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Rattlesnake round-up
Rattlesnake round-ups, also known as rattlesnake rodeos are annual events common in the rural Midwest and Southern United States, where the primary attractions are captured wild rattlesnakes which are displayed and then returned to the wild. Rarely, they are used for food or to create animal products such as snakeskin. Rattlesnake round-ups originated in the first half of the 20th century for adventure and excitement, as well as to achieve local extirpation of perceived pest species.〔Means, B. 2009. Effects of rattlesnake roundups on the eastern diamondback rattlesnake (''Crotalus adamanteus''). Herpetological Conservation and Biology 4:132-141.〕 Typically a round-up will also include trade stalls, food, rides, and other features associated with fairs, as well as information on rattlesnake biology, identification, and safety.〔(【引用サイトリンク】url=http://noxenpa.com/snakes.html )〕 Round-ups take place in at least ten states, with largest events in Texas and Oklahoma.〔Fitzgerald, L. A., and C. W. Painter. 2000. Rattlesnake Commercialization: Long-Term Trends, Issues, and Implications for Conservation. Wildlife Society Bulletin 28:235–253.〕 The largest rattlesnake round-up in the United States is held in Sweetwater, Texas. Held every year since 1958, the event currently attracts approximately 30,000 visitors per year and in 2006 each annual Round-Up was said to result in the capture of 1% of the state's rattlesnake population.
Round-ups have economic and social importance to the communities that hold them.〔〔 The events often attract thousands of tourists, which can bring hundreds of thousands of dollars of revenue into small towns; the Sweetwater Round-Up's economic impact was estimated to exceed US$5 million in 2006.〔 Snake collectors often make large profits selling snakes at the events.
Cash prizes and trophies are often given out to participants in categories like heaviest, longest, or most snakes.〔〔 These incentives result in all size classes of snakes being targeted equally.〔 Most roundups target the western diamondback rattlesnake (''Crotalus atrox''), though some events target prairie rattlesnakes (''C. viridis''), timber rattlesnakes (''C. horridus''), or the eastern diamondback rattlesnake (''C. adamanteus'').〔〔Fitch, H.S. 2003. Reproduction in the rattlesnakes of the Sharon Springs, Kansas Roundup. Kansas Journal of Herpetology 8: 23-24.〕
A harvest of several hundred to several thousand kilograms of snakes is typical for many roundups. In Texas, up to 125,000 snakes could have been removed annually from the wild during the 1990s.〔 However, effects of roundups on rattlesnake populations are unclear. Harvest size at roundups is highly variable from year to year but does not show a consistent downward trend, even after decades of annual roundup events in some areas.〔 ''C. atrox'' is listed as Least Concern by the IUCN.〔Frost, D.R., Hammerson, G.A. & Santos-Barrera, G. 2007. ''Crotalus atrox''. The IUCN Red List of
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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