Treatments consisted of a tilapia monoculture with 2 tilapias.m-2; and polyculture with 2 tilapias.m-2 and L. vannamei at four different densities (3, 6, 9 and 12 shrimps.m-2).The initial individual biomass for fish and shrimp were 1.23±0.12 g and 0.133±0.009 g, respectively.