**2. Method**

This study comprised two periods of data collection, between 2006 and 2010, when visits and interviews were performed in two Amazonia riverine communities that have different geographies and social dynamics. The Araraiana community is located in Ponta de Pedras city in the Marajó archipelago, and the Piriquitaquara community is on Combu Island and belongs to the insular area of Belém. The data form the database of the Laboratory of Ecology of Human Development, which has been conducting scientific studies on the development of Amazonia riverine families.
