methods are proposed for converting current day-degree models to standardized thresholds and, ultimately, to actual day-degrees.
The Prairie Naturalist Volume 15, No. 2. June 1983
The Prairie Naturalist Volume 15, No. 2. June 1983
The Prairie Naturalist
Paul B. Kannowski, Editor
Douglas H. Johnson, Book Review Editor
TABLE OF CONTENTS
EFFECTS OF FIRE ON RODENTS IN TALLGRASS PRAIRIE OF THE FLINT HILLS REGION OF EASTERN KANSAS. D. W. Kaufman, G. A. Kaufman, and E. J. Finck
FECAL pH AND FOOD HABITS OF SYMPATRIC LAGOMORPHS IN TEXAS R. J. Warren
UNUSUAL PLANT ASSEMBLAGE IN WALSH COUNTY, NORTH DAKOTA ▪ B. Heidel
ADDITIONAL RECORDS OF PASSERINES FEEDING ON POPLAR GALLS, AND A POSSIBLE MECHANISM FOR SUMMER NOMADISM IN BOREAL FINCHES ▪ P. J. DuBowy
UPDATE ON THE AMERICAN BALD EAGLE, Haliaeetus leucocephalus L., IN NEBRASKA ▪ S. J. Rothenberger …
The Combined Effect Of Cu And Zn On Selenastrum Capricornutum, Helmer Colonia-Roque
The Combined Effect Of Cu And Zn On Selenastrum Capricornutum, Helmer Colonia-Roque
Dissertations and Theses
It has been demonstrated that the toxicity of heavy metals depends on their chemical speciation and can be related to their free ion activities, rather than the total metal concentrations. The objective of this study was to determine the effect of combined free ions of zinc and copper on the toxicity to the green alga Selenastrum capricornutum. This alga was grown in a defined medium, under controlled laboratory conditions, with a varying range of zinc and copper concentrations. The growth rate of the alga was inhibited at pZn = 5.93 or at pCu = 7.24. The results suggest that …
The Effect Of The Endangered Species Act Of 1973, Robert Palmer Yankle Ii
The Effect Of The Endangered Species Act Of 1973, Robert Palmer Yankle Ii
Marine Affairs Theses and Major Papers
Scrimshaw, as an art form, had just recently risen a few notches above the state of obscurity. There are still millions of Americans who probably know nothing about it. Inextricably linked with the whaling industry for years, the scrimshaw industry has recently undergone a remarkable transition. When whaling ended in the United States, scrimshaw moved ashore and some people found out that there was a great deal of money to be made in the scrimshaw business. but with the passage of the Marine Mammals Protection Act in 1973, scrimshanders found themselves being tightly regulated by the Federal government. This paper …