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Shark barrier
A shark barrier (otherwise known as a ‘shark-proof enclosure’ or ‘beach enclosure’) is seabed-to-surface protective barrier that is placed around a beach to protect people from shark attacks. Often confused with shark nets, shark barriers form a fully enclosed swimming area that prevents sharks from entering (nets aim to reduce shark populations).〔Meerman, R. “Shark nets vs shark enclosures”. ABC Science, 2009. Taken from: http://www.abc.net.au/science/articles/2002/03/07/2116717.htm. (10/01/15 ).〕 Shark barrier design has evolved from rudimentary fencing materials to netted structures held in place with buoys and anchors. Recent designs have used plastics to increase strength, versatility and to reduce the environmental damage of bycatch.
==Shark barriers vs shark nets==
Shark barriers are commonly mistaken for shark nets.〔Meerman, R. “Shark nets vs shark enclosures”. ABC Science, 2009. Taken from: http://www.abc.net.au/science/articles/2002/03/07/2116717.htm. (10/01/15 ).〕 While they have the same objective of protecting swimmers, they have very different methods. Shark barriers use an exclusion method, whereas shark nets use a culling method.
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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