A low dam or barrier built in water to catch fish or direct their movement, often woven from branches.
From Old English 'fisc' + 'weir' from Old English 'wer' (to defend). One of humanity's oldest fishing technologies, appearing in archaeological sites.
Indigenous peoples in the Pacific Northwest engineered remarkably sophisticated fishweirs that exploited tidal patterns and fish behavior—some designs were so effective they've been continuously used for over 3,500 years.
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