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/Dec/2004
Jânio Coelho da Silveira, Concepta McManus, Arthur dos Santos Mascioli, Luiz Otávio Campos da Silva, Arley Coelho da Silveira, José Américo Soares Garcia, [...]
DOI: 10.1590/S1516-35982004000600010
The objective of the present work was to investigate the effects of some genetic and environmental factors on production (weaning weight WW; eighteen month weight W18) and reproduction (scrotal perimeter at 18 months SP18; calving interval CI; age at first calving AFC; True fertility TF, calving date CD) traits in a Nellore cattle herd in the Mato Grosso do Sul State, Brazil. The observations were analysed using the least squares methodology, and the statistical models included the fixed effects: year […]
Keywords: age at first calving; calving date; calving interval; scrotal perimeter; true fertility; weight
01/Mar/2002
Concepta McManus, Moacir Gabriel Saueressig, Rui Arruda Falcão, Germana Serrano, Kenia Régia Anasenko Marcelino, Giane Regina Paludo
DOI: 10.1590/S1516-35982002000300015
The objective of this work was to analyze the various factors which influence calving interval (CI), true fertility (TF), ratio of birth (RBW) and weaning weight (RWW) of the calf to the calving weight of the cow, using the crossbred herd of EMBRAPA Cerrados as a model. The data, from 4469 calvings, collected between 1976 and 1999, was analyzed using the GLM, CORR and PRINCOMP procedures of SAS. The reproductive parameters investigated include ratio of calf birth weight/calving weight of […]
Keywords: calving interval; correlations; principal components; reproductive parameters; true fertility