Fecha/hora: 01/06/2024 06:02:13

Biblioteca(s): 	INIA La Estanzuela; INIA Treinta y Tres.	
Fecha corriente: 	01/08/2022	
Fecha de la última actualización: 	01/09/2022	
Autoria: 	BANCHERO, G.; LÓPEZ-MAZZ, C.; FIERRO, S.; BALDI, F.; LUZARDO, S.; QUINTANS, G.	
Afiliación: 	GEORGGET ELIZABETH BANCHERO HUNZIKER, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; CARLOS LÓPEZ-MAZZ, Faculty of Agronomy, University of the Republic, Av. Garzón 780, Montevideo 12900, Uruguay.; SERGIO FIERRO, Secretariado Uruguayo de la Lana, Montevideo 12100, Uruguay.; FERNANDO BALDI, Facultad de Ciencias Agrarias y Veterinaria, Jaboticabal 14884-900, Brazil.; SANTIAGO FELIPE LUZARDO VILLAR, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; GRACIELA QUINTANS ILARIA, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay.	
Título: 	Refeeding ewes ad libitum after a moderate energy restriction during mid gestation did not affect the onset of breeding and ovulating rate of female offspring.	
Año de publicación: 	2022	
Fuente/Imprenta: 	Animal Reproduction Science, 2022, Volume 244, article 107034. doi: https://doi.org/10.1016/j.anireprosci.2022.107034	
DOI: 	10.1016/j.anireprosci.2022.107034	
Idioma: 	Inglés	
Notas: 	Article history:Received 10 December 2021; Received in revised form 29 June 2022; Accepted 8 July 2022.
Corresponding author:E-mail address: gbanchero@inia.org.	
Contenido: 	Abstract:Sub-nutrition during pregnancy might affect the offspring´s reproductive performance through effects on the development and function of gonads. This study evaluated a maternal energy restriction in ewes from day 48?106 of gestation, on pre- and post-weaning female lambs` performance, onset of female lambs? breeding and ovulation rate during their first breeding season. Adult Polwarth ewes sired by Finnish rams bearing single or twin lambs were assigned to two dietary treatments from day 48 to day 106 of gestation: restricted (R; n = 60) at 60 % of their metabolizable energy (ME) requirements, or non-restricted (NR; n = 54) at 100 % of their ME requirements. After the restriction period, ewes grazed all together ad libitum until weaning. The ewe lambs were evaluated from birth to weaning, as well as during their first breeding season. Although NR ewes weighed 17.7 % more than R ewes (P < 0.05) at the end of the restriction period, the nutritional treatment of the dams had no effect on the weight of the ewe lambs at birth, weaning or final weight (P > 0.05). Fat depth, rib eye area, the percentage of ewe-lambs cycling and their ovulation rate during the first breeding season was not affected by the ewe´s dietary treatment. Ewes restricted at 60 % of their ME requirements in mid-gestation seemed to have the capacity to compensate any detrimental effects on growth and development as well as the reproductive potential of female lambs if adequate refeeding conditions are provided in late gestation, throughout lactation and post-weaning.	
Palabras-Clave: 	FETAL DEVELOPMENT; OVULATION; PUBERTY; SHEEP NUTRITION.	
Categoría del tema: 	L53 Fisiología Animal - Reproducción	
Registro original: 	INIA La Estanzuela (LE)	
Ejemplares: 	LE - (103608-1) - PXI - AP - DD - PP/Animal Reproduction Science/2022 -  -  - DIS
TT - (103930-1) - PXI - AP - DD - PP/Animal-Repr.-Sci/2022/Banchero -  -  - DIS