BREEDING SOUNDNESS EVALUATION OF TWO AND THREE YEAR OLD NELORE (BOS TAURUS INDICUS) BULLS, RAISED UNDER PASTURE CONDITION

Authors

  • Juliano Cesar Dias
  • Venício José Andrade
  • Jorge André Matias Martins
  • Lucas Luz Emerick
  • Paulo Eduardo Machado Gonçalves
  • Vicente Ribeiro Vale Filho

DOI:

https://doi.org/10.5216/cab.v10i4.3950

Keywords:

Animal reproduction

Abstract

Data from 583 Nelore bulls, aging from two and three years old, raised under pasture condition, were used to study andrologic traits (physical aspects: motility and vigor; and morphologic: major and total defects of the semen) and testicular measurements (scrotal circumference - SC and testicular volume - TVOL) to establish a profile of andrologic classification for fertility (BSE). The animals were divided in two groups: young bulls (N = 345), with ages from 18 to 30 months (2 years old), and adult (N = 238), with ages from 31 to 42 months (3 years old). Differences were observed (p < 0.05) for body weight, SC, physical and morphologic characteristics of the semen and TVOL in the two year olds with BSE above and below 60 points. In the three years old bulls differences were observed (p < 0.05) for SC and physical and morphologic characteristics of the semen in bulls with BSE above and below 60 points. The results suggested that body weight and SC affected the reproductive condition of young Nelore bulls. SC and seminal traits were the determining factors in the selection for a better reproductive condition, showing the importance of semen analysis when evaluating bulls raised under pasture conditions.
KEY WORDS: Andrology, breeding soundness evaluation, scrotal circumference, semen, zebu. 

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Author Biographies

Juliano Cesar Dias

Aluno de Doutorado, Escola de Veterinária da Universidade Federal de Minas Gerais. Bolsista do CNPq.  Avenida Antônio Carlos, no 6627, Caixa Postal 567, CEP 30123-970, Belo Horizonte, MG.

Venício José Andrade

Professor Titular do Departamento de Zootecnia, PhD, EV - UFMG.

Jorge André Matias Martins

Aluno de Doutorado, EV - UFMG.

Lucas Luz Emerick

Aluno de Doutorado, EV – UFMG. Bolsista do CNPq.

Paulo Eduardo Machado Gonçalves

Aluno de Mestrado, EV – UFMG.

Vicente Ribeiro Vale Filho

Professor Titular do Departamento de Clínica e Cirurgia Veterinárias, PhD, EV – UFMG.

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Published

2009-12-17

How to Cite

DIAS, J. C.; ANDRADE, V. J.; MARTINS, J. A. M.; EMERICK, L. L.; GONÇALVES, P. E. M.; VALE FILHO, V. R. BREEDING SOUNDNESS EVALUATION OF TWO AND THREE YEAR OLD NELORE (BOS TAURUS INDICUS) BULLS, RAISED UNDER PASTURE CONDITION. Brazilian Animal Science/ Ciência Animal Brasileira, Goiânia, v. 10, n. 4, p. 1094–1099, 2009. DOI: 10.5216/cab.v10i4.3950. Disponível em: https://revistas.ufg.br/vet/article/view/3950. Acesso em: 17 jul. 2024.

Issue

Vol. 10 No. 4 (2009)

Section

Animal Production

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