Utilização de levedura íntegra de cana de açúcar (Saccharomyces cerevisiae) e seus subprodutos na alimentação de juvenis de pintado (Pseudoplatystoma coruscans) / Utilization of sugar cane yeast (Saccharomyces cerevisiae) and its by-products in feeding juvenil of pintado (Pseudoplatystoma coruscans)

AUTOR(ES)
DATA DE PUBLICAÇÃO

2005

RESUMO

The goal of this study is to appraise the inclusion of two levels (2,5 and 5%) of dried yeast (Saccharomyces cerevisiae) and its by-products, yeast cell wall (MOS) and disrupted yeast cells, in diets for juveniles of pintado (Pseudoplatystoma coruscans), based on its productive pattern performance, body composition, hepatosomatic and viscera somatic and digestibility index that appears on the test ingredients. It was used 336 of juvenile of pintado, already trained to eat dried portion, with medium average weight of 17 g distributed in a totally randomized 3 x 2 + 1 factorial design, corresponding to three test ingredients, used in two different percentages supplied in testimony treatment (without yeasts or by-products), Using cages with capacity of 60 lt., with 12 fishes per unit. It was developed 7 isonitrogenous diets (45% CP) and isoenergetic diets (4200 kcal EB/kg), containing dried yeast, disrupted yeast cells and yeast cell wall (2,5% e 5,0%). The diet was supplied during 64 days, 2 times per day and ad libitum. The physical-chemical analysis patterns of water as dissolved oxygen, temperature and pH was daily monitored. The performance patterns appraised were based on specific growing rate, apparent feed conversion, survival and consumption of portion. The analysis of body composition index of viscera somatic, hepatosomatic were realized after the experimental period. The digestibility trial was conducted to determine the apparent digestibility coefficients (ADC) for test ingredients, using diets with chromic oxide as inert marker. The yeast and its by-products had effect over carcass composition, Specific growth rate (SGR%), Survival (S%) and Feed Intake (g), protein plasmatic levels and uric acid. The treatment without yeast presented the lower tax of survival, being able to indicates that the yeast and its by-products can improve the pintados immune system. The ADC obtained to yeast protein, yeast cell wall and disrupted yeast cells were 71,54%, 77,45% and 28,48%. In summary, the yeast and its by-products can be used in the pintados nutrition until 5% as feed additive, promoting better performance and survival, without damage the animals metabolism.

ASSUNTO(S)

saccharomyces cerevisiae desempenho produtivo digestibility derivados de levedura saccharomyces cerevisiae productive performance pseudoplatystoma coruscans pseudoplatystoma coruscans digestibilidade yeast by-products

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