Níveis periféricos de testosterona total em touros Guzerá

Juliano Cesar Dias; Venício José de Andrade; Lucas Luz Emerick; Jorge André Matias Martins; Vicente Ribeiro do Vale Filho

doi:10.5216/cab.v15i1.5073

PERIPHERAL LEVELS OF TOTAL TESTOSTERONE IN GUZERAT BULLS

Authors

Juliano Cesar Dias Universidade Federal da Fronteira Sul (UFFS), Laranjeiras do Sul, Paraná, Brasil
Venício José de Andrade Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Minas Gerais, Brasil
Lucas Luz Emerick Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Minas Gerais, Brasil
Jorge André Matias Martins Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Minas Gerais, Brasil
Vicente Ribeiro do Vale Filho Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Minas Gerais, Brasil

DOI:

https://doi.org/10.5216/cab.v15i1.5073

Keywords:

Animal Reproduction

Abstract

Twenty-four Guzerat bulls were evaluated from 24 to 34 months of age, aiming to determinate the bulls serum testosterone concentration profile and their variation according to age, body weight and andrologic traits. The average of testosterone concentration was 1.36 ng/mL, with effect of time at harvest on circulating levels. The regression equation of testosterone according to body weight showed linear effect, suggesting that for each kilogram added to the body weight, an increase of 0.0082 ng/mL on serum testosterone concentrations occurs; and the regression of testosterone according to scrotal circumference (SC) also showed a linear effect. The results show that for each centimeter added to SC in Guzerat bulls, an increase of 0.2319 ng/mL on testosterone concentrations occurs. The regression of sperm concentration according to serum testosterone showed a linear effect, the results show that for each 0.1 ng/mL added to serum testosterone concentration, an increase of 9.29x10⁶ spermatozoa/mL of semen occurs. The results indicate that circulating levels of testosterone may help on identification and selection of Guzerat bulls with major reproductive potential.

KEYWORDS: andrology; Guzerat; semen; testosterone; zebu.

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Author Biographies

Juliano Cesar Dias, Universidade Federal da Fronteira Sul (UFFS), Laranjeiras do Sul, Paraná, Brasil

Venício José de Andrade, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Minas Gerais, Brasil

Lucas Luz Emerick, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Minas Gerais, Brasil

Jorge André Matias Martins, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Minas Gerais, Brasil

Vicente Ribeiro do Vale Filho, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Minas Gerais, Brasil

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Published

2014-03-28

How to Cite

DIAS, J. C.; ANDRADE, V. J. de; EMERICK, L. L.; MARTINS, J. A. M.; FILHO, V. R. do V. PERIPHERAL LEVELS OF TOTAL TESTOSTERONE IN GUZERAT BULLS. Brazilian Animal Science/ Ciência Animal Brasileira, Goiânia, v. 15, n. 1, p. 64–73, 2014. DOI: 10.5216/cab.v15i1.5073. Disponível em: https://revistas.ufg.br/vet/article/view/5073. Acesso em: 16 mar. 2025.

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Issue

Vol. 15 No. 1 (2014)

Section

Veterinary Medicine

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