La aplicación de implantes de melatonina evita la caída de la concentración espermática en la contra-estación reproductiva en moruecos Assaf

  1. Escobar, C. 1
  2. Macedo, C. 2
  3. Morales-Méndez, S. 3
  4. Crespo-Félez, I. 1
  5. Martín, B. 1
  6. Manjarín, R. 2
  7. Domínguez, J.C. 4
  8. Martínez-Pastor, F. 4
  9. González-Montaña, J.R. 4
  1. 1 Instituto de Desarrollo Ganadero y Sanidad Animal
  2. 2 California Polytechnic State University
    info

    California Polytechnic State University

    San Luis Obispo, Estados Unidos

    ROR https://ror.org/001gpfp45

  3. 3 UNAM
  4. 4 Universidad de León
    info

    Universidad de León

    León, España

    ROR https://ror.org/02tzt0b78

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Book:
XLIII Congreso Nacional y XIX Congreso Internacional de la Sociedad Española de Ovinotecnia y Caprinotecnia (SEOC)
  1. María Jesús Alcalde Aldea (coord.)
  2. Begoña Panea Doblado (coord.)
  3. Valentín Pérez Pérez (coord.)
  4. Raúl Bodas Rodríguez (coord.)
  5. Francisco Saura Armelles (coord.)
  6. Juan José Ramos Antón (coord.)

Publisher: Sociedad Española de Ovinotecnia y Caprinotecnia SEOC

ISBN: 978-84-697-5289-0

Year of publication: 2018

Pages: 621-626

Congress: Sociedad Española de Ovinotecnia y Caprinotecnia (SEOC). Jornadas (43. 2018. Zaragoza)

Type: Conference paper

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Abstract

Melatonin is a fundamental hormone in the seasonal control of reproduction, mediating changes in the photoperiod. In sheep, the most favorable breeding season is autumn-winter (short-days species). The objective of this study is to test if a reproductive control regime based on melatonin implants in February prevents the fall of the seasonal seminal quality in Assaf rams in the non-breeding season. Sixteen rams were electroejaculated in February (without implants), March (one month after implant application) and July (implants exhausted). Sperm quality was evaluated as: sperm concentration, motility, abnormal forms, viability and acrosomal integrity (flow cytometry). Implants prevented the drop in sperm concentration (1029±191 vs. 1283±257 ×106 ml-1, P>0.05), which was evident in July (446±184 ×106 ml-1, P<0.05). Motility, viability and acrosomal status were not affected. In contrast, abnormal forms increased from February (5.3%±1.7) to March (19.7%±3.0, P<0.05), possibly due to the reactivation of spermatogenesis. In conclusion, application of melatonin implants at the beginning of the non-breeding season prevents the drop of sperm production, without important effects on seminal quality. The increase in abnormal forms does not seem to have a negative effect.

Data source: Dialnet