Fish the primary source of nutrition in medieval Northern Ostrobothnia
(PHYSorg.com Archaeology & Fossils)

Researchers have investigated the diet of people buried in the Ii Hamina cemetery from the 15th to the 17th centuries by analysing isotopes in the bones of the deceased. Isotopes preserve information on the various nutrient sources used by humans during their lifetimes. A study published in the Environmental Archaeology journal reveals that the dominant protein source was small fish such as roach or Baltic herring.