Another study (based on blood polymorphisms, from 1981) carried out in one thousand individuals from Porto Alegre city, Southern Brazil, and 760 from Natal city, Northeastern Brazil, found whites of Porto Alegre had 8% of African alleles and in Natal the ancestry of the samples total was characterized as 58% White, 25% Black, and 17% Amerindian". This study found that persons identified as White or Pardo in Natal have similar ancestries, a dominant European ancestry, while persons identified as White in Porto Alegre have an overwhelming majority of European ancestry.