Age at First Calving and its Relationship with Efficiency Indicators in Nelore Cows in a Grazing System in the Bolivian Tropics

  • Ikeda Atsuko Universidad Nacional de Rosario, Facultad de Ciencia Veterinaria
  • Yoichiro Hayashi Cooperativa Agropecuaria Integral San Juan de Yapacani
  • Juan Antonio Pereira Faculty of Veterinary and Zootectist, Universidad Autonomo Gabriel Rene Moreno, Santa Cruz,
  • Pablo Roberto Marini Career of the Scientific Researcher (CIC-UNR), Universidad Nacional de Rosario
Keywords: Age at first calving, Grazing system, Nelore cows, Productive efficiency indicators

Abstract

Age at first calving is a factor attend for female cattle efficiency. The objective of this study was to evaluate the age at first calving and its relationship with productive efficiency indicators in Nelore cows in a grazing system of the Bolivian tropics. For the research, retrospective data corresponding to the period between 2005 and 2019 were used. The data belong to the Cooperativa Agropecuaria Integral San Juan de Yapacaní, Santa Cruz - Bolivia. The data corresponding to 259 Nelore breed cows, primiparous and multiparous, with a total of 800 calvings were used.  The age at first calving of the cows was 1098 ± 152 days for the total of the cows analyzed. That three groups of cows were found with significant differences (p≤0.05) among them according to age at first calving, where from that differentiation the cows that take longer to reach their first birth (1263 days) have an intermediate longevity (2203 days), the highest live weight, the lowest number of births and the shortest calving interval (440 days). The Accumulated Production showed that the cows of with significant differences (p≤0.05) among them according to age at first calving. In the same way the low age category showed the Calf Index. It is concluded that the age at first birth does not affect longevity, reproductive behavior and the number of births during their life. But when compared with efficiency indicators such as the Accumulated Production and Calf Index, the cows belonging to the low age category were the most efficient.

References

Azevêdo, D.M.M.R., et al., Produtividade Acumulada (PAC) das Matrizes em Rebanhos Nelore doNorte e Nordeste do Brasil. 2005, Revista Brasileria de Zootecnia 34: p. 54-59.

Boligon, A.A., L., at al., Study of relations among age at first calving, average weight gains and weights from weaning to maturity in Nellore cattle. 2010. R. Bras. Zootec., v.39, n.4: p.746-751. DOI:10.1590/S1516-35982010000400007

Day, M.L., and G.P., Nogueira, Management of age at puberty in beef heifers to optimize efficiency of beef production 2013. Animal Frontiers Vol. 3, No. 4: p.6-11. DOI :10.2527/af.2013-0027

Duitama, O.C., et al. Productividad acumulada y su relación genética con características reproductivas en hembras Brahman. 2013. Revista Medicina Veterinaria Zootecnista de Córdoba 18: p3658-3664. DOI:10.21897/rmvz.132

Flores, V.H.D., and T.T.J. Ortiz, Determinación de los parámetros reproductivos de losvientres Nelore en la estancia Parabano (Provincia Cordillera Departamento Santa Cruz). 2010.Tesis de grado FMVZ – UAGRM Santa Cruz – Bolivia: p.57.

García, G.A., et al., Caracterización productiva y reproductiva de las explotaciones ganaderas del bajo cauca y el litoral atlántico antioqueños. II. 2003. Comportamiento de cuatro grupos raciales Bos indicus en un sistema de bosque seco tropical (bs-T). Revista Colombiana de Ciencia Pecuaria 16: p.117-125.

Ikeda, A., Evaluación de la dinámica de la condición corporal en vacas Nelore y su efecto sobre índices productivos y reproductivos en un sistema de pastoreo intensivo de producción (prov. Ichilo Santa Cruz, Bolivia). 2018. Tesis de Maestría. Universidad Autónoma Gabriel René Moreno, Facultad de Ciencias Veterinarias (Bolivia) : p.106.

Ikeda A, and P.R. Marini,. The behaviour of nelore cows of different ages as an indicator of efficiency in a pasturing system in the bolivian tropic. 2018 WBC2018 Congress, Japón: WBC20 Congress.

Lôbo, R.N.B., Genetic parameters for reproductive traits of zebu cows in the semi-arid region of Brazil. 1998. Livest. Prod. Sci. 55: p. 245–248. DOI.10.1016/S0301-6226(98)00142-0

Lôbo, R.N.B., et al., Average estimates of genetic Parameters for beef and dairy cattle in tropical regions. 2000 Animal Breeding Abstract 68: p. 433-461.

Lopes, F.B., et al., Ajustes de curvas de crescimento em bovinos Nelore da região Norte do Brasil. 2011, Revista Brasileira Saúde Produccion Animal 12: p. 607-617.

Lopes, F.B., et al., Análises de dados longitudinais em bovinos Nelore Mocho por meio de modelos não lineares. 2016. Archivos de Zootecnia 65: p. 123-129.

Malhado, C.H.M., et al., Modelos não lineares utilizados para descrever o crescimento de bovinos da raça Nelore no estado da Bahia, 1. Efeito ambiental. 2009. Revista Brasileira Saúde Produccion Animal 10: p. 821-829.

Malhado, C.H.M., et al., Age at first calving of Nellore cattle in the semiarid region of northeastern Brazil using linear, threshold, censored and penalti models. 2013. Livest. Sci. 154: p. 28–33. DOI: 10.1016/j.livsci.2013.02.021

Nogueira, G.P., Puberty in South American Bos indicus (Zebu) cattle. 2004. Anim. Reprod. Sci. 82: p. 361–372. DOI: 10.1016/j.anireprosci.2004.04.007

Núñez-Domínguez, R., et al., Lifetime production of beef heifers calving first at two vs. three years of age. 1991. Journal of Animal Science 69: p. 3467-3479. DOI: 10.2527/1991.6993467x

Peredo, J.C., et al., Producción de ganado bovino en Bolivia. 2012. Federación de Ganadería de Santa Cruz, Santa Cruz, Bolivia: p. 3-20.

Rogers, P.L., et al., Evaluating longevityof composite beef females using survival analysis techniques. 2004. Journal of Animal Science 82: p. 860-866. DOI: 10.2527/2004.823860x

Rosa, A.N.,. Variabilidade fenotípica e genética do peso adulto e da Produtividade acumulada de matrizes em rebanhos de seleção da raça Nelore no Brasil. 1999. Ribeirão Preto: Universidade de São Paulo. Tese (Doutorado em Ciências) - Universidade de São Paulo: p. 114.

Rosa, A.N., et al., Peso adulto de Matrizes em Rebanhos de Seleção da Raça Nelore no Brasil. 2001. Revista Brasileria de Zootecnia 30: p. 1027-1036.

Schwengber, E.B., et al., Produtividade acumulada Como critério de seleção em fêmeas da raça Nelore. 2001. Ciência Rural, 31: p. 483-486. DOI: 10.1590/S0103-84782001000300020.

Segura-Correa, J.C., J.G. Magañ Monforte, F. Centurión-Castro, 2013. Efecto de grupo racial y edad al primer parto sobre el número de partos durante la vida útil de vacas cebú. Universidad Autónoma de Yucatán, Merida, Yucatán, México, 41-44. DOI:10.4067/S0301-732X2013000100007

Vukasinovic, N., and J. Moll, L. Casanova, Implementation of a routine genetic Evaluation for longevity based on survival analysis techniques in dairy cattle populations in Switzerland. 2001 Journal of Dairy Science 84: p. 2073-2080. DOI: 10.3168/jds.S0022-0302(01)74652-8

Published
2020-08-31
How to Cite
Atsuko, I., Hayashi, Y., Pereira, J. A., & Marini, P. R. (2020). Age at First Calving and its Relationship with Efficiency Indicators in Nelore Cows in a Grazing System in the Bolivian Tropics. European Journal of Applied Sciences, 8(4), 85-91. https://doi.org/10.14738/aivp.84.8865