Fish shortage drove medieval fishermen to sea

A new study by James Barrett from Cambridge University's McDonald Institute for Archaeological Research, shows that around 1,000 C.E., medieval people were forced to begin fishing in the ocean due to a shortage of fresh water fish.

By examining the changes in fish bones from various archaeological sites, Barrett concludes that there were no longer enough large freshwater fish available to feed growing populations, forcing people to look elsewhere for food. The study was scheduled to be presented at the Oceans Past II Conference at the University of British Columbia, Vancouver, Canada.