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.
The objectives of this study were to validate a non-extractive RIA for seminal testosterone and quantify the hormone using a solid-phase commercial kit, and study the correlation between testosterone in seminal plasma and sperm characteristics. Parallelism showed a correlation index r = 0.992 (Y = -5.47 + 1.073X; R2 = 0.985), indicating that the non-extractive method presented is indicated particularly for assessment of testosterone when establishing comparisons between samples. Overall mean (±SD) of testosterone level was 0.60±0.65 ng/mL. Correlation was only found between the seminal concentrations of testosterone and pH of the semen.
Correlation between sperm characteristics and testosterone in bovine seminal plasma by direct radioimmunoassay
Souza,Luiz Waldemar de Oliveira and Andrade,André Furugen Cesar and Celeghini,Eneiva Carla Carvalho and Negrão,João Alberto and Arruda,Rubens Paes de. Correlation between sperm characteristics and testosterone in bovine seminal plasma by direct radioimmunoassay. R. Bras. Zootec. [online]. 2011, vol.40, 12, [cited 2026-04-23], pp.2721-2724. Available from: <https://rbz.org.br/article/correlation-between-sperm-characteristics-and-testosterone-in-bovine-seminal-plasma-by-direct-radioimmunoassay/>. ISSN 1516-3598. https://doi.org/10.1590/S1516-35982011001200015.
Souza,Luiz Waldemar de Oliveira; Andrade,André Furugen Cesar; Celeghini,Eneiva Carla Carvalho; Negrão,João Alberto; Arruda,Rubens Paes de. Correlation between sperm characteristics and testosterone in bovine seminal plasma by direct radioimmunoassay. R. Bras. Zootec., v.40, 12, p. 2721-2724. Dec. 2011. Available from: <https://rbz.org.br/article/correlation-between-sperm-characteristics-and-testosterone-in-bovine-seminal-plasma-by-direct-radioimmunoassay/>. acess on 23 Apr. 2026. https://doi.org/10.1590/S1516-35982011001200015.
Souza,Luiz Waldemar de Oliveira, & Andrade,André Furugen Cesar, & Celeghini,Eneiva Carla Carvalho, & Negrão,João Alberto, & Arruda,Rubens Paes de. (2011). Correlation between sperm characteristics and testosterone in bovine seminal plasma by direct radioimmunoassay. R. Bras. Zootec., 40(12) , 2721-2724. https://doi.org/10.1590/S1516-35982011001200015.
SouzaLuiz Waldemar de Oliveira, AndradeAndré Furugen Cesar, CeleghiniEneiva Carla Carvalho, NegrãoJoão Alberto, ArrudaRubens Paes de. Correlation between sperm characteristics and testosterone in bovine seminal plasma by direct radioimmunoassay. R. Bras. Zootec. [Internet]. 2011 Dec [cited 2026 Apr 23]; 40(12): 2721-2724. Available from: https://rbz.org.br/article/correlation-between-sperm-characteristics-and-testosterone-in-bovine-seminal-plasma-by-direct-radioimmunoassay/. https://doi.org/10.1590/S1516-35982011001200015.
Figure 6
Differential abundance for the species Faecalibacterium prausnitzii (A) and Megamonas funiformis (B).
