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.
A serie of experiments was carried out with the objective to determine the nutritive value of nine poultry by-product meal and six feather meal for chickens. Four different methodologies were used to determine the values of N corrected apparent (AMEn) and true corrected (TMEn) metabolizable energy, where the traditional method was used with chicks and cocks and the Sibbald method was used with roosters and cecectomized cocks. The estimated AMEn and TMEn values of viscera meal ranged from 3,051 to 3,621 and from 2,866 to 3,583 kcal/kg, respectively. Feathers meal values ranged from 2,952 to 3,629 and from 2,703 to 3,671 kcal/kg for AMEn and TMEn, recpectively. Among the methodologies to determine the feeds energy, the correlations were low, so the differences on the feeds energy values were due to the methodology used.
Chemical Composition and Metabolizable Energy Values of Feathers Meal and Poultry By-Product Meal Determined by Different Methodologies for Chickens
Nascimento,Adriana Helena do and Gomes,Paulo Cezar and Albino,Luiz Fernando Teixeira and Rostagno,Horacio Santiago and Torres,Robledo de Almeida. Chemical Composition and Metabolizable Energy Values of Feathers Meal and Poultry By-Product Meal Determined by Different Methodologies for Chickens. R. Bras. Zootec. [online]. 2002, vol.31, 3 suppl., [cited 2026-04-24], pp.1409-1417. Available from: <https://rbz.org.br/article/chemical-composition-and-metabolizable-energy-values-of-feathers-meal-and-poultry-by-product-meal-determined-by-different-methodologies-for-chickens/>. ISSN 1516-3598. http://doi.org/10.1590/S1516-35982002000600012.
Nascimento,Adriana Helena do; Gomes,Paulo Cezar; Albino,Luiz Fernando Teixeira; Rostagno,Horacio Santiago; Torres,Robledo de Almeida. Chemical Composition and Metabolizable Energy Values of Feathers Meal and Poultry By-Product Meal Determined by Different Methodologies for Chickens. R. Bras. Zootec., v.31, 3 suppl., p. 1409-1417. Jun. 2002. Available from: <https://rbz.org.br/article/chemical-composition-and-metabolizable-energy-values-of-feathers-meal-and-poultry-by-product-meal-determined-by-different-methodologies-for-chickens/>. acess on 24 Apr. 2026. http://doi.org/10.1590/S1516-35982002000600012.
Nascimento,Adriana Helena do, & Gomes,Paulo Cezar, & Albino,Luiz Fernando Teixeira, & Rostagno,Horacio Santiago, & Torres,Robledo de Almeida. (2002). Chemical Composition and Metabolizable Energy Values of Feathers Meal and Poultry By-Product Meal Determined by Different Methodologies for Chickens. R. Bras. Zootec., 31(3 suppl.) , 1409-1417. http://doi.org/10.1590/S1516-35982002000600012.
NascimentoAdriana Helena do, GomesPaulo Cezar, AlbinoLuiz Fernando Teixeira, RostagnoHoracio Santiago, TorresRobledo de Almeida. Chemical Composition and Metabolizable Energy Values of Feathers Meal and Poultry By-Product Meal Determined by Different Methodologies for Chickens. R. Bras. Zootec. [Internet]. 2002 Jun [cited 2026 Apr 24]; 31(3 suppl.): 1409-1417. Available from: https://rbz.org.br/article/chemical-composition-and-metabolizable-energy-values-of-feathers-meal-and-poultry-by-product-meal-determined-by-different-methodologies-for-chickens/. http://doi.org/10.1590/S1516-35982002000600012.
Figure 6
Differential abundance for the species Faecalibacterium prausnitzii (A) and Megamonas funiformis (B).
