Digestibilidad y respuesta ovárica de conejas reproductoras alimentadas con dietas suplementadas con ácidos grasos poliinsaturados n-3

• J.I. Pascual ^[1] ; P.G. Rebollar ^[1] ; E. Aguado ^[1] ; L. Ausín ^[1] ; P. Millán ^[1] ; S. De la Riba ^[1] ; R.M. Garcia Garcia ^[1] ; M. Arias Alvarez ^[1] ; P.L. Lorenzo ^[1]
  1. [1] Universidad Politécnica de Madrid

     Universidad Politécnica de Madrid

     Madrid, España

     
• Localización: XV Jornadas sobre Producción Animal: 14 y 15 de mayo de 2013, Zaragoza / Jorge Hugo Calvo Lacosta (aut.), Isabel Casasús Pueyo (aut.), Margalida Joy Torrens (aut.), Javier Álvarez Rodríguez (aut.), Luis Varona Aguado (aut.), Begoña Panea Doblado (aut.), Carlos Calvete Margolles (aut.), Joaquim Barcells Teres (aut.), Vol. 1, 2013, ISBN 978-84-695-7684-7, págs. 195-197
• Idioma: español
• Títulos paralelos:
  • Digestibility and ovarian response of rabbit does fed supplemented diets with polyunsaturated fatty acids n-3
• Enlaces
  • Texto Completo Libro  1 (pdf)   2 (pdf) 
• Resumen

  • Twenty rabbit does were fed ad libitum two isofibrous, isoenergetic and isoproteic diets (n=10) supplemented with two different fat sources: 0.75% lard for diet C (control) or 1.5% of a supplement (Optomega-50; Optivite International Ltd., España) containing a 50% of EE and 38% of n-3 polyunsaturated fatty acids for diet P (PUFA n-3). From 10 to 16 weeks of age does feed intake was determined and apparent digestibility of nutrients at 12 weeks of age, ovulation rate and plasma progesterone concentrations at 0, 60 min, 5, 7 and 9 days post-induction after administration of 20 μg of Gonadorelina (Inducel-GnRH, Lab. Ovejero) at 16 weeks of age were assessed. Average daily intake (150.5 g/d), apparent digestibility of DM (60.7±0.53%), NDF (30.2±0.60%), CP (65.2±1.01%) and digestible energy (2391±18.2 Kcal/Kg), ovulation rate (95%), and number of corpora lutea (9.8±0.7) were similar between dietary treatments. Plasma progesterone concentrations increased at 60 minutes (7.13±1.9 ng/ml) and 5 days (13.3±1.9 ng/ml) after induction with respect to day 0 (0.7±1.9 ng/ml; P<0.05), remaining constant afterward in both groups (19.4±1.9 ng/ml). However, plasma progesterone of does fed diet P tended to be higher than for diet C on day 5 and 7 postinduction (16.6±1.9 vs.12.6±1.8 and 19.0±1.8 vs. 15.5±2.1 ng/ml, P=0.068 and P=0.082; respectively). Therefore, PUFA n-3 supplementation of does rabbit diets might be related with high progesterone levels and reduced early embryo mortality. More research is needed to determine if prolificacy of does rabbit could be improved by feeding n-3 PUFA enriched diets.