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Articles 52171 - 52200 of 52353
Full-Text Articles in Physical Sciences and Mathematics
Biological Indices Of Water Pollution, With Special Reference To Fish Populations, Peter Doudoroff, Charles E. Warren
Biological Indices Of Water Pollution, With Special Reference To Fish Populations, Peter Doudoroff, Charles E. Warren
Other Publications in Wildlife Management
A number of investigators have very recently published discussions having to do with biological indices and biological measures of water pollution (1) (2) (7) (13) (14) (15) (16) (26) (27) (28) (29) (30) (36) (38). Fjerdingstad (12) has discussed some of the pertinent European literature. The fundamental concepts presented by these authors are not original, for the idea that aquatic organisms can be useful "indicators" of environmental conditions, and particularly of the degree of pollution of water with organic wastes, has a long history (12). Because of certain novel features and the relatively wide scope of the studies, and the …
Nebraska Deer, William Bailey Jr., George Schildman, Phillip Agee, C. G. Pritchard
Nebraska Deer, William Bailey Jr., George Schildman, Phillip Agee, C. G. Pritchard
Nebraska Game and Parks Commission: Publications
IN COMMON with the experience of most states, Nebraska's deer herds were reduced to a very low level by excessive harvests in our early history. Most American big-game animals were overharvested in the early history of this nation because of commercialization. Buffalo were killed for their hides, deer for their meat. This slaughter continued as long as the hunter (or poacher) could sell his take at a profit. Modem game management and public opinion reversed this trend. Deer are on the way back all over America, and in some states the protection-complex was so strong that deer were restored to …
Investigations Of The Effects On Oyster Culture Of The Dredging For The Hampton Roads Bridge-Tunnel : An Investigation Conducted By The Virginia Fisheries Laboratory For The Virginia State Department Of Highways, Jay D. Able, Dexter S. Haven, John L. Mchugh
Investigations Of The Effects On Oyster Culture Of The Dredging For The Hampton Roads Bridge-Tunnel : An Investigation Conducted By The Virginia Fisheries Laboratory For The Virginia State Department Of Highways, Jay D. Able, Dexter S. Haven, John L. Mchugh
Reports
No abstract provided.
Range Liverstock Nutrition And Its Importance In The Intermountain Region, C. Wayne Cook
Range Liverstock Nutrition And Its Importance In The Intermountain Region, C. Wayne Cook
Faculty Honor Lectures
It has been estimated that about 728 million acres or about 76 percent of the entire land area in the West is used for grazing (Stoddard and Smith 1956). In Utah about 93 percent of the land area or 48,900,000 acres is considered range land (Reuss and Blanch 1951). Although some of this range land is forested, a large area of it can be used only for grazing. Therefore, range livestock production is an important segment of western agriculture.
Before 19'00 most of the animals in the West grazed on the range all year. However, irrigation crop production has expanded …
Liming Of Bay 16 (1956), Walter A. Lawrance
Liming Of Bay 16 (1956), Walter A. Lawrance
Walter Lawrance Papers
No abstract provided.
Addition Of Sodium Nitrate (1956), Walter A. Lawrance
Addition Of Sodium Nitrate (1956), Walter A. Lawrance
Walter Lawrance Papers
No abstract provided.
Analytical Data (1956), Walter A. Lawrance
Analytical Data (1956), Walter A. Lawrance
Walter Lawrance Papers
No abstract provided.
Press Reports (1956), Walter A. Lawrance
Odor Report (1956), Walter A. Lawrance
Stream Pollution- Aquatic Macro-Invertebrate Communities As Indicators Of Organic Pollution In Lytle Creek, Arden R. Gaufin, Clarence M. Tarzwell
Stream Pollution- Aquatic Macro-Invertebrate Communities As Indicators Of Organic Pollution In Lytle Creek, Arden R. Gaufin, Clarence M. Tarzwell
United States Environmental Protection Agency: Publications
Year-round field studies of the com position and ecology of stream communities associated with the purification of organic wastes in streams were initiated on Lytle Creek in October, 1949. This creek, which is located about 45 miles northeast of Cincinnati, Ohio, is a tributary of the Little Miami River. Its drainage basin comprises 27 sq. mi., a third of which is contained within the city limits of Wilmington, Ohio, a city of some 7,412 persons
East Cache Project: Idaho And Utah, Bureau Of Reclamation; Region 4; United States
East Cache Project: Idaho And Utah, Bureau Of Reclamation; Region 4; United States
Elusive Documents
No abstract provided.
1956- Spring Pheasant Inventory, Dan Heyl
1956- Spring Pheasant Inventory, Dan Heyl
Nebraska Game and Parks Commission: White Papers, Conference Presentations, and Manuscripts
Objectives:
To determine pheasant breeding population trends.
Gathering Of The Hunting Season Data 1956, Max Hamilton, Phil Agee
Gathering Of The Hunting Season Data 1956, Max Hamilton, Phil Agee
Nebraska Game and Parks Commission: White Papers, Conference Presentations, and Manuscripts
To obtain information relative to the harvest of pheasants on the three study areas at Harvard, Clay Center and Fairmont.
Long Range Data (1955), Walter A. Lawrance
Long Range Data (1955), Walter A. Lawrance
Walter Lawrance Papers
No abstract provided.
Odor Report (1955), Walter A. Lawrance
Addition Of Sodium Nitrate (1955), Walter A. Lawrance
Addition Of Sodium Nitrate (1955), Walter A. Lawrance
Walter Lawrance Papers
No abstract provided.
Analytical Data (1955), Walter A. Lawrance
Analytical Data (1955), Walter A. Lawrance
Walter Lawrance Papers
No abstract provided.
Special Projects (1955), Walter A. Lawrance
Special Projects (1955), Walter A. Lawrance
Walter Lawrance Papers
No abstract provided.
Press Reports (1955), Walter A. Lawrance
A Management Study Of The Cache Elk Herd, Norman V. Hancock
A Management Study Of The Cache Elk Herd, Norman V. Hancock
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
American elk, by virtue of their distribution, were the most cosmopolitan members of the cervid family at the time of white settlement of North America. At this early date elk were present in every major region of what is now continental United States, as well as in northern Mexico. they likewise were abundant in upper and lower Canada, though records do Lot corroborate their presence too far north on the Atlantic coast. Although generally existent throughout the western states, elk were sparsely distributed in Nevada, southern Utah, and most of Arizona and New Mexico. Paucity of elk was also noted …
Industrial Wastes, Charles E. Renn
Industrial Wastes, Charles E. Renn
United States Environmental Protection Agency: Publications
This paper presents a summary of experiences with a variety of cyanogenic wastes. The work has attempted to evaluate the interaction of waste bearing waters and the environment in terms of waste disposal design requirements. In this, the approach is somewhat more critical than that commonly taken by fisheries biologists, conservationists, and others who have been concerned with the "preventive" aspects of waste disposal.
The first phases of the work were designed to discover the tolerable limits of certain waste components to fresh water fish. This was undertaken in 1950; in the interval the composition of the wastes has been …
Report On Investigation Of Bear River System, Public Services
Report On Investigation Of Bear River System, Public Services
Elusive Documents
In October 1952 the U. S~ Public Health Service, under provisions of Public l.aw 845 (80th Congress) J prepared a "Report on Interstate Pollution in the Bear River Watershed," with the assistance of the coming, Idaho, and Utah state water pollution control authorities. Included in this report was a description of the area and waters involved, data on stream flows, water uses, pollution contributed, effects of pollution, and a discussion of the existing authority of the States of Wyoming, Idaho, and Utah for enforcement of pollution control.
Amount And Chemical Composition Of The Organic Matter Contributed By Overstory And Understory Vegetation To Forest Soil, David Robert Main Scott
Amount And Chemical Composition Of The Organic Matter Contributed By Overstory And Understory Vegetation To Forest Soil, David Robert Main Scott
Yale School of the Environment Bulletin Series
No abstract provided.
Some Chemical Changes Resulting From Industrial Waste Disposal In The Ouachita River, Carl E. Hoffman
Some Chemical Changes Resulting From Industrial Waste Disposal In The Ouachita River, Carl E. Hoffman
Journal of the Arkansas Academy of Science
No abstract provided.
Birds Of Jasper National Park, Alberta, Canada, Ian Mctaggart Cowan
Birds Of Jasper National Park, Alberta, Canada, Ian Mctaggart Cowan
Other Publications in Wildlife Management
Jasper Park, with an area of approximately 4,200 square miles, is the largest accessible primeval wildlife sanctuary on this continent and as such its bird life is of the greatest interest. The meagre available records of earlier conditions indicate that noteworthy changes in the park's avifauna have taken place in the last 50 years. There can be little doubt that other changes will take place during the years to come. For this reason, then, if for no other, it seems desirable that as complete a record as possible of the current situation be made, for only against it can the …
Birds Of Jasper National Park, Alberta, Canada, Ian Mctaggart Cowan
Birds Of Jasper National Park, Alberta, Canada, Ian Mctaggart Cowan
Other Publications in Wildlife Management
Jasper Park, with an area of approximately 4 200 square miles, is the largest accessible primeval wildlife sanctuary on this continent and as such its bird lite is of the greatest interest. The meagre available records of earlier conditions indicate that noteworthy changes in the park's avifauna have taken place in the last ,0 years. There can be little doubt that other changes will take place during the years to come. For this reason, then, if tor no other, it seems desirable that as complete a record as possible of the current situation be made, for only against it can …
Measurement Of Irrigation Water, Eldon M. Stock
Measurement Of Irrigation Water, Eldon M. Stock
Reports
Foreword: Although irrigation has been practiced in Utah for more than one hundred years, irrigation water still is being distributed to farmers with little or not thought about its measurement. A farmer would not think of buying or selling other farm commodities, such as hay, grain, beef cattle, or dairy products, without weighing or accurately measuring them, but at the same time he is often content to accept and pay for the irrigation water received with little or no knowledge as to the actual amount received, or whether or not he is receiving the amount he is entitled to. Measurement …
Rural Mail Carrier Survey- Spring 1955, Dan Heyl, J. Henry Sather
Rural Mail Carrier Survey- Spring 1955, Dan Heyl, J. Henry Sather
Nebraska Game and Parks Commission: White Papers, Conference Presentations, and Manuscripts
To obtain extensive population data on pheasants, sharp-tailed grouse, prairie chickens, bobwhite quail, and deer.
1956- Rural Mail Carrier Survey, Dan Heyl
1956- Rural Mail Carrier Survey, Dan Heyl
Nebraska Game and Parks Commission: White Papers, Conference Presentations, and Manuscripts
Objectives:
1. To evaluate pheasant hatching success.
2. To obtain extensive data pertaining to pre-hunting season population trends.
Why Doesn't Such-And-Such A Game Bird Do Well In Nebraska?, Levi Mohler
Why Doesn't Such-And-Such A Game Bird Do Well In Nebraska?, Levi Mohler
Nebraska Game and Parks Commission: White Papers, Conference Presentations, and Manuscripts
Why doesn't such-and-such game bird do well in Nebraska? This is a question which is often asked field workers for the game department. The answer to such an inquiry varies with the bird in question, but in general the following applies: Since climate, topography, and natural foods vary so much from place to place, and since most individual species are not highly adaptable, nature has through the centuries evolved many species, or kinds, of birds, each species adapted to meet certain conditions. Some of these have extensive ranges; others are limited in their distribution. The conditions suited to one species …