Libido and serving skills of Zebu cattle bulls
DOI:
https://doi.org/10.5433/1679-0359.2021v42n5p3057Keywords:
Andrological, Behavioral assessment, Bos taurus indicus, Failure rates.Abstract
The goal of this study was to evaluate the rejection rates of Zebu bulls during behavioral assessment (libido and serving ability) and the importance of this step in bull breeding soundness evaluation (BBSE). A total of 1,534 bulls reared in the state of Rio Grande do Sul, Brazil, of Nelore (1,340), Brahman (76), Guzerá (98), and Tabapuã (210) breeds were evaluated. The evaluation consisted of four steps. Step I was the general physical examination, Step II genital tract examination, Step III semen evaluation, and Step IV behavioral assessment of libido and the ability to complete copulation. To evaluate the relationship between the binary variables of approved or rejected during different steps of the BBSE, and age groups (young and mature bulls), chi-square tests and logistic regression were used. The general rejection rates in the BBSE were 5.64% and 15.20% for young and mature Zebu bulls, respectively. ¬Problems with the sexual behavior (libido and/or serving ability) of bulls accounted for the rejection of 0.46% and 2.29% of young and mature Zebu bulls, respectively. The lack of libido and serving ability was shown to be an important problem concerning the total number of possible causes of Zebu bull rejection during the BBSE. This result suggests that the behavioral step should be performed regularly, rather than being complementary to the standard BBSE in Zebu cattle.Downloads
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References
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Coulter, G. H., Mapletoft, R. J., Kozub, G. C., & Cates, W. F. (1987). Scrotal circumference of two-year-old bulls of several beef breeds. Theriogenology, 27(3), 485-491. doi: 10.1016/0093-691X(87)90236-6
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Menegassi, S. R. O., Barcellos, J. O. J., Peripolli, V., Borges, J. B. S., & Bernardi, M. L. (2012). Causes of rejection of beef bulls in breeding soundness evaluation. Revista Brasileira de Zootecnia, 41(7), 1648-1653. doi: 10.1590/S1516-35982012000700013
Menegassi, S. R. O., Barcellos, J. O. J., Peripolli, V., & Camargo, C. M. (2011a). Behavioral assessment during breeding soundness evaluation of beef bulls in Rio Grande do Sul. Animal Reproduction, 8(3-4), 77-80.
Menegassi, S. R. O., Barcellos, J. O. J., Peripolli, V., Pereira, P. R. R. X., Borges, J. B. S., & Lampert, V. N. (2011b). Measurement of scrotal circumference in beef bulls in Rio Grande do Sul. Arquivo Brasileiro de Medicina Veterinária e Zootecnia, 63(1), 87-93. doi: 10.1590/S0102-09352011000100014
Muller, I., & Menegassi, S. R. O. (2018). Pedido nacional de invenção, modelo de utilidade, certificado de adição de invenção e entrada na fase nacional do PCT. Sistema e método de monitoramento de comportamento e atividade reprodutiva de animais em rebanho. 20/03/2018 BR102018005455-4 Brasil: Universidade Federal do Rio Grande do Sul. Porto Alegre.
Parkinson, T. J. (2004). Evaluation of fertility and infertility in natural service bulls. Veterinary Journal, 168(3), 215-229. doi: 10.1016/j.tvjl.2003.10.017
Petherick, J. C. (2005). A review of some factors affecting the expression of libido in beef cattle and individual bull and herd fertility. Applied Animal Behaviour Science, 90(3-4), 185-205. doi: 10.1016/j. applanim.2004.08.021
Coulter, G. H., Mapletoft, R. J., Kozub, G. C., & Cates, W. F. (1987). Scrotal circumference of two-year-old bulls of several beef breeds. Theriogenology, 27(3), 485-491. doi: 10.1016/0093-691X(87)90236-6
Hancock, A. S., Younis, P. J., Beggs, D. S., Mansell, P. D., Stevenson, M. A., & Pyman, M. F. (2016). An assessment of dairy herd bulls in southern Australia: 1. Management practices and bull breeding soundness evaluations. Journal of Dairy Science, 99(12), 9983-9997. doi: 10.3168/jds.2015-10493
Lopes, F. G., Koetz, C., Jr., Barca, F. A., Jr., Claus, L. A. M., Menegassi, S. R. O., & Carrer, L., Fº. (2013). Utilização de dois métodos de classificação andrológica por pontos em touros jovens da raça Braford. PUBVET, 7(12), 1002-1136.
Menegassi, S. R. O., Barcellos, J. O. J., Peripolli, V., Borges, J. B. S., & Bernardi, M. L. (2012). Causes of rejection of beef bulls in breeding soundness evaluation. Revista Brasileira de Zootecnia, 41(7), 1648-1653. doi: 10.1590/S1516-35982012000700013
Menegassi, S. R. O., Barcellos, J. O. J., Peripolli, V., & Camargo, C. M. (2011a). Behavioral assessment during breeding soundness evaluation of beef bulls in Rio Grande do Sul. Animal Reproduction, 8(3-4), 77-80.
Menegassi, S. R. O., Barcellos, J. O. J., Peripolli, V., Pereira, P. R. R. X., Borges, J. B. S., & Lampert, V. N. (2011b). Measurement of scrotal circumference in beef bulls in Rio Grande do Sul. Arquivo Brasileiro de Medicina Veterinária e Zootecnia, 63(1), 87-93. doi: 10.1590/S0102-09352011000100014
Muller, I., & Menegassi, S. R. O. (2018). Pedido nacional de invenção, modelo de utilidade, certificado de adição de invenção e entrada na fase nacional do PCT. Sistema e método de monitoramento de comportamento e atividade reprodutiva de animais em rebanho. 20/03/2018 BR102018005455-4 Brasil: Universidade Federal do Rio Grande do Sul. Porto Alegre.
Parkinson, T. J. (2004). Evaluation of fertility and infertility in natural service bulls. Veterinary Journal, 168(3), 215-229. doi: 10.1016/j.tvjl.2003.10.017
Petherick, J. C. (2005). A review of some factors affecting the expression of libido in beef cattle and individual bull and herd fertility. Applied Animal Behaviour Science, 90(3-4), 185-205. doi: 10.1016/j. applanim.2004.08.021
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Published
2021-07-02
How to Cite
Menegassi, S. R. O., Peripolli, V., Canozzi, M. E. A., & Barcellos, J. O. J. (2021). Libido and serving skills of Zebu cattle bulls. Semina: Ciências Agrárias, 42(5), 3057–3064. https://doi.org/10.5433/1679-0359.2021v42n5p3057
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