Use of Graph Model for the Resolution of Conflicts between Fishers of the Amazonian Floodplain Lakes

Abstract

We evaluated the GMCR II (Model of the Graphs for Conflict Resolution) as a tool for the identification of fishing management strategies that could be possible solutions for fishing conflicts in the floodplain lakes of the Central Amazon. The procedures of this software are based on the Graph Theory, a mathematical approach derived from the Game Theory. In our modeling, the players were IBAMA (environmental agency in Brazil), commercial fishers and subsistence fishers. The GMCR II demonstrated that when IBAMA adopts the strategy of restriction of some fishing gear in floodplain lakes, the resolution of the conflict between fishers is more likely to happen. We also conclude that the use of a mathematical approach, by the employment of the GMCR II, would be an important tool for approaching conflict situations but that its use needs to be followed by other methodologies, mainly participative programs.