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.
01/Apr/2010
Daniel de Noronha Figueiredo Vieira da Cunha, José Carlos Pereira, Fabyano Fonseca e Silva, Oriel Fajardo de Campos, José Luis Braga, Janaina Azevedo Martuscello
DOI: 10.1590/S1516-35982010000400026
The objective of this study was to select models of lactation curves with a better adjustment to the observed data in models of milk production simulation systems. A data base on 6,459 recordings of daily milk production was used. These data were obtained from monthly and fortnightly controls of milk between 2004 and 2007, from 472 lactations of animals from ten different milking cow herd farms. Based on rolling averages of milk production (MP-L/day) per cow, the ten herd farms […]
Keywords: dairy cattle; modeling; non linear model
01/Oct/2005
Josineudson Augusto II de Vasconcelos Silva, Laila Talarico Dias, Lucia Galvão de Albuquerque
DOI: 10.1590/S1516-35982005000500017
The objectives of this research were to estimate heritability (h2) of heifer pregnancy and its genetic correlation (rg) with age at first calving (AFC) in a Nellore herd. Heifer pregnancy evaluated as three different definitions: pregnancy at 16 months (Pr16) – heifers calving before 31 months received 1 (success) and those calving after 30.99 months or that failed received 0 (failure); pregnancy at 24 months (Pr24) – heifers calving until 46 months of age (including Pr16) received 1 and those […]
Keywords: bayesian inference; categorical trait; heifer pregnancy; heritability; method R; non linear model