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The authors thank to Dr. Jorge Gil, Martin Hitateguy and Luis Albarenga for the help with the field work and processing of records. We acknowledge to 'El Recuerdo' farm (Errandonea-Ltipez family) for their support with animals and resources. This research was supported by the Laboratory of Animal Reproduction Dr. Alfredo Ferraris and Faculty of Veterinary, Universidad de la Republica. Paysandu, Uruguay.

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Alabart, J. L. - Autor o Coautor
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Publicaciones > Artículo

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

Publicado en:Animal Reproduction Science. 206 78-84 - 2019-07-01 206(), doi: 10.1016/j.anireprosci.2019.05.011

Alabart, J. L.;

Afiliaciones

Centro de Investigación y Tecnología Agroalimentaria de Aragón - Entidad de origen
Faculty of Veterinary, Universidad de la Republica. Paysandu, Uruguay - Financiador
Gobierno Aragon, Ctr Invest & Tecnol Agroalimentaria Aragon CITA, Unidad Prod & Sanidad Anim, Av Montanana 930, Zaragoza 50059, Spain - Autor o Coautor
Grupo multidisciplinario de ecología para la agricultura, Centro Universitario Regional Este, Universidad de la República, Ruta 8 km 292, Treinta y Tres, Uruguay. Electronic address: martinclaramunt@gmail.com. - Autor o Coautor
INIA, Programa Nacl Carne & Lana, Ruta 50 Km 12, Colonia, Uruguay - Autor o Coautor
Instituto Agroalimentario de Aragón - IA2 (CITA-Universidad de Zaragoza), Calle Miguel Servet 177, 50013, Zaragoza, Spain. Electronic address: jlalabart@aragon.es. - Autor o Coautor
Instituto Nacional de Investigación Agropecuaria (INIA), Programa Nacional de Carne y Lana, Ruta 50 km 12, Colonia, Uruguay. Electronic address: gbanchero@inia.org.uy. - Autor o Coautor
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, 60000, Paysandú, Uruguay. Electronic address: joliveramuz@gmail.com. - Autor o Coautor
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, 60000, Paysandú, Uruguay. Electronic address: maurominteguiga@gmail.com. - Autor o Coautor
Laboratory of Animal Reproduction "Dr. Alfredo Ferraris", Universidad de la Republica. Paysandu, Uruguay - Financiador
Secretariado Uruguayo de la Lana (S.U.L.), Área de Transferencia de Tecnología, Servando Gómez 2408, 12100, Montevideo, Uruguay. Electronic address: sfierro33@gmail.com. - Autor o Coautor
SUL, Area Transferencia Tecnol, Servando Gomez 2408, Montevideo 12100, Uruguay - Autor o Coautor
Unidad de Producción y Sanidad Animal, Centro de Investigación y Tecnología Agroalimentaria de Aragón (CITA), Gobierno de Aragón, Av. Montañana 930, 50059, Zaragoza, Spain - Autor o Coautor
Univ Republ, Ctr Univ Reg Este, Grp Multidisciplinario Ecol Agr, Ruta 8 Km 292, Treinta Y Tres, Uruguay - Autor o Coautor
Univ Republ, Fac Vet, Dept Salad Sistemas Pecuarios, Lab Reprod Anim Dr Alfredo Ferraris,EEMAC, Ruta 3 Km 363, Paysandu 60000, Uruguay - Autor o Coautor
Univ Republ, Lab Reprod Anim Dr Alfredo Ferraris, Dept Ovinos Lanas & Caprinos, Fac Vet,EEMAC, Ruta 3 Km 363, Paysandu 60000, Uruguay - Autor o Coautor
Univ Zaragoza, CITA, Inst Agroalimentario Aragon IA2, Calle Miguel Servet 177, E-50013 Zaragoza, Spain - Autor o Coautor
Veterinary Doctor, Liberal Exercise of Profession, Mercedes, Soriano, Uruguay. Electronic address: aunchaynagustavo@gmail.com. - Autor o Coautor
Veterinary Doctor, Liberal Exercise of Profession, Tomás Gomensoro, Artigas, Uruguay. Electronic address: errandonea.n@gmail.com. - Autor o Coautor
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Resúmen

Resúmen: 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 x 2 experimental design. Ovulation rate on Day 8 (OR), non-estrous-retum 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 supplementation before 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 long interval 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; Artificial-insemination; Estrus; Ewe; Fertility; Focus feeding; Growth; Ovarian follicular dynamics; Ovulation rate; Pregnancy rate; Progestagens; Progesterone; Prolificacy; Prostaglandin; Protocols; Sheep; Timed artificial insemination

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WoS Scopus by Scimago
Best Categ.Reproductive BiologyAnimal Science and Zoology
WoSScopus by ScimagoSPIFecytAgaurDialnetCircCapesMiar
IF1.6600.660--11.000
Rank26/2994/380
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DD4D3-
TT2T1
PP12P25
Index ERIC-
Index Emergin-
Index AHCI-