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Full-Text Articles in Physical Sciences and Mathematics
Wildlife-Caused Losses Of Agricultural Commodities In 1994 With Emphasis On The Great Plains, A.P. Wywialowski
Wildlife-Caused Losses Of Agricultural Commodities In 1994 With Emphasis On The Great Plains, A.P. Wywialowski
Great Plains Wildlife Damage Control Workshop Proceedings
The USDA, National Agricultural Statistics Service (NASS) surveyed 16,000 agricultural producers in January 1995. Of 10,144 respondents nationwide, 58% reported wildlife-caused losses of their commodities, an increase from 55% in 1989. Based on the median value of all producers' estimates of their losses, wildlife-caused losses cost producers approximately $591 million in 1994, $130 million more than in 1989. Losses presented are based on median producer estimates which have been shown to be consistent with field-measured estimates of damage. Because the dollar value of losses are based on median estimates, extremes of reported losses do not affect these results. If all …
Impact Of Preventive Aerial Coyote Hunting On Sheep Losses To Coyote Predation, Kimberly K. Wagner, Michael R. Conover
Impact Of Preventive Aerial Coyote Hunting On Sheep Losses To Coyote Predation, Kimberly K. Wagner, Michael R. Conover
Great Plains Wildlife Damage Control Workshop Proceedings
Coyote (Canis latrans) predation is a serious problem for livestock producers in the Western U.S. In Utah, Idaho, and Wyoming, 34% of all producer-reported sheep and lamb losses were to coyote predation, amounting to $4.8 million in losses during 1995. Although preventive aerial hunting is commonly used by agriculture agencies in the Intermountain West to reduce coyote (Canis latrans) predation on sheep (Ovis aries), only limited data are available on the efficacy of the technique. We assessed the impact of winter (January - March) aerial coyote hunting on sheep losses to coyotes and the …
Development And Registration Of A Practical Tranquilizer Trap Device (Ttd) For Foot-Hold Traps, Doris E. Zemlicka, D. Pete Sahr, Peter J. Savarie, Frederick F. Knowlton, F. Sherman Blom, Jerrold L. Belant
Development And Registration Of A Practical Tranquilizer Trap Device (Ttd) For Foot-Hold Traps, Doris E. Zemlicka, D. Pete Sahr, Peter J. Savarie, Frederick F. Knowlton, F. Sherman Blom, Jerrold L. Belant
Great Plains Wildlife Damage Control Workshop Proceedings
Foot-hold traps can be used to selectively capture coyotes (Canis latrans) and wolves (C. lupus). However, injuries to captured animals sometimes occur when they struggle to escape. Tranquilizer trap devices (TTDs) reduce struggling and injuries but prototype TTDs were too expensive for widespread use by Animal Damage Control (ADC) operational personnel. For this reason, the Pocatello Supply Depot (PSD) and the National Wildlife Research Center (NWRC) are investigating alternative TTD designs. A molded-rubber TTD will be available from the PSD for coyotes, and the NWRC continues to explore other cheaper TTD designs. A practical TTD design …
The Coyote As An Ecological Model, Thomas A. Eddy, Cindy M. Moore
The Coyote As An Ecological Model, Thomas A. Eddy, Cindy M. Moore
Great Plains Wildlife Damage Control Workshop Proceedings
Teachers (K-12) in a prairie ecology workshop in Kansas used the coyote as the focus for the design of an educational strategy to integrate many concepts and principles of ecology into the various subject areas of the curriculum. A topical outline was developed as a guide for implementing the study.
Cue Enhancement Of Lithium-Chloride-Induced Mutton/Sheep Aversions In Coyotes, Ray T. Sterner
Cue Enhancement Of Lithium-Chloride-Induced Mutton/Sheep Aversions In Coyotes, Ray T. Sterner
Great Plains Wildlife Damage Control Workshop Proceedings
In an enclosure-type study, I investigated the use of odor, auditory, and visual cues to enhance lithium-chloride (LiCl)- induced prey aversion in coyotes (Canis latrans). Eight adult, male, wild-caught coyotes that killed 2 adult sheep during successive daily, 1 -hr trials were assigned to LiCl- and sodium-chloride (NaCl)-bait groups. The 4 LiCl-bait coyotes were sequentially presented with leg-of-sheep and whole-sheep carcasses injected with a 33% LiCl water solution (4.5 ml/kg) 1 -hr daily until bait shy. The 4 NaCl coyotes were exposed to baits and carcasses injected with 25% NaCl/water solution (4.5 ml/kg) for matched trials. Additionally, 2 …
Current Research On Improving Capture Devices For Coyotes, Robert L. Phillips, Kenneth S. Gruver
Current Research On Improving Capture Devices For Coyotes, Robert L. Phillips, Kenneth S. Gruver
Great Plains Wildlife Damage Control Workshop Proceedings
Nine types of footsnares were tested on captive coyotes (Canis latrans) at the United States Department of Agriculture Predator Research Facility. Preliminary results indicate that the E-Z Lee, Nelson, Freemont, and Godwin leg snares can be effective in restraining coyotes while causing only minor leg injuries. Additional testing will be required to determine the effectiveness of these devices in different field situations. Four types of coyote leg-hold traps were evaluated to determine the injuries they inflict on captured coyotes. The No. 3 1/2 McBride padded trap caused the least injury in comparison to 3 other trap models that …
Canine And Gray Fox Rabies Epizootics In Texas, Keith A. Clark, Pamela J. Wilson
Canine And Gray Fox Rabies Epizootics In Texas, Keith A. Clark, Pamela J. Wilson
Great Plains Wildlife Damage Control Workshop Proceedings
In 1994, 2 ongoing rabies epizootics were declared a state health emergency: canine rabies in South Texas and gray fox (Urocyon cinereoargenteus) rabies in West-Central Texas. Prior to 1988, rabid coyotes (Canis latrans) were infrequently reported in Texas. In 1988, Starr and Hidalgo counties, located in extreme South Texas, experienced an epizootic of canine rabies resulting in 11 laboratory-confirmed cases of canine rabies in domestic dogs (Canis familiaris) and 6 cases in coyotes. By 1991, the epizootic had expanded approximately 160 km north of the United States (US)-Mexico border and included 10 counties. During …
The Oral Rabies Vaccination Project And The Experimental Use Of Raboral V-Rg In The South Texas Canine Rabies Epizootic, M. Gayne Fearneyhough
The Oral Rabies Vaccination Project And The Experimental Use Of Raboral V-Rg In The South Texas Canine Rabies Epizootic, M. Gayne Fearneyhough
Great Plains Wildlife Damage Control Workshop Proceedings
Beginning in October 1988, Texas experienced the onset of an expanding epizootic of canine rabies in far South Texas. That epizootic now involves 18 counties, with 522 laboratory confirmed cases as of December 1994. Approximately 50% of those cases have occurred in coyotes (Canis latrans) and most of the remainder in domestic dogs. Forty-three "spill over" cases have been reported in 7 other species, both wild and domestic. Since 1988, over 1600 people in South Texas have received postexposure rabies treatment due to potential exposure to a rabid animal and 2 human deaths have been attributed to this virus strain. …
Using Telemetry Equipment For Monitoring Traps And Snares, Thomas D. Halstead, Kenneth S. Gruver, Robert L. Phillips, Richard E. Johnson
Using Telemetry Equipment For Monitoring Traps And Snares, Thomas D. Halstead, Kenneth S. Gruver, Robert L. Phillips, Richard E. Johnson
Great Plains Wildlife Damage Control Workshop Proceedings
Specialized radio transmitters were developed for use in monitoring large mammal trap and snare activity. Prototype devices were manufactured by 4 wildlife telemetry companies based on specifications we developed in consultation with electronic engineering personnel. Power outputs from individual transmitters ranged from 10 to 100 milliwatts (mw). Range testing in the gently rolling terrain of northeastern Colorado indicated that ground-tracking distances with truck-mounted dual beam antennas exceeded 40 km. Field tests were conducted using transmitters with traps and foot snares set for coyotes (Canis latrans) in California, black bears (Ursus americanus) in Oregon, and mountain lions …
Curbing The Illegal Use Of Pesticides In Predator Control, Jeff Jacoby, Martin Fletcher, Ted Warfield
Curbing The Illegal Use Of Pesticides In Predator Control, Jeff Jacoby, Martin Fletcher, Ted Warfield
Great Plains Wildlife Damage Control Workshop Proceedings
In June 1993, the Agricultural Products Group of FMC responded to reports of alleged illegal, off-label use of its product Furadan 4F and other pesticide products in baiting and poisoning predators. The target of these reported illegal carcass-baiting incidents were principally coyotes (Canis latrans), which cause significant losses to the sheep industry. The FMC undertook an effort to determine the scope of the problem and how best to address the issue. This included conducting extensive measurable research among sheep ranchers and agrichemical dealers in 4 selected pilot states: Colorado, Montana, South Dakota, and Wyoming. Qualitative interviews were also …