Fecha/hora: 07/06/2024 14:49:11

Biblioteca(s): 	INIA Las Brujas.	
Fecha corriente: 	30/06/2023	
Fecha de la última actualización: 	30/06/2023	
Autoria: 	REGUEIRO, M.; JORGE-SMEDING, E.; BALDI, F.; IDIARTE BORDA, A.; LÓPEZ-MAZZ, C.; BANCHERO, G.	
Afiliación: 	MARIEL REGUEIRO, Faculty of Agronomy, UDELAR, Av. Garzón 780, 12900, Uruguay; EZEQUIEL JORGE-SMEDING, Faculty of Agronomy, UDELAR, Av. Garzón 780, 12900, Uruguay; FERNANDO BALDI, School of Agricultural Sciences and Veterinary, Sao Pablo 11884100, Brazil; AGUSTINA IDIARTE BORDA, Faculty of Agronomy, UDELAR, Av. Garzón 780, 12900, Uruguay; CARLOS LÓPEZ-MAZZ, Faculty of Agronomy, UDELAR, Av. Garzón 780, 12900, Uruguay; GEORGGET ELIZABETH BANCHERO HUNZIKER, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay.	
Título: 	Programmed parturition assistance (PPA) in primiparous wool-type ewes improves mother-lamb behaviour at lambing.	
Año de publicación: 	2023	
Fuente/Imprenta: 	Applied Animal Behaviour Science. August 2023, Vol. 265, 105980. https://doi.org/10.1016/j.applanim.2023.105980	
ISSN: 	0168-1591 (print); 1872-9045 (electronic).	
DOI: 	10.1016/j.applanim.2023.105980	
Idioma: 	Inglés	
Notas: 	Article history: Received 6 January 2023; Received in revised form 6 May 2023; Accepted 4 June 2023; Available online 7 June 2023. -- Corresponding author:  E-mail address: mariel@fagro.edu.uy (M. Regueiro). --	
Contenido: 	The effect of programmed assistance at parturition on the behaviour of the mother and its offspring in primiparous ewes under extensive rearing was evaluated. Programmed parturition assistance was defined as the manoeuvres performed immediately after the beginning of the expulsion phase to shorten it. Twenty-eight 2-year-old Corriedale primiparous ewes (body condition score (BCS): 3.4 ± 0.1; body weight (BW): 35.5 ± 0.7 kg) with a single foetus were used. Before lambing and considering BW, BCS and sire, the ewes were randomly assigned to (i) Programmed-parturition-assisted (PPA; n = 14): ewes whose lambing was programmed to be assisted or (ii) Not-assisted (NA; n = 14): ewes that were not assisted and their lambs were born through natural labour. The duration of the foetus expulsion phase, maternal behaviour score (MBS, 1-5), onset of grooming, lamb/ewe BW ratio and lamb desertion were determined in the ewes. Birth weight, Apgar test (score 0-10), O2 saturation, meconium-stained coat, latency to first bleat, success to stand and suck, were registered in the lambs. PPA ewes registered shorter duration of labour (19.2 ± 4.2 vs. 42.6 ± 7.8 min), earlier onset of grooming (1.2 ± 0.4 vs. 3.0 ± 0.6 min), higher MBS (4.5 ± 0.1 vs. 3.1 ± 0.4) and did not desert any lamb during the first 72 h from birth. The lambs born to PPA mothers registered higher O2 saturation (97.6 ± 1.0 % vs. 93.4 ± 1.3 %), bleated earlier (2.4 ± 0.5 vs. 4.6 ± 0.8 min), stood up earlier (24.1 ± 4.2 vs. 36.8 ± 8.0 min) and recorded shorter time to suck (36.5 ± 6.7 vs. 71.0 ± 12.9 min). No effect of treatment on Apgar test or meconium-stained coat was observed, but regardless of treatment, meconium-stained lambs had a higher lamb/ewe BW ratio than unstained ones. The reduction of the duration of foetal expulsion phase, through programmed parturition assistance, positively affected the vigour of the lambs as well as the maternal behaviour of primiparous ewes, which in turn would increase the chances of lamb survival and ultimately, improve the welfare of the ewe-lamb unit. © 2023 Elsevier B.V. All rights reserved.	
Palabras-Clave: 	Birth asphyxia; Delivery assistance; Ewe; Lamb; Maternal behaviour.	
Categoría del tema: 	L10 Genética y mejoramiento animal	
Registro original: 	INIA Las Brujas (LB)	
Ejemplares: 	LB - (103562-1) - PXI - AP - DD - Applied Animal Behaviour Science/2023 -  -  - DIS