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Articles 5671 - 5700 of 7823
Full-Text Articles in Environmental Health and Protection
Closing Remarks - Sixteenth Vertebrate Pest Conference, Robert M. Timm
Closing Remarks - Sixteenth Vertebrate Pest Conference, Robert M. Timm
Vertebrate Pest Conference Proceedings: 16th (1994)
As Chairperson-elect of the Council, I wish to express my appreciation to all who participated in this 16th Conference. I trust you have enjoyed this conference, as I have, as well as your visit to the Santa Clara Valley. Much information has been presented here, not only in the more than 70 formal presentations, but also in evening sessions, meetings, and informal sharing and interaction. We hope we have provided adequate opportunities for informal networking, as this can be equally valuable as the scheduled papers and presentations.
Rodent Pests In Colombian Agriculture, Danblo Valencia, Donald J. Elias, Jorge A. Ospina
Rodent Pests In Colombian Agriculture, Danblo Valencia, Donald J. Elias, Jorge A. Ospina
Vertebrate Pest Conference Proceedings: 16th (1994)
The tropical zones of Latin America are sources of a great faunal richness. A significant number of mammals are associated with damage to the agricultural and livestock industries of Colombia. Some studies have indicated that rodents cause serious economic and social damage in the agricultural, livestock, and stored product sectors of the Colombian economy. Evaluations of this damage have been based on three criteria: 1) the characteristics of the damage; 2) the species of rodent involved; and 3) the loss of production at harvest. Cereals and oil-producing crops are most affected as standing crops; in the livestock area, poultry and …
Using Geographic Information Systems For Tracking An Urban Rodent Control Program, Matt Von Wahlde, Bruce A. Colvin
Using Geographic Information Systems For Tracking An Urban Rodent Control Program, Matt Von Wahlde, Bruce A. Colvin
Vertebrate Pest Conference Proceedings: 16th (1994)
Geographic information system technology is being used to help coordinate an urban rodent control program initiated as part of the Central Artery/Tunnel Project in Boston. Databases with neighborhood survey data, surface and subsurface baiting data, sanitation code violations, and public complaints are linked to base mapping, land parcel, and utility graphics. This integrated approach helps Project biologists plan control strategies and evaluate the relatedness of rodent activity to environmental conditions. Spatial querying techniques and the ability to graphically display and map variables, such as bait stations and sanitation deficiencies, help ensure that control resources are effectively targeted and tracked. This …
Zinc Phosphide: Implications Of Optimal Foraging Theory And Particle-Dose Analyses To Efficacy, Acceptance, Bait Shyness, And Non-Target Hazards, Ray T. Sterner
Zinc Phosphide: Implications Of Optimal Foraging Theory And Particle-Dose Analyses To Efficacy, Acceptance, Bait Shyness, And Non-Target Hazards, Ray T. Sterner
Vertebrate Pest Conference Proceedings: 16th (1994)
The U.S. Department of Agriculture (USDA), Animal Plant and Health Inspection Service (APHIS) maintains six federal registrations for zinc phosphide (Zn3P2); three of these address the control of eight rodent species using steam-rolled oats (SRO) or wheat grains in diverse applications. Optimal foraging theory (OFT) and "particle-dose analysis" (PDA) afford predictions relevant to the efficacy, acceptance, bait shyness, and non-target hazards of these Zn3P2 baits. For PDA, numbers of SRO groats or whole wheat grains associated with acute oral median lethal (LD^) or approximate lethal (ALD) doses of Zn3P2 were compared among nine target rodent and eleven …
Registration Requirements For Non-Toxic Natural Products As Animal Damage Control Agents, Stephen A. Schumake
Registration Requirements For Non-Toxic Natural Products As Animal Damage Control Agents, Stephen A. Schumake
Vertebrate Pest Conference Proceedings: 16th (1994)
Plant extracts, animal glandular secretions and excretions, and natural food flavoring agents are common sources of natural products that can be used in animal damage control applications. Such products can be used either by themselves (e.g., coyote urine as a rodent repellent), or in combination with other control agents (e.g., food odor or flavor enhancer at baiting sites). The Environmental Protection Agency registration requirements are described for a variety of potential applications of natural products including bird and rodent repellents. In some applications, the product chemistry or other data requirements could make the registration process prohibitive due to the cost …
Sources Of Information On Wildlife Damage Control, Robert M. Timm
Sources Of Information On Wildlife Damage Control, Robert M. Timm
Vertebrate Pest Conference Proceedings: 16th (1994)
In the area of wildlife damage control, people encounter a great diversity of problems for which they need effective, timely solutions. Published materials or sources of help are often scattered, difficult to locate, or even unknown to many who work in this discipline. Let me begin with three stories. They are fictional, but they are created from the variety of wildlife-human conflicts that occur in California. Thus, they represent the reality of human attempts to deal with wildlife damage.
Rejex-ItTm Ag-36 As Bird Aversion Agent For Turf And Agriculture, Peter F. Vogt
Rejex-ItTm Ag-36 As Bird Aversion Agent For Turf And Agriculture, Peter F. Vogt
Vertebrate Pest Conference Proceedings: 16th (1994)
In limited field studies on turf, winter rye, cherries and blueberries, where the presence of sufficient concentrations of ReJeX-iTTM AG-36 were known to exist, excellent bird repellency was achieved. Variations in the results are attributed to low concentrations of the initial application, rapid biodegradation due to environmental conditions, or limited application (covering less than 100% of the test plot).
An Approach To Controlling Golden Eagle Predation On Lambs In South Dakota, Blair C. Watte, Robert L. Phillips
An Approach To Controlling Golden Eagle Predation On Lambs In South Dakota, Blair C. Watte, Robert L. Phillips
Vertebrate Pest Conference Proceedings: 16th (1994)
A case of severe golden eagle (Aquila chrysaetos) predation on domestic sheep was documented on seven South Dakota ranches during the spring of 1993. One hundred forty-two lambs and one ewe were verified as being killed by eagles during a six-week period. In an effort to resolve the depredation problem, padded leghold traps were used to capture 21 golden eagles in or near the lambing pastures. The captured eagles were translocated and released approximately 322 km northeast of the capture area. Predation on lambs ceased following the relocation effort.
Alpha-Chloralose: Current Status, Restrictions And Future Uses For Capturing Birds, Paul P. Woronecki, Richard A. Dolbeer
Alpha-Chloralose: Current Status, Restrictions And Future Uses For Capturing Birds, Paul P. Woronecki, Richard A. Dolbeer
Vertebrate Pest Conference Proceedings: 16th (1994)
In 1992, the Animal Damage Control (ADC) program received approval from the Food and Drug Administration (FDA) to use Alpha-Chloralose (A-C) nationwide for capturing waterfowl (Anatidae), coots (Fulica americana), and pigeons (Columba livia). To review the first year (1993) of operational use of A-C, we surveyed in January 1994 all ADC State Directors on the status of A-C use within their states. In 1993, 59 ADC personnel were trained and certified in the approved uses of A-C and 696 nuisance waterfowl were captured with A-C in 10 states. Restrictions imposed by U.S. Fish and Wildlife Service …
Acrolein As A Ground Squirrel Burrow Fumigant, Jerry P. Clark
Acrolein As A Ground Squirrel Burrow Fumigant, Jerry P. Clark
Vertebrate Pest Conference Proceedings: 16th (1994)
Acrolein (Magnicide ®H) is registered in California as an aquatic herbicide. Studies in Alameda and Modoc Counties were conducted to evaluate the field efficacy of acrolein as a ground squirrel burrow fumigant. Applications of acrolein (92%) at 20 ml and 40 ml per burrow were made from a custom built jet gun connected to a hose which ran to a cylinder mounted on a pickup truck. The burrow openings were covered with soil after application. The application rate of 20 ml of acrolein per burrow provided approximately 90% control of ground squirrels. Acrolein applied at 40 ml did not significantly …
Evaluation Of Field Sampling Techniques For Estimation Of Bird Damage In Pistachio Orchards, A. Charles Crabb, James J. Marois, Terrell P. Salmon
Evaluation Of Field Sampling Techniques For Estimation Of Bird Damage In Pistachio Orchards, A. Charles Crabb, James J. Marois, Terrell P. Salmon
Vertebrate Pest Conference Proceedings: 16th (1994)
Pistachio orchards were selected and evaluated for damage caused by either scrub jays (Aphelocoma coerulescens) or American crows (Corvus brachyrhynchos). The distribution of damage caused by each species was evaluated and quantified. The percentage of trees damaged by scrub jays ranged from 58% to 99% and tended to be distributed randomly throughout the. orchard. In orchards with crow damage, the percentage of trees damaged ranged from 18% to 46% and damage tended to be aggregated. Data from orchards were used to evaluate the relative accuracy and precision of various sampling strategies. Randomly distributed bird damage could be sampled with relatively …
Managing Raccoons, Skunks, And Opossums In Urban Settings, Kevin D. Clark
Managing Raccoons, Skunks, And Opossums In Urban Settings, Kevin D. Clark
Vertebrate Pest Conference Proceedings: 16th (1994)
Increased urbanization and decreased government funding, plus increased numbers of certain wildlife species, have combined to provide a greater need for wildlife management of nuisance animals in the urban environment.
Laboratory Studies With Compound Drc-1339 On Feral Pigeons, John L. Cummings, Patricia A. Pochop, Melvyn V. Garrison, Carol A. Furcolow, James E. Davis Jr.
Laboratory Studies With Compound Drc-1339 On Feral Pigeons, John L. Cummings, Patricia A. Pochop, Melvyn V. Garrison, Carol A. Furcolow, James E. Davis Jr.
Vertebrate Pest Conference Proceedings: 16th (1994)
Laboratory studies were conducted to determine an effective DRC-1339 concentration and bait dilution ratio to control pigeons. Treated whole corn baits formulated with Alcolec-s®, corn starch, or corn oil as adhesive agents and 0.25% or 0.37% DRC-1339 diluted 1:5 with untreated corn produced < 10% mortality. DRC-1339 treated whole corn baits (0.25% and 0.37%) diluted 1:0 and formulated with Alcolec-s® produced 20% and 5% mortality, respectively. Whole corn treated with 0.37% DRC-1339, diluted 1:0, and formulated with corn starch produced 68% mortality in laboratory-held pigeons and was selected for further evaluations in field studies to provide efficacy data to the EPA. DRC-1339 residue levels observed in pigeons free-feeding on 0.37% undiluted DRC-1339 treated corn was not detected in breast tissue and only occurred in the gastrointestinal tract of two of five pigeons at 0.06 and 0.19 ppm. DRC-1339 residues observed in pigeons force-fed 21 whole corn kernels treated with 0.37% DRC-1339 (approximately 5 times the LDso dose) were not detectable after 3 h in breast tissue and 24 h in the gastrointestinal tract. DRC-1339 residues in pigeons gavaged with 58 mg DRC-1339 (over 10 times the LDM dose) were detectable in the breast muscle of four of nine pigeons at 0.061 to 0.10 ppm. DRC-1339 residues in the gastrointestinal tract ranged from 0.13 to >17 ppm in eight of nine treated pigeons and was not detectable in the remaining pigeon.
Preventing Deer Damage With Barrier, Electrical, And Behavioral Fencing Systems, Paul D. Curtis, Michael J. Fargione, Milo E. Richmond
Preventing Deer Damage With Barrier, Electrical, And Behavioral Fencing Systems, Paul D. Curtis, Michael J. Fargione, Milo E. Richmond
Vertebrate Pest Conference Proceedings: 16th (1994)
White-tailed deer (Odocoileus virginianus) are responsible for damage to a variety of horticultural crops. Economic losses often require growers to implement one or more damage management methods including repellents, scare devices, hunting to control deer numbers, and fencing. A relatively small proportion of producers currently use fencing as their primary deer damage management technique due to high initial costs and other perceived shortcomings. Several fencing systems, including baited single wires, three-dimensional outriggers, and slanted and vertical fences up to 3.3 m (11 feet) in height have successfully excluded deer under some conditions, but simple designs are effective only under light …
Food Habits And Management Of Introduced Red Fox In Southern California, Richard T. Golightly Jr., Michelle R. Faulhaber, Kevin L. Sallee, Jeffrey C. Lewis
Food Habits And Management Of Introduced Red Fox In Southern California, Richard T. Golightly Jr., Michelle R. Faulhaber, Kevin L. Sallee, Jeffrey C. Lewis
Vertebrate Pest Conference Proceedings: 16th (1994)
Introduced red fox in urban Orange County, California ate a wide variety of foods. Mammals and birds were consumed at all times of the year and both taxa appeared in approximately half or more of the fecal samples at all times of the year. Human supplied food remains were also common and supplemental feeding occurred at all study sites. Supplemental feeding has the potential to exacerbate problems for management of introduced red fox and several endangered species.
Opening Remarks - Sixteenth Vertebrate Pest Conference, Wendy S. Halverson
Opening Remarks - Sixteenth Vertebrate Pest Conference, Wendy S. Halverson
Vertebrate Pest Conference Proceedings: 16th (1994)
Opening remarks
The European Ferret, Mustela Putorius, (Family Mustelidae) Its Public Health, Wildlife And Agricultural Significance, Jim C. Hitchcock
The European Ferret, Mustela Putorius, (Family Mustelidae) Its Public Health, Wildlife And Agricultural Significance, Jim C. Hitchcock
Vertebrate Pest Conference Proceedings: 16th (1994)
The European ferret, Mustela putorius, a species prohibited in California, has become increasingly popular as a household "pet." As a result, its threat to public health, wildlife and agriculture has markedly increased. There has also been a consequent increase in reported attacks on humans, especially infants, including several fatalities. Reports of rabid European ferrets are also on the increase. When European ferrets establish "feral" populations, domestic poultry, waterfowl, game birds, rabbits and other species are at substantial risk. At this time, a California Legislature Assembly Bill has been introduced to change the status of the European ferret from a …
Monitoring Wildlife Damage Management Pesticides, The Role Of The California Department Of Fish And Game, Robert C. Hosea
Monitoring Wildlife Damage Management Pesticides, The Role Of The California Department Of Fish And Game, Robert C. Hosea
Vertebrate Pest Conference Proceedings: 16th (1994)
The Pesticide Investigations Unit (PIU) of the California Department of Fish and Game is responsible for identifying and mitigating the hazards of pesticides to fish and wildlife. By conducting annual reviews of individual county vertebrate pest control plans, investigating pesticide related fish and wildlife losses and reviewing all pesticides proposed for registration in California, the PIU monitors potential effects of vertebrate toxicants on fish and wildlife. The California Department of Fish and Game is working in conjunction with other state and local agencies, manufacturers and applicators to develop balanced, safe pest control programs which provide maximum protection to California's fish …
Biological Management (Control) Of Vertebrate Pests-Advances In The Last Quarter Century, Scott E. Hygnstrom, Kurt C. Vercauteren, Thomas R. Schmaderer
Biological Management (Control) Of Vertebrate Pests-Advances In The Last Quarter Century, Scott E. Hygnstrom, Kurt C. Vercauteren, Thomas R. Schmaderer
Vertebrate Pest Conference Proceedings: 16th (1994)
In 1967, Howard provided a review of biological control of vertebrate pests. The term "biological control" was borrowed from the field of entomology, where it has been traditionally defined as "the reduction in number or density of pests through biological processes such as predation, pathogens, habitat modification, and fertility control." Current philosophy in wildlife damage management advocates "the reduction of damage to a tolerable level" rather than "the reduction of the number or density of vertebrate pests." Therefore we abdicate the term "biological control" and encourage the use of a new term, "biological management" of wildlife damage. Advances in science …
Efficacy Of Five Burrow Fumigants For Managing Black-Tailed Prairie Dogs, Scott E. Hygnstrom
Efficacy Of Five Burrow Fumigants For Managing Black-Tailed Prairie Dogs, Scott E. Hygnstrom
Vertebrate Pest Conference Proceedings: 16th (1994)
Current limitations on pesticides for managing prairie dog populations underscore the need for additional research on candidate compounds. I conducted this study to determine the efficacy and cost-effectiveness of two registered burrow fumigants (aluminum phosphide and gas cartridges) and three unregistered burrow fumigants (methyl bromide, chloropicrin, and a methyl bromide/chloropicrin mixture) for managing black-tailed prairie dogs. All five fumigants reduced burrow activity 94% to 97%, as measured by a plugged burrow technique. Total costs for materials and labor for the registered products, excluding application equipment, were nearly twice ($30.00 to $38.50) the cost of the unregistered fumigants ($15.25 to $16.25).
Present Status Of Rattus Norvegicus On Santa Cruz Island, Galapagos, Ecuador, Gillian Key, Elizabeth Wilson, Jules Conner
Present Status Of Rattus Norvegicus On Santa Cruz Island, Galapagos, Ecuador, Gillian Key, Elizabeth Wilson, Jules Conner
Vertebrate Pest Conference Proceedings: 16th (1994)
Introduced commensal rodents have had a major impact on the biota of island communities worldwide; the ship rat (Rattus rattus) and the house mouse (Mus domesticus) have a long history in the Galapagos islands, while the larger, more aggressive brown rat (Rattus norvegicus was identified only in 1983 on one island, Santa Cruz. By 1988 it had spread into the agricultural zone but was still restricted to human habitation. In 1993 the cross-island road and village communities in the agricultural zone of Santa Cruz were sampled using a standard trap line of break-back traps. House surveys were also carried out, …
Effects Of Cs2-Starch Xanthate On Consumption By Rats, Ann E. Koehler, Mark E. Tobin, Robert T. Sugffiara
Effects Of Cs2-Starch Xanthate On Consumption By Rats, Ann E. Koehler, Mark E. Tobin, Robert T. Sugffiara
Vertebrate Pest Conference Proceedings: 16th (1994)
We conducted a series of preliminary feeding trials with Norway rats (Rattus norvegicus), roof rats (/?. rattus), and Polynesian rats (R. exulans) to examine the effects of carbon disulfide (CS2) on consumption of nontoxic foods. We formulated CS2 at target concentrations of 10 ppm in deionized water, and of 50 ppm to 100,000 ppm in a starch xanthate matrix. However, we did not analyze actual concentrations of CS2 in the test foods or measure its rate of volatilization, and thus cannot verify the levels of CSj the rats were exposed to. CS2 diluted …
California Ground Squirrels At Concord Naval Weapons Station: Alternatives For Control And The Ecological Consequences, Ivette Loredo-Prendeville, Dirk Van Vuren, Amy J. Kuenzi, Michael L. Morrison
California Ground Squirrels At Concord Naval Weapons Station: Alternatives For Control And The Ecological Consequences, Ivette Loredo-Prendeville, Dirk Van Vuren, Amy J. Kuenzi, Michael L. Morrison
Vertebrate Pest Conference Proceedings: 16th (1994)
This paper presents a methodological approach that was recently developed to determine alternatives for control of California ground squirrels (Spermophilus beecheyi) and the resulting ecological consequences at the Concord Naval Weapons Station (CNWS). The U.S. Navy initiated this study upon determining a need to control ground squirrels for safety reasons. The squirrel's ecological role at CNWS was examined by estimating squirrel abundance and distribution throughout CNWS, analyzing predator diets, and determining the squirrel's relationship to the California tiger salamander (Ambystoma californiense). In addition, the efficacy of live capture and translocation of squirrels as a possible control …
Trends In Mountain Lion Depredation And Public Safety Threats In California, Terry M. Mansfield, Steven G. Torres
Trends In Mountain Lion Depredation And Public Safety Threats In California, Terry M. Mansfield, Steven G. Torres
Vertebrate Pest Conference Proceedings: 16th (1994)
The mountain lion (Felis concolor) is widely distributed in California over at least 80,000 square miles of a variety of habitats. Trends in lion damage to property and threats to public safety have increased in recent years. The Department of Fish and Game has documented confirmed damage to property caused by lions since 1972. In 1972, there were four depredation permits issued and one mountain lion taken, while in 1993 there were 192 permits issued and 74 lions taken. Four verified incidents of mountain lions injuring humans have occurred in California since 1985. All four incidents involved children and …
Grower Practices For Blackbird Control In Wild Rice In California, Daniel B. Marcum, W. Paul Gorenzel
Grower Practices For Blackbird Control In Wild Rice In California, Daniel B. Marcum, W. Paul Gorenzel
Vertebrate Pest Conference Proceedings: 16th (1994)
We surveyed 29 wild rice growers, representing 96% of the California acreage grown in 1993, to determine current practices for blackbird damage control. Twenty-seven growers (93%) had blackbird damage. The period of greatest damage and most intensive control was July through September. Red-winged blackbirds (Agelaius phoeniceus) most frequently caused damage, but three other species of blackbirds and the European starling (Sturnis vulgaris) were also identified. Most growers (72%) reported 1 to 10% yield loss. Average loss ranged from $121 to $309/ha, and from $14,530 to $32,061/grower. Most growers (97%) attempted to control blackbirds for an average of 3.5 months …
Current (1994) Ground Squirrel Control Practices In California, Rex E. Marsh
Current (1994) Ground Squirrel Control Practices In California, Rex E. Marsh
Vertebrate Pest Conference Proceedings: 16th (1994)
Current control practices are discussed for the California ground squirrel (Spermophilus beecheyi) which is considered a major rodent pest to agriculture. The primary control options are poison baits, burrow fumigation and trapping. The effectiveness of baits and fumigants is linked closely with the squirrel's annual life cycle, hence knowledge of their cycle is essential. The elements of the squirrel's life cycle importance to management are given in detail. Habitat modification and other methods useful in select instances are provided, along with control strategies within the context of integrated pest management.
Developing An Electrified Fence To Exclude Rabbits From Crops, Gordon Mckillop, Dylan Poole
Developing An Electrified Fence To Exclude Rabbits From Crops, Gordon Mckillop, Dylan Poole
Vertebrate Pest Conference Proceedings: 16th (1994)
The effectiveness of a new design of electric strained wire fence (CSL fence) for managing rabbits is currently being assessed in a two year trial. It is being compared with a commercially available electric netting fence (Flexinet fence) and also with farmers' normal control methods. The study is taking place on commercial farms in Cornwall, England, where the fences are being erected to protect fields of cauliflower. The amount of rabbit damage to individual plants in each field is being assessed and the numbers of rabbits feeding in these fields are being counted. Plant yields at harvest will also be …
Improving Aerial Control Of Possums By Precision Bait Delivery, David R. Morgan
Improving Aerial Control Of Possums By Precision Bait Delivery, David R. Morgan
Vertebrate Pest Conference Proceedings: 16th (1994)
Aerial delivery of 1080 (sodium monofluoroacetate) baits is the main technique for reducing populations of New Zealand's foremost vertebrate pest, the Australian brushtail possum, in large areas of inaccesible country. Surveys after pilot-controlled aerial sowing of baits in seven operations in forests showed that inaccurate navigation along the swaths left up to half the target zone untreated. Kill was estimated to average 75 %. Inadequate coverage with baits was therefore believed to be a major factor in the survival of possums during aerial control operations. This was confirmed in field trials using rhodamine B as a biomarker to reveal acceptance …
Wolf Depredation Management In Relation To Wolf Recovery, Carter C. Niemeyer, E.E. Bangs, S.H. Fritts, J.A. Fontaine, M.D. Jimenez, W.G. Brewster
Wolf Depredation Management In Relation To Wolf Recovery, Carter C. Niemeyer, E.E. Bangs, S.H. Fritts, J.A. Fontaine, M.D. Jimenez, W.G. Brewster
Vertebrate Pest Conference Proceedings: 16th (1994)
By 1930, wolves were extirpated from the western United States for livestock protection. In 1973, the Endangered Species Act protected wolves, and by 1980, wolf recolonization began in Montana. Confirmed livestock losses have been 17 cattle and 12 sheep with 16 wolves controlled as part of a program to enhance the recovery of non-offending wolves. ADC has: 1) controlled problem wolves, 2) improved communication with affected publics and governmental agencies, and 3) enhanced wolf recovery in Montana.
An Overview Of Avian Predation And Management Techniques At Fish-Rearing Facilities, James A. Parkhurst
An Overview Of Avian Predation And Management Techniques At Fish-Rearing Facilities, James A. Parkhurst
Vertebrate Pest Conference Proceedings: 16th (1994)
As the aquaculture industry continues to expand in the United States, so too do the losses attributed to wildlife depredation. Because the industry is so diverse and the various types of culture are characterized by unique designs, operations, and arrays of cultured species, there is a need for corresponding uniqueness in predator management strategies and techniques. It is unlikely that, at any time in the near future, one universal method or approach will be developed to successfully resolve wildlife depredation problems in all facilities. However, numerous areas for improvement currently exist where potential reductions in the extent of loss can …