1. Aquatic Ecology Group; Federal University of Pará; Avenida Perimetral 2651, Terra Firme 66040170 Belém PA Brazil
2. Evandro Chagas Institute; Environment Section; Rodovia BR-316, km 7, S/N, Levilândia 67030000 Ananindeua PA Brazil
3. Tractebel Engineering-LEME Engineering; Avenida dos Andradas 3000, Santa Efigênia 30260070 Belo Horizonte MG Brazil