Fecha/hora: 12/06/2024 04:31:24

Biblioteca(s): 	INIA La Estanzuela.	
Fecha corriente: 	14/06/2019	
Fecha de la última actualización: 	04/11/2019	
Autoria: 	OLIVERA-MUZANTE, J.; FIERRO, S.; ALABART, J.L.; CLARAMUNT, M.; MINTEGUIAGA, M.A.; AUNCHAYNA, G.; ERRANDONEA, N.; BANCHERO, G.	
Afiliación: 	Laboratorio de Reproducción Animal “Dr. Alfredo Ferraris”, Departamento de Ovinos, Lanas y Caprinos, Facultad de Veterinaria, EEMAC, Universidad de la República, Ruta 3 km 363, Paysandú, 60000, Uruguay.; Secretariado Uruguayo de la Lana (S.U.L.), Área de Transferencia de Tecnología, Servando Gómez 2408, Montevideo, 12100, Uruguay.; Unidad de Producción y Sanidad Animal, Centro de Investigación y Tecnología Agroalimentaria de Aragón (CITA), Gobierno de Aragón, Zaragoza, Spain / dInstituto Agroalimentario de Aragón – IA2 (CITA-Universidad), Spain.; Grupo multidisciplinario de ecología para la agricultura, Centro Universitario Regional Este, Universidad de la República, Ruta 8 km 292, Treinta y Tres, Uruguay.; Laboratorio de Reproducción Animal “Dr. Alfredo Ferraris”, Departamento de Salud en los Sistemas Pecuarios, Facultad de Veterinaria, EEMAC, Universidad de la República, Ruta 3 km 363, Paysandú, 60000, Uruguay.; Veterinary Doctor, Liberal Exercise of Profession, Mercedes, Soriano, Uruguay.; Veterinary Doctor, Liberal Exercise of Profession, Tomás Gomensoro, Artigas, Uruguay.; GEORGGET ELIZABETH BANCHERO HUNZIKER, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay.	
Título: 	Short-term dietary protein supplementation improves reproductive performance of estrous-synchronized ewes when there are long intervals of prostaglandin or progesterone-based treatments for timed AI.	
Año de publicación: 	2019	
Fuente/Imprenta: 	Animal Reproduction Science, July 2019, Volume 206, Pages 78-84.	
DOI: 	10.1016/j.anireprosci.2019.05.011	
Idioma: 	Inglés	
Notas: 	Article history: Received 21 November 2018 //Received in revised form 9 May 2019// Accepted23May2019//Available online 25 May 2019.	
Contenido: 	Abstract:To evaluate the reproductive effects of a short-term dietary protein supplementation (Days -10 to -3) before timed AI (TAI = Day 0), 471 Merino ewes grazing native pastures were estrous-synchronized when there were either long intervals between prostaglandin administrations (two prostaglandin injections 15 or 16 d apart; PG15 and PG16, respectively) or with a progesterone-eCG (P4-eCG) protocol, resulting in a 3 × 2 experimental design. Ovulation rate on Day 8 (OR), non-estrous-return to Day 21 (NRR21), and fertility, prolificacy and fecundity on Day 70 were evaluated. The interaction between estrous synchronization protocol and supplementation was not significant for any of these variables (P > 0.05). Supplementation increased OR, prolificacy and fecundity (+0.14, +0.15 and +0.14, respectively, P < 0.01), but did not affect NRR21 or fertility of ewes (+6.2% and +6.7% respectively, P > 0.05). Ewes treated using the PG15 and PG16 protocols had a lesser OR (-0.27), prolificacy (?0.22) and fecundity (?0.20) than ewes treated using P4-eCG protocol (P < 0.01 for each), and similar NRR21 and fertility (?5.4% and ?7.9% respectively, P > 0.05 for both variables), without significant differences between the PG15 and PG16 groups. In conclusion, a short-term dietary protein supplementationbefore TAI improved OR, prolificacy and fecundity of ewes which were estrous-synchronized by imposing long interval PG (15 or 16 d apart) or P4-eCG-based protocols. There was a greater OR, prolificacy and fecundity when there was use of the P4-eCG compared to longinterval PG-based protocols. Estrous-non-return rate after AI and fertility as a result TAI were not affected by either the supplementation or the estrous synchronization protocols used.	
Palabras-Clave: 	EWE; FERTILITY; FOCUS FEEDING; PROGESTERONE; PROSTAGLANDIN; TIMED ARTIFICIAL INSEMINATION.	
Thesagro: 	OVEJAS; REPRODUCCION ANIMAL.	
Categoría del tema: 	L53 Fisiología Animal - Reproducción	
Registro original: 	INIA La Estanzuela (LE)	
Ejemplares: 	LE - (102901-1) - PXI - AP - DD - PP/ANIMAL REPRODUCTION SCIENCE/2019 -  -  - DIS