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Articles 5491 - 5520 of 7341

Full-Text Articles in Physical Sciences and Mathematics

Management Implications Derived From Bird Damage Assessments In North Dakota Sunflower, Joseph L. Guarino, John L. Cummings Sep 1985

Management Implications Derived From Bird Damage Assessments In North Dakota Sunflower, Joseph L. Guarino, John L. Cummings

Wildlife Damage Management Conference

The most recent estimate of blackbird damage to ripening sunflower (Helianthus annuus) in North Dakota in 1980 exceeded $6 million. Although less than 5% of the sunflower fields in the state received greater than 10% damage in each of four past survey years, as much as 50% of the total state-wide damage occurred in these fields. This loss can be combated with cost-effective control. Successful control requires timely action when blackbirds are in large concentrations. Frightening blackbirds from fields early in the damage season disperses damage and this can result in compensatory growth by sunflower, whereby yields at …


Preparation And Analysis Of Alternative 4-Ap Baits For Blackbirds, J. E. Davis, D. J. Cunningham, J. L. Cummings Sep 1985

Preparation And Analysis Of Alternative 4-Ap Baits For Blackbirds, J. E. Davis, D. J. Cunningham, J. L. Cummings

Wildlife Damage Management Conference

Red-winged blackbird (Agelaius phoeniceus) acceptance of corn as a bait for use in ripening sunflower has been questioned. This study demonstrated that sunflower meats, sunflower achenes, and pearled barley all have potential as alternative bait carriers for 4-AP. Each can be treated with 4-AP so that individual bait particles carry dosages equivalent to those of cracked corn in the registered product, Avitrol FC Corn Chops 99S. Treated baits produced a distress response in redwings in times ranging from 21.7 min (sunflower meats) to 64.5 min (sunflower achenes). The time to distress elicited by sunflower meats coated with 4-AP …


The Effects Of Canada Goose Grazing On Winter Wheat: An Experimental Approach, Hubert A. Allen Jr., David Sammons, Russell Brinsfield, Roland Limpert Sep 1985

The Effects Of Canada Goose Grazing On Winter Wheat: An Experimental Approach, Hubert A. Allen Jr., David Sammons, Russell Brinsfield, Roland Limpert

Wildlife Damage Management Conference

The effects of grazing winter wheat (Triticum aestivum) by Canada geese (Branta canadensis) was assessed in 3 fields during 2 years of experimentation at the Wye Research and Education Center, Queenstown, Maryland. Randomly placed wire enclosures prevented goose grazing on 11.1 m sq. control plots. Grazed plots were marked in each field soon after the geese migrated in March. Grazed plots had consistently lower yields than ungrazed plots with mean differences ranging from 0-13%. The differences were related to the intensity of grazing. Other parameters, including mean weight per seed, mean number of seeds per spike, …


Removal Of Nesting Starlings With Drc-1339, Douglas I. Hall Sep 1985

Removal Of Nesting Starlings With Drc-1339, Douglas I. Hall

Wildlife Damage Management Conference

DRC-1339-treated crickets (Gryllus sp.) were utilized in an attempt to remove starlings (Sturnus vulgaris) nesting and rearing young in the aircraft hangars at the Little Rock Air Center, Little Rock, Pulaski County, Arkansas. Bait ratio of 1 treated to 5 untreated crickets was used. They were placed under airport night lights where foraging birds naturally gathered to feed on insects attracted to these lights. Adult starlings consumed the crickets as well as fed them to their young. Lethal control was achieved on both age classes of bird. Field test results show promise for the development of …


Apparent Efficacy Of Bird Aircraft Strike Hazard Programs At Four Naval Air Stations, Thomas C. Walker, C. Willard Bennett Sep 1985

Apparent Efficacy Of Bird Aircraft Strike Hazard Programs At Four Naval Air Stations, Thomas C. Walker, C. Willard Bennett

Wildlife Damage Management Conference

The Department of the Navy implemented its present mandatory bird-aircraft strike reporting system in 1981. Reported bird-aircraft strikes have increased each year presumably due to increased awareness and compliance with regulations. Four Naval air stations implementing bird-aircraft strike hazard reduction programs in 1984 reported 57-78% fewer strikes in 1984 than in 1983.


Birds In Hangars- A Messy Problem, Albert E. Bivings Iv Sep 1985

Birds In Hangars- A Messy Problem, Albert E. Bivings Iv

Wildlife Damage Management Conference

Pest birds in hangars and similar man-made structures pose specific health hazards as well as nuisance and corrosion problems. While lethal control or a scaring program may be the best technique for some locations, neither address the long-term problem of the basic attractiveness of these structures to birds. The best long-term solution usually is to exclude the birds with permanently installed plastic or nylon netting. Several methods to accomplish this are discussed.


Air Force Problems With Birds In Hangars, Timothy J. Will Sep 1985

Air Force Problems With Birds In Hangars, Timothy J. Will

Wildlife Damage Management Conference

The Air Force's Bird - Aircraft Strike Hazard (BASH) Team has been dealing with bird hazards to aircraft for over ten years, primarily through awareness programs, direct assistance to military bases, and through R&D aimed at world-wide BASH reduction. As with any problem where a biological system (in this case, birds) is involved, diversification is important in developing solutions. The BASH Team has recommended a variety of methods for working with hazards from birds. One area of particular concern is the nuisance of pest birds in hangars. These structures are extremely alluring to birds, which seek the roof-supporting I-beams and …


The Role Of State And Wildlife Agencies In Wildlife Damage Control, Charles D. Kelley Sep 1985

The Role Of State And Wildlife Agencies In Wildlife Damage Control, Charles D. Kelley

Wildlife Damage Management Conference

The Alabama Game and Fish Division is responsible for the stewardship of the wildlife and fisheries resources in the state. Within this context and the cooperative efforts with other agencies that have dealings with animal damage, the Division develops, permits, approves and administers control of both game and nongame (except migratory) species of wildlife.

Animal control complaints fall into two major areas - crop damage and nuisance animals. Nuisance animals, with some exceptions, are bats, armadillos, alligators, woodpeckers, snakes, birds that roost or nest in rookeries. Squirrels, bears, rabbits are the cause of both nuisance and crop damage complaints. Deer, …


The Role Of The Indiana Division Of Fish And Wildlife In Wildlife Damage Control, Glenn Lange Sep 1985

The Role Of The Indiana Division Of Fish And Wildlife In Wildlife Damage Control, Glenn Lange

Wildlife Damage Management Conference

As defined by state statue, the Division of Fish and Wildlife is responsible for the protection, reproduction, care, management, survival, and regulation of all wildlife populations. By law, the Division must take a leading role in solving wildlife damage problems when they occur.


Wildlife Damage Control And The Wildlife Society, Thomas M. Franklin Sep 1985

Wildlife Damage Control And The Wildlife Society, Thomas M. Franklin

Wildlife Damage Management Conference

Wildlife damage control is recognized by The Wildlife Society as an essential and responsible segment of the wildlife profession. At least since 1959, Society committees have addressed elements of wildlife damage control (although wildlife damage control was not always the specific term used).

The Wildlife Society Council first approved an "Animal Damage Control" position statement in 1968. In March 1985, Council updated and renamed it "Wildlife Damage Control" to emphasize our positive approach to this important segment of wildlife management. The official position statement was published in The Wildlifer (May-June 1985) and is reprinted below.


Usda Forest Service Role In Wildlife Damage Control, Hugh C. Black Sep 1985

Usda Forest Service Role In Wildlife Damage Control, Hugh C. Black

Wildlife Damage Management Conference

Wildlife damage control is an important objective of resource management on the 191 million acres of National Forest System (NFS) lands administered by the USDA Forest Service. Policy on wildlife damage control is based on the USDA Policy on Fish and Wildlife (Secretary's Memorandum 9500-3, July 1983). The objective of wildlife damage control is to reduce damage and loss by wildlife on all NFS lands to levels consistent with management objectives. Control measures are only undertaken when and where necessary to realize wildlife management objectives and to prevent serious damage to public or private property and natural resources. Because of …


Role Of The U.S. Environmental Protection Agency In Wildlife Damage Control, William W. Jacobs Sep 1985

Role Of The U.S. Environmental Protection Agency In Wildlife Damage Control, William W. Jacobs

Wildlife Damage Management Conference

The U.S. Environmental Protection Agency is the Federal agency in charge of pesticide registration. Therefore, EPA has ultimate regulatory authority over the pesticide compounds used for wildlife damage control.


Role And Responsibilities Of Agencies For Wildlife Damage Control, Hal S. Atkinson Jr. Sep 1985

Role And Responsibilities Of Agencies For Wildlife Damage Control, Hal S. Atkinson Jr.

Wildlife Damage Management Conference

The wildlife resources of the State belong to the people of the state as a whole. The Wildlife Resources Commission is charged with the stewardship of these resources and is empowered by general statute to promulgate those regulations deemed necessary to accomplish this charge.


Role And Responsibilities Of Agencies For Wildlife Damage Control - An Overview, James E. Miller Sep 1985

Role And Responsibilities Of Agencies For Wildlife Damage Control - An Overview, James E. Miller

Wildlife Damage Management Conference

"A well balanced wildlife management program includes research, the acquisition of land, the development of habitat, the careful regulation of hunting or harvest, the protection of certain species, the enforcement of laws -- and -- the control of animal depredations. Though necessary, this is among the least popular and most controversial of the wildlife management functions. It is, nevertheless, one of the activities which a responsible agency must undertake." This statement is a direct quote from the International Association of Fish and Wildlife Agencies' (IAFWA) Position Paper on Animal Damage Control (1981).


Future Of Wildlife Damage Control And The Cooperative Extension Service, Peter T. Bromley Sep 1985

Future Of Wildlife Damage Control And The Cooperative Extension Service, Peter T. Bromley

Wildlife Damage Management Conference

The driving forces which determine the role of the Cooperative Extension Service in wildlife damage control are (1) the demand for information by the public, (2) the degree of support for programs at the national level, and (3) the level of professionalism exhibited by Cooperative Extension Agents and subject matter Specialists. Analysis of several trends suggests that the Cooperative Extension Service role in Wildlife Damage Control will increase in coming years. The movement of urban people into rural settings will create greater demands for wildlife damage control information. Likewise, the expansion of wildlife population into urban and suburban environments due …


What You Wanted To Know About All You Ever Heard Concerning Snake Repellents, Gary J. San Julian, David K. Woodward Sep 1985

What You Wanted To Know About All You Ever Heard Concerning Snake Repellents, Gary J. San Julian, David K. Woodward

Wildlife Damage Management Conference

Have you ever heard about a way to keep snakes away from your house? Many people in North Carolina have been told by their elders of various ways to repel snakes. When we first started working on this problem in North Carolina, we were amazed at the number of "home remedies" that people believed would protect their property from snakes; and we began to keep a record of these remedies. In 1981, a grant from the Pesticide Impact Assessment Program allowed us to begin to test some of these remedies to determine their value.


Deer Damage And Damage Control In Ohio's Nurseries, Orchards, And Christmas Tree Plantings: The Grower's View, Joel D. Scott, Thomas W. Townsend Sep 1985

Deer Damage And Damage Control In Ohio's Nurseries, Orchards, And Christmas Tree Plantings: The Grower's View, Joel D. Scott, Thomas W. Townsend

Wildlife Damage Management Conference

A survey of white-tailed deer (Odocoileus virginianus) damage was conducted among growers (N = 2,236) of fruit, Christmas tree and nursery crops in Ohio; over 81% responded. Damage was reported by 43.1% of Christmas tree growers, 41.3% of orchardists and 32.5% of nurserymen. Most commonly reported by orchardists as damaged were apples (Malus spp.), by Christmas tree growers were white pines (Pinus strobus), and by nurserymen were maples (Acer spp.). Young plants (x̄ = 7.5 years) were more commonly damaged than older plants of all species. Seasonal damage was most common in …


Public Tolerance Of A Suburban Deer Herd: Implications For Control, Daniel J. Decker, Thomas A. Gavin Sep 1985

Public Tolerance Of A Suburban Deer Herd: Implications For Control, Daniel J. Decker, Thomas A. Gavin

Wildlife Damage Management Conference

Suburban deer populations have been increasing in the eastern U.S., resulting in deer-human conflicts that can not always be resolved by a traditional management approach. Professionals responsible for management of deer damage (herd control and extension education) need information on the extent and nature of deer damage in suburban situations. Attitudes of suburban residential property owners about wildlife in general and deer in particular must be identified so that control measures that are socially acceptable as well as biologically feasible can be formulated. People's tolerance of deer damage and their propensity for undertaking on-site preventive measures need to be analyzed. …


Double-Crested Cormorant Damage To A Commercial Fishery In The Apostle Islands, Wisconsin, Scott R. Craven, Esther Lev Sep 1985

Double-Crested Cormorant Damage To A Commercial Fishery In The Apostle Islands, Wisconsin, Scott R. Craven, Esther Lev

Wildlife Damage Management Conference

The endangered classification of the double-crested cormorant (DCC) in Wisconsin resulted in complete protection and significant management efforts in the 1970's. These efforts, probably coupled with reduced pesticide loads, resulted in a resurgence of Wisconsin cormorant populations from a low of 66 pairs in 1972 to 1028 pairs in 1982. The DCC was reclassified as a threatened species in 1982. This apparent success story did not take into consideration the potential negative impact of an abundant piscivorous bird. In 1978 a colony of DCC's became established on a remote rocky island in the Apostle Islands National, Lakeshore, in Lake Superior. …


Minimum Effective Level Of Methiocarb For Protecting Sprouting Rice In Louisiana From Blackbird Damage, N. R. Holler, P. W. Lefebvre, A. Wilson, R. E. Matteson, G. R. Gutknecht Sep 1985

Minimum Effective Level Of Methiocarb For Protecting Sprouting Rice In Louisiana From Blackbird Damage, N. R. Holler, P. W. Lefebvre, A. Wilson, R. E. Matteson, G. R. Gutknecht

Wildlife Damage Management Conference

Blackbirds cause locally serious losses to rice. The Denver Wildlife Research Center, U. S. Fish and Wildlife Service, and the Rice Research Station, Louisiana State University Agricultural Center have been cooperating in tests to determine the efficacy of methiocarb seed treatments for protecting sprouting rice in Louisiana from blackbird damage. Results from four field tests (1980, 1982, 1983, and 1984) have shown that methiocarb provides good protection when applied to rice seed at the rate of 2.4 g and 1.25 g active ingredient (a.i.)/kg of rice seed (0.25 and 0.125%). Seed treated at 0.6 g a.i ./kg appeared to be …


Commercial Wildlife Pest Control Permits An Alternative Approach, Gerard W. Wendt Sep 1985

Commercial Wildlife Pest Control Permits An Alternative Approach, Gerard W. Wendt

Wildlife Damage Management Conference

No abstract provided.


Role And Responsibilities Of State Cooperative Extension Services For Wildlife Damage Control, James L. Byford Sep 1985

Role And Responsibilities Of State Cooperative Extension Services For Wildlife Damage Control, James L. Byford

Wildlife Damage Management Conference

The Cooperative Extension Service was established by the Smith-Lever Act in 1914. It was designed to improve the lives of people, through education in: agriculture, natural resources, home economics and community development. Its audiences include both adult and youth. 4-H is the primary youth audience. The Cooperative Extension Service is an "extension" of the Land employees include university faculty (specialists) and professional agents in every county, in every state in the country. Extension's primary mission is to conduct an educational program, using research-based information. Research results are condensed into a form that the average person can understand. The role of …


Wildlife Damage Control - The Role And Responsibilities Of The U.S. Fish And Wildlife Service, Leroy W. Sowl Sep 1985

Wildlife Damage Control - The Role And Responsibilities Of The U.S. Fish And Wildlife Service, Leroy W. Sowl

Wildlife Damage Management Conference

No abstract provided.


Interaction Of The Zonalwinds With The Equatorial Midnight Pressure Bulge In The Earth's Thermosphere: Empiricalevidence Of Momentum Balance, F. A. Herrero, H. G. Mayr, N. W. Spencer, A. E. Hedin, Bela G. Fejer Aug 1985

Interaction Of The Zonalwinds With The Equatorial Midnight Pressure Bulge In The Earth's Thermosphere: Empiricalevidence Of Momentum Balance, F. A. Herrero, H. G. Mayr, N. W. Spencer, A. E. Hedin, Bela G. Fejer

Bela G. Fejer

A minimum is observed at midnight in the time variation of averaged zonal winds measured in-situ near the equator at an average altitude of about 350 km, and we inquire whether observations of the equatorial midnight pressure bulge are consistent with this feature. The observed zonal wind maintains an eastward direction all night. It increases steadily in the early evening reaching a maximum of about 160 m/s at 2100 hrs local time (LT), dropping to a minimum of about 70 m/s around 2400 LT, then up to about 120 m/s around 0300 LT, decreasing thereafter and turning westward in the …


The Mechanics Of Low Orbiting Satellites Implications In Communication, Lane Brostrom May 1985

The Mechanics Of Low Orbiting Satellites Implications In Communication, Lane Brostrom

Undergraduate Honors Capstone Projects

Low orbiting satellite communication networks will be competing with geosynchronous satellites for a share of the communications market. In world-wide communications that do not require immediate real time transmissions, low orbiting satellites are competitive with geosynchronous satellites because the system is reliable and low in cost.

Since satellites are a clear example of Newtonian laws, the distinct patterns they make in their orbiting process are predictable. Newton's law states that an object will remain in uniform motion unless acted upon by a force: a satellite remains in motion around the earth because there is no atmosphere to slow it down. …


The Petrology Of The Early Middle Cambrian Giles Creek And Upper Chandler Formations, Northeastern Amadeus Basin, Central Australia, James A. Deckelman May 1985

The Petrology Of The Early Middle Cambrian Giles Creek And Upper Chandler Formations, Northeastern Amadeus Basin, Central Australia, James A. Deckelman

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The Giles Creek and upper Chandler formations crop out in the northeastern Amadeus Basin from the north flank of Ross River syncline south to the Pillar Range, and from the nose of Ooraminna anticline east to the Simpson Desert. Twenty-four sections of the Giles Creek and nineteen sections of the upper Chandler were measured by the author in this area. The Giles Creek lies disconformably above the upper Chandler Formation and conformably below the Shannon Formation. The upper Chandler is conformably underlain by the lower Chandler throughout the area except at Ross River Gorge and Wallaby No. 1 well. There …


Petrology And Mineralogy Of Tertiary(?) Volcanic Rocks West And Southwest Of Kelton (Box Elder Co.), Utah, R. L. Voit May 1985

Petrology And Mineralogy Of Tertiary(?) Volcanic Rocks West And Southwest Of Kelton (Box Elder Co.), Utah, R. L. Voit

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The Kelton, Utah, area has numerous, isolated basaltic outcrops of probable Tertiary age mostly in the form of cuestas with steep faces displaying columnar joints. One ash-flow tuff is located in the southeastern part of the study area. Basaltic fragments in the tuff indicate that pyroclastic activity was preceded by extrusion of basalt.

Effects of Lake Bonneville on the basaltic outcrops include wave­cut terraces, scarps, and other wave-built forms in low lying areas. Massive carbonate deposits formed at levels of former shorelines of Lake Bonneville. Tertiary and Quaternary deposits cover the low- lying areas between basaltic flows, and consist of …


Petrology Of The Late Proterozoic(?)-Early Cambrian Arumbera Sandstone, Western Macdonnell Ranges, North-Central Amadeus Basin, Central Australia, Lonn P. Hamp May 1985

Petrology Of The Late Proterozoic(?)-Early Cambrian Arumbera Sandstone, Western Macdonnell Ranges, North-Central Amadeus Basin, Central Australia, Lonn P. Hamp

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The Arumbera Sandstone consists of mappable informal units which are repeated in a vertical, cyclic succession. Sandstones of fluvial origin form resistant strike ridges separated by strike valleys, which consist of recessive sandstones and mudrocks of marine origin.

Lithofacies 1a, 2b, and 3a are probably of marine origin in intertidal environments. Trace fossil assemblages in lithofacies 3a suggest Skolithos and Cruziana inchnofacies were present. Lithofacies 1e, 2a, 2c, 3b, and 4a are probably of fluvial origin, as the result of coalescing braided stream deposits. The Arumbera Sandstone probably was deposited in a deltaic environment characterized by low wave energy, a …


Brownian Motion Applied To Partial Differential Equations, Steven M. Mckay May 1985

Brownian Motion Applied To Partial Differential Equations, Steven M. Mckay

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This work is a study of the relationship between Brownian motion and elementary, linear partial differential equations. In the text, I have shown that Brownian motion is a Markov process, and that Brownian motion itself, and certain Stochastic processes involving Brownian motion are also martingales. In particular, Dynkin's formula for Brownian motion was shown. Using Dynkin's formula and Brownian motion, I then constructed solutions for the classical Dirichlet problem and the heat equation, given by Δu=0 and ut= 1/2Δu+g, respectively. I have shown that the bounded solution is unique if Brownian motion will always exit the domain of …


The Reconstruction Conjecture In Graph Theory, Susan M. Loveland May 1985

The Reconstruction Conjecture In Graph Theory, Susan M. Loveland

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In this paper we show that specific classes of graphs are reconstructible; we explore the relationship between the reconstruction and edge-reconstruction conjectures; we prove that several classes of graphs are actually Harary to the reconstructible; and we give counterexamples reconstruction and edge-reconstruction conjectures for infinite graphs.