AVALIAÇÃO DOS ESTOQUES DA ICTIOFAUNA NA BARRAGEM DA MINA DE SOSSEGO EM CANAÃ DOS CARAJÁS (AMAZÔNIA ORIENTAL), CAPTURADOS COM USO DE TARRAFA, ANTES DO DEPÓSITO DE REJEITOS

This study aims to estimate the biomass of fish stocks in the area of the dam formed by tailings of Sossego mine in Canaa dos Carajas, captured with the use of cast nets for fish. The prospecting work was carried out during the period from 29 February to 6 March 2004, 6 months after closing the dam and immediately before the disposal of waste. The average values estimated for the capture per unit area covered by cast nets (CPUA) and biomass were 8.4 g m - ² and 16,922.7 kg, respectively. The most representative groups of fish were minnows, with 67.7% and discus with 24.8% of the total estimated biomass. The species caught were: Moenkhausia cf. sanctaefilomenae (redeye tetra fish), Tetragonopterus cf. argenteus (white tetra fish), Tetragonopterus chalceus (red tetra fish), Aequidens viridis (cichlasoma bimaculatum) Crenicichla cincta (jacunda) Hoplerythrinus unitaeniatus (jeju) Curimata inornata (branquinha) and Hoplias malabaricus (trahira). Keywords : fishing survey; yield per unit area; biomass; tailings dam.