Avaliação do valor nutricional de subprodutos de origem animal para o camarão marinho Litopenaeus vannamei (Boone, 1931)

• Autor(a) principal: Ribeiro, João Pedro dos Santos
• Data de Publicação: 2016
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da UFRN
• Texto Completo: https://repositorio.ufrn.br/handle/123456789/33918
• topic: Camarão marinho; Marine shrimp; Litopenaeus vannamei; Litopenaeus vannamei; Digestibilidade; Digestibility; Aquicultura

Studies about the digestibility of marine shrimp Litopenaeus vannamei to understand the nutritional requirement of this animal are critical to the sustainable growth of the farmed shrimp industry through the formulation of more efficient diets to reduce to the amount of nutrients that can be discarded in the environment and increase growth rates, productivity and the profitability to promote social equity. This study aimed to evaluate the apparent digestibility of dry matter (ADMD), crude protein (ACPD) and gross energy (AED) of six animal byproducts derived from cattle and poultry which are employed as protein sources in commercial diets. The ingredients were: red blood cells meal (RBC), blood meal (BM), poultry by-product meal (low grade) (PBM-L), poultry by-product meal (high grade) (PBM-H), hydrolyzed feather meal (low grade) (HFM-L), hydrolyzed feather meal (high grade) (HFM-H). The digestibility of the six protein sources was evaluated through the in vivo method where the ingredients are included in a reference diet, in this study, at two levels (10% and 30%). The indigestible marker, chromic oxide (Cr2O3) was included in all diets at 0.5%. The trials were performed in digestibility tanks equipped with settling columns and feces were collected hourly, lyophilized and stored frozen. Diets that showed the smallest ADMD, ACPD and AED coefficients were BM at 30% followed by HFM-L also at 30% in contrast to diets HFM-H included at 30% followed by RBC included at 10%. For ingredients, those which displayed the lowest digestibility values were HFM-L and PBM-H, in contrast to RBC and PBM-L which registered the highest coefficients among all ingredients. ACPD showed a weak correlation to growth rate and productivity. The digestibility values found in this study are within the ranges reported in the literature but reflect the nutritive value of ingredients available in the Brazilian market which should be taken into account for the formulation of efficient diets applied to our conditions.