PROTOCOLS OF ESTRUS INDUCTION AND SYNCHRONIZATION IN EWE

Authors

  • Caliê Castilho UNOESTE
  • Marcelo Ferreira de Almeida UNOESTE
  • Marcelo Zoccolaro Costa FEA
  • Ângelo Gardim De Cesare UNOESTE
  • Luis Roberto de A. Gabriel Filho UNOESTE

DOI:

https://doi.org/10.5216/cab.v14i1.13378

Keywords:

Animal reproduction

Abstract

The objective of this study was to evaluate the effects of progestagen treatment of different duration, PGF2a and ram effect on estrus induction synchronization in ewes. In Experiment I, ewes (n=48) received vaginal sponges with MAP (medroxyprogesterone) for nine or 14 days (G-9 and G-14, respectively), followed by PGF2a treatment and estrus detection. There were no differences in estrus (69.6 and 80%), conception (50 and 55%), and pregnancy rates (34.8 e 44.0%) between G-9 and G-14, respectively. In Experiment II, ewes (n=151) were divided into three groups: G-6 received vaginal sponges with MAP for 6 days, followed by PGF2a treatment and estrus detection, G-PGF received only PGF2a treatment, and G-RF were only exposed to males after a period of separation. Estrus rates were greater (p<0.05) in G-6 and G-PGF groups (58 and 39%, respectively) than in G-EF group (11%). In conclusion, it was possible to reduce the duration of progestagen treatment; however, the use of PGF2a during the breeding season transition without progestagen seemed to reduce estrus rates.

 

KEYWORDS: MAP; PGF2a; ram effect; Suffolk.

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Author Biographies

Caliê Castilho, UNOESTE

Docente Mestrado em Ciência Animal e Medicina Veterinária, UNOESTE, Presidente Prudente-SP

Marcelo Ferreira de Almeida, UNOESTE

Mestre em Ciência Animal, UNOESTE, Presidente Prudente-SP;

Marcelo Zoccolaro Costa, FEA

Docente Medicina Veterinária, FEA, Andradina-SP

Ângelo Gardim De Cesare, UNOESTE

Discente Medicina Veterinária, UNOESTE, Presidente Prudente-SP

Luis Roberto de A. Gabriel Filho, UNOESTE

Docente, UNESP, Tupã-SP

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Published

2013-03-26

How to Cite

CASTILHO, C.; DE ALMEIDA, M. F.; COSTA, M. Z.; DE CESARE, Ângelo G.; GABRIEL FILHO, L. R. de A. PROTOCOLS OF ESTRUS INDUCTION AND SYNCHRONIZATION IN EWE. Brazilian Animal Science/ Ciência Animal Brasileira, Goiânia, v. 14, n. 1, p. 91–97, 2013. DOI: 10.5216/cab.v14i1.13378. Disponível em: https://revistas.ufg.br/vet/article/view/13378. Acesso em: 23 nov. 2024.

Issue

Vol. 14 No. 1 (2013)

Section

Veterinary Medicine

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