The use of stone tidal weirs to catch fish has a long history, in Ireland, fish traps in association with weirs have been found that date from from 8,000 years ago.
The use of stone tidal weirs to catch fish has a long history, dating back to the pre-sapiens phase of hominid evolution. In Ireland, fish traps in association with weirs have been found that date from from 8,000 years ago.