Crescimento da curimatã comum em um sistema de recirculação de água

Abstract

The work was developed with common Curimatã fingerlings in a Recirculating Aquaculture System (RAS) whose flow occurs from the culture tank, through a series of treatments, and returning to the same tank. The excrements, feed rest, urine and faeces, were sent to the aqueous medium and subjected to a mechanical-biological filtration process to remove suspended material and promote the digestion of contaminants by anaerobic bacteria. A total of n180 common Curimatã (Prochilodus cearaensis) fingerlings of different initial sizes, but same age: 40 large, 100 medium (two groups: 50 + 50) and 40 small ones were fed three times daily with commercial ration (Free Ribe 40% PB, for fish), plus Spirulina. There was a compensatory growth of the small ones, that reached the big, and surpassing the average ones in the final size.