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
Pedro Renan de Barros Bueno, Paulo Roberto Nogara Rorato, João Walter Dürr, Ernesto Enio Budke Krug
DOI: 10.1590/S1516-35982004000900011
In order to study the influence of the economic factor on the objectives used to select the animals, production data of a payment program by milk quality implanted by a milk industry of Rio Grande do Sul were used. The criteria of quality of the referred program consisted of minimum contents of 3.1% of fat, 2.85% of protein and a maximum 500,000 units of somatic cells. The data were stratified in three levels, in agreement with the volume of milk […]
Keywords: milk quality; production cost; profit function; selection objective
01/Apr/2003
Gabrimar Araújo Martins, Fernando Enrique Madalena, José Henrique Bruschi, José Ladeira da Costa, João Bosco Neves Monteiro
DOI: 10.1590/S1516-35982003000200008
The economic values of dairy cattle were derived from economics and production data of a demonstration farm, the “Pasture Dairy Production System using Holstein Zebu Cattle” at Embrapa-Dairy Cattle. The economic values were estimated by two methods 1) from the partial derivative of profit with respect to each trait, and 2) from the partial derivative of the income/cost ratio, both evaluated at the mean value of all other traits. With the latter method, the economic values of traits considered, expressed […]
Keywords: dairy cattle; economic value; profit function; selection