Male effect associated with suckling interruption on the reproductive performance of Santa Inês ewes

  • Eduardo Luiz Cavalcante Caldas Universidade Federal de Sergipe, Laboratório de Anatomia Veterinária, Aracaju, SE.
  • José Carlos Ferreira-Silva Universidade Federal Rural de Pernambuco, Departamento de Medicina Veterinária, Recife, PE.
  • Leopoldo Mayer Freitas Neto Universidade Federal Rural de Pernambuco, Departamento de Medicina Veterinária, Recife, PE.
  • Humberto Fernandes Veloso Neto Universidade Federal Rural de Pernambuco, Departamento de Medicina Veterinária, Recife, PE.
  • Marcelo Tigre Moura 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.
  • Maico Henrique Barbosa dos Santos Fundação Educacional de Ituverava, Curso de Medicina Veterinária, Ituverava, SP.
  • Marcos Antônio Lemos de Oliveira Universidade Federal Rural de Pernambuco, Departamento de Medicina Veterinária, Recife, PE.
Palavras-chave: anestrous, biostimulation, reproduction, sheep.

Resumo

This study aimed to evaluate the effect of temporary suckling interruption associated with the male effect on reproductive performance of pluriparous Santa Inês ewes. The females were kept apart from the males for 60 days and then randomly distributed into three treatments associated with the male effect (DT0, DT24 and DT48); in DT0, there was no suckling interruption; in DT24, suckling was interrupted for 24 hours, and in DT48, sucking was interrupted for 48 hours. Estrous distribution was observed within 31 (DT0), 27 (DT24) and 38 (DT48) days of the breeding season. Estrous synchronization up to the 5th day of the mating season was observed in 15% (DT0), 30% (DT24) and 25% (DT48) of the females, with no difference among treatments. Estrous percentages were 90% (DT0), 100% (DT24) and 100% (DT48), with no difference among treatments. Pregnancy rates were 38.4% (DT0), 60.0% (DT24) and 45.0% (DT48) with no difference among treatments. Prolificacy was 1.43 (DT0), 1.17 (DT24) and 1.22 (DT48) and did not differ between treatments. In conclusion, temporary suckling interruption associated with the male effect is efficient to induce estrous but not to synchronize estrous or increase the pregnancy rates and prolificacy of Santa Inês ewes during a 45-day breeding season.
Publicado
07-02-2015
Como Citar
Caldas, E., Ferreira-Silva, J., Freitas Neto, L., Veloso Neto, H., Moura, M., Lima, P., Santos, M., & Oliveira, M. (2015). Male effect associated with suckling interruption on the reproductive performance of Santa Inês ewes. Boletim De Indústria Animal, 72(2), 117-123. https://doi.org/10.17523/bia.v72n2p117
Seção
REPRODUÇÃO ANIMAL