Efeito da substituição do farelo de milho (Zea mays L.) por farinha de torta de tucumã (Astrocaryum aculeatum G. Mey.) em dietas para juvenis de tambaqui (Colossoma macropomum Cuvier, 1816).

Abstract

The objective of this research was to evaluate the effect of corn bran replacement (Zea mays L.) on tucumã pulp meal (Astrocaryum aculeatum G. Mey.) In artisanal diets for tambaqui juveniles (Colossoma macropomum). The experiment was developed at the Federal Institute of Education, Science and Technology of Pará (IFPA) Campus Castanhal, with a duration of 45 52 days of cultivation. Alevins, with a mean initial weight of 7.8g ± 1.151g, were randomly distributed in 210 liters polyethylene boxes in five treatments, with three replicates each, with a completely randomized design, totaling 30 animals per treatment, 90 individuals per experimental unit. The diets were offered at a rate of 5% of the total biomass, twice a day. Biometrics were performed biweekly. Water analyzes were collected weekly, while siphoning occurred daily. At the end of the experiment, the following parameters were evaluated: animal weight gain (GP); Feed intake (CR); Apparent feed conversion (CAA); Specific growth rate (TCE); Protein efficiency rate (TEP) and Survival Rate (S). According to the increase in the percentage of replacement of maize meal (Zea mays L.) by tucumã flour (Astrocaryum aculeatum G. Mey.) In diets for tambaqui juveniles, there is a negative impairment of performance variables, presenting differences between treatments of 0% and 25% of inclusion with the other treatments.