Duration of the breeding season on the reproductive performance of Anglo-Nubian goats during dry and rainy periods


https://doi.org/10.4081/vsd.2014.5357
Vol. 4 No. 1 (2014)
Submitted: 18 February 2014
Accepted: 4 March 2014
Published: 8 May 2014
biostimulation, caprine, buck effect, fertility, gestation
Abstract Views: 1895
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Authors

  • José Monteiro Almeida-Irmão Instituto Federal de Educação, Ciência e Tecnologia de Pernambuco, Campus Barreiros, Brazil.
  • Leopoldo Mayer Freitas Neto Laboratório de Biotécnicas Aplicadas à Reprodução, Departamento de Medicina Veterinária da Universidade Federal Rural de Pernambuco, Brazil.
  • Marcelo Tigre Moura Laboratório de Biotécnicas Aplicadas à Reprodução, Departamento de Medicina Veterinária da Universidade Federal Rural de Pernambuco, Brazil.
  • Jairo Pereira Neves Laboratório de Reprodução Animal do Departamento de Medicina Veterinária da Faculdade de Agronomia e Medicina Veterinária da Universidade de Brasília, Brazil.
  • Paulo Fernandes Lima Laboratório de Biotécnicas Aplicadas à Reprodução, Departamento de Medicina Veterinária da Universidade Federal Rural de Pernambuco, Brazil.
  • Marcos Antônio Lemos Oliveira
    maloufrpe@uol.com.br
    Laboratório de Biotécnicas Aplicadas à Reprodução, Departamento de Medicina Veterinária da Universidade Federal Rural de Pernambuco, Brazil.
The study was aimed to evaluate the effect of breeding season (BS) duration on goat reproduction during dry (DS) and rainy (RS) periods. Females were kept 300 m apart from bucks for 60 days. Females were randomly distributed among BS groups of 25 (BS25), 35 (BS35), and 45 (BS45) days during DS and RS. All females cycled, except during BS45 in DS (95%). The duration of BS did not affect estrous incidence during DS and RS. The percentage of females with two estrous was similar in RS (BS25: 30%, BS35: 35%, BS45: 35%) and DS (BS25: 25%, BS35: 30%, BS45: 25%). Three estrous were observed in BS35 and BS45 during RS (5%). First estrous (FE) and second estrous (SE) were detected from days in BS25 (FE: 1-21, SE: 7-21), BS35 (FE: 1-23, SE: 6-27), and BS45 (FE:1-23, SE: 9-20) during RS. During DS, estrous were detected within days BS25 (FE: 1-17, SE: 6-23), BS35 (FE: 1-20, SE: 6-24), and BS45 (FE: 2-21, SE: 6-21). Pregnancy rates were similar in RS (BS25: 90%, BS35: 95%, BS45: 95%) and DS (BS25: 75%, BS35: 80%, BS45: 75%). In conclusion, goat BS can be shorten despite weather without any effect on reproduction.

Supporting Agencies

FACEPE, CNPq

Almeida-Irmão, J. M., Freitas Neto, L. M., Moura, M. T., Neves, J. P., Lima, P. F., & Oliveira, M. A. L. (2014). Duration of the breeding season on the reproductive performance of Anglo-Nubian goats during dry and rainy periods. Veterinary Science Development, 4(1). https://doi.org/10.4081/vsd.2014.5357

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