Evaluation of an oestrus synchronization protocol in sheep with temporary weaning for artificial insemination at fixed time

Authors

  • Saúl Espinoza Molina Universidad Nacional del Centro del Perú, El Tambo, Huancayo
  • Yulyssa del Pilar Gamarra Reyes Universidad Nacional del Centro del Perú, El Tambo, Huancayo
  • Chessyra Ninoska Ticona Huaroco Universidad Nacional del Centro del Perú, El Tambo, Huancayo
  • Mario CCari Huayta Estación Experimental Agraria Santa Ana, Instituto Nacional de Innovación Agraria (INIA), El Tambo, Huancayo
  • Gabriela Espinoza Rojas Instituto General de Investigación de la Universidad Nacional del Centro del Perú, El Tambo, Huancayo
  • Uri Harold Harold Perez Guerra Laboratorio de Reproducción Animal, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional del Altiplano, Puno
  • Danny Julio Cruz Flores Estación Experimental Agraria Santa Ana, Dirección de Desarrollo Tecnológico Agrario, Instituto Nacional de Innovación Agraria (INIA), El Tambo, Huancayo

DOI:

https://doi.org/10.15381/rivep.v31i3.16820

Keywords:

sheep, weaning, equine chorionic gonadotropin, artificial insemination

Abstract

The research aimed to evaluate a protocol of induction of oestrous in lactating ewes with hormonal treatment of progestins and eCG with temporary weaning of lambs for artificial insemination at a fixed time by transcervical route using refrigerated semen on the presentation of oestrous and pregnancy and lambing rate. In total, 37 ewes were distributed among three treatments: T1, lactating ewes with temporary weaning (n=15); T2, lactating ewes with lamb at foot (n=10); T3, dry ewes without lamb (n=12). Temporary weaning was for 48 h prior to insemination. T1 and T3 presented a higher rate of manifest oestrous (100 and 91.66%, respectively) than T2 (60%; p<0.05). The non-return heat rate at 14-17 days post-service was statistically similar between groups (93.33, 60.0, 91.66% for T1, T2 and T3, respectively). Similarly, the pregnancy percentage by ultrasound at 45 days and the percentage of lambing showed similar values and were statistically similar (93.33, 60.0 and 66.67 and for T1, T2 and T3, respectively).

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Published

2020-09-29

Issue

Vol. 31 No. 3 (2020)

Section

Artículos Primarios

License

Copyright (c) 2020 Saúl Espinoza Molina, Yulyssa del Pilar Gamarra Reyes, Chessyra Ninoska Ticona Huaroco, Mario CCari Huayta, Gabriela Espinoza Rojas, Uri Harold Harold Perez Guerra, Danny Julio Cruz Flores

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

AUTHORS RETAIN THEIR RIGHTS:

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b. Authors retain their right to share, copy, distribute, perform and publicly communicate their article (eg, to place their article in an institutional repository or publish it in a book), with an acknowledgment of its initial publication in the Revista de Investigaciones Veterinarias del Perú (RIVEP).

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How to Cite

Espinoza Molina, S., Gamarra Reyes, Y. del P., Ticona Huaroco, C. N., CCari Huayta, M., Espinoza Rojas, G., Perez Guerra, U. H. H., & Cruz Flores, D. J. (2020). Evaluation of an oestrus synchronization protocol in sheep with temporary weaning for artificial insemination at fixed time. Revista De Investigaciones Veterinarias Del Perú, 31(3), e16820. https://doi.org/10.15381/rivep.v31i3.16820