Fish Weir - Ancient Fishing Tool of Hunter-Gatherers

An 8,000 Year Old Fishing Technology

Deer Island Fish Weir in the Fog (New Brunswick, Canada)
Deer Island Fish Weir in the Fog (New Brunswick, Canada). Leonora Enking

A fish weir or fish trap is structure built of stone, reeds or wooden posts placed within the channel of a stream or at the edge of a tidal lagoon intended to capture fish as they swim along with the current. Fish traps on rivers or streams are circular, wedge-shaped or ovoid rings of posts or reeds, with an upstream opening. The posts are often connected by basketry netting or wattle fences: the fish swim in and are trapped within the circle or upstream of the current.

Tidal fish traps are solid low walls of boulders or blocks built across gullies: the fish swim across the top of the wall at spring high tides, and as the water recedes with the tide, they're trapped behind it. Fish weirs are sometimes thought of as fish farming (sometimes "aquaculture"), since the fish can live in the trap for a period until they are harvested. Often, according to ethnographic research, the fish weir is dismantled on a seasonal basis, allowing the fish to freely spawn.

Some evidence of their ancient and continuing use is found in the wide variety of names still used for fish weirs: fish impoundment, tidal weir, fishtrap or fish-trap, weir, yair, coret, gorad, kiddle, visvywer, fyshe herdes, passive trapping.

Inventing Fish Weirs

Fish weirs were invented by complex hunter gatherers all over the world during the Mesolithic of Europe, the Archaic period in North America, the Jomon in Asia, and other similarly dated hunter-gatherer cultures around the world.

Regional differences are apparent in construction techniques or materials used, species harvested and of course terminology, but the basic format and theory is the same world-wide. Fish weirs vary in size from a small temporary brush framework to an extensive complex of stone walls and channels.

Fish traps were used well into the historic period by many groups, and ethnographic information about fish weir use has been gathered from North America, Australia and South Africa.

Historical data has also been collected from medieval period fish weir use in the UK and Ireland. What we've learned from these studies gives us information about the methods of fish trapping, but also the importance of fish to hunter-gatherer societies and at least a glimmer of light into the "traditional ways of life".

Dating Fishtraps

Fish weirs are best dated by radiocarbon assays on wooden stakes or basketry which were used to construct the trap. Fish bone assemblages from adjacent middens can be used as evidence of use, as can organic sediments such as pollen or charcoal in the bottoms of traps. Other methods used by scholars include identifying local environmental changes such as changing sea level or the formation of sand bars that would impact the weir's use.

  • The earliest known fish traps are from Mesolithic sites in marine and freshwater locations in the Netherlands and Denmark, dated to between 8,000-7,000 years ago. In 2012, scholars reported new dates on the Zamostje 2 weirs near Moscow, Russia, of more than 7,500 years ago. Neolithic and Bronze Age wooden structures are known at Wooton-Quarr on the Isle of Wight and along the shores of the Severn estuary in Wales. The Band e-Dukhtar irrigation works of the Achaemenid dynasty of the Persian Empire, which includes a stone weir, dates between 500-330 BC.
  • Muldoons Trap Complex, a stone walled fishtrap at Lake Condah in western Victoria, Australia, was constructed 6600 calendar years ago (cal BP) by removing basalt bedrock to create a bifurcated channel. Excavated by the Monash University and the local Gundijmara Aboriginal community, Muldoons is an eel-trapping facility, one of many located near Lake Condah. It has a complex of at least 350 meters of constructed channels running along an ancient lava flow corridor. It was used as recently as the 19th century to trap fish and eels, but excavations reported in 2012 included AMS radiocarbon dates of 6570-6620 cal BP.
  • The earliest weirs in Japan are currently associated with the transition from hunting and gathering to farming, generally at the end of the Jomon period (ca. 2000-1000 BC).
  • In southern Africa, stone-walled fishtraps (called visvywers) are known but not direct-dated as of yet. Rock art paintings and fish bone assemblages from marine sites suggest dates between 6000 and 1700 BP.
  • Fish weirs are also recorded in several locations in North America. The oldest appears to be the Sabasticook Fish Weir in central Maine, where a stake returned a radiocarbon date of 5080 RCYPB (5770 cal BP). Glenrose Cannery at the mouth of the Fraser River in British Columbia dates ~4000-4500 RCYBP (4500-5280 cal BP). Fish weirs in southeastern Alaska date to ca. 3,000 years ago.


A Few Archaeological Fish Weirs

  • Asia: Asahi (Japan), Kajiko (Japan)
  • Australia: Muldoons Trap Complex (Victoria), Ngarrindjeri (South Australia)
  • Middle East/West Asia: Hibabiya (Jordan), Band-e Dukhtar (Turkey)
  • North America: Sabasticoook (Maine), Boylston Street Fish Weir (Massachusetts), Glenrose Cannery (British Columbia), Big Bear (Washington), Fair Lawn-Paterson Fish Weir (New Jersey)
  • UK: Gorad-y-Gyt (Wales), Wooton-Quarry (Isle of Wight), Blackwater estuary weirs (Essex)
  • Russia: Zamostje 2


This glossary entry is a part of the Guide to Archaeology Site Types and part of the Dictionary of Archaeology.

Avery G. 1975. Discussion on the Age and Use of Tidal Fish-Traps (Visvywers). The South African Archaeological Bulletin 30(119/120):105-113.

Bannerman N, and Jones C. 1999. Fish-trap types: a component of the maritime cultural landscape. International Journal of Nautical Archaeology 28(1):70-84. doi:10.1111/j.1095-9270.1999.tb00823.x

Bowen G. 1998. Towards a Generic Technique for Dating Stone Fish Traps and Weirs. Australian Archaeology 47:39-43.

Eldridge M, and Acheson S. 1992. The antiquity of fish weirs on the southern coast: a response to Moss, Erlandson, and Stuckenrath. Canadian Journal of Anthropology 16:112-116.

Jeffery B. 2013. Reviving Community Spirit: Furthering the Sustainable, Historical and Economic Role of Fish Weirs and Traps. Journal of Maritime Archaeology 8(1):29-57.


Kennedy D. 2011. Recovering the past from above Hibabiya - an Early Islamic village in the Jordanian desert? Arabian Archaeology and Epigraphy 22(2):253-260. doi:10.1111/j.1600-0471.2011.00339.x

Losey R. 2010. Animism as a Means of Exploring Archaeological Fishing Structures on Willapa Bay, Washington, USA.

Cambridge Archaeological Journal 20(01):17-32. doi:10.1017/S0959774310000028

McNiven IJ, Crouch J, Richards T, Dolby N, and Jacobsen G. 2012. Dating Aboriginal stone-walled fishtraps at Lake Condah, southeast Australia. Journal of Archaeological Science 39(2):268-286. doi:10.1016/j.jas.2011.09.007

O'Sullivan A. 2003. Place, Memory and Identity among Estuarine Fishing Communities: Interpreting the Archaeology of Early Medieval Fish Weirs. World Archaeology 35(3):449-468.

Peterson JB, Robinson BS, Belknap DF, Stark J, and Kaplan L. 1994. An Archaic and Woodland period fish weir complex in central Maine. Archaeology of Eastern North America 22(197-222).

Ross PJ. 2009. Ngarrindjeri Fish Traps of the Lower Murray Lakes and Northern Coorong Estuary, South Australia [MSc, Maritime Archaeology]. School of Humanities: Flinders University of South Australia.

Saha RK, and Nath D. 2013. Indigenous technical knowledge (ITK) of fish farmers at Dhalai district of Tripura, NE India. Indian Journal of Traditional Knowledge 12(1):80-84.

Takahashi R. 2009. Symbiotic relations between paddy-field rice cultivators and hunter-gatherer-fishers in Japanese prehistory: Archaeological considerations of the transition from the Jomon Age to the Yayoi Age.

In: Ikeya K, Ogawa H, and Mitchell P, editors. Senri Ethnological Studies. p 71-98.