Estimated migration among <i>Proechimys guyannensis</i> and <i>P</i>. <i>cuvieri</i> populations, based on analysis using the Migrate software.

The samples were divided into three regions, the North (from the Oiapoque River to Guyana), Central (Araguari basin in Amapá) and South (Amazon Estuary, Jari and Pará rivers). The plus sign (+) after the name of the region indicates a population receiving immigrants. The highest migration rates are marked in bold type.