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Abecia JA, Chemineau P, Gómez A, et al. Exposure to Photoperiod-Melatonin-Induced, Sexually-Activated Rams after Weaning Advances the Resumption of Sexual Activity in Post-Partum Mediterranean Ewes Lambing in January. Vet Sci. 2017;4(1)doi: 10.3390/vetsci4010004.
Abecia, J. A., Chemineau, P., Gómez, A., Palacios, C., Keller, M., & Delgadillo, J. A. (2017). Exposure to Photoperiod-Melatonin-Induced, Sexually-Activated Rams after Weaning Advances the Resumption of Sexual Activity in Post-Partum Mediterranean Ewes Lambing in January. Veterinary sciences, 4(1), . https://doi.org/10.3390/vetsci4010004
Abecia, José A, et al. "Exposure to Photoperiod-Melatonin-Induced, Sexually-Activated Rams after Weaning Advances the Resumption of Sexual Activity in Post-Partum Mediterranean Ewes Lambing in January." Veterinary sciences vol. 4,1 (2017). doi: https://doi.org/10.3390/vetsci4010004
Abecia JA, Chemineau P, Gómez A, Palacios C, Keller M, Delgadillo JA. Exposure to Photoperiod-Melatonin-Induced, Sexually-Activated Rams after Weaning Advances the Resumption of Sexual Activity in Post-Partum Mediterranean Ewes Lambing in January. Vet Sci. 2017 Jan 21;4(1). doi: 10.3390/vetsci4010004. PMID: 29056663; PMCID: PMC5606613.
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Vet Sci. 2017 Jan 21;4(1). doi: 10.3390/vetsci4010004.

Exposure to Photoperiod-Melatonin-Induced, Sexually-Activated Rams after Weaning Advances the Resumption of Sexual Activity in Post-Partum Mediterranean Ewes Lambing in January.

Veterinary sciences

José A Abecia, Philippe Chemineau, Andrea Gómez, Carlos Palacios, Matthieu Keller, José A Delgadillo

Affiliations

  1. Instituto Universitario de Investigación en Ciencias Ambientales (IUCA), Departamento de Producción Animal y Ciencia de los Alimentos, Universidad de Zaragoza, Miguel Servet, 177, Zaragoza 50013, Spain. [email protected].
  2. Physiologie de la Reproduction et des Comportements, Institut National de la Recherche Agronomique, Centre National De La Recherche Scientifique (INRA, CNRS), Université de Tours, Agreenium, Nouzilly 37380, France. [email protected].
  3. Instituto Universitario de Investigación en Ciencias Ambientales (IUCA), Departamento de Producción Animal y Ciencia de los Alimentos, Universidad de Zaragoza, Miguel Servet, 177, Zaragoza 50013, Spain. [email protected].
  4. Departamento de Construcción y Agronomía, Facultad de Ciencias Agrarias y Ambientales, Filiberto Villalobos, Salamanca 37007, Spain. [email protected].
  5. Physiologie de la Reproduction et des Comportements, Institut National de la Recherche Agronomique, Centre National De La Recherche Scientifique (INRA, CNRS), Université de Tours, Agreenium, Nouzilly 37380, France. [email protected].
  6. Centro de Investigación en Reproducción Caprina, Universidad Autónoma Agraria Antonio Narro, Periférico Raúl López Sánchez y Carretera a Sante Fe, C.P. 27054, Torreón, Coahuila, Mexico. [email protected].

PMID: 29056663 PMCID: PMC5606613 DOI: 10.3390/vetsci4010004

Abstract

This study was aimed to determine whether the presence of sexually stimulated rams by photoperiodic and melatonin treatments can advance the resumption of post-partum sexual activity in Mediterranean ewes lambing in January and weaned at the end of the breeding season at 41°N, in March. Rams were exposed to two months of long days (16 h light/day) and given three melatonin implants at the end of the long days (sexually-activated rams; SAR). Control rams (CR) were exposed to the natural photoperiod. Thirty-six ewes weaned on 25 February were assigned to one of two groups. From 1 March to 30 June, one group was housed with four SAR males (SAR-treated;

Keywords: anestrus; melatonin; photoperiod treatment; ram

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