Effect of different protocols for estrus synchronization on reproductive performance of Santa Inês ewes under Amazon environmental conditions

  • Regina Oliveira da Silva Universidade Federal de Roraima
  • Roseane Pinto Martins de Oliveira Universidade Federal do Amazonas http://orcid.org/0000-0002-5495-0904
  • André Ferreira Silva Intituto Federal de Educação, Ciência e Tecnologia de Roraima
  • Franklyn Ferreira de Oliveira Agência de Desenvolvimento Sustentável do Amazonas
  • João Paulo Ferreira Rufino Universidade do Estado do Amazonas
  • Márcia Lorena Monteiro da Silva Universidade Federal do Amazonas
Palavras-chave: ewes; hormones; pregnancy; progesterone; reproduction.

Resumo

 The objective of this study was to evaluate the effect of different hormonal protocols on the reproductive performance of Santa Inês ewes in Amazon environmental conditions. Twenty-two Santa Inês ewes between 3 and 4 years-old were distributed in a randomized block experimental design, where the treatments consisted of two protocols for estrus synchronization (short and long) with eleven animals each. Data on the occurrence of estrus were described for each protocol. Data of estrus, pregnancy, and prolificity were firstly subjected to ANOVA and a subsequent Tukey’s test. Results were considered significant at p ≤ 0.05. The short-term protocol presented an interesting successful rate, where above 70% ewes tested had estrus. The long-term protocol also achieved a high successful rate, where above 80% ewes tested had estrus. However, comparing the protocols, the long-term protocol presented better results of positive estrus and pregnancy rates in ewes. Thus, it can be concluded that both protocols presented satisfactory results regarding estrus manifestation, and prolificity (lambs produced per ewe). However, under Amazon environmental conditions, the long-term protocol presented better results regarding positive manifestation of estrus and pregnancy rate.

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Publicado
2020-08-19
Como Citar
Silva, R. O. da, Oliveira, R. P. M. de, Silva, A. F., Oliveira, F. F. de, Rufino, J. P. F., & Silva, M. L. M. da. (2020). Effect of different protocols for estrus synchronization on reproductive performance of Santa Inês ewes under Amazon environmental conditions . Acta Scientiarum. Animal Sciences, 43(1), e48954. https://doi.org/10.4025/actascianimsci.v43i1.48954
Seção
Produção Animal

0.9
2019CiteScore
 
 
29th percentile
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