Testicular measures in entire and unilaterally castrated Chilean horse breed stallions

Authors

  • Lisandro Muñoz-Alonzo Departamento de Ciencias Clínicas, Facultad de Ciencias Veterinarias, Universidad de Concepción, Concepción
  • Felipe Morales Quintana Departamento de Ciencias Pecuarias, Facultad de Ciencias Veterinarias, Universidad de Concepción, Concepción
  • Reinaldo Ortiz Ramírez Departamento de Ciencias Clínicas, Facultad de Ciencias Veterinarias, Universidad de Concepción, Concepción
  • Jaime Cruces Leal Departamento de Ciencias Clínicas, Facultad de Ciencias Veterinarias, Universidad de Concepción, Concepción
  • Mario Briones Luengo Departamento de Ciencias Pecuarias, Facultad de Ciencias Veterinarias, Universidad de Concepción, Concepción
  • Fernando Saravia Ramos Departamento de Ciencias Pecuarias, Facultad de Ciencias Veterinarias, Universidad de Concepción, Concepción

DOI:

https://doi.org/10.15381/rivep.v27i2.11662

Keywords:

testicular volume, daily sperm production, equine

Abstract

The aim of this study was to determine the testicular size and to estimate the daily sperm production (DSP) in entire and unilaterally castrated males of the Chilean Horse breed. Sixty one (31 entire and 30 unilaterally castrated) stallions, with ages between 3 and 20 years of age were studied. A scrotal caliper was used to measure height, width and length of testicles. Testicular volume (TV) was calculated and DSP was estimated using formulae proposed by Sertich (2011).  Testicular measures in entire stallions were larger than expected and without statistical difference between testicles. The estimated DSP in entire stallions was 7.67 ± 2.32 x 109 spermatozoa. There were no differences in size related to the remaining testicle in unilaterally castrated stallions, but height, width and TV were larger than in entire stallions (p<0.05). DSP in unilaterally castrated stallions was 5.13 ± 1.84 x 109 spermatozoa, and it was a 33% lower compared to entire males (p<0.0001). Results obtained allow concluding that testicular measures in Chilean Horse stallions are larger than expected for their body size.

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Published

2016-06-15

Issue

Vol. 27 No. 2 (2016)

Section

Artículos Primarios

License

Copyright (c) 2016 Lisandro Muñoz-Alonzo, Felipe Morales Quintana, Reinaldo Ortiz Ramírez, Jaime Cruces Leal, Mario Briones Luengo, Fernando Saravia Ramos

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 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

Muñoz-Alonzo, L., Morales Quintana, F., Ortiz Ramírez, R., Cruces Leal, J., Briones Luengo, M., & Saravia Ramos, F. (2016). Testicular measures in entire and unilaterally castrated Chilean horse breed stallions. Revista De Investigaciones Veterinarias Del Perú, 27(2), 303-308. https://doi.org/10.15381/rivep.v27i2.11662