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.
It was evaluated the bioeconomic impact of the breeding soundness evaluation on beef cattle production in southern Brazil. Two similar production systems, with and without the use of breeding soundness evaluation, were compared during 4 years in the municipality of Júlio e Castilhos. The rate of unsound bulls in the first examination was 22.8%. By performing the examination, calf production increased by 31%, 13.8 calves/bull/year and 24 kg of calves/cow/year. The benefit/cost ratio on the investment with the breeding soundness evaluation was R$ 35.84. The breeding soundness evaluation improves bioeconomic aspects of beef cow-calf systems.
Bioeconomic impact of bull breeding soundness examination in cow-calf systems
Menegassi,Sílvio Renato Oliveira and Barcellos,Júlio Otávio Jardim and Lampert,Vinícius do Nascimento and Borges,João Batista Souza and Peripolli,Vanessa. Bioeconomic impact of bull breeding soundness examination in cow-calf systems. R. Bras. Zootec. [online]. 2011, vol.40, 2, [cited 2026-04-24], pp.441-447. Available from: <https://rbz.org.br/article/bioeconomic-impact-of-bull-breeding-soundness-examination-in-cow-calf-systems/>. ISSN 1516-3598. https://doi.org/10.1590/S1516-35982011000200028.
Menegassi,Sílvio Renato Oliveira; Barcellos,Júlio Otávio Jardim; Lampert,Vinícius do Nascimento; Borges,João Batista Souza; Peripolli,Vanessa. Bioeconomic impact of bull breeding soundness examination in cow-calf systems. R. Bras. Zootec., v.40, 2, p. 441-447. Feb. 2011. Available from: <https://rbz.org.br/article/bioeconomic-impact-of-bull-breeding-soundness-examination-in-cow-calf-systems/>. acess on 24 Apr. 2026. https://doi.org/10.1590/S1516-35982011000200028.
Menegassi,Sílvio Renato Oliveira, & Barcellos,Júlio Otávio Jardim, & Lampert,Vinícius do Nascimento, & Borges,João Batista Souza, & Peripolli,Vanessa. (2011). Bioeconomic impact of bull breeding soundness examination in cow-calf systems. R. Bras. Zootec., 40(2) , 441-447. https://doi.org/10.1590/S1516-35982011000200028.
MenegassiSílvio Renato Oliveira, BarcellosJúlio Otávio Jardim, LampertVinícius do Nascimento, BorgesJoão Batista Souza, PeripolliVanessa. Bioeconomic impact of bull breeding soundness examination in cow-calf systems. R. Bras. Zootec. [Internet]. 2011 Feb [cited 2026 Apr 24]; 40(2): 441-447. Available from: https://rbz.org.br/article/bioeconomic-impact-of-bull-breeding-soundness-examination-in-cow-calf-systems/. https://doi.org/10.1590/S1516-35982011000200028.
Figure 6
Differential abundance for the species Faecalibacterium prausnitzii (A) and Megamonas funiformis (B).
