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Articles 4711 - 4740 of 6622
Full-Text Articles in Environmental Health and Protection
Eradication Of Feral Goats And Sheep From Island Ecosystems, Dirk Van Vuren
Eradication Of Feral Goats And Sheep From Island Ecosystems, Dirk Van Vuren
Proceedings of the Fifteenth Vertebrate Pest Conference 1992
Feral goats (Capra hircus) and feral sheep (Ovis aries) occur on numerous islands throughout the world and cause severe damage to island resources. Damage includes large-scale alteration of plant communities, negative impacts on insular endemic species of plants and animals, and damage to soils and cultural resources. Complete eradication is the best solution to the problem. Proposed control techniques include poisons, predators, diseases, sterilization, trapping, and shooting from the air, but experience shows that shooting from the ground, combined with the use of dogs, Judas goats, and perhaps fencing, is the best approach in most cases. …
An Evaluation Of 4-Aminopyridine Baits Coated To Delay Reaction Time, Kelly F. Swindle
An Evaluation Of 4-Aminopyridine Baits Coated To Delay Reaction Time, Kelly F. Swindle
Proceedings of the Fifteenth Vertebrate Pest Conference 1992
In cold weather and early mornings, birds feeding on Avitrol® baits treated with 0.5, 1.0 and 3.0% (percent) 4- aminopyridine have shown reaction times as short as four minutes (reaction times of seven to ten minutes are common). Relatively fast reaction times, staggered arrival times of a flock at feeding sites, and delayed feeding by some members of a flock continue to result in premature reactions which frighten birds from the treated bait resulting in insufficient numbers reacting to give the desired repellency. This paper reports preliminary results of an effort to slow chemical absorption in an attempt to minimize …
Alpha-Chloralose Efficacy In Capturing Nuisance Waterfowl And Pigeons And Current Status Of Fda Registration, Paul P. Woronecki, Richard A. Dolbeer, Thomas W. Seamans, William R. Lance
Alpha-Chloralose Efficacy In Capturing Nuisance Waterfowl And Pigeons And Current Status Of Fda Registration, Paul P. Woronecki, Richard A. Dolbeer, Thomas W. Seamans, William R. Lance
Proceedings of the Fifteenth Vertebrate Pest Conference 1992
During 1990 and 1991 we conducted safety, efficacy and clinical trials required to register alpha-chloralose (A-C) for capturing nuisance waterfowl and pigeons with the U.S. Food and Drug Administration (FDA). We determined the Most Effective Dose (MED) to be 30 and 60 mg of A-C/kg of body weight for capturing waterfowl and pigeons, respectively. We conducted 11 field trials in 4 states, capturing 587 waterfowl and 1,370 pigeons with 8% mortality for ducks, 0% for geese, and 6% for pigeons. We submitted a New Animal Drug Application to FDA in October 1991 and anticipate registration in 1992.
Rejex-It™ Brand Bird Aversion Agents, Peter F. Vogt
Rejex-It™ Brand Bird Aversion Agents, Peter F. Vogt
Proceedings of the Fifteenth Vertebrate Pest Conference 1992
ReJeX-iTTM brand bird aversion agents have been formulated from non-toxic, food-grade ingredients that meet or exceed US Food Chemical Codex (FCC) and US Pharmacopeia (USP) specifications. The products, based on methyl anthranilate (MA) as the active ingredient have been developed in liquid and powder form to cover the widest possible range of applications. EPA/FIFRA registration is being actively pursued for all products.
Rodenticide Ecotoxicology: Pre-Lethal Effects Of Anticoagulants On Rat Behaviour, Paula Cox, R.H. Smith
Rodenticide Ecotoxicology: Pre-Lethal Effects Of Anticoagulants On Rat Behaviour, Paula Cox, R.H. Smith
Proceedings of the Fifteenth Vertebrate Pest Conference 1992
Anticoagulant rodenticides may pose a secondary poisoning hazard to non-target predators and scavengers because of the time-delay between ingestion of a lethal dose and death of a target rodent. We investigated some pre-lethal effects of an anticoagulant rodenticide on the behavior of wild rats in cages and in enclosures. We found that social interactions shortened time to death, that most rats died away from cover and that thigmotactic behavior was reduced in the enclosures. The normal light-dark rhythm was upset in intoxicated rats in both cages and enclosures. Thus pre-lethal effects are likely to alter the exposure of predators and …
The Characteristics And History Of Behavioural Resistance In Inner-City House Mice (Mus Domesticus) In The U.K., Richard E. Humphries, Adrian P. Meehan, Richard M. Sibly
The Characteristics And History Of Behavioural Resistance In Inner-City House Mice (Mus Domesticus) In The U.K., Richard E. Humphries, Adrian P. Meehan, Richard M. Sibly
Proceedings of the Fifteenth Vertebrate Pest Conference 1992
Since 1984 pest control operatives in some inner-city areas in the U.K. have found that house mice have become increasingly difficult to control. Mice in these very localized areas have stopped taking rodenticide bait from bait containers, a phenomenon referred to here as behavioral resistance. We report here preliminary experiments designed to characterize the phenomenon more precisely by comparing West Midlands behaviorally resistant (WMBR) populations with non-resistant (BC) populations in Berkshire. We investigated three hypotheses, that compared with non-resistant populations, resistant mice 1) are less likely to enter conventional live-capture traps; 2) have unusual food preferences; and 3) avoid bait …
A Review Of Available Anticoagulants And Their Use In The United States, William B. Jackson, A.D. Ashton
A Review Of Available Anticoagulants And Their Use In The United States, William B. Jackson, A.D. Ashton
Proceedings of the Fifteenth Vertebrate Pest Conference 1992
Nearly half a century ago anticoagulant rodenticides changed the nature of rodent control. Warfarin, and succeeding first-generation compounds, provided effective and increasingly safe baits for reducing commensal rodent populations. Environmental deficiencies were overridden by these “miracle” chemicals, but excessive and irresponsible use selected for resistant populations. Second-generation compounds with a single-feeding characteristic have controlled such resistant populations, at least initially. But use extensions to crop and field areas have been held back by registration requirements, costs, and concerns over local effects on predators. New compounds, formulations, and applications in the near future are likely to be quite limited.
The Effectiveness Of Difethialone (Lm 2219) For Controlling Norway Rats And House Mice Under Field Conditions, Edward F. Marshall
The Effectiveness Of Difethialone (Lm 2219) For Controlling Norway Rats And House Mice Under Field Conditions, Edward F. Marshall
Proceedings of the Fifteenth Vertebrate Pest Conference 1992
Under an Environmental Protection Agency Experimental Use Permit, a pelleted bait containing 0.0025% (25 ppm) of the new anticoagulant difethialone was tested to determine the effectiveness in controlling Norway rats (Rattus norvegicus) and house mice (Mus musculus). Sixteen (16) individual field studies were conducted in five (5) geographical locations of the United States. The results were conclusive in showing that difethialone bait formulated at 25 ppm was both palatable and efficacious in controlling both Norway rats and house mice under actual field conditions.
Laboratory And Field Evaluation Of Difethialone, A New Anticoagulant Rodenticide, Y. Saxena, Deepak Kumar, Tanuja Bhandari, Hema Bhasin
Laboratory And Field Evaluation Of Difethialone, A New Anticoagulant Rodenticide, Y. Saxena, Deepak Kumar, Tanuja Bhandari, Hema Bhasin
Proceedings of the Fifteenth Vertebrate Pest Conference 1992
The efficacy of the newly developed anticoagulant rodenticide, difethialone was evaluated against various rodent species in laboratory and fields. Difethialone at 0.025% concentration in the form of loose bait (broken wheat and rice + vegetable oil + garlic powder) gave absolute mortality in Rattus rattus, Mus musculus, Funambulus pennanti, and Meriones hurrianae during ‘no-choice’ tests in one day feeding. No significant difference was noted in poison bait intake and mean days to death between two and three days poison feeding. Mean days to death were ranged between 2.9 to 5.70 in all the species tested. In fields, …
Clinical Approach To The Diagnosis Of Diseases And Disorders In Pets And Domestic Animals Sometimes Mistaken For Anticoagulant Toxicosis, Benny J. Woody
Clinical Approach To The Diagnosis Of Diseases And Disorders In Pets And Domestic Animals Sometimes Mistaken For Anticoagulant Toxicosis, Benny J. Woody
Proceedings of the Fifteenth Vertebrate Pest Conference 1992
To differentiate the causes of bleeding disorders requires a basic understanding of the hemostatic process and the proper interpretation of history, physical examination, and laboratory tests. A brief overview of the hemostatic process is presented. Tables and flow charts are provided to assist in developing a sound clinical approach to the bleeding patient through the proper assessment of history, physical examination findings, and laboratory tests. Categories of inherited and acquired bleeding disorders are briefly presented.
Conference Participants
Proceedings of the Fifteenth Vertebrate Pest Conference 1992
Participants came from 32 states, the District of Columbia, and from 11 other countries for a total of 327 registered attendees. The wide representation from the United States and countries throughout the world contributed to the success of the conference by providing a highly diversified group for the exchange of information on research progress, technological advances, management strategies, new products and materials, prevailing management philosophies, the protection of endangered species, and a range of other vertebrate pest topics.
Field Efficacy Evaluation Of Pelleted Strychnine Baits For Control Of Mountain Beavers (Aplodontia Rufa), D.L. Campbell, J.P. Farley, R.M. Engeman
Field Efficacy Evaluation Of Pelleted Strychnine Baits For Control Of Mountain Beavers (Aplodontia Rufa), D.L. Campbell, J.P. Farley, R.M. Engeman
Proceedings of the Fifteenth Vertebrate Pest Conference 1992
Radio-telemetry evaluation of several concentrations of pelleted strychnine bait in earlier tests indicated moderate to good bait efficacy for control of mountain beavers. Evaluation of operational baiting with 0.0%, 0.15%, 0.50%, and 0.90% strychnine bait pellets was made in 1990 and 1991 on 24 reforestation units in Washington and Oregon. Results of baiting monitored with burrow activity indicators showed there was little difference in reduction of activity among treatments. Chemical assays and pen bioassays showed baits were lethal, but ingestion was often delayed or baits were discarded. Reexamination of test plots 1 year after baiting showed no detectable change in …
Development Of Rodent Control Technology For Confined Swine Facilities, Robert M. Corrigan, Cheryl A. Towell, Ralph E. Williams
Development Of Rodent Control Technology For Confined Swine Facilities, Robert M. Corrigan, Cheryl A. Towell, Ralph E. Williams
Proceedings of the Fifteenth Vertebrate Pest Conference 1992
This paper discusses the development of site-specific baiting technology for controlling the house mouse (Mus musculus) in confined swine facilities utilizing specific rodenticide formulations, bait stations, and baiting strategies. Behavioral research was also conducted to identify primary nesting and travel activities of mice within grower-finishing units. The rodenticide bromadiolone in a block formulation was found to be effective in most baiting trials, and provided resistance to the harsh environment of the swine facility and the necessary versatility for securing baits to minimize hazards to swine. A commercially available tamper resistant bait station was found to be effective for …
Ecological Approach To Managing Problems Caused By Urban Canada Geese, Michael R. Conover
Ecological Approach To Managing Problems Caused By Urban Canada Geese, Michael R. Conover
Proceedings of the Fifteenth Vertebrate Pest Conference 1992
Urban-suburban Canada geese (Branta canadensis) create nuisance problems at their foraging sites by littering them with feces. An ecological approach to the problem involves inducing the geese to use alternate foraging sites by reducing the attractiveness of problem sites. This can be accomplished by reducing the forage quality at the nuisance site by not fertilizing and infrequently mowing the lawn or by replacing the lawn with a less palatable grass species or other ground cover. Further, sites can be made less attractive to geese if they are surrounded by tall trees which make it harder for geese to …
Coyote Control To Protect Endangered San Joaquin Kit Foxes At The Naval Petroleum Reserves, California, Brian L. Cypher, Jerry H. Scrivner
Coyote Control To Protect Endangered San Joaquin Kit Foxes At The Naval Petroleum Reserves, California, Brian L. Cypher, Jerry H. Scrivner
Proceedings of the Fifteenth Vertebrate Pest Conference 1992
We investigated the effectiveness of a coyote (Canis latrans) control program implemented to increase numbers of endangered San Joaquin kit foxes (Vulpes macrotis mutica) at the Naval Petroleum Reserves in California (NPRC). Between 1980 and 1985, the kit fox population on NPRC declined approximately 66% while coyote abundance apparently increased. Coyote predation was identified as the primary cause of mortality for kit foxes. From 1985 to 1990, the U. S. Department of Energy (DOE) sponsored a program to kill coyotes with the objective being to reduce predation on kit foxes and increase fox numbers. Control methods …
Sterilants For Managing The Populations Of Red-Winged Blackbirds (Agelaius Phoeniceus), Andrew Cyr, Diane Lacombe
Sterilants For Managing The Populations Of Red-Winged Blackbirds (Agelaius Phoeniceus), Andrew Cyr, Diane Lacombe
Proceedings of the Fifteenth Vertebrate Pest Conference 1992
Male Red-winged blackbirds (Agelaius phoeniceus) being gregarious, and causing heavy damage to corn crops in the northeast, including southern Québec and Ontario, sterilization has been studied as a mean's to manage their populations. With chemosterilants (thiotepa and Omitrol®) tested, year to year variations in reproductive success occurs. The spermatogenesis is disrupted, but the overall effect is not specific. Biosterilisation with 10.0 μg doses of GnRH-analogue hormones is more specific, and the spermatogenesis is disrupted for at least a month, but several spaced injections were required. No field trials have been done yet.
Unmasking Mascall's Mouse Traps, David C. Drummond
Unmasking Mascall's Mouse Traps, David C. Drummond
Proceedings of the Fifteenth Vertebrate Pest Conference 1992
Twelve mouse traps described and figured by Leonard Mascall in 16th Century England are illustrated and interpreted afresh. Special attention is given to one that is also depicted on the Merode altarpiece, an important 15th Century Dutch painting. Since Mascall's era many of his mouse traps have virtually disappeared. Others have been made more effective by various design changes, including the incorporation of small powerful helical springs and improved release mechanisms, and by the greater use of wire mesh and sheet metal.
The Evaluation Of Alternative Toxins To Sodium Monofluoroacetate (1080) For Possum Control, Charles T. Eason
The Evaluation Of Alternative Toxins To Sodium Monofluoroacetate (1080) For Possum Control, Charles T. Eason
Proceedings of the Fifteenth Vertebrate Pest Conference 1992
Possum control in New Zealand is dependent on the use of sodium monofluroacetate (1080) and cyanide. Although 1080 is highly effective, its use is restricted to government staff. Cyanide is available for a wider group of licensed operators, but cyanide "shyness" reduces its effectiveness. An acute toxicity program has been set up to identify nonanticoagulant toxins that could be used safely by farmers. Dose-ranging studies showed that possums are susceptible to cholecalciferol, calciferol, gliftor, alpha-chloralose, and nicotine, but not to bromethalin. As lethal doses for these toxins have been ascertained, which of them are likely to be cost-effective and safe …
An Integrated Approach To The Management Of Urban Canada Goose Depredations, Steven D. Fairaizl
An Integrated Approach To The Management Of Urban Canada Goose Depredations, Steven D. Fairaizl
Proceedings of the Fifteenth Vertebrate Pest Conference 1992
Canada geese (Branta canadensis) in the Reno-Sparks, Nevada urban area have become a problem of increasing significance. Nuisance complaints from city parks, golf courses, and housing developments augment the bird hazard to aircraft operations at the local airport. Eleven goose collisions with commercial aircraft, between January 1986 and April 1989, caused $250,000 in structural damages but no injuries or loss of human life. The Federal Aviation Administration required action be taken to reduce the hazard if airport certification was to continue. A multi-agency task force was formed to develop and implement an integrated pest management plan. Population surveys …
Toxic Bait And Baiting Strategies For Feral Cats, Charles T. Eason, David R. Morgan, B. Kay Clapperton
Toxic Bait And Baiting Strategies For Feral Cats, Charles T. Eason, David R. Morgan, B. Kay Clapperton
Proceedings of the Fifteenth Vertebrate Pest Conference 1992
To improve feral cat control we developed a dry pelleted toxic bait and evaluated the potential of lures. A polymer fish meal bait was preferred by cats from a range of bait types tested. L-alanine further increased bait acceptance by cats in pen trials and catnip may have the potential to increase field acceptance and target specificity. An oral LD90 of 0.38 mg/ kg was established for sodium monofluoroacetate (1080) in feral cats voluntarily eating surface-loaded baits. Acute toxicity to cats of warfarin, cholecalciferol, and gliftor was tested. However, because the cat proved highly sensitive to 1080, we recommend …
High Frequency Sound Devices Lack Efficacy In Repelling Birds, William A. Erickson, Rex E. Marsh, Terrell P. Salmon
High Frequency Sound Devices Lack Efficacy In Repelling Birds, William A. Erickson, Rex E. Marsh, Terrell P. Salmon
Proceedings of the Fifteenth Vertebrate Pest Conference 1992
Ultrasonic or high-frequency sound-producing devices are marketed as a scaring or frightening method for bird control. Although inaudible to humans, most birds also do not hear in the ultrasonic frequency ranges of above 20,000 Hz, thus the credibility of advertised claims raises questions. A review of efficacy studies conducted and published by a number of researchers fails to demonstrate the usefulness of such bird control devices.
Front Matter And Contents
Proceedings of the Fifteenth Vertebrate Pest Conference 1992
Contents:
The Starling In Europe: Multiple Approaches To A Problem Species , Chris J. Feare, Pierre Douville De Franssu
The Starling In Europe: Multiple Approaches To A Problem Species , Chris J. Feare, Pierre Douville De Franssu
Proceedings of the Fifteenth Vertebrate Pest Conference 1992
In Europe, Starlings are widely distributed and comprise both resident and migrant populations. These cause various kinds of damage which varies with the crops grown in different European Economic Community (EEC) countries. Although EEC member states are governed by the same legislation on bird protection, each state interprets the Community legislation in its own national legislation. This leads to different national approaches to the prevention of Starling damage, with little information exchange between member states. The establishment of an EEC (or wider) working group on bird pests is recommended to coordinate research and development.
Urban Crow Roosts In California, W. Paul Gorenzel, Terrell P. Salmon
Urban Crow Roosts In California, W. Paul Gorenzel, Terrell P. Salmon
Proceedings of the Fifteenth Vertebrate Pest Conference 1992
We reviewed the historical and current status of the American crow (Corvus brachyrhynchos), urban crow roosts and control efforts in California. Crows aggregate in traditional winter roosting areas. In the late 1930s most crows in California roosted in the Sacramento Valley in rural locations. Crow roosts were not a concern except for potential damage to adjacent farmlands. From the 1960s through 1980s crows colonized urban areas for nesting and winter roosting. A phone survey of vertebrate pest management officials indicated all known roosts were in urban areas, with most occurring in the Sacramento Valley. From 1970 to 1989 …
Avitrol Use In The Protection Of Wine Grapes From The House Finch (Linnet) In Sonoma County, Pierre Gadd
Avitrol Use In The Protection Of Wine Grapes From The House Finch (Linnet) In Sonoma County, Pierre Gadd
Proceedings of the Fifteenth Vertebrate Pest Conference 1992
Two field trials were conducted to determine the effectiveness of Avitrol® (4-aminopyridine) mixed grains 0.50% in the repelling of house finches (Carpodocus mexicana) from two vineyards in Sonoma County. In the first trial, two properties were prebaited for twelve and fourteen days respectively. After the removal of the prebait, Avitrol treated grain mixture was then placed in the bait troughs for a period of from two to four days. A count of the house finch (linnets) number visiting the troughs during the prebaiting and treatment phases of the trial was recorded. Subsequent linnet counts were made to determine …
Interactive Computer Kiosks For Vertebrate Ipm—Status Report, Stephen C. Frantz, Robert M. Durlak
Interactive Computer Kiosks For Vertebrate Ipm—Status Report, Stephen C. Frantz, Robert M. Durlak
Proceedings of the Fifteenth Vertebrate Pest Conference 1992
The recent outbreak of raccoon rabies in New York State during a period of unprecedented fiscal constraints presents an emerging organizational dilemma—how to handle increasing demands for services in an environment of diminishing resources. As one response to this need, the New York State Department of Health (DOH) is developing an interactive computer system for integrating public education, professional training and public/professional communication. The basic objective is to enhance consumer access to information regarding rabies, Lyme disease and other public health issues; thereby, forming the basis for prevention. In essence, this effort can be classified as an “educational intervention,” the …
Metoclopramide Hydrochloride Did Not Prevent 1080-Induced Vomiting In Coyotes, Jeffrey S. Green
Metoclopramide Hydrochloride Did Not Prevent 1080-Induced Vomiting In Coyotes, Jeffrey S. Green
Proceedings of the Fifteenth Vertebrate Pest Conference 1992
Vomiting is a characteristic, although undesirable effect when using Compound 1080 (sodium monofluoroacetate) as a method of predator control for coyotes. Compound 1080 meat baits with (treatment) and without (control) an antiemetic, metoclopramide hydrochloride (MH), were fed to captive coyotes to determine whether MH would prevent vomiting. All treatment and control animals died as a result of consuming the 1080 bait with no difference between the groups in time from bait consumption to death. There was no significant difference between the number of treatment and control animals that vomited after consuming the baits. Likewise there was no difference between the …
Closing Remarks For The Fifteenth Vertebrate Pest Conference, Wendy S. Halverson
Closing Remarks For The Fifteenth Vertebrate Pest Conference, Wendy S. Halverson
Proceedings of the Fifteenth Vertebrate Pest Conference 1992
As chair-elect for the 16th Vertebrate Pest Conference it is my responsibility to provide the closing remarks for this conference. In achieving this objective I would like to accomplish three things: summarize the 15th conference, leave you with some thoughts to take home, and provide information and an invitation to the 16th Vertebrate Pest Conference to be held in 1994. At this conference, over the last three days, eighty-one papers have been presented. There were 327 registered participants representing eleven foreign countries and thirty-two states. I would like to take this opportunity to acknowledge the individuals who have worked very …
Reinfestation Of Bandicota Bengalensis (Gray) In Irrigated Field Habitat, B.K. Guruprasad
Reinfestation Of Bandicota Bengalensis (Gray) In Irrigated Field Habitat, B.K. Guruprasad
Proceedings of the Fifteenth Vertebrate Pest Conference 1992
Bandicota bengalensis, a predominant species inhabiting irrigated fields is a potential pest on agricultural crops and is known to live in extensive burrow systems. The burrow opening covered with mud which is an indicator of its activity seems to be discontinuous. An analysis of burrow systems and their occupations indicated reuse of abandoned burrow systems by new entrants. A study simulated in semi-natural conditions supported the view that there is occupation of old burrows by new immigrants. Non-effective barriers; and availability of Panicum repens on bunds, a food alternative may support the population influx. Availability of old burrow systems …
A Review Of The Results From Laboratory Tests Of Some Rodenticides Against Eight Rodent Species, J.E. Gill
A Review Of The Results From Laboratory Tests Of Some Rodenticides Against Eight Rodent Species, J.E. Gill
Proceedings of the Fifteenth Vertebrate Pest Conference 1992
The susceptibility of eight rodent species to a range of widely used and candidate rodenticides was determined in laboratory feeding tests. No choice and choice tests were used to assess toxicity and effect on palatability of the rodenticides to Meriones shawi (Shaw's gerbil), Arvicanthis niloticus (Nile rat), Acomys cahirinus (Egyptian Spiny mouse), Mastomys natalensis (Multimammate rat), Sigmodon hispidus (Cotton rat), Rattus exulans (Polynesian rat), and R. rattus (Ship rat) which responded differently to each chemical. The results of these tests suggest possible rodenticides suitable for control of each species. Field trials are now needed to assess the effectiveness of these …