This study investigates the artificial lake of the Tucuruí/PA hydroelectric power plant. The main problem is the memory about access and use of fishing resources. Some of the research questions are: does knowledge about the ecosystem prior to the construction of the reservoir allow the confrontation of the local population, that is, the artisan fishermen in relation to the highly modified environment? To what extent knowledge about water resources are incorporated to new knowledge so that different strategies of access and use of fishing resources are created? Which socioenvironmental changes interfere in the collective memory? With these questions in mind, the study aims to identify and analyze collective memory taking into consideration the changes in the natural environment due to the strong impacts of the Tucuruí/PA hydroelectric power plant, in order to identify and analyze the dynamic between the old actors (native) and new (immigrants) and possible scenarios of conflict involving artisanal fishing. The methodology include the choice of 3 of the main fish landing ports (Santa Rosa, Polo Pesqueiro and Porto do Onze) and the use of quanti-qualitative techniques and the application of 80 questionnaires and 50 semi-structured interviews as well as the gathering of documental and bibliographic information prior to the creation of the lake. The theoretical reference refers to society and nature, collective memory and artisanal fishing. The results highlight the dimension of the socioenvironmental impact caused, marked in the collective memory that allows remembering the environment before the construction of the dam (Tocantins river), in the process of confronting the new environment (artificial lake) that allows artisanal fishing in another territory, now (re) constructed by people´s collective memory. The study concludes that the way of living of these fishermen in face of the changes, which involve the transformation of a river into a lake, represents a rupture in their knowledge and in their relation with nature. Collective memory represents an essential tool for continuity, although uncertain, as it links past and present in the reconstruction of a new fishing territory.
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