Influência sazonal sobre o perfil seminal e congelabilidade do sêmen de touros pantaneiros

Nathalia Hack Moreira; Eleonora Araújo Barbosa; Normandes Vieira Nascimento; Raquel Soares Juliano; Urbano Gomes Pinto de Abreu; Alexandre Floriani Ramos

doi:10.1590/1089-6891v17i123651

SEASONAL INFLUENCE ON SEMINAL PATTERN AND FREEZABILITY OF PANTANEIRO BULL SEMEN

Authors

Nathalia Hack Moreira Universidade de Brasília (UnB), Brasília, Distrito Federal, Brasil
Eleonora Araújo Barbosa Universidade de Brasília (UnB), Brasília, Distrito Federal, Brasil
Normandes Vieira Nascimento Embrapa Recursos Genéticos e Biotecnologia, Distrito Federal, Brasília, Brasil
Raquel Soares Juliano Embrapa Pantanal, Corumbá, Mato Grosso do Sul, Brasil
Urbano Gomes Pinto de Abreu Embrapa Pantanal, Corumbá, Mato Grosso do Sul, Brasil
Alexandre Floriani Ramos Embrapa Recursos Genéticos e Biotecnologia, Distrito Federal, Brasília, Brasil

DOI:

https://doi.org/10.1590/1089-6891v17i123651

Keywords:

Animal Reproduction

Abstract

The purpose of this paper was to investigate the effect of the season of the year on testicular morphology, fresh and frozen/thawed semen quality from Pantaneiro bulls bred in Brasilia, DF. Six bulls were submitted, once a month for one year, to evaluation of testicular measurements, semen collection using an artificial vagina and cryopreserved with medium containing Tris-based, egg yolk and glycerol. The testicular length and volume were greater (P < 0.05) in June (11.1±0.8 cm; 652.7±138.0 cm3), July (11.0±0.9 cm; 616.4±156.2 cm3), and September (11.8±0.8 cm; 692.4±141.3 cm3) than October (9.4±1.2 cm; 498.5±154.3 cm3) and November (10.3±1.1 cm; 560.0±111.8 cm3). The sperm concentration was greater (P<0.05) in August (1265.0±436.8 x106sperm/mL) than October, December and January (591.6±192.0, 627.5±314.4; 502.5±172.9 x106/mL). There was no effect of season on the quality of fresh and frozen semen (motility, vigor, total defects and acrosome integrity) (P > 0.05). In conclusion, Pantaneiro bulls, bred in the Midwest region of Brazil, can be used in natural mating programs in all seasons. Aiming to improve the Brazilian Animal Germplasm Bank with a higher number of samples collected, we suggest that the freezing of the semen is done between June and August, although there will be no losses of semen quality at any time.

Keywords: bovine; conservation; cryopreservation; reproduction; seasonality.

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Published

2016-01-30

How to Cite

MOREIRA, N. H.; BARBOSA, E. A.; NASCIMENTO, N. V.; JULIANO, R. S.; ABREU, U. G. P. de; RAMOS, A. F. SEASONAL INFLUENCE ON SEMINAL PATTERN AND FREEZABILITY OF PANTANEIRO BULL SEMEN. Brazilian Animal Science/ Ciência Animal Brasileira, Goiânia, v. 17, n. 1, p. 60–69, 2016. DOI: 10.1590/1089-6891v17i123651. Disponível em: https://revistas.ufg.br/vet/article/view/23651. Acesso em: 11 mar. 2025.

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Issue

Vol. 17 No. 1 (2016)

Section

Animal Production

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