Fecha/hora: 16/06/2024 09:06:41

Biblioteca(s): 	INIA Las Brujas.	
Fecha corriente: 	21/02/2014	
Fecha de la última actualización: 	06/12/2018	
Autoria: 	BAYEMI, P. H.; LEINYUY, I.; NSONGKA, M. V.; WEBB, E. C.; NCHADJI, J. M.; CAVESTANY, D.; PERERA, B. M. A. O.	
Afiliación: 	POUGUE HENRI BAYEMI, Institute of Agricultural Research for Development Bambui, Cameroon; ISABELLE LEINYUY, Institute of Agricultural Research for Development Bambui, Cameroon; MUNJI VICTORINE NSONGKA, Institute of Agricultural Research for Development Bambui, Cameroon; EDWARD COTTINGTON WEBB, Department of Animal and Wildlife Science, University of Pretoria, South Africa; JUSTIN MBANYA NCHADJI, Institute of Agricultural Research for Development Bambui, Cameroon; DANIEL CAVESTANY BOCKING, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; BMA OSWIN PERERA, University of Peradeniya, Sri Lanka.	
Título: 	Effect of cow parity and synchronization method with PGF2&#945; on conception rates of Bos indicus cows in Cameroon.	
Año de publicación: 	2015	
Fuente/Imprenta: 	Tropical Animal Health and Production, January 2015, vol. 47, Issue 1, pages 159-162.	
ISSN: 	0049-4747 // Online ISSN 1573-7438	
DOI: 	10.1007/s11250-014-0701-7	
Idioma: 	Inglés	
Notas: 	Article history: Received 31 August 2014 // Accepted 01 October 2014 // First Online 16 October 2014.	
Contenido: 	ABSTRACT.
The objective of this work was to evaluate the effect of two synchronization methods with prostaglandins F2&#945; (PGF2&#945;) on heifers and multiparous cows. Fourty-three Bos indicus cows (white and Red Fulani) were divided into four groups in a two-by-two factorial structure, parity x method of synchronization. The synchronization methods consisted of a two-dose regime which involved injection of animals on day 0 with PGF2&#945; (Lutalyse) at 5 ml per cow intramuscularly. On day 11, the injection was repeated at the same dosage. On day 14 (72 h after the second injection), a fixed-time artificial insemination (AI) was done. On day 15 (96 h after the second injection), a second insemination was done. The one-and-a-half-dose regime consisted of an injection similar to the first treatment mentioned above on day 0. Thereafter, cows were observed for heat, and anyone showing heat was inseminated. A second dose was given on day 11 to all animals not having shown any heat. A fixed-time AI was done on days 14 and 15. Blood samples were collected on the day 0 of insemination for each cow while day 11 and day 21 after insemination. Progesterone was analysed by means of standard ELISA progesterone kits to determine its profiles after insemination. Results show no evidence of the effect of treatments on conception rates (P&#8201;>&#8201;0.05). Similarly, heifers and multiparous cows had similar conception rates (P&#8201;>&#8201;0.05). Between 3 weeks and 3 months of pregnancy, there was a loss of embryos of 28 % in heifers and 20 % in multiparous cows, but the difference between the two groups was not significant (P&#8201;>&#8201;0.05). It recommended that farmers do not synchronize animals with poor body condition score (BCS). They should also monitor weight gains of heifers, remove them from the herd when they have been mixed with young growing bulls and put them in a breeding herd. The two-dose regime is better to be used in areas where the inseminator cannot easily be available.
© Springer Science+Business Media Dordrecht 2014	
Palabras-Clave: 	CAMEROON; CATTLE; OESTRUS; PROGESTERONE; SYNCHRONIZATION.	
Categoría del tema: 	--	
Registro original: 	INIA Las Brujas (LB)	
Ejemplares: 	LB - (5716-1) - PXI - AP - DD - PP/Trop Anim Health Prod/2015 -  -  - DIS