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Articles 21091 - 21120 of 22660
Full-Text Articles in Entire DC Network
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
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
Influence Of Las Vegas Wash Density Current On Nutrient Availability And Phytoplankton Growth In Lake Mead, John R. Baker, Larry J. Paulson
Influence Of Las Vegas Wash Density Current On Nutrient Availability And Phytoplankton Growth In Lake Mead, John R. Baker, Larry J. Paulson
Publications (WR)
Density currents are commonly formed in reservoirs because of temperature or salinity induced density differences between inflowing and receiving waters. Anderson and Pritchard (1951) were among the first to demonstrate this in their investigations of density currents in Lake Mead. They found that the Colorado River formed an underflow in Lake Mead during the winter, an overflow in the spring and an interflow in the summer and fall. Wunderlich and Elder (1973) have since described the hydromechanics of these types of flow patterns, and density currents have been reported for several other large reservoirs (Carmack et al. 1979, Johnson and …
Nutrient Interactions Among Reservoirs On The Colorado River, Larry J. Paulson, John R. Baker
Nutrient Interactions Among Reservoirs On The Colorado River, Larry J. Paulson, John R. Baker
Publications (WR)
Interactions among physical, chemical and biological processes in reservoirs can significantly alter the characteristics of the discharge (Neel 1963, Wright 1967, Hannan 1979) that, in turn, can influence the ecology of the river downstream .(Ward and Stanford 1979). Investigations of the Colorado River, system reveal that reservoir-induced changes in the river can also affect downstream reservoirs. The formation of Lake Powell, in 1963 was accompanied by reductions in suspended sediment and nutrient loading and changes in the seasonal temperature and discharge cycles of the Colorado River. In this paper, we evaluate how these changes have influenced the nutrient and trophic …
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
Water Current, Volume 12, No. 3, May/June 1980
Water Current, Volume 12, No. 3, May/June 1980
Water Current Newsletter
From the Desk of the Director
Change of Address
Staff Members Resign
MRBC Adopts Regional Water Plan
Nebraska Game and Parks Commission
Mandatory Best Management Practices for New Federal Irrigation Projects in Nebraska
USGS FY 1981 Budget Request Cut $6.3 Million
WRC Completes Fiscal Year 1980 Grants to States
NSF Announces Anti-Inflation Budget for FY 1981
EPA Soliciation for Proposals
Chlorophyll Fluorescence Probe Of Ultraviolet-B Photoinhibition Of Primary Photoreactions In Intact Leaves, Robert S. Nowak
Chlorophyll Fluorescence Probe Of Ultraviolet-B Photoinhibition Of Primary Photoreactions In Intact Leaves, Robert S. Nowak
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Damage to primary photosynthetic reactions caused by environmental stress can be assessed by measurement of chlorophyll fluorescence induction in intact leaves. This approach was applied in studies of ultraviolet-B photoinhibition of photosynthesis in Pisum sativum L. and Rumex patientia L. leaves. At ultraviolet-B dose rates insufficient to cause inhibition of net photosynthesis, changes in the magnitude of fluorescence transients did occur, which suggested direct effects on chloroplast pigments in Pisum and inhibition of photosynthetic electron transport between the photosystems in both species. Leaves of these two species subjected to a much higher dose rate had a significant reduction of net …
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 …
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 …
Allocation Of Reproductive Effort To The Male And Female Strategies In Wind-Pollinated Plants, Cliff A. Lemen
Allocation Of Reproductive Effort To The Male And Female Strategies In Wind-Pollinated Plants, Cliff A. Lemen
School of Natural Resources: Faculty Publications
Amaranthus and several other wind-pollinated species of plants are used to test some of the theoretical models of relative reproductive effort towards the male and female sexes. Consistent with these models, in self-compatible, monoecious Amaranthus, Chenopodium, Digitaria, Setaria, and Lepidium, female effort represented over 90% of the total reproductive effort. Also consistent with predictions, Lolium, a self-incompatible wind-pollinated species, was found to have about equal male and female effort. A method is described here that should prove useful in quantifying male and female effort in both wind and insect-pollinated species of plants.
Intrapopulational Morphological Variation As A Predictor Of Feedlng Behavior In Deermice, Richard A. Smartt, Cliff A. Lemen
Intrapopulational Morphological Variation As A Predictor Of Feedlng Behavior In Deermice, Richard A. Smartt, Cliff A. Lemen
School of Natural Resources: Faculty Publications
Within populations of animals that have determinate growth, all fully grown adults, even of one sex, are not identical. Both genetic and environmental factors are responsible for this variation. In recent years the importance of this variation has received much attention (Mayr 1963; Van Valen 1965; Fretwell 1969; Soule and Stewart 1970; Rothstein 1973). The important question asked has been, What effect does this morphological variation have on niche width and the ecology of a population? Implicit in many of these works is the concept that differences in the morphologies of population members can result in differences in their niches. …
Relationship Between Relative Brain Size And Climbing Ability In Peromyscus, Cliff A. Lemen
Relationship Between Relative Brain Size And Climbing Ability In Peromyscus, Cliff A. Lemen
School of Natural Resources: Faculty Publications
Eisenberg and Wilson (Evolution, 32:740-751, 1978) have documented an interesting relationship between the relative brain size of bats and the complexity of the habitat in which they forage. They found that bats that fly and forage through foliage have larger brains relative to their body size than those that forage in open air. Their explanation was that bats in the complex habitat must process more complex sonic information to navigate through the foliage. In order to do this a larger brain is required.
The Peromyscus of North America may offer a similar paradigm as far as habitat complexity …
Ward V. Coleman, Cert. Granted (Sub Nom. United States V. Ward): A Fifth Amendment Problem In The Enforcement Of The Federal Water Pollution Control Act, Mark Cohen
Marine Affairs Theses and Major Papers
On March 23, 1975 oil leaked out of an oil retention pit at a drilling site owned by L.O. Ward. Ward was an Oklahoma wildcatter and the owner and operator of L.O. Ward Oil and Gas Operations. The spilled oil ran down a gully and into Boggie Creek. Boggie Creek is a tributary of the navigable Arkansas River. The discharge of oil from Ward's property therefore amounted to the discharge of a harmful quantity of oil within the meaning of Section 1321 (b)(3) of the Federal Water Pollution Control Act and also a harmful quantity within the meaning of regulations …
An Avoidance Response Bioassay For Aquatic Pollutants, Jeffrey A. Black, Wesley J. Birge
An Avoidance Response Bioassay For Aquatic Pollutants, Jeffrey A. Black, Wesley J. Birge
KWRRI Research Reports
Avoidance response bioassays were conducted with eight aquatic contaminants, including cadmium, copper, mercury, zinc, chloroform, dioctyl phthalate (DOP), trisodium nitrilotriacetic acid (NTA), and phenol. Tests were performed in a dual-channel fluviarium system, and the toxicant injection procedure used provided good regulation of exposure concentrations. Juvenile stages of largemouth bass (Micropterus salmoides), bluegill sunfish (Lepomis macrochirus), and rainbow trout (Salmo gairdneri), and tadpoles of the American toad (Bufo americanus) proved to be suitable animals for evaluating avoidance or attraction responses. The trout was the most sensitive species tested.
Avoidance was significant in tests …
Macrobenthic Communities Of An Industrialized Seaport Ecosystem: The Southern Branch Of The Elizabeth River, Virginia, Steven D. Hawthorne
Macrobenthic Communities Of An Industrialized Seaport Ecosystem: The Southern Branch Of The Elizabeth River, Virginia, Steven D. Hawthorne
Biological Sciences Theses & Dissertations
Macrobenthic invertebrates of an industrialized seaport ecosystem were studied seasonally from October, 1977 through July, 1978. Five stations were selected along the Southern Branch of the Elizabeth River, Virginia. The stations ranged from an area of heavy industrialization to a non-urbanized environment. At each station, bottom water was measured for salinity, temperature, dissolved oxygen, and pH. Within each sampling area, macrobenthic infauna! invertebrates were collected from in and out of channel sites along with sediment samples for various types of physicochemical analysis.
Community structure was spatially homogeneous at station sites and throughout the stations along the River. Slightly acidic pH …
Isolation And Enumeration Of Enteric Viruses From Primary Wastewater Sludge, Michael Wayne Nath
Isolation And Enumeration Of Enteric Viruses From Primary Wastewater Sludge, Michael Wayne Nath
Biological Sciences Theses & Dissertations
The presence of large numbers of enteric viruses in wastewaters has resulted in concern regarding their significance and consequences for humans. Assessments of relative significance or consequences may most accurately be made following precise measurements of the range of virus types and amounts in wastewaters and sludges and after epidemiological considerations. In this study, results are presented pertaining to enteric virus isolation, concentration, and enumeration from primary wastewater sludges.
As an integral part of a comparison of isolation procedures, several anionic surfactants were examined for extraction of enteric viruses from primary wastewater sludges. Plaquing efficiencies for poliovirus type 2 and …
Mountain Beaver Problems In The Forests Of California, Oregon And Washington, John E. Borrecco, Robert J. Anderson
Mountain Beaver Problems In The Forests Of California, Oregon And Washington, John E. Borrecco, Robert J. Anderson
Vertebrate Pest Conference Proceedings: 9th (1980)
Mountain beavers (Aplodontia rufa) cause considerable damage to forest trees in the Pacific Northwest. Feeding injuries result in mortality, growth losses, deformity of trees, and understocked plantations. Losses are most severe in new plantations with significant damage problems also occurring in sapling stands. Trapping, and placing physical barriers around individual trees, are the most common methods of control. Both methods are costly but effective in reducing damage.
The Situation Of Grain-Eating Birds In Somalia, Richard L. Bruggers
The Situation Of Grain-Eating Birds In Somalia, Richard L. Bruggers
Vertebrate Pest Conference Proceedings: 9th (1980)
Research into the biology and control of pest birds in Somalia has continued intermittently since 1971 under UNDP funding of four projects. Data have been gathered on the identification, distribution, and status of the principal pest species to agriculture. These species include the Red-billed Quelea (Quelea quelea), of which northern and southern races occur, and several other ploceid weavers (Ploceus spp.) which may damage cereal crops. The movements, food habits, and corresponding impact of these species on agriculture in Somalia are discussed in detail. As a result of the information obtained during these years of research, emphasis has recently shifted …
Armadillos: Problems And Control, Patricia A. Chamberlain
Armadillos: Problems And Control, Patricia A. Chamberlain
Vertebrate Pest Conference Proceedings: 9th (1980)
The nine-banded armadillo (Dasypus novemcinctus) has been successful in extending its range throughout the southeastern states. It occupies such a diverse range of habitats that its effects on its surroundings depend largely on where it is located. It offers benefits from its burrowing and eating patterns by creating dens for furbearers and destroying large quantities of injurious insects and their larva. Those same activities in urban and suburban areas are now being recognized as a source of considerable nuisance and moderate damage. Damage is most severe from July through early November. They have been recognized in connection with several diseases …
Proceedings: Ninth Vertebrate Pest Conference
Proceedings: Ninth Vertebrate Pest Conference
Vertebrate Pest Conference Proceedings: 9th (1980)
Proceedings: Ninth Vertebrate Pest Conference
Socioeconomic And Ecological Aspects Of Field Rat Control In Tropical And Subtropical Countries, Hans Kurylas
Socioeconomic And Ecological Aspects Of Field Rat Control In Tropical And Subtropical Countries, Hans Kurylas
Vertebrate Pest Conference Proceedings: 9th (1980)
The vital question, as to the cause of the permanent increase in field rat populations throughout most tropical and subtropical areas, has been the subject of researchers and fieldmen during the past years, in the hope of finding an answer to this problem. Man has made his way through history wherein he was gradually able to renounce nature and establish his own man-made cultural frame. Unlike other mammals, man has no natural instincts to guide him through life. Brain and spirit have to compensate for lack of physical capabilities and instincts. Man was forced to change his natural surroundings in …
Closing Remarks ─ Ninth Vertebrate Pest Conference , Rex E. Marsh
Closing Remarks ─ Ninth Vertebrate Pest Conference , Rex E. Marsh
Vertebrate Pest Conference Proceedings: 9th (1980)
Closing Remarks
Keynote Address ─ New Concepts In Wildlife Management, Lester Mccann
Keynote Address ─ New Concepts In Wildlife Management, Lester Mccann
Vertebrate Pest Conference Proceedings: 9th (1980)
New Concepts in Wildlife Management
Taste-Aversion Learning And Its Implications For Rodent Control, Robert J. Robbins
Taste-Aversion Learning And Its Implications For Rodent Control, Robert J. Robbins
Vertebrate Pest Conference Proceedings: 9th (1980)
Although bait shyness has long been recognized as a problem to be overcome in the control of vertebrate pests, it has recently been suggested that the phenomenon might be turned to an advantage and used as an alternative, non-lethal form of control. Unfortunately, this technique has not proven to be as useful as hoped, as the work which has been done on coyotes is inconclusive at best and some recent work on rodents has cast serious doubts upon the method's potential. However, an extensive literature dealing with the formation of poison-based food aversions now exists, and insights gained from these …
The Habits And Influence On The Environment Of The Old World Porcupine Hystrix Cristata L. In The Northernmost Part Of Its Range, L. Santini
Vertebrate Pest Conference Proceedings: 9th (1980)
The Crested porcupine (Hystrix cristata L.) has been shown to have considerably increased in numbers, and to have occupied new territories in Tuscany, which is the northernmost part of its range. New data on its ecology and biology, and the negative effects of an excessive density of these rodents on the rural and natural environment are reported. Since this species is protected by law in Italy, because of its high value from the faunistic point of view, some possible techniques, to be improved upon, for the capture and redistribution of live specimens are discussed.
Development Of A Simple Two-Ingredient Pyrotechnic Fumigant, Peter J. Savarie, James R. Tigner, Donald J. Elias, David J. Hayes
Development Of A Simple Two-Ingredient Pyrotechnic Fumigant, Peter J. Savarie, James R. Tigner, Donald J. Elias, David J. Hayes
Vertebrate Pest Conference Proceedings: 9th (1980)
In laboratory tests with adult coyotes (Canis latrans) a pyrotechnic fumigant containing two active ingredients, sodium nitrate and charcoal, was found to be just as effective as the U.S. Fish and Wildlife Service Gas Cartridge that contains six active and two inactive ingredients. The two-ingredient cartridge produces high concentrations of carbon monoxide. Field tests with cartridges containing 240 g of 65% sodium nitrate and 35% charcoal produced a 96% mortality rate in coyote pups. A cartridge containing 65 g of 65% sodium nitrate and 35% charcoal was effective in both laboratory and field tests on wild Norway rats (Rattus norvegicus). …
Studies Of The Toxicity Of Vacor (Rh-787) On The Reproductive Biology Of Rattus Rattus Rufescens, Y. Saxena, P.P. Sharma, M. Zutshi
Studies Of The Toxicity Of Vacor (Rh-787) On The Reproductive Biology Of Rattus Rattus Rufescens, Y. Saxena, P.P. Sharma, M. Zutshi
Vertebrate Pest Conference Proceedings: 9th (1980)
Investigations on damage, losses and diseases attributed to rodents in India are well documented by Barnett and Prakash (1975), Fitzwater and Prakash (1973). The toxicity of rodenticides on the rodents have been studied by several investigators such as Cowan (1978), Marsh and Howard (1975, 1977). Some rodenticides are less potent and induce overall deleterious effects on biological systems but not on mortality. Therefore, studies on the effects of these agents on the reproductive biology would be of significance as reported by D'souza and Batra (1975). Srivastava et al. (1979) investigated the bait shyness as shown by rodents in case of …