The localities of Marapanim and Marudá, located in the micro-region of Salgado - northeast Pará - have artisanal fishing as an important economic activity. The research aims to produce an accurate diagnosis of the fishing effort through the analysis of the interaction between biotic, abiotic and anthropic factors, given the report in the press about the discussion between netters and sheep raisers. It said that the croas would be produced by the implantation of the corrals. The subproject will contribute to give more precision to the map of social use of natural resources already made by the Museu Paraense Emílio Goeldi. During seasonal field visits, leaders were interviewed and questionnaires were applied, and the data is being tabulated in a database. The location of the corrals was made with the help of a GPS. We registered the presence of several actors that practice fishing, among them, netters, corrals, crabbers, and others. For the former, the capture is more intense during the golden bream harvest. With the profit made during this period, they can invest in other economic activities, such as farming, or sustain a less important fishing effort. The others tend to practice their fishing gear all year round, as they do not have enough financial income to stop fishing or cannot afford alternative employment. A negative evolution of fish stocks has been observed in the last decades due to two factors: a) the increase in fishing effort, b) predatory fishing. The lack of enforcement by environmental agencies contributes to this practice. The deficiency of the social organization is manifested by the colony's lack of orientation of the fishermen about the management of natural resources. Besides this, the colony does not satisfactorily provide for the fishermen's rights, thus hindering their working conditions and even their living conditions. Among the fishermen themselves, many have a share of responsibility for not being up to date with the colony or for not participating much in the existing associations.
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