Heavy metal bioaccumulation of the characiform Brycon falcatus Muller Troschel, 1844 in the Teles Pires basin, Southern Amazon/ Bioacumulacao de metais pesados no characiforme Brycon falcatus Muller Troschel, 1844 na bacia do rio Teles Pires, Amazonia Meridional

• Published in: Acta scientiarum. Biological sciences Vol. 38; no. 2; p. 131
• Main Authors: de Matos, Liliane Stedile, Silva, Daniela Rocha da, Silva, Joao Otavio dos Santos, de Andrade, Ricardo Lopes Tortorela, Carvalho, Lucelia Nobre
• Format: Journal Article
• Language: Spanish
• Published: Universidade Estadual de Maringa 01.04.2016
• Subjects: Estados Unidos
• ISSN: 1679-9283; 1807-863X
• DOI: 10.4025/actascibiolsci.v38i2.30656

The Teles Pires River basin is located in an area of the Southern Amazon where discharge of tannery effluents and intense agricultural activity occurs. These activities increase the risk of contamination by runoff and leaching of pesticides and heavy metals. This study presents the concentration and bioaccumulation of heavy metals copper (Cu) and total chromium (Cr) in matrinxa (Bryconfalcatus), a species of fish highly consumed in the region. Liver and muscle tissue was analyzed from 41 samples of B. falcatus collected during the dry season in 2013 from the Teles Pires River basin. Considering that bioaccumulation is the progressive increase in the amount of a substance in an organism or part of an organism, copper bioaccumulation in liver samples from B. falcatus was verified. Cr and Cu concentrations were higher in the liver than in the muscle tissue of fish collected in all rivers. The highest concentrations of Cr in the liver were observed in fish collected from the Teles Pires River (1.87 [micro]gx[g.sup.-1]) and the Celeste River (1.06 [micro]gx[g.sup.-1]). The highest concentrations of Cu in the liver were observed in fish collected from the Cristalino River (44.20 [micro]gx[g.sup.-1]) and the Teles Pires River (34.77 [micro]gx[g.sup.-1]). The high concentration of Cu in the livers of fish collected from the Teles Pires river basin reflects the economic activities of mining and agriculture in the surrounding areas of this basin. Keywords: agriculture, Cr, Cu, matrinxa, mining, Tapajos River Basin. Na Amazonia Meridional a bacia do rio Teles Pires esta numa area onde existe despejo de efluentes de curtumes e intensa atividade agricola, aumentando o risco de lixiviacao e escoamento de defensivos agricolas e metais pesados. Este estudo apresenta a concentracao e bioacumulacao de metais pesados, cobre (Cu) e cromo (Cr) total no matrinxa, Brycon falcatus, uma especie de peixe muito consumida regionalmente. Analisamos o figado e tecido muscular de 41 exemplares de B. falcatus coletados durante a estacao seca de 2013 na bacia do rio Teles Pires. Considerando que bioacumulacao e o aumento progressivo na quantidade de uma substancia em um organismo ou parte deste, verificamos bioacumulacao de cobre nas amostras de figado de B. falcatus. As concentracoes de Cr e Cu foram maiores no figados do que no musculo dos peixes nos rios coletados. As maiores concentracoes de Cr no figado foram observadas nos peixes coletados no rio Teles Pires (1,87 [micro]gx[g.sup.-1]) e no rio Celeste (1,06 [micro]gx[g.sup.-1]). As maiores concentracoes de Cu no figado foram observadas nos peixes coletados no rio Cristalino (44,20 [micro]gx[g.sup.-1]) e no rio Teles Pires (34,77 [micro]gx[g.sup.-1]). As altas concentracoes de Cu no figado dos peixes coletados na bacia do rio Teles Pires refletem as atividades economicas do garimpo e agricultura no entorno desta bacia. Palavras-chave: agricultura, Cr, Cu, matrinxa, garimpo, bacia do rio Tapajos.