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Articles 17221 - 17250 of 18618
Full-Text Articles in Entire DC Network
The Distribution And Relative Abundance Of Aquatic Oligochaeta In The Upper Cache River System, Southern Illinois, In Relation To Water Quality, Mark Julian Wetzel
The Distribution And Relative Abundance Of Aquatic Oligochaeta In The Upper Cache River System, Southern Illinois, In Relation To Water Quality, Mark Julian Wetzel
Masters Theses
Species composition, distribution, abundance, and water quality relationships of aquatic oligochaetes occurring in the upper Cache River system, southern Illinois were investigated. Forty-two taxa of oligochaetes including 16 naidids, 22 tubificids and representatives of the families Aeolosomatidae, Branchiobdellidae, Enchytraeidae, and Lumbriculidae were collected. Four species of oligochaetes new to Illinois, Limnodrilus psammophilus Loden, L. rubripenis Loden, Psammoryctides (Spencerius) californianus Brinkhurst, and Haemonais waldvogeli Bretscher were collected during this study. Another species of Limnodrilus new to science is reported here, as yet undescribed. The thesis that aquatic oligochaetes can be used as true water quality indicator organisms is rejected. It is …
A Survey And Evaluation Of Shallow Groundwater Contamination Hazards In The State Of Utah, Edward P. Fisk, Calvin G. Clyde
A Survey And Evaluation Of Shallow Groundwater Contamination Hazards In The State Of Utah, Edward P. Fisk, Calvin G. Clyde
Reports
A survey was made to appraise current man-made contamination of shallow groundwater in Utah. Very little has been published on the subject, and most of the information was obtained by personal observation and through interviews of individuals concerned with water quality protection in Utah. After presenting the relevant physiographic, geologic, and hydrologic characteristics of the various regions of Utah and discussing how these relate to groundwater contamination in general, representative groundwater quality hazards in 32 sites or regions in Utah are presented. A very wide range of hazards to groundwater quality was found to exist. These cases cover the range …
Volume 4, Number 12 (December 1980), The Solar Ocean Energy Liaison
Volume 4, Number 12 (December 1980), The Solar Ocean Energy Liaison
The OTEC Liaison
No abstract provided.
Bulletin 3929 - Irrigation In Western Australia, K S. Cole
Bulletin 3929 - Irrigation In Western Australia, K S. Cole
Bulletins - 3000 - 3999
Irrigation is essential in many parts of the world to produce essential food and profitable cash crops. Generally, those areas of land with less than 360 mm of rain spread over a distinct wet season of several months cannot grow crops for food or cash on rainfall alone. Then irrigation becomes necessary unless some peculiarity such as an oasis exists.
Methods For Biological, Chemical, And Physical Analyses In Reservoirs, Penelope E. Kellar, Sherell A. Paulson, Larry J. Paulson
Methods For Biological, Chemical, And Physical Analyses In Reservoirs, Penelope E. Kellar, Sherell A. Paulson, Larry J. Paulson
Publications (WR)
This manual contains detailed descriptions of biological, chemical and physical sampling and analytical procedures used at the Lake Mead Limnological Research Center. The manual was prepared in response to requests made by numerous individuals involved in the Las Vegas Valley Water Quality Program. This manual represents what we consider to be a reasonably complete compilation of methods useful in studying both general and specific limnological questions. While each section is sufficiently detailed to be of use to investigators with little experience in limnological methodology, the methods can be used on a wide variety of lakes and reservoirs, with relatively little …
Vegetative Community Descriptions For The North Platte River In Wyoming And Nebraska, Lynn Fisher
Vegetative Community Descriptions For The North Platte River In Wyoming And Nebraska, Lynn Fisher
Nebraska Game and Parks Commission: White Papers, Conference Presentations, and Manuscripts
A description of the vegetative communities in an area will provide an insight to wildlife potential and use of that area. Wildlife and its corresponding habitat are recognized as important for recreation and to the overall environmental quality of an area. The Water and Power Resources Service, Lower Missouri Region, is presently engaged in a study of the Platte River Basin, including an evaluation of wildlife habitat and associated environmental needs. Quantification of wildlife habitat along the South Platte River has been completed. Vegetation communities were described and habitat maps were prepared from color infrared aerial photographs (scale – 1:24,000). …
The Probe, Issue 9 - November 1980
The Probe, Issue 9 - November 1980
The Probe: Newsletter of the National Animal Damage Control Association
Contents: Cecil D. Andrus, lawsuit All Together Now – Let’s Sue Andrus desert tortoise Treasury Reports Ken Green of Avitrol Corporation has an article in PEST CONTROL Black-footed ferret A new social disease, "coyotitis" The Brotherhood Rats Regulation Scoreboard: Government 80 : Taxpayer 0 Coleman Company has just introduced a little gadget Ol’ Timer’s Corner: Walt Boehm, Virgil Parsons, Mark Worcester NRA Hunting Annual Wildlife Legislative Fund of America Blueberries added to the list of fruits that can be sprayed with MESUROL TRAPPING BENEFITS PEOPLE AND WILD ANIMALS William D. Fitzwater
Full Food And Fiber Production, James D. Atwood
Full Food And Fiber Production, James D. Atwood
UMR-MEC Conference on Energy / UMR-DNR Conference on Energy
Included in the Natural Gas Policy Act of 1978 is a section which provides priority treatment for essential agricultural users. The applicability and importance of this Act in maintaining a viable agricultural base in this nation is developed.
Wood Fuels In Power Generation, Yildirim Omurtag, Larry Wetzel, Michael Mcevilly
Wood Fuels In Power Generation, Yildirim Omurtag, Larry Wetzel, Michael Mcevilly
UMR-MEC Conference on Energy / UMR-DNR Conference on Energy
In order for wood to be considered a feasible energy source for power generation, it must prove to be economical, meet society's pollution criteria, and provide sufficient energy to meet its regional demand applications or requirements. This report looks at wood's availability, its potential as a fuel source, the different methods of energy conversion, and lastly, submits conclusions and recommendations concerning wood-fueled power generation.
The information and background was supplied and supported by actual application, government publications and documentations, and other sources. The availability report includes living biomass, wood residues, and potential biomass expansion. Once availability was determined, the portion …
10 Kw Per Capita, Harry A. Brown
10 Kw Per Capita, Harry A. Brown
UMR-MEC Conference on Energy / UMR-DNR Conference on Energy
The rate of energy use in the U.S. is discussed. Possible savings in the principal areas of use are considered. The conclusion is that significant reductions could be made in five to ten years without new technology, but are not likely under present conditions.
Economics, Politics And The Future Supply Of Energy Sources, Raphael Shen
Economics, Politics And The Future Supply Of Energy Sources, Raphael Shen
UMR-MEC Conference on Energy / UMR-DNR Conference on Energy
High degree forward linkages created by oil and natural gas consumption was sufficient "justification" to regulate energy prices. The "welfare triangle" was artificially enlarged, and the economy as a whole indeed reaped benefits therefrom. It was workable, then. But the economy has since been experiencing macroeconomic dislocations. To avoid future payments of current policy mistakes, to ensure continued and steady economic growth, and to assure future energy adequacy/ abundance, enhanced investment incentives are rational imperatives that merit serious consideration.
The Prairie Naturalist Volume 12, Numbers 3 And 4. September–December 1980
The Prairie Naturalist Volume 12, Numbers 3 And 4. September–December 1980
The Prairie Naturalist
THE FLORA AND SANDHILLS PRAIRIE COMMUNITIES OF ARAPAHO PRAIRIE, ARTHUR COUNTY, NEBRASKA ▪ K. H. Keeler, A. T. Harrison and L. S. Vescio
USE OF ULTRASONIC SOUND TO ESTIMATE BODY FAT DEPOTS IN THE MALLARD ▪ G. A. Baldassarre, R. J. Whyte and E. G. Bolen
NORTHERN MOCKINGBIRD BREEDING IN NORTH DAKOTA ▪ D. Child, J. Fontaine, T. Gatz, M. Johnson and J. Oswald
SPRING ARRIVAL OF BIRDS AT WOODWORTH, NORTH DAKOTA ▪ K. F. Higgins, L. M. Kirsch, and J. M. Callow
HYBRIDIZATION AND TAXONOMIC STATUS OF GREATER PRAIRIE CHICKENS AND SHARP-TAILED GROUSE (HYBRIDIZATION IN GROUSE) ▪ D. W. …
Litter Production And Nutrient Content Of Litter In The Seasonally Flooded Dismal Swamp, Marta M. Gomez
Litter Production And Nutrient Content Of Litter In The Seasonally Flooded Dismal Swamp, Marta M. Gomez
Biological Sciences Theses & Dissertations
Litter production was studied in four plant communities in the Great Dismal Swamp, Virginia, that differ primarily in species composition and flooding regime. Greatest leaf deposition occurred in the more flooded communities, maple-gum (Acer-Nyssa) with 536 g m-2 yr-1 and cypress (Taxodium distichum (L.) Richard) with 528 g m-2 yr-1, followed by the cedar (Chamaecyparis thyoides (L.) BSP) and mixed hardwood (Quercus-Acer-Nyssa-Liquidambar) communities with 506 g m-2 yr-1 and 455 g m-2 yr-1, respectively. Litter nutrient concentrations were generally higher in the cypress and maple-gum stands, indicating greater nutrient availability …
Epa Profile Of Environmental Quality Nebraska, Kathleen Q. Camin
Epa Profile Of Environmental Quality Nebraska, Kathleen Q. Camin
United States Environmental Protection Agency: Publications
Nebraska, Iowa, Kansas, and Missouri, which make up EPA Region VII, are among the leading corn and wheat producing States in the Nation_ These States also produce a significant share of the soybean, grain sorghum, fat cattle, and finished hogs that are supplied to American and foreign markets.
Although the States in Region VII can best be characterized as rural, 65 percent of their nearly 12 million people live in urban areas. In Nebraska, metropolitan areas such as Omaha 4 have environmental problems resulting from major industrial operations, municipal services, transportation, and energy production. Metropolitan areas, however, do not have …
The Probe, Issue 8 - September 1980
The Probe, Issue 8 - September 1980
The Probe: Newsletter of the National Animal Damage Control Association
Contents: Probing for the Probe Who says ADC doesn’t cover the waterfront!? And the Dumps Too! U.S. Fish and Wildlife Service Animal Damage Control Activities (Operational and Extension) Bats Steel Leg Hold Live Trap by Milton Caroline Ol’Timer’s Corner: Cliff Presnall EPA Key to Post Mortem Symptoms Some Coyotes Can’t Wait Animal Rights by Homer S. Ford Seen any Black-footed Ferrets Recently? William D. Fitzwater
Mass Marking Of Mosquitofish: Preliminary Results, Bruce Vondracek, Wayne A. Wurtsbaugh, Joseph J. Cech Jr.
Mass Marking Of Mosquitofish: Preliminary Results, Bruce Vondracek, Wayne A. Wurtsbaugh, Joseph J. Cech Jr.
Watershed Sciences Faculty Publications
Three marking techniques were tested to determine their applicability for mosquitofish. Tetracycline drugs and DC Ar administered in the diet successfully marked laboratory-cultured mosquitofish, but exposure to direct sunlight in outdoor tanks resulted in the rapid disappearance of the marks. Preliminary data on fluorescent marks from a polystyrene pigment in a melamine-sulfonamide-formaldehyde resin forced into the dermal ,tissue with compressed air are more promising.
A t an optimal deliver pressure of 7.3 m Hg (140 p.s.i.) and spraying time of 15 sec., marking percentage is maximized and fish mortality is minimized. Mark retention time was up to 80 days in …
Effect Of Fish Size On Prey Size Selection In Gambusia Affinis, Wayne A. Wurtsbaugh, Joseph J. Cech Jr., James Compton
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 …
A Five Year Water Research Plan For The State Of Arkansas, Robert E. Babcock
A Five Year Water Research Plan For The State Of Arkansas, Robert E. Babcock
Arkansas Water Resources Center Technical Reports
The present economy and quality of life in Arkansas have largely been determined by our natural resources and the way they have been used. Likewise, insuring a sound economic future and a healthful environment in the state will depend on the efficiency and the wisdom with which nature's gifts are managed in the future. As the state's population grows and places new demands on finite resources, the need for effective resource management becomes increasingly critical. Often, a history of plenty can lead to the belated recognition of emerging resource problems. In Arkansas, such is the case with the state's water …
Technical And Legal Considerations Immanent In The Disposal Of Commercial Nuclear Waste, Margaret D. Davidson
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 …
State Of The Fisheries Report 1979, Department Of Fisheries And Wildlife, Western Australia
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.
Environmental Quality 1979 - Hillsborough County Florida, Hillsborough County Environmental Protection Commission
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, 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
Volume 4, Number 6 (June 1980), The Solar Ocean Energy Liaison
Volume 4, Number 6 (June 1980), The Solar Ocean Energy Liaison
The OTEC Liaison
No abstract provided.
Bulletin No. 25: Salt Marsh Plants Of Connecticut, William A. Niering, Scott Warren
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 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
Volume 4, Number 5 (May 1980), The Solar Ocean Energy Liaison
Volume 4, Number 5 (May 1980), The Solar Ocean Energy Liaison
The OTEC Liaison
No abstract provided.
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 elementgood 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
Production Of Mountain Whitefish (Prosopium Williamsoni) In Altered And Unaltered Reaches Of Two Intermountain Streams In Their Alluvial Flood Plains, Michael J. Ottenbacher
Production Of Mountain Whitefish (Prosopium Williamsoni) In Altered And Unaltered Reaches Of Two Intermountain Streams In Their Alluvial Flood Plains, Michael J. Ottenbacher
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Estimates of production and related parameters (growth rate, density, standing crop) were made for populations of mountain whitefish in altered and "unaltered" areas of the Blacksmith Fork and Logan River, Utah from spring 1975 through summer 1976. Capture records of marked whitefish were also analyzed to describe fish movement and check on assumptions implicit in the population estimator.
Mean weights and instantaneous growth rates of whitefish were similar at all sites for comparable size/age groups. Among sites, differences in production per sampling interval and annual production were due mainly to differences in standing crop and/or age structure.
Estimates of mountain …
Resource Partitioning In Breeding Populations Of Marsh Hawks And Short-Eared Owls, Susan C. Linner
Resource Partitioning In Breeding Populations Of Marsh Hawks And Short-Eared Owls, Susan C. Linner
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
During the 1979 breeding season four pairs of northern harriers, or marsh hawks (Circus cyaneus) and four pairs of short-eared owls (Asio flammeus) were studied in Cache Valley, Utah. The study was concerned solely with diurnal resource utilization, and did not examine the owls' nocturnal activities. The home range of each harrier pair overlapped substantially with that of an owl pair. Percent habitat overlap for hawk-owl pairs varied from 39 percent to 72 percent. Observations were made to determine if differences existed in their utilization of habitat and food resources, or in their daily and seasonal …
Effects Of Host Plant Patch Size And Surrounding Plant Type On Insect Population Dynamics, Lynn A. Maguire
Effects Of Host Plant Patch Size And Surrounding Plant Type On Insect Population Dynamics, Lynn A. Maguire
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The purpose of the present study was to investigate how plant spatial patterns and insect behavior interact to influence the population dynamics of insects using the plants. The study included three phases: l) field experiments using collards (Brassica oleracea) and the crucifer insect fauna; 2) simulation models representing the population dynamics of an insect herbivore as functions of insect dispersal behavior and host plant patch size; and 3) model-field syntheses integrating model predictions and field variability estimates to choose an appropriate spatial scale for future field experiments or applications.
In field experiments on surrounding plant type, collards were …