Custo de produção de rações alternativas para peixes onívoros no estado do Pará, Amazônia, Brasil

This study aimed to evaluate the producing cost of alternative feed for omnivorous fish. The information about ingredients and prices obtained monthly from December/2014 to November/2015 in Belem, Santa Izabel do Para, Castanhal, Santa Maria do Para and Braganca. Subsequently, rations formulated and costs calculated using the operating cost structure. The processing considered four stages, from "mixing" to "cooling", and everything followed a hypothetical demand for fish farming in a pond with 0.2 hectare of water area. It founded that most of the ingredients were available throughout the production cycle and others showed seasonality. The formulated diets had 28 to 45% crude protein and cost from R$ 1.88/kg to R$ 2.38/kg, respectively. There was a low production cost, suggesting a lower market price compared to the prices practiced for industrialized feed in the region.