La aplicación de implantes de melatonina evita la caída de la concentración espermática en la contra-estación reproductiva en moruecos Assaf
- Escobar, C. 1
- Macedo, C. 2
- Morales-Méndez, S. 3
- Crespo-Félez, I. 1
- Martín, B. 1
- Manjarín, R. 2
- Domínguez, J.C. 4
- Martínez-Pastor, F. 4
- González-Montaña, J.R. 4
- 1 Instituto de Desarrollo Ganadero y Sanidad Animal
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2
California Polytechnic State University
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California Polytechnic State University
San Luis Obispo, Estados Unidos
- 3 UNAM
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4
Universidad de León
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- María Jesús Alcalde Aldea (coord.)
- Begoña Panea Doblado (coord.)
- Valentín Pérez Pérez (coord.)
- Raúl Bodas Rodríguez (coord.)
- Francisco Saura Armelles (coord.)
- Juan José Ramos Antón (coord.)
Editorial: Sociedad Española de Ovinotecnia y Caprinotecnia SEOC
ISBN: 978-84-697-5289-0
Ano de publicación: 2018
Páxinas: 621-626
Congreso: Sociedad Española de Ovinotecnia y Caprinotecnia (SEOC). Jornadas (43. 2018. Zaragoza)
Tipo: Achega congreso
Resumo
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.