Fertility in Holstein cows (Bos taurus) inseminated with sexed semen of Gyr bulls (Bos indicus) in small-scale dairy herds at Irrigation Majes, Arequipa, Peru

Authors

  • Olger Ramos Universidad Nacional Mayor de San Marcos, Facultad de Medicina Veterinaria, Estación Experimental del Centro de Investigación IVITA-Huaral. Lima, Perú
  • Carlos Arana Universidad Nacional Mayor de San Marcos, Facultad de Medicina Veterinaria, Estación Experimental del Centro de Investigación IVITA-El Mantaro, Jauja. Lima, Perú
  • Cristina Garcia Universidad Nacional Mayor de San Marcos, Facultad de Medicina Veterinaria, Clínica de Animales Mayores. Lima, Perú https://orcid.org/0000-0002-8901-1392
  • Alfredo Delgado Universidad Nacional Mayor de San Marcos, Facultad de Medicina Veterinaria, Clínica de Animales Mayores. Lima, Perú

DOI:

https://doi.org/10.15381/rivep.v33i3.22901

Keywords:

Holstein, sexed semen, Gyr, fertility

Abstract

The present study aimed to determine the conception rate at first service and the birth rate, as well as the percentage of female calves born using Gyr sexed semen in Holstein cows. Artificial insemination (AI) was performed on 1174 second and third calving cows during December 2011 to October 2012 in small-scale farms of the Majes Irrigation, Arequipa, Peru. The AI was carried out 12 hours after the visual detection of heat and the pregnancy diagnosis was done by rectal palpation 45-60 days after the service. The conception rate in 2nd calving animals was in a range of 37 to 77%, while for 3rd calving animals it was in the range of 39 to 88%. The birth rate was in the range of 32 to 71% and 38 to 85% for cows of 2nd and 3rd calving, respectively, without evidence of an effect of seasonality on the conception rate or birth rate. The overall conception rate was 56% and the birth rate was 54%. The percentage of female calves was 82% and male calves 18%. It is concluded that the number of births and seasonality do not influence conception and birth rates when using Gyr sexed semen; likewise, the use of Gyr sexed semen in Holstein cows would be a good reproductive option.

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Published

2022-06-29

Issue

Vol. 33 No. 3 (2022)

Section

Artículos Primarios

License

Copyright (c) 2022 Olger Ramos, Carlos Arana, Cristina Garcia, Alfredo Delgado

Creative Commons License

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

AUTHORS RETAIN THEIR RIGHTS:

a. Authors retain their trade mark rights and patent, and also on any process or procedure described in the article.

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).

c. Authors retain theirs right to make a subsequent publication of their work, to use the article or any part thereof (eg a compilation of his papers, lecture notes, thesis, or a book), always indicating the source of publication (the originator of the work, journal, volume, number and date).

How to Cite

Ramos, O., Arana, C., Garcia, C., & Delgado, A. (2022). Fertility in Holstein cows (Bos taurus) inseminated with sexed semen of Gyr bulls (Bos indicus) in small-scale dairy herds at Irrigation Majes, Arequipa, Peru. Revista De Investigaciones Veterinarias Del Perú, 33(3), e22901. https://doi.org/10.15381/rivep.v33i3.22901