The largest and best-known are those on the Barwon River at Brewarrina, New South Wales, which are at least partly preserved. Most have been completely or partially destroyed. Here, where water levels fluctuate seasonally, they constructed ingenious stone fish traps. Indigenous Australians were, prior to European colonization, most populous in Australia's better-watered areas such as the Murray-Darling river system of the south-east. įish trap, Roman period found in Valkenburg, the Netherlands The existing fish traps that can still be seen have been built during the past 300 years, some as recently as the latter part of the 20th century, whilst others could date as far back as 3,000 years. The Stilbaai Tidal Fish Traps are ancient intertidal stonewall fish traps that occur in various spots on the Western Cape coast of South Africa from Gansbaai to Mosselbaai. This giant trap, built in structural wood, is spread along the coast of southern Adriatic especially in the province of Foggia, in some areas of the Abruzzese coastlines and also in some parts of the coast of southern Tyrrhenian Sea. The trabucco is an old fishing machine typical of the coast of Gargano protected as historical monuments by the homonym National Park. In southern Italy, during the 17th century, a new fishing technique began to be used. Some of this extant stonework survives at Bahia Wulaia at the Bahia Wulaia Dome Middens archaeological site. The prehistoric Yaghan people who inhabited the Tierra Del Fuego area constructed stonework in shallow inlets that would effectively confine fish at low tide levels. It has been described as "the largest fish trap in the world". It is easy for fish from the Atlantic Ocean to swim into the Mediterranean through the narrow neck at Gibraltar, and difficult for them to find their way out. The Mediterranean Sea, with an area of about of 2.5 million km 2 (970,000 sq mi), is shaped according to the principle of a bottle trap. There are essentially two types of trap, a permanent or semi-permanent structure placed in a river or tidal area and bottle or pot trap that are usually, but not always baited to attract prey, and are periodically lifted out of the water. Traps are culturally almost universal and seem to have been independently invented many times. The Mediterranean sea has been described as the world's largest fish trap.
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