Reproductive outcomes using different distances for preconditioning for the male effect in Anglo Nubian goats during two distinct climate seasons

  • Carlos Geraldo Tenório Alves Instituto Federal de Educação, Ciência e Tecnologia de Pernambuco, Belo Jardim, PE
  • José Carlos Ferreira-Silva Universidade Federal Rural de Pernambuco, Departamento de Medicina Veterinária, Recife
  • José Monteiro Almeida-Irmão Instituto Federal de Educação, Ciência e Tecnologia de Pernambuco, Barreiros, PE
  • Marcelo Tigre Moura Instituto Federal de Educação, Ciência e Tecnologia de Pernambuco, Barreiros, PE
  • Claúdio Coutinho Bartolomeu Universidade Federal Rural de Pernambuco, Departamento de Medicina Veterinária, Recife, PE
  • Paulo Fernandes Lima Universidade Federal Rural de Pernambuco, Departamento de Medicina Veterinária, Recife, PE
  • Marcos Antonio Lemos de Oliveira Universidade Federal Rural de Pernambuco, Departamento de Medicina Veterinária, Recife, PE
Palavras-chave: bioestimulation, goat, small ruminants

Resumo

The objective of the present study was to determine if separation distance between bucks and does during two distinct climate seasons could affect the reproductive performance of goats subjected to a 45-day mating season (MS). Anglo Nubian does (n = 120) were kept apart from bucks at distances of 2 m (T1), 300 m (T2), and 2000 m (T3) for 60 days prior to the 45-day MS during two distinct climate seasons [dry season (DS, February to March) and rainy season (RS, September to October)] in Sertânia, Pernambuco state, Brazil. There were no effects of distance of separation between bucks and does in any response variable evaluated. However, during the DS, the mean of the first estrous manifestation varied significantly (P>0.05) between groups [7.13±4.49 (T1), 8.84±5.64 (T2), and 6.37±4.21 (T3) days] and during the RS [7.33±5.74 (T1), 6.60±4.88 (T2) and 8.10±4.87 (T3) days]. Similar (P>0.05) estrous induction rates were found during both the DS [100.00% (T1), 100.00% (T2) and 95.50% (T3)] and the RS [100.00% (T1), 100.00% (T2) and 100.00% (T3)]. The estrous synchronization rate was found to be lower during the DS [36.60%; 30.00% (T1), 35.00% (T2) and 45.00% (T3)] than during the RS [56.60%; 50.00% (T1), 60.00% (T2) and 60.00% (T3)]. Pregnancy rates during the DS [P>0.05; 80.00% (T1), 70.00% (T2) and 75.00% (T3)] were lower than during the RS [P>0.05; 90.00% (T1), 90.00% (T2) and 95.00%(T3)]. In summary, the separation distance between bucks and does did not affect the reproductive outcome of Anglo Nubian goats over a 45-day MS under tropical conditions. Greater reproductive outcome was observed during the RS than the DS regardless of the separation distance between bucks and does. 
Publicado
31-01-2015
Como Citar
Alves, C., Ferreira-Silva, J., Almeida-Irmão, J., Moura, M., Bartolomeu, C., Lima, P., & Oliveira, M. (2015). Reproductive outcomes using different distances for preconditioning for the male effect in Anglo Nubian goats during two distinct climate seasons. Boletim De Indústria Animal, 72(1), 69-76. https://doi.org/10.17523/bia.v72n1p69
Seção
REPRODUÇÃO ANIMAL

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