Resumen

VELIZ-DERAS, Francisco Gerardo; MONTES-ROSALES, Lorena Marlene; GAYTAN-ALEMAN, Leticia Romana  y  ANGEL-GARCIA, Oscar. Reproductive response of nulliparous ewes exposed to rams treated with selenium plus vitamin E. Ecosistemas y recur. agropecuarios [online]. 2023, vol.10, n.3, e3369.  Epub 26-Abr-2024. ISSN 2007-901X.  https://doi.org/10.19136/era.a10n3.3369.

The reproductive response of nulliparous-anovulatory Dorper ewes exposed to rams treated with selenium (Se) plus vitamin E (Vit. E) was evaluated. A first of rams was treated (GT; n = 5) with 1 mg of Se plus 70 IU of Vit. E x every 10 kg of LW via IM, and a second group, control (GC; n = 5) with 1 mL of saline solution, both treatments were applied every 7 days x 28 days. At the end of the treatments, the groups of rams were placed in contact with two groups of females (n = 17 each), and the appetitive (CSA) and consummatory (CSC) sexual behavior of the rams was recorded. The reproductive response of ewes exposed to males was similar (P > 0.05) in both treatments. Treatment with Se plus Vit. E did not stimulate the sexual behavior of the rams and therefore the reproductive response of the ewes was not enhanced.

Palabras llave : Estrus cycle; sexual behavior; Dorper; male effect; sheep.

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