Fecha/hora: 10/06/2024 21:22:54

Biblioteca(s): 	INIA Las Brujas.	
Fecha corriente: 	03/03/2022	
Fecha de la última actualización: 	03/03/2022	
Autoria: 	CASURIAGA, D.; UNGERFELD, R.; CIAPPESONI, G.; DE MELO, A. F.	
Afiliación: 	DANIELA CASURIAGA, Departamento de Biociencias Veterinarias, Facultad de Veterinaria, Universidad de La República, Ruta 8, km 18, 13000, Montevideo, Urugua; RODOLFO UNGERFELD, Departamento de Biociencias Veterinarias, Facultad de Veterinaria, Universidad de La República, Ruta 8, km 18, 13000, Montevideo, Uruguay; CARLOS GABRIEL CIAPPESONI SCARONE, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; ALINE FREITAS-DE-MELO, Departamento de Biociencias Veterinarias, Facultad de Veterinaria, Universidad de La República, Ruta 8, km 18, 13000, Montevideo, Uruguay.	
Título: 	Lambs are more stressed at early weaning when housed with their twin.	
Año de publicación: 	2022	
Fuente/Imprenta: 	Tropical Animal Health and Production, 2022, volume 54, Article number: 123. doi: https://doi.org/10.1007/s11250-022-03121-x	
ISSN: 	0049-4747 (print); 1573-7438 (electronic)	
DOI: 	10.1007/s11250-022-03121-x	
Idioma: 	Inglés	
Notas: 	Article history: Received 04 October 2021; Accepted 18 February 2022; Published 02 March 2022.	
Contenido: 	ABSTRACT.- The objective of this study was to compare the behavioural and immunological responses of twin lambs housed together with their siblings or not after weaning. The study was performed with seven multiparous Milchschaf ewes and their twin lambs (n = 14), which were weaned abruptly at 63 days of age and assigned to two experimental groups: (1) lambs that were housed together with their sibling after weaning (group GT, n = 6) and (2) lambs that were separated from their siblings and remained with other lambs from the same flock (group GS, n = 8). Before and after weaning, the distance between twins, the number of times in which the sibling was the closest lamb, the lambs’ behaviours, and the average daily gain were recorded. The lambs’ immune response was assessed with the phytohemagglutinin skin test after weaning. The closest lamb before weaning was the sibling in all cases (P < 0.0001 for all). The frequency in which GT lambs were observed closest from its twin increased on the day of weaning (P = 0.002). During the day of weaning, GT lambs vocalised and paced more tan GS lambs (P = 0.001 and P = 0.01, respectively). Twenty-four h after the phytohemagglutinin injection, the skinfold thickness was greater in GS than GT lambs (P = 0.03). In conclusion, twin lambs housed together with their siblings were more stressed at weaning, displaying more intensive behavioural changes and a poorer immunological status than twin lambs housed separated from their siblings.  © 2022 Springer Nature Switzerland AG. Part of Springer Nature.	
Palabras-Clave: 	Bond; Emotional contagion; Sheep; Social buffering; Stress; Welfare.	
Categoría del tema: 	L01 Ganadería	
Registro original: 	INIA Las Brujas (LB)	
Ejemplares: 	LB - (103008-1) - PXI - AP - DD - PP/Trop Anim Health Prod/2022 -  -  - DIS