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Radio activated guard (RAG) boxes are experimental pest control devices intended to deter wolves from preying on livestock. Specifically, they are designed to work against wolves which have been fitted with radio tracking collars prior to being re-released into the wild (and, by extension, the packs of which they are members). The device was conceived by Edward Cummings, a rancher from Montana, who suggested that a hazing device could be tuned to a radio collar's frequency; after discussions with ranchers, the specifications of the device were designed and prototyped by Dr. John Shivik, then with the United States Department of Agriculture Wildlife Services, National Wildlife Research Center.〔Marguerite, H. 2000. Wolves at the door: Can we learn to dance with wild things again? Discover June, 2000 59-65〕 Very few of the devices have been produced for commercial sale. The RAG box is a "disruptive stimulus device."〔Shivik, J. A., and D. J. Martin. 2000. Aversive and disruptive stimulus applications for managing predation. Proceedings of the Ninth Eastern Wildlife Damage Management Conference.〕 It uses a strobe light and two loudspeakers which emit an annoying noise; these are activated when the box detects the signal from a radio collar at short range, and scare off the wolf pack. The boxes were subjected to limited testing on wolves in Idaho and researchers concluded that they are effective for protecting livestock in small pastures; the technology is thought to be limited, however, because of the complexity of the device and its price.〔Breck, S., R. Williamson, C. Niemeyer, and J. A. Shivik. 2003. Non-lethal radio activated guard for deterring wolf depredation in Idaho: summary and call for research. Pages 223-226 in Proceedings of the 20th Vertebrate Pest Conference (R. M. Timm and R. H. Schmidt, eds)〕 ==See also== *Electronic pest control 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Radio-activated guard box」の詳細全文を読む スポンサード リンク
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