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/Oct/2000
Francisco Aloísio Cavalcante, Raimundo Martins Filho, Claudio Cabral Campello, Raimundo Nonato Braga Lobo, Gabrimar Araujo Martins
DOI: 10.1590/S1516-35982000000500010
A study was conducted to evaluate calving interval (CI) in the Nellore breed, using a total of 578 data of calving interval from animals raised in pasture, from 1988 to 1996. The GLM procedure of the SAS Program was used to analyze the data. The model included the sire of the cow random effect, the fixed effects of genetic group of last calf, of the year and the month of the last calving and the interactions between last genetic group […]
Keywords: bovines; calving interval; Nellore; reproduction
01/May/1999
Claudio Cabral Campello, Raimundo Martins Filho, Raimundo Nonato Braga Lobo
DOI: 10.1590/S1516-35981999000300006
The effects of genetic and environmental factors on reproductive traits, from 475 records of calving interval (CI) and 401 of real fertility (RF) of Nellore cows reared at Santa Inês county, Maranhão State, in pasture grazing system with supplementation in the dry season, from 1980 to 1994, were studied. The data were analyzed by means of linear models, which included the sire effect (random effects), month and year of the last and the actual calving, calving number and sex of […]
Keywords: bovine; calving interval; heritability; Nellore breed; real fertility; reproduction