Fecha/hora: 16/06/2024 07:35:01

Biblioteca(s): | INIA Las Brujas.
Fecha corriente: | 21/10/2014
Fecha de la última actualización: | 25/09/2019
Autoria: | MULVANEY, F.J.; MORRIS, S.T.; KENYON, P.R.; MOREL, P.C.H.; WEST, D.M.; VIÑOLES, C.; GLOVER, K.M.M.
Afiliación: | CAROLINA VIÑOLES GIL, Instituto Nacional de Investigación Agropecuaria (INIA), Uruguay.
Título: | Comparison between the reproductive performance of ewe hoggets and mature ewes following a progesterone-based oestrus synchronization protocol.
Año de publicación: | 2013
Fuente/Imprenta: | New Zealand Journal of Agricultural Research, 2013, v.56, no.4, p. 288-296.
Série: | 0028-8233
DOI: | 10.1080/00288233.2013.842176
Idioma: | Inglés
Notas: | Article history: Received 27 May 2013 // Accepted 5 September 2013.

Contenido:

ABSTRACT.

Two experiments were conducted to compare the reproductive performance of ewe hoggets and mature ewes. All ewes were synchronized by an intravaginal progesterone-releasing device and bred together over a 5-day period. In Experiment 1, of those joined with the ram, more mature ewes ovulated (99% vs 68%; P < 0.05) with a higher ovulation rate (1.82 vs 1.14; P < 0.05) than ewe hoggets. Mature ewes had a higher pregnancy rate (98% vs 47%; P < 0.05) and lower early pregnancy loss (13% vs 41%; P < 0.05) than ewe hoggets. In Experiment 2, the ovulation rate (1.84 vs 1.44; P < 0.05) and pregnancy rate (86% vs 7%; P < 0.05) was higher in mature ewes compared with ewe hoggets. Combined, these studies help to quantify the difference in reproductive performance during breeding and pregnancy between ewe hoggets and mature ewes, and help to direct further research. 
© 2013 The Royal Society of New Zealand.

Thesagro: | CORDEROS; REPRODUCCION ANIMAL.
Categoría del tema: | L53 Fisiología Animal - Reproducción
Registro original: | INIA Las Brujas (LB)
Ejemplares: | LB - (100211-1) - PXI - AP - DD - PP/NZJAR/2013 -  -  - DIS