Utilização de resíduos de frutos e da fitase em dietas para juvenis de tambaqui, Colossoma macropomum (Cuvier, 1818) / Use of waste fruits and phytase in diets for juvenile tambaqui, Colossoma macropomum (CUVIER, 1818)

AUTOR(ES)
FONTE

IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia

DATA DE PUBLICAÇÃO

26/11/2012

RESUMO

The first objective of this research evaluated the apparent digestibility of a test diet (without fruits residues) and other two, the first with an inclusion of 20% of passion fruit seeds and the other with an inclusion of 20% of peel and seeds from tucumã for tambaqui juveniles (Colossoma macropomum). The total apparent digestibility, ether extract, protein and nonnitrogen extract were: 64, 62, 66, 62 and 55, 57, 54 and 58 % for passion fruit and tucumã respectively. Therefore, there was a reduction of 17% in digestibility from the diet with passion fruit seeds and 28.6% with peel and seeds from tucumã. In the second phase, this research evaluated the performance and body composition in tambaqui juveniles, submitted with three treatments with isoproteic (30%) and isocaloric diets (400 Kcal/100 g): one standard without fruits waste addition, one with 20% from passion fruits seeds (Passiflora edulis) and other with 20% of bark and seeds from tucumã, Astrocaryum acuelatum. The results demonstrated that the use of these fruits with different levels in the diets decreased the performance and body composition in tambaqui juveniles. The third phase was to compare the effect of phytase on performance and reduction of phosphorus excretion from tambaqui in the water. Four isoproteic (30%) and isocaloric (400 Kcal/100 g) diets were used: one standard (control) without phytase supplementation, and other three with different phytase levels (1000, 1500 and 2000 uF/kg). The results demonstrated that the use of phytase in diets for fish growth did not interfere in fish performance, but can reduce fish phosphorus excretion by 21%, minimizing the impacts caused by this nutrient.

ASSUNTO(S)

tambaqui maracujá tucumã fitase recursos pesqueiros e engenharia de pesca

ACESSO AO ARTIGO

Documentos Relacionados