Reproductive characteristics of pre-pubertal bulls supplemented with vitamin A
DOI:
https://doi.org/10.33448/rsd-v9i6.3354Keywords:
Sperm cells; Fertility; Vitamins; Cattle.Abstract
Fertility is the most important factor in determining profitability of beef herd. Deficiency of vitamins and other essential nutrients can impact bull reproduction components. The aim of this study was to evaluate the reproductive characteristics of pre-pubertal bulls supplemented with vitamin A. Forty Nellore bulls aged between 18 and 20 months were used. They were allocated into two groups: treated, which received vitamin A (2 ml/animal); and control, which were not supplemented. The animals went through andrological examination. Orchiectomy was performed for histopathological evaluation of the testis. Mean motility and sperm vigor were higher in the animals present in the treated group (p <0,01). No differences were found between the groups in the other andrological parameters evaluated. The structures analyzed in the histopathological examination presented normal appearance. The data suggest that Vitamin A supplementation can have positive results on sperm quality of pre-puberty bulls.
References
Amann, RP & Schambacher, BD. (1983). Physiology of male reproduction. J. Anim. Sci., 57, suppl.:380-403.
Barbosa, RT, Machado, R & Bergamaschi, MMCM. M. (2005). A importância do exame andrológico em bovinos. São Carlos, Circular Técnica 41, Embrapa Pecuária Sudeste, 2005.
Behmer, OA, Tolosa, EM & Freitas Neto AG. Manual de técnicas para histologia normal e patológica. São Paulo: EDART- Universidade de São Paulo, 1976. 257p.
CBRA, Colégio Brasileiro de Reprodução Animal. Manual para exame andrológico e avaliação do sêmen animal. 2.ed. Belo Horizonte: Colégio Brasileiro de Reprodução Animal, 1998. 49p.
Foster, RA & Ladds, PW. (2007). Male genital system. In: MAXIE, M. G. Jubb, Kenndey and Palmer´s. Pathology of domestic animals. 5th ed. Philadelphia: Elsevier, 3:565-619.
Filappi A. Prestes, D, Rocha, R, Schosller, DR, Bondan, C, Bragança, JF & Cecim, M. (2008). Qualidade seminal e histomorfometria dos órgãos reprodutivos de ovinos tratados com fluoreto de sódio. Ciência Rural, 38(9):2561-2566.
Hurley, WL, Doane, RM. Recent Developments in the Roles of Vitamins and Minerals in Reproduction. Journal of Dairy Science, 72(3):784-8043, 1989.
Kozick, LE, Barnabe RC, CasaGrande, JF, Almeida, CA. Efeitos da superdosagem de vitaminas A, D, E e C sobre o quadro espermático de touros. Rev. Fac. Med. Vet. Zootec. Univ. S. Paulo. 15 (2):171-80, 1978.
Luna, LG. Manual of histologic staining methods of the Armed Forces Institute of Pathology. 3.ed. New York: McGraw-Hill, 1968, 258p.
Pereira, AS, Shitsuka, DM, Parreira, FJ, Shitsuka, R. (2018). Metodologia da pesquisa científica. Santa Maria. Editora Projeto Universidade Aberta do Brasil / Núcleo de Tecnologia Educacional / Universidade Federal de Santa Maria. Disponível em: https://repositorio.ufsm.br/bitstream/handle/1/15824/Lic_Computacao_Metodologia-Pesquisa-Cientifica.pdf?sequence=1. Acesso em: 02 Abril 2020.
Romano, RM, Romano, MA, Moura, MO. et al. A exposição ao glifosato-Roundup causa atraso no início da puberdade em ratos machos. Brazilian Journal of Veterinary Research and Animal Science. 45(6):481-487, 2008.
Silva, DR, Moura, MI, Miguel, MP, et al. (2013). Avaliações histológica e histomorfométrica de testículos de bovinos com dermatite digital. Ciência Animal Brasileira, 14(3):391-398.
Downloads
Published
How to Cite
Issue
Section
License
Authors who publish with this journal agree to the following terms:
1) Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
2) Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
3) Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work.
