Revista de Investigaciones Altoandinas - Journal of High Andean Research

Vol. 22 No. 4 (2020)
Original articles

Effects of postovulatory copulation among alpacas Huacaya (Vicugna pacos) on the embryonic survival rate

pdf (Spanish)
  • Carla Fabiola Ramos Rivas,
  • Jesús Martín Urviola Sánchez,
  • Francisco Halley Rodríguez Huanca,
  • Víctor Raúl Leyva Vallejos
Carla Fabiola Ramos Rivas
Universidad Nacional del Altiplano de Puno, Puno, Peru
Jesús Martín Urviola Sánchez
Universidad Nacional del Altiplano de Puno, Puno, Peru
Francisco Halley Rodríguez Huanca
Universidad Nacional del Altiplano de Puno, Puno, Peru
Víctor Raúl Leyva Vallejos
Universidad Nacional Mayor de San Marcos, Lima, Peru

Published 2020-10-01

Keywords

  • alpaca,
  • additional mating,
  • ovulation,
  • embryonic survival

How to Cite

Ramos Rivas, C. F., Urviola Sánchez, J. M., Rodríguez Huanca, F. H., & Leyva Vallejos, V. R. (2020). Effects of postovulatory copulation among alpacas Huacaya (Vicugna pacos) on the embryonic survival rate. Revista De Investigaciones Altoandinas - Journal of High Andean Research, 22(4), 323–328. https://doi.org/10.18271/ria.2020.194

Abstract

The study was carried out at the La Raya Experimental Center of the National University of the Altiplano of Puno at an altitude of 4200m,with the aim of evaluating the effect of additional post-ovulation copulations on embryonic survival. Huacaya alpacas were used withpostpartum sexual rest greater than 20 days, with a preovulatory follicle greater than 7 mm, verified by ultrasound. For the controlledmating, 5 males from the breeding group were used. After breeding, 26 to 35 hours post-mating, ovulation was verified, selecting 47alpacas that ovulated, and distributed to the experimental groups: G1 (n = 16) with no additional mating, G2 (n = 15) received anadditional mating 24 hours post-ovulation, and G3 (n = 16) two additional mating 48 hours post-ovulation. On days 14 and 24 aftercopulation, the presence of the corpus luteum and embryonic vesicle was verified by ultrasound and receptivity of the female to the male.Results show a higher percentage of embryo survival trend in alpacas that received additional mating at 24 and 48 h post-ovulation thanthose that received only one ovulatory mating, showing at 14 days post-copulation an embryonic survival of 93.3% and 87.5%, in G2and G3 respectively, compared to G1 with 75%, and at 24 days post-copulation 86.7% and 87.5% in G2 and G3 respectively, comparedto G1 (62,5%). Although no significant differences were observed between groups (P>0.05), the difference is observed in the simplecorrespondence analysis between groups.

pdf (Spanish)

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