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Articles 48631 - 48660 of 52448
Full-Text Articles in Physical Sciences and Mathematics
Timber Supply From Private Nonindustrial Forests, Clark Shepard Binkley
Timber Supply From Private Nonindustrial Forests, Clark Shepard Binkley
Yale School of the Environment Bulletin Series
No abstract provided.
Age And Growth Rate Of Tropical Trees: New Directions For Research, F. Herbert Bormann, Ed., Graeme Berlyn, Ed.
Age And Growth Rate Of Tropical Trees: New Directions For Research, F. Herbert Bormann, Ed., Graeme Berlyn, Ed.
Yale School of the Environment Bulletin Series
No abstract provided.
A Survey Of Water Flow In Drainage Ditches And Streams In South Central Minnesota, Clay L. Pierce, Bill Thompson
A Survey Of Water Flow In Drainage Ditches And Streams In South Central Minnesota, Clay L. Pierce, Bill Thompson
Clay L. Pierce
Discharge was monitored on 13 agricultural drainage ditches and 4 small rivers in south central Minnesota. Derived data were categorized by response to hydrologic events and stream order. Stream order was found to be the most reliable predictor of hydrologic event response. Peak flows in drainage ditches were found to correspond to peak flows in rivers.
A Generalized Inland Fishery Simulator For Management Biologists, Melvin W. Taylor
A Generalized Inland Fishery Simulator For Management Biologists, Melvin W. Taylor
Nebraska Game and Parks Commission: Staff Research Publications
Presently available fishery models are either too simplified or too complicated to be useful to inland fishery managers. This research was directed toward developing a simplified but realistic computerized simulator useful to fishery managers. The model developed is basically an ageclass structured simulator with features built in to allow easy but effective use by fishery managers. It includes provisions for input of all important parameters plus provisions for density-dependent relationships where applicable. Examples of model use are given for a put-and-take rainbow trout (Salmo gairdneri) fishery and a self-sustaining walleye (Stizostedion vitreum) population.
Is Nature Our Birthright?, Nancy Heneson
Is Nature Our Birthright?, Nancy Heneson
Ecology Collection
It is of course impossible to escape the notion of self-interest in our relationship with nature. In fact, it is "unnatural," if one understands (and, one is forced to say nowadays, believes in) evolution. However, there is no real justification for either disguising this as stewardship or perverting it into dominionism. Every organism has an impact on the environment, and it is not only idealistic but biologically nonsensical to argue that we should leave everything alone. However, when decisions on policy are made which direct the future use of land, plants and animals, at least let the rationale not be …
Initial Growth And Survival Of Bluegills And Black Bullheads Stocked With Largemouth Bass In South Dakota Ponds, James J. Shelley
Initial Growth And Survival Of Bluegills And Black Bullheads Stocked With Largemouth Bass In South Dakota Ponds, James J. Shelley
Electronic Theses and Dissertations
Initial growth and survival rates were estimated for bluegills (Leponis macrochirus) and black bullheads (Ictalurus melas) stocked simultaneously with largemouth bass (Micropterus salmoides) in ponds throughout South Dakota. Mean first year survival for bluegills and black bullheads stocked in eastern South Dakota ponds was 28.6% and 67.7%, respectively. Differences in first year bluegill growth throughout the state were not detected. Total lengths for bluegills averaged 52.4 mm after one growing season statewide and 137.1 mm after two growing seasons in southeastern South Dakota ponds. Significant (P<.05) geographical differences in first year growth of black bullheads were detected with mean lengths ranging from 67.7 mm in northwest ponds to 115.5 mm in southeast ponds. The average total length for black bullheads after two growing season in southeastern South Dakota ponds was 215.2 mm. The combined effects of pH, turbidity, and bicarbonate alkalinity accounted for 67.5% of the variation in first year bluegill growth. The pond parameters total number of growing days, fish present prior to stocking, and pond surface area when combined accounted for 73.9% of the variation in first year black bullhead growth. Differences in bluegill relative weight values were not detected throughout South Dakota; the average for the state was 105.2. Mean black bullhead condition factors (K) for fish with total lengths between 128 and 191 mm were 1.85 and 1.45 for pre- and post-spawning periods, respectively. Bullheads probably spawned between 29 May and 26 June 1980.
Movement And Distribution Of Esocids And Forage Fishes In A Power Plant Cooling Reservoir, Douglas T. Henley
Movement And Distribution Of Esocids And Forage Fishes In A Power Plant Cooling Reservoir, Douglas T. Henley
Electronic Theses and Dissertations
One Muskellunge (Esox masquinongy) and 2 northern pike (E. Lucius) were surgically implanted with untrasonic transmitters and tracked in a South Dakota cooling reservoir from June 1979 to June 1980. The fishes inhabited the intake area of the reservoir during the summer (temperature range, 27.5 – 31.5˚ C) and the discharge area during the winter (temperature range, 4.5 – 31.5˚C). In the spring and fall, the fishes were located throughout the reservoir (temperature range, 12.0 – 28.5˚C). Highest rates of movement for the esocids were recorded during the spring (675 – 1,100 m/day). The lowest rates were recorded during late …
Accelerated Mahaweli Programme (Amp) And Dry Zone Development: Some Aspects Of Settlement : Report Number Three, Thayer Scudder, Institute For Development Anthropology (Binghamton, N.Y.)
Accelerated Mahaweli Programme (Amp) And Dry Zone Development: Some Aspects Of Settlement : Report Number Three, Thayer Scudder, Institute For Development Anthropology (Binghamton, N.Y.)
Institute for Development Anthropology Papers
No abstract provided.
The Probe, Issue 10 - January 1981
The Probe, Issue 10 - January 1981
The Probe: Newsletter of the National Animal Damage Control Association
Contents: The Users of Wildlife Rabies Update Disney World, District of Columbia AGRICULTURAL CHEMICALS BOOK III - Fumigants, Growth regulators, Repellents and Rodenticides Japan has ADC Problems too Bird Species RPAR on Strychnine 1981 NADCA Membership List Muskrat Meatloaf Ol’ Timer’s Corner: Lee Bacus
Tracing Kepone Contamination In James Estuary Sediments, Maynard M. Nichols, Norman H. Cutshall
Tracing Kepone Contamination In James Estuary Sediments, Maynard M. Nichols, Norman H. Cutshall
VIMS Articles
The escape of Kepone into the James River estuary, Virginia, for more than nine years produced widespread contamination of the sediments with important ecological consequences. The pollutant extended seaward more than 100 km from its source and contaminated an estimated 31 million tonnes of sediment to depths of more than 60 cm. Kepone spread through the food chain and to every segment of the environment from marshes to the channel floor.
Kepone escaped mainly during high river inflow from a point source in freshwater tributaries. Near the source Kepone is associated with organic material but in the low er estuary …
Simulating The Water Requirements And Economic Feasibility Of Corn In The Midwest, Wendi L. Palmer, B. J. Barfield, M. E. Bitzer, C. T. Haan
Simulating The Water Requirements And Economic Feasibility Of Corn In The Midwest, Wendi L. Palmer, B. J. Barfield, M. E. Bitzer, C. T. Haan
KWRRI Research Reports
An evaluation of the economics of supplemental irrigation when using a surface water supply must be site specific in order to account for variations in soil moisture holding capacity, watershed area supplying the runoff, climatic conditions, and proposed irrigation management procedures.
With the use of farm specific simulation models to determine grain yields, availability of irrigation water, and economic expenditures involved in irrigation, an economic evaluation of supplemental irrigation can be performed, In the model presented in this report, the Duncan SIMAIZ model is used to predict grain yields using long-term daily weather information. SIMAIZ also determines irrigation water demand …
Development And Application Of An Index To Assess Nutrient Enrichment In Estuaries : A Report To The Chesapeake Bay Program, U. S. Environmental Protection Agency, Bruce J. Neilson
Development And Application Of An Index To Assess Nutrient Enrichment In Estuaries : A Report To The Chesapeake Bay Program, U. S. Environmental Protection Agency, Bruce J. Neilson
Reports
An index is 11 something used or serving to point out", "a guide", "a sign, token or indication" (.14) +. Indexes* such as those used in books, magazines and newspapers are not the subject of this study. Rather we are concerned with the use of indexes in technical fields. Even these are encountered often in everyday life. For example, a recent front-page newspaper article noted that "the government's index designed to forecast future economic trends dropped .... after rising for six straight months". An editorial column in the same issue addressed the use of "the existing Consumer Price Index as …
A Preliminary Study Of Community Oxygen Metabolism In The Vicinity Of The C. P. Crane Electric Power Generating Station : Final Report, Paul L. Zubkoff
A Preliminary Study Of Community Oxygen Metabolism In The Vicinity Of The C. P. Crane Electric Power Generating Station : Final Report, Paul L. Zubkoff
Reports
The community metabolism of the waters in the vicinity of C. P. Crane electric power generating station is reported for two seasonal periods in 1979. The early autumn period (October) is generally characterized by warm water temperatures (20°C) and an insolation period of 11 hours; the late autumn period (December) is generally characterized by cold water temperatures (4-6°C) and an insolation period of approximately 9 hours. Both sets of observations, were taken during periods which were significantly influenced by winds. ... more.
Book Review. For Whom The National Parks?, A. Dan Tarlock
Book Review. For Whom The National Parks?, A. Dan Tarlock
Articles by Maurer Faculty
No abstract provided.
A Pleistocene Sand Sea On The Alaskan Arctic Coastal Plain, L. David Carter
A Pleistocene Sand Sea On The Alaskan Arctic Coastal Plain, L. David Carter
United States Geological Survey: Staff Publications
A ridge and thermokarst-basin landscape that is strikingly portrayed in Landsat winter imagery consists of large Pleistocene dunes that have been modified by younger eolian activity and thermokarst processes. This is the most extensive area of large stabilized dunes yet reported in the North American Arctic; the landscape is ofparticular interest because it has been proposed as a$rst-order analog for martian fretted terrain. Recognition of the large dunes permits a new interpretation for linear and curvilinear trends visible in Landsat summer imagery.
Ethical Aspects Of Chesapeake Bay Use, Ann Hayward Rooney-Char, Maurice P. Lynch
Ethical Aspects Of Chesapeake Bay Use, Ann Hayward Rooney-Char, Maurice P. Lynch
VIMS Books and Book Chapters
No abstract provided.
Nonpoint Sources And Impacts In A Small Coastal Plain Estuary: A Case Study Of The Ware River Basin, Virginia, Gary F. Anderson, Cindy Bosco
Nonpoint Sources And Impacts In A Small Coastal Plain Estuary: A Case Study Of The Ware River Basin, Virginia, Gary F. Anderson, Cindy Bosco
VIMS Books and Book Chapters
The Ware River Study is one of five small watershed projects sponsored by the EPA Chesapeake Bay Program. These projects are designed to provide data on nutrient and organic loadings entering the Bay over the wide range of topographies, climates, and land uses which occupy its watershed. Each provides information on a particular geographic segment of the Bay region. In particular, the Ware study is intended to document special characteristics of runoff from low relief coastal plain environments, and to document their impacts on a small estuarine receiving water.
U.S. Army Corps Of Engineers Public Interest Review: An Evaluation Of Implementation Effectiveness, Sharon Kelberg
U.S. Army Corps Of Engineers Public Interest Review: An Evaluation Of Implementation Effectiveness, Sharon Kelberg
Marine Affairs Theses and Major Papers
The U.S. Army Corps of Engineers is authorized to permit or deny dredge and fill activities in the nation's coastal and wetland regions. Originally, responsible only for the maintenance of navigation, the Corps considered only navigational requirements in decisions to grant or deny permits. Now, however, the Corps must demonstrate, that the "public interest" is served as well. This study examines the scope of the public interest and attempts to evaluate the effectiveness of the program in a particularly controversial project. The initial phase provides evaluation criteria necessary to analyze the application of the public interest review. The second phase …
Trace Metal Pollution In Narragansett Bay: A Case Study Of The Rhode Island Quahog Fishery, Scott W. Horsley
Trace Metal Pollution In Narragansett Bay: A Case Study Of The Rhode Island Quahog Fishery, Scott W. Horsley
Marine Affairs Theses and Major Papers
This paper was written with two objectives in mind: to provide information relevant to the protection of the quahog fishery and the protection of human health. Both are threatened as hundreds of millions of gallons of industrial effluents and sewage treatment plant discharges enter Narragansett Bay daily. The implications of trace metal pollution with respect to the quahog fishery have received little attention to date. The purpose of this paper is to assemble scientific, legal, and socioeconomic information in a fashion which will direct future research and management attempts in an effective manner.
A Comparison Of Global Conventions Concerned With Controlling Ship-Borne Pollution On The High Seas, Robert F. Ogurek
A Comparison Of Global Conventions Concerned With Controlling Ship-Borne Pollution On The High Seas, Robert F. Ogurek
Marine Affairs Theses and Major Papers
This paper will compare the global conventions concerned with controlling ship-borne pollution, noting the major differences in regulations concerned with the prevention, control and reporting of pollution incidents, as well as the enforcement provisions of these conventions. Section I of this paper will be a discussion of the provisions made in the Third United Nations Conference on the Law of the Sea Draft Convention on the Law of the Sea (not yet in force) concerning ship-borne pollution. Section II will be a discussion of the major global conventions, both those presently in force and those yet to enter into force, …
Beach Protection And Restoral Techniques And Their Application To The Rhode Island Coast, Dennis J. Stockwell
Beach Protection And Restoral Techniques And Their Application To The Rhode Island Coast, Dennis J. Stockwell
Marine Affairs Theses and Major Papers
It is the purpose of this paper to investigate the techniques and designs for beach protection today, and to show that efforts are largely motivated by the economic value involved. The primary cause of beach erosion will be addressed through a discussion of coastal processes. The construction and purposes of the common engineering structures will be explored along with examples of the materials presently being used. The east-coast beaches of Florida with their traditional recreational lure will provide good examples of large-scale efforts to protect high-cost waterfront investments. Rhode Island shoreline varies considerably along its length and is also chiefly …
Auctions As An Alternate Method Of Selling Fish In New England, Martin J. Vincent
Auctions As An Alternate Method Of Selling Fish In New England, Martin J. Vincent
Marine Affairs Theses and Major Papers
Selling fish at the landings stage by auction, as opposed to the current practices of selling to middlemen and through cooperatives, has been proposed by several authors. They suggest that fishermen would receive higher prices and that auction competition would improve fish quality.The aim of this study was to compile the rules and procedures of existing fish auctions, and to explore their effect on price formation. This would provide a basis for any who wished to determine the applicability of fish auctions in particular ports. While the findings are relevant to all fish auctions, special emphasis was placed on the …
Regional Planning On The South Shore: A Proposal For Improving Coastal Resources Management In Rhode Island, Thomas R. Ouellette
Regional Planning On The South Shore: A Proposal For Improving Coastal Resources Management In Rhode Island, Thomas R. Ouellette
Marine Affairs Theses and Major Papers
The Rhode Island coast is distinguished by estuaries and brackish ponds, sand dunes and barrier beaches, fertile agricultural soils and productive wildlife habitats. The state's coastal zone includes both the urban waterfront of Providence and the traditional rural environment of Washing and Newport Counties. Because of Rhode Island's small area (less than that of the average county in the United States: and high population density, the state's shoreline is in great demand by nearly all of its residents. Many are either dependent economically upon, or enjoy the recreational use of, the resources of the coast. However, the people of Rhode …
A High School Curriculum In Marine Environmental Issues: "The Sea - Use And Abuse" Part Ii, Martha J. Zimmerman
A High School Curriculum In Marine Environmental Issues: "The Sea - Use And Abuse" Part Ii, Martha J. Zimmerman
Marine Affairs Theses and Major Papers
To the Student: As we progress into the 1980's, you will become more aware of a number of marine related environmental issues. Many of these complex marine issues will be decided within the political sphere of our society. These are not isolated issues, but rather complicated ones which impact a wide section of our economic and social lives. The issues we are discussing include: land use (especially in the coastal zone), the city of facilities (e.g. sewer treatment plants, power plants, nuclear power plants), and the drilling for oil and gas and minerals on submerged and continental shelf areas. Port …
A High School Curriculum In Marine Environmental Issues: "The Sea - Use And Abuse" Part I, Martha J. Zimmerman
A High School Curriculum In Marine Environmental Issues: "The Sea - Use And Abuse" Part I, Martha J. Zimmerman
Marine Affairs Theses and Major Papers
To the Teacher: The materials presented and developed in this learning activity packet involve dynamic, complex, and persistent environmental issues concerning man's interaction with the oceans and the marine environment. As we progress into the 1980's, many decisions effecting the marine world will be made within the political sphere. These decisions will have wide-spreading impacts into the economic and social areas as well. Some consequences will be observed immediately, and others perhaps more serious, defiant of detection, and in some instances even hazardous, may have delayed results. The complex interrelationships of land and oceanic environments, the fragility of the marine …
Residential Development And Coastal Flood Plain Management In Rhode Island: Its History, Present Status And Future Options, William R. Gordon Jr.
Residential Development And Coastal Flood Plain Management In Rhode Island: Its History, Present Status And Future Options, William R. Gordon Jr.
Marine Affairs Theses and Major Papers
It is the objective of this major paper to examine and assess the present status and future orientation of flood plain management in Rhode Island. The primary focus of this paper will address floodproofing (Building Code Regulations) of structures as a preventative measure against flood damages. Floodproofing, as an exercise of local police power, is applicable to desired uses of the flood plain; such as residential, recreational and commercial structures. Emphasis will be extended to recreational and residential buildings.
Der Stand Der Hydrobiologischen Forschungen In Der Mongolischen Volksrepublik, Ayuur Dulmaa
Der Stand Der Hydrobiologischen Forschungen In Der Mongolischen Volksrepublik, Ayuur Dulmaa
Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298
Die Entwicklung der Hydrobiologie in der MVR vollzog sich unter ständiger Orientierung an den volkswirtschaftlichen Interessen des Landes. Deshalb wurde neben grundlegenden Forschungen zu Fauna und Ökologie der Gewässer besonderes Gewicht auf die Akklimutisierung von Nutzfischen gelegt. Die dazu notwendigen Kenntnisse der hydrobiologisch bisher weitgehend unerforschten Seen der Mongolei erbrachten mehrjährige Expeditionen in verschiedenen Gebieten des Landes. Den gemeinsamen Biologischen Chövsgöl-Expeditionen der Universitäten Irkutsk und Ulan-Balor kommt dabei eine besondere Rolle zu. Am See Chövsgöl entstand auch die erste hydrobiologische Station der MVR. Die rasche Entfaltung der Hydrobiologie in den letzten zwanzig Jahren dokumentiert eine Reihe bedeutender wissenschaftlicher Publikationen ebenso …
Growth And Survival Of Largemouth Bass In Newly Stocked South Dakota Impoundments, Clifton C. Stone
Growth And Survival Of Largemouth Bass In Newly Stocked South Dakota Impoundments, Clifton C. Stone
Electronic Theses and Dissertations
The present study was designed to evaluate the effect of five different stocking combinations and differences in climatic and morphological conditions within South Dakota on initial growth and survival of the largemouth bass (Micropertus salmoides). Forage species stocked with bass included gold shiners (Notemigonus crysoleucas), fathead minnow (Pimephales promelas), black bullhead (Ictalurus melas), and bluegill (Lepomis macrochirus). Bass only stocking was also evaluated. First eyar survival values for 16 eastern South Dakota ponds ranged from 1 to 100%, with a mean of 50.2%. Bass exhibited poorest survival when stocked with black bullheads. Analysis of variance indicated no significant difference (P …
Final Environmental Impact Statement, U.S. Department Of Housing And Urban Development
Final Environmental Impact Statement, U.S. Department Of Housing And Urban Development
Elusive Documents
No abstract provided.
Interior West Watershed Management, United States Department Of Agriculture, Forest Service
Interior West Watershed Management, United States Department Of Agriculture, Forest Service
Water
Habitat type classification systems are reviewed for potential use in watershed management. Information on climate, soils, and vegetation related to the classifications are discussed. Possible cooperative applications of vegetation and habitat type classifications to watershed management are explored.