Artificial photoperiod stimulates the “male effect” in goats and sheep: bibliometric analysis
DOI:
https://doi.org/10.59741/agri.v4i2.47Keywords:
Anestrus, sexual behavior, testosterone, ovulationAbstract
Artificial stimulation of the "male effect" through photoperiod manipulation in goats and sheep is a practice that allows regulating the reproductive cycles and behavior of these species. Its implementation has gained relevance in the agricultural sector, as it optimizes reproductive efficiency and facilitates the synchronization of breeding throughout the year, overcoming natural seasonal limitations. The objective of this research was to characterize the global scientific production on the use of artificial photoperiod to stimulate the "male effect" in goats and sheep. To this end, a bibliographic search was conducted in the Scopus database on February 26, 2025, using the algorithm: (TITLE-ABS-KEY ("male effect" OR "ram effect" OR "buck effect") AND TITLE-ABS-KEY (goat OR caprine OR sheep OR ovine) AND TITLE-ABS-KEY (photoperiod OR photoperiodic OR "long days")), applied to the titles, abstracts, and keywords of the articles. The bibliometric analysis was carried out using VOSviewer, Harzing's Publish or Perish, and Tree of Science (ToS) software. Ninety-nine documents published between 1983 and 2024 were identified, of which 86 were original articles (86.87%) and 9 were review articles. Mexico was the country with the highest scientific production on the subject (63 publications), followed by France (54) and Spain (28). The most productive author was Delgadillo, J.A., with 49 articles and 1027 citations. In addition, two main co-authorship networks were identified: the first led by Delgadillo, J.A. and Chemineau, P., and the second by Vielma, J. and Flores, J.A. The growing interest in the use of photoperiod to stimulate the "male effect" highlights its fundamental role in synchronizing reproductive activities, allowing for the optimization of breeding schedules and improving lamb and kid production rates.
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