Salt-regulated prepartum supplementation and parity effects on maternal performance, wool growth, and lamb development in Merino ewes grazing in semi-arid steppes

Autores: Cueto, Marcela Isabel; Fernandez, Jimena; Bruno Galarraga, María Macarena; Gibbons, Alejandro Eduardo; Riquelme, Maximiliano; Castillo, Daniel Alejandro; Tesan, Micaela; Schaap, Bárbara; Villar, Maria Laura; Villagra, Edgar Sebastian
Año de publicación: 2025
Idioma: inglés
Tipo de recurso: artículo
Estado: versión publicada
Descripción: The impact of prepartum supplementation using a balanced diet incorporating salt as an intake regulator was assessed on maternal live weight, body condition, wool production, maternal and lamb behavior, and lamb growth up to 50 days of age in multiparous and primiparous Merino ewes under extensive grazing. On day −65 prepartum (Day 0 = Partum), 80 pregnant Merino ewes carrying a single fetus (40 multiparous; 40 primiparous) from fixed-timed artificial insemination, were randomly assigned to one of two dietary treatments, each with one repetition: grazing only (Control group) or grazing plus ad libitum supplementation with a balanced food containing salt as an intake regulator (Suppl group) for 60 days (Days −65 to −5 prepartum). Behavioral and performance variables were monitored in ewes and lambs from −65 days prepartum until 50 days postpartum. Blood metabolites (glucose, total proteins, and urea) were assessed in ewes during the same period. On day −35 prepartum, ewes were subjected to shearing. From day −50 prepartum until 30 days postpartum, ewe BW was significantly higher in the Suppl multiparous group compared to the other groups (P < 0.05). A marginal increase of 220 g in greasy fleece weight was observed in Suppl ewes after 30 days of supplementation (P < 0.1). However, no significant effects were observed in maternal or lamb behavior, lamb birthweight or lamb survival (P > 0.05). A marginal increase in lamb weight on days 30 and 50 postpartum was observed in the Suppl group compared to the Control group (P < 0.1). An increase in total proteins and urea was observed on day −5 prepartum in the Suppl group compared to the Control group (P < 0.05). Lambs from primiparous ewes took longer to suck compared with lambs from multiparous ewes (P < 0.05). Also, lamb birthweight, lamb weight on days 30 and 50 postpartum were significantly higher in lambs from multiparous ewes compared to lambs from primiparous ewes (P < 0.05). Neonatal mortality was higher in primiparous than in multiparous ewes, with survival rates of 65 % and 91 %, respectively (P < 0.05). In conclusion, Suppl primiparous ewes evidenced an improved maternal body status during the peripartum period. Prepartum supplementation showed a marginal increase in greasy fleece weight. However, no significant effects were observed on maternal behavior, lamb survival or lamb growth. Primiparous ewes exhibited a 26 % higher neonatal mortality than multiparous ewes, likely attributable to their inexperienced maternal behavior.
EEA Bariloche
Fil: Cueto, Marcela Isabel. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; Argentina
Fil: Cueto, Marcela Isabel. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; Argentina
Fil: Fernandez, Jimena. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; Argentina
Fil: Fernandez, Jimena. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; Argentina
Fil: Bruno Galarraga, María Macarena. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; Argentina
Fil: Bruno Galarraga, María Macarena. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; Argentina
Fil: Gibbons, Alejandro Eduardo. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; Argentina
Fil: Gibbons, Alejandro Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; Argentina
Fil: Riquelme, Maximiliano. Actividad privada; Argentina
Fil: Castillo, Daniel Alejandro. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; Argentina
Fil: Castillo, Daniel Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; Argentina
Fil: Tesan, Micaela. Universidad Nacional de Rio Negro. Facultad de Ciencias Veterinarias; Argentina
Fil: Schaap, Bárbara. Universidad Nacional de Rio Negro. Facultad de Ciencias Veterinarias; Argentina
Fil: Villar, Maria Laura. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; Argentina
Fil: Villar, Maria Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; Argentina
Fil: Villagra, Edgar Sebastian. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; Argentina
Fil: Villagra, Edgar Sebastian. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; Argentina
Fil: Villagra, Edgar Sebastian. Universidad Nacional de Río Negro. Cátedras de Rumiantes Menores y Sistemas de Producción Bovina en Ecosistemas Frágiles; Argentina
Fuente: Animal Feed Science and Technology 320 : 116223. (February 2025)
Materia: Cordero
Oveja
Suplementos Alimentarios
Pastoreo
Zona Semiárida
Estepas
Sal
Período Perinatal
Lambs
Ewes
Food Supplements
Grazing
Semiarid Zones
Steppes
Salts
Perinatal Period
Raza Merino
Nivel de accesibilidad: acceso restringido
Condiciones de uso: http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
Institución: Instituto Nacional de Tecnología Agropecuaria
OAI Identificador: oai:localhost:20.500.12123/21553

Acceder

id	INTADig_1c58679faf8680eb03692d7f1aedbbcc
oai_identifier_str	oai:localhost:20.500.12123/21553
network_acronym_str	INTADig
repository_id_str	l
network_name_str	INTA Digital (INTA)
spelling	Salt-regulated prepartum supplementation and parity effects on maternal performance, wool growth, and lamb development in Merino ewes grazing in semi-arid steppesCueto, Marcela IsabelFernandez, JimenaBruno Galarraga, María MacarenaGibbons, Alejandro EduardoRiquelme, MaximilianoCastillo, Daniel AlejandroTesan, MicaelaSchaap, BárbaraVillar, Maria LauraVillagra, Edgar SebastianCorderoOvejaSuplementos AlimentariosPastoreoZona SemiáridaEstepasSalPeríodo PerinatalLambsEwesFood SupplementsGrazingSemiarid ZonesSteppesSaltsPerinatal PeriodRaza MerinoThe impact of prepartum supplementation using a balanced diet incorporating salt as an intake regulator was assessed on maternal live weight, body condition, wool production, maternal and lamb behavior, and lamb growth up to 50 days of age in multiparous and primiparous Merino ewes under extensive grazing. On day −65 prepartum (Day 0 = Partum), 80 pregnant Merino ewes carrying a single fetus (40 multiparous; 40 primiparous) from fixed-timed artificial insemination, were randomly assigned to one of two dietary treatments, each with one repetition: grazing only (Control group) or grazing plus ad libitum supplementation with a balanced food containing salt as an intake regulator (Suppl group) for 60 days (Days −65 to −5 prepartum). Behavioral and performance variables were monitored in ewes and lambs from −65 days prepartum until 50 days postpartum. Blood metabolites (glucose, total proteins, and urea) were assessed in ewes during the same period. On day −35 prepartum, ewes were subjected to shearing. From day −50 prepartum until 30 days postpartum, ewe BW was significantly higher in the Suppl multiparous group compared to the other groups (P < 0.05). A marginal increase of 220 g in greasy fleece weight was observed in Suppl ewes after 30 days of supplementation (P < 0.1). However, no significant effects were observed in maternal or lamb behavior, lamb birthweight or lamb survival (P > 0.05). A marginal increase in lamb weight on days 30 and 50 postpartum was observed in the Suppl group compared to the Control group (P < 0.1). An increase in total proteins and urea was observed on day −5 prepartum in the Suppl group compared to the Control group (P < 0.05). Lambs from primiparous ewes took longer to suck compared with lambs from multiparous ewes (P < 0.05). Also, lamb birthweight, lamb weight on days 30 and 50 postpartum were significantly higher in lambs from multiparous ewes compared to lambs from primiparous ewes (P < 0.05). Neonatal mortality was higher in primiparous than in multiparous ewes, with survival rates of 65 % and 91 %, respectively (P < 0.05). In conclusion, Suppl primiparous ewes evidenced an improved maternal body status during the peripartum period. Prepartum supplementation showed a marginal increase in greasy fleece weight. However, no significant effects were observed on maternal behavior, lamb survival or lamb growth. Primiparous ewes exhibited a 26 % higher neonatal mortality than multiparous ewes, likely attributable to their inexperienced maternal behavior.EEA BarilocheFil: Cueto, Marcela Isabel. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; ArgentinaFil: Cueto, Marcela Isabel. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; ArgentinaFil: Fernandez, Jimena. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; ArgentinaFil: Fernandez, Jimena. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; ArgentinaFil: Bruno Galarraga, María Macarena. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; ArgentinaFil: Bruno Galarraga, María Macarena. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; ArgentinaFil: Gibbons, Alejandro Eduardo. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; ArgentinaFil: Gibbons, Alejandro Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; ArgentinaFil: Riquelme, Maximiliano. Actividad privada; ArgentinaFil: Castillo, Daniel Alejandro. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; ArgentinaFil: Castillo, Daniel Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; ArgentinaFil: Tesan, Micaela. Universidad Nacional de Rio Negro. Facultad de Ciencias Veterinarias; ArgentinaFil: Schaap, Bárbara. Universidad Nacional de Rio Negro. Facultad de Ciencias Veterinarias; ArgentinaFil: Villar, Maria Laura. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; ArgentinaFil: Villar, Maria Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; ArgentinaFil: Villagra, Edgar Sebastian. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; ArgentinaFil: Villagra, Edgar Sebastian. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; ArgentinaFil: Villagra, Edgar Sebastian. Universidad Nacional de Río Negro. Cátedras de Rumiantes Menores y Sistemas de Producción Bovina en Ecosistemas Frágiles; ArgentinaElsevier2025-03-06T11:50:57Z2025-03-06T11:50:57Z2025-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://hdl.handle.net/20.500.12123/21553https://www.sciencedirect.com/science/article/abs/pii/S03778401250001850377-84011873-2216https://doi.org/10.1016/j.anifeedsci.2025.116223Animal Feed Science and Technology 320 : 116223. (February 2025)reponame:INTA Digital (INTA)instname:Instituto Nacional de Tecnología Agropecuariaenginfo:eu-repograntAgreement/INTA/2019-PD-E5-I107-001, Biotecnologías de la reproducción: mejora de la eficiencia reproductiva en especies de interés zootécnicoinfo:eu-repo/semantics/restrictedAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)2025-09-29T13:47:10Zoai:localhost:20.500.12123/21553instacron:INTAInstitucionalhttp://repositorio.inta.gob.ar/Organismo científico-tecnológicoNo correspondehttp://repositorio.inta.gob.ar/oai/requesttripaldi.nicolas@inta.gob.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:l2025-09-29 13:47:11.322INTA Digital (INTA) - Instituto Nacional de Tecnología Agropecuariafalse
dc.title.none.fl_str_mv	Salt-regulated prepartum supplementation and parity effects on maternal performance, wool growth, and lamb development in Merino ewes grazing in semi-arid steppes
title	Salt-regulated prepartum supplementation and parity effects on maternal performance, wool growth, and lamb development in Merino ewes grazing in semi-arid steppes
spellingShingle	Salt-regulated prepartum supplementation and parity effects on maternal performance, wool growth, and lamb development in Merino ewes grazing in semi-arid steppes Cueto, Marcela Isabel Cordero Oveja Suplementos Alimentarios Pastoreo Zona Semiárida Estepas Sal Período Perinatal Lambs Ewes Food Supplements Grazing Semiarid Zones Steppes Salts Perinatal Period Raza Merino
title_short	Salt-regulated prepartum supplementation and parity effects on maternal performance, wool growth, and lamb development in Merino ewes grazing in semi-arid steppes
title_full	Salt-regulated prepartum supplementation and parity effects on maternal performance, wool growth, and lamb development in Merino ewes grazing in semi-arid steppes
title_fullStr	Salt-regulated prepartum supplementation and parity effects on maternal performance, wool growth, and lamb development in Merino ewes grazing in semi-arid steppes
title_full_unstemmed	Salt-regulated prepartum supplementation and parity effects on maternal performance, wool growth, and lamb development in Merino ewes grazing in semi-arid steppes
title_sort	Salt-regulated prepartum supplementation and parity effects on maternal performance, wool growth, and lamb development in Merino ewes grazing in semi-arid steppes
dc.creator.none.fl_str_mv	Cueto, Marcela Isabel Fernandez, Jimena Bruno Galarraga, María Macarena Gibbons, Alejandro Eduardo Riquelme, Maximiliano Castillo, Daniel Alejandro Tesan, Micaela Schaap, Bárbara Villar, Maria Laura Villagra, Edgar Sebastian
author	Cueto, Marcela Isabel
author_facet	Cueto, Marcela Isabel Fernandez, Jimena Bruno Galarraga, María Macarena Gibbons, Alejandro Eduardo Riquelme, Maximiliano Castillo, Daniel Alejandro Tesan, Micaela Schaap, Bárbara Villar, Maria Laura Villagra, Edgar Sebastian
author_role	author
author2	Fernandez, Jimena Bruno Galarraga, María Macarena Gibbons, Alejandro Eduardo Riquelme, Maximiliano Castillo, Daniel Alejandro Tesan, Micaela Schaap, Bárbara Villar, Maria Laura Villagra, Edgar Sebastian
author2_role	author author author author author author author author author
dc.subject.none.fl_str_mv	Cordero Oveja Suplementos Alimentarios Pastoreo Zona Semiárida Estepas Sal Período Perinatal Lambs Ewes Food Supplements Grazing Semiarid Zones Steppes Salts Perinatal Period Raza Merino
topic	Cordero Oveja Suplementos Alimentarios Pastoreo Zona Semiárida Estepas Sal Período Perinatal Lambs Ewes Food Supplements Grazing Semiarid Zones Steppes Salts Perinatal Period Raza Merino
dc.description.none.fl_txt_mv	The impact of prepartum supplementation using a balanced diet incorporating salt as an intake regulator was assessed on maternal live weight, body condition, wool production, maternal and lamb behavior, and lamb growth up to 50 days of age in multiparous and primiparous Merino ewes under extensive grazing. On day −65 prepartum (Day 0 = Partum), 80 pregnant Merino ewes carrying a single fetus (40 multiparous; 40 primiparous) from fixed-timed artificial insemination, were randomly assigned to one of two dietary treatments, each with one repetition: grazing only (Control group) or grazing plus ad libitum supplementation with a balanced food containing salt as an intake regulator (Suppl group) for 60 days (Days −65 to −5 prepartum). Behavioral and performance variables were monitored in ewes and lambs from −65 days prepartum until 50 days postpartum. Blood metabolites (glucose, total proteins, and urea) were assessed in ewes during the same period. On day −35 prepartum, ewes were subjected to shearing. From day −50 prepartum until 30 days postpartum, ewe BW was significantly higher in the Suppl multiparous group compared to the other groups (P < 0.05). A marginal increase of 220 g in greasy fleece weight was observed in Suppl ewes after 30 days of supplementation (P < 0.1). However, no significant effects were observed in maternal or lamb behavior, lamb birthweight or lamb survival (P > 0.05). A marginal increase in lamb weight on days 30 and 50 postpartum was observed in the Suppl group compared to the Control group (P < 0.1). An increase in total proteins and urea was observed on day −5 prepartum in the Suppl group compared to the Control group (P < 0.05). Lambs from primiparous ewes took longer to suck compared with lambs from multiparous ewes (P < 0.05). Also, lamb birthweight, lamb weight on days 30 and 50 postpartum were significantly higher in lambs from multiparous ewes compared to lambs from primiparous ewes (P < 0.05). Neonatal mortality was higher in primiparous than in multiparous ewes, with survival rates of 65 % and 91 %, respectively (P < 0.05). In conclusion, Suppl primiparous ewes evidenced an improved maternal body status during the peripartum period. Prepartum supplementation showed a marginal increase in greasy fleece weight. However, no significant effects were observed on maternal behavior, lamb survival or lamb growth. Primiparous ewes exhibited a 26 % higher neonatal mortality than multiparous ewes, likely attributable to their inexperienced maternal behavior. EEA Bariloche Fil: Cueto, Marcela Isabel. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; Argentina Fil: Cueto, Marcela Isabel. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; Argentina Fil: Fernandez, Jimena. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; Argentina Fil: Fernandez, Jimena. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; Argentina Fil: Bruno Galarraga, María Macarena. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; Argentina Fil: Bruno Galarraga, María Macarena. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; Argentina Fil: Gibbons, Alejandro Eduardo. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; Argentina Fil: Gibbons, Alejandro Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; Argentina Fil: Riquelme, Maximiliano. Actividad privada; Argentina Fil: Castillo, Daniel Alejandro. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; Argentina Fil: Castillo, Daniel Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; Argentina Fil: Tesan, Micaela. Universidad Nacional de Rio Negro. Facultad de Ciencias Veterinarias; Argentina Fil: Schaap, Bárbara. Universidad Nacional de Rio Negro. Facultad de Ciencias Veterinarias; Argentina Fil: Villar, Maria Laura. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; Argentina Fil: Villar, Maria Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; Argentina Fil: Villagra, Edgar Sebastian. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; Argentina Fil: Villagra, Edgar Sebastian. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; Argentina Fil: Villagra, Edgar Sebastian. Universidad Nacional de Río Negro. Cátedras de Rumiantes Menores y Sistemas de Producción Bovina en Ecosistemas Frágiles; Argentina
description	The impact of prepartum supplementation using a balanced diet incorporating salt as an intake regulator was assessed on maternal live weight, body condition, wool production, maternal and lamb behavior, and lamb growth up to 50 days of age in multiparous and primiparous Merino ewes under extensive grazing. On day −65 prepartum (Day 0 = Partum), 80 pregnant Merino ewes carrying a single fetus (40 multiparous; 40 primiparous) from fixed-timed artificial insemination, were randomly assigned to one of two dietary treatments, each with one repetition: grazing only (Control group) or grazing plus ad libitum supplementation with a balanced food containing salt as an intake regulator (Suppl group) for 60 days (Days −65 to −5 prepartum). Behavioral and performance variables were monitored in ewes and lambs from −65 days prepartum until 50 days postpartum. Blood metabolites (glucose, total proteins, and urea) were assessed in ewes during the same period. On day −35 prepartum, ewes were subjected to shearing. From day −50 prepartum until 30 days postpartum, ewe BW was significantly higher in the Suppl multiparous group compared to the other groups (P < 0.05). A marginal increase of 220 g in greasy fleece weight was observed in Suppl ewes after 30 days of supplementation (P < 0.1). However, no significant effects were observed in maternal or lamb behavior, lamb birthweight or lamb survival (P > 0.05). A marginal increase in lamb weight on days 30 and 50 postpartum was observed in the Suppl group compared to the Control group (P < 0.1). An increase in total proteins and urea was observed on day −5 prepartum in the Suppl group compared to the Control group (P < 0.05). Lambs from primiparous ewes took longer to suck compared with lambs from multiparous ewes (P < 0.05). Also, lamb birthweight, lamb weight on days 30 and 50 postpartum were significantly higher in lambs from multiparous ewes compared to lambs from primiparous ewes (P < 0.05). Neonatal mortality was higher in primiparous than in multiparous ewes, with survival rates of 65 % and 91 %, respectively (P < 0.05). In conclusion, Suppl primiparous ewes evidenced an improved maternal body status during the peripartum period. Prepartum supplementation showed a marginal increase in greasy fleece weight. However, no significant effects were observed on maternal behavior, lamb survival or lamb growth. Primiparous ewes exhibited a 26 % higher neonatal mortality than multiparous ewes, likely attributable to their inexperienced maternal behavior.
publishDate	2025
dc.date.none.fl_str_mv	2025-03-06T11:50:57Z 2025-03-06T11:50:57Z 2025-02
dc.type.none.fl_str_mv	info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo
format	article
status_str	publishedVersion
dc.identifier.none.fl_str_mv	http://hdl.handle.net/20.500.12123/21553 https://www.sciencedirect.com/science/article/abs/pii/S0377840125000185 0377-8401 1873-2216 https://doi.org/10.1016/j.anifeedsci.2025.116223
url	http://hdl.handle.net/20.500.12123/21553 https://www.sciencedirect.com/science/article/abs/pii/S0377840125000185 https://doi.org/10.1016/j.anifeedsci.2025.116223
identifier_str_mv	0377-8401 1873-2216
dc.language.none.fl_str_mv	eng
language	eng
dc.relation.none.fl_str_mv	info:eu-repograntAgreement/INTA/2019-PD-E5-I107-001, Biotecnologías de la reproducción: mejora de la eficiencia reproductiva en especies de interés zootécnico
dc.rights.none.fl_str_mv	info:eu-repo/semantics/restrictedAccess http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv	restrictedAccess
rights_invalid_str_mv	http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv	application/pdf
dc.publisher.none.fl_str_mv	Elsevier
publisher.none.fl_str_mv	Elsevier
dc.source.none.fl_str_mv	Animal Feed Science and Technology 320 : 116223. (February 2025) reponame:INTA Digital (INTA) instname:Instituto Nacional de Tecnología Agropecuaria
reponame_str	INTA Digital (INTA)
collection	INTA Digital (INTA)
instname_str	Instituto Nacional de Tecnología Agropecuaria
repository.name.fl_str_mv	INTA Digital (INTA) - Instituto Nacional de Tecnología Agropecuaria
repository.mail.fl_str_mv	tripaldi.nicolas@inta.gob.ar
_version_	1844619201345486848
score	12.558318

Salt-regulated prepartum supplementation and parity effects on maternal performance, wool growth, and lamb development in Merino ewes grazing in semi-arid steppes

Publicaciones similares