The Revista Brasileira de Zootecnia (RBZ) is a publication dedicated to the broad field of Animal Science. We publish high-quality, original scientific research that spans across diverse areas within the discipline. The scope of RBZ encompasses a wide range of topics, including aquaculture, biometeorology and animal welfare, forage crops and grasslands, animal and forage plants breeding and genetics, animal reproduction, ruminant and non-ruminant nutrition, meat science and muscle biology, precision livestock, and animal production systems and agribusiness.
The Revista Brasileira de Zootecnia (RBZ) is a publication dedicated to the broad field of Animal Science. We publish high-quality, original scientific research that spans across diverse areas within the discipline. The scope of RBZ encompasses a wide range of topics, including aquaculture, biometeorology and animal welfare, forage crops and grasslands, animal and forage plants breeding and genetics, animal reproduction, ruminant and non-ruminant nutrition, meat science and muscle biology, precision livestock, and animal production systems and agribusiness.
The Revista Brasileira de Zootecnia (RBZ) is a publication dedicated to the broad field of Animal Science. We publish high-quality, original scientific research that spans across diverse areas within the discipline. The scope of RBZ encompasses a wide range of topics, including aquaculture, biometeorology and animal welfare, forage crops and grasslands, animal and forage plants breeding and genetics, animal reproduction, ruminant and non-ruminant nutrition, meat science and muscle biology, precision livestock, and animal production systems and agribusiness.
One experiment was conducted to study the utilization of animal by-products in broilers diets based on the concept of crude and ideal protein form 43 to 49 days of age. Sixty hundred Ross male broilers were used in a factorial arrangement 2×2+1 (two animal sources by-products – poultry viscera meal and bovine blood meal crude and ideal protein) and one basal diet (corn + soybean meal), envolving a total of five treatments with four replications of thirty broilers each. Weight gain, feed intake, feed conversion, carcass and breast yield and the abdominal fat percentage were evaluated. The best weight gain and feed conversion were obtained when birds were fed a corn and soybean meal based diet. The poultry viscera and bovine blood meals and formulation concepts did not influence on evaluated parameters.
Utilization of animal by-products in broilers diets based on the concept of crude and ideal protein in the period from 43 to 49 days of age
Cancherini,Luciana Cardoso and Junqueira,Otto Mack and Andreotti,Marcelo de Oliveira and Barbosa,Maria José Baptista and Oliveira,Maria Cristina de. Utilization of animal by-products in broilers diets based on the concept of crude and ideal protein in the period from 43 to 49 days of age. R. Bras. Zootec. [online]. 2004, vol.33, 6 suppl.2, [cited 2026-04-24], pp.2060-2065. Available from: <https://rbz.org.br/article/utilization-of-animal-by-products-in-broilers-diets-based-on-the-concept-of-crude-and-ideal-protein-in-the-period-from-43-to-49-days-of-age/>. ISSN 1516-3598. http://doi.org/10.1590/S1516-35982004000800018.
Cancherini,Luciana Cardoso; Junqueira,Otto Mack; Andreotti,Marcelo de Oliveira; Barbosa,Maria José Baptista; Oliveira,Maria Cristina de. Utilization of animal by-products in broilers diets based on the concept of crude and ideal protein in the period from 43 to 49 days of age. R. Bras. Zootec., v.33, 6 suppl.2, p. 2060-2065. Dec. 2004. Available from: <https://rbz.org.br/article/utilization-of-animal-by-products-in-broilers-diets-based-on-the-concept-of-crude-and-ideal-protein-in-the-period-from-43-to-49-days-of-age/>. acess on 24 Apr. 2026. http://doi.org/10.1590/S1516-35982004000800018.
Cancherini,Luciana Cardoso, & Junqueira,Otto Mack, & Andreotti,Marcelo de Oliveira, & Barbosa,Maria José Baptista, & Oliveira,Maria Cristina de. (2004). Utilization of animal by-products in broilers diets based on the concept of crude and ideal protein in the period from 43 to 49 days of age. R. Bras. Zootec., 33(6 suppl.2) , 2060-2065. http://doi.org/10.1590/S1516-35982004000800018.
CancheriniLuciana Cardoso, JunqueiraOtto Mack, AndreottiMarcelo de Oliveira, BarbosaMaria José Baptista, OliveiraMaria Cristina de. Utilization of animal by-products in broilers diets based on the concept of crude and ideal protein in the period from 43 to 49 days of age. R. Bras. Zootec. [Internet]. 2004 Dec [cited 2026 Apr 24]; 33(6 suppl.2): 2060-2065. Available from: https://rbz.org.br/article/utilization-of-animal-by-products-in-broilers-diets-based-on-the-concept-of-crude-and-ideal-protein-in-the-period-from-43-to-49-days-of-age/. http://doi.org/10.1590/S1516-35982004000800018.
Figure 6
Differential abundance for the species Faecalibacterium prausnitzii (A) and Megamonas funiformis (B).
