Efecto de la subnutrición materna periconcepcional sobre los resultados reproductivos de ovejas y la calidad Oocitaria de sus corderas

• J.A. Abecia ^[1] ; F. Forcada ^[1] ; I. Contreras ^[1] ; A. Meikle ^[1] ; C. Sosa ^[1] ; A. Casao ^[1]
  1. [1] Universidad de Zaragoza

     Universidad de Zaragoza

     Zaragoza, 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. 344-346
• Idioma: español
• Títulos paralelos:
  • Effect of maternal periconceptional undernutrition on reproductive performances of ewes and oocyte quality of their ewe lambs
• Enlaces
  • Texto Completo Libro  1 (pdf)   2 (pdf) 
• Resumen

  • Eighty ewes were fed to provide 1.5 (control group, C, n=40) or 0.5 (low group, L, n=40) times their maintenance requirements, from pessary insertion until 7 days after oestrus (day 0). Diets provoked a significant reduction (p<0.05) of live weight (LW) and body condition in the L group. Undernourished ewes presented a significant lower litter size (C: 2.06±0.16; L: 1.59±0.12 lambs per lambing; p<0.05) and fecundity (C: 1.60±0.18; L: 1.07±0.14 lambs per ewe; p<0.05). Lambs from the L group had a significant higher LW at lambing (p<0.05), although no differences in LW at weaning or mean dairy LW gain were observed. Six ewe lambs were euthanized at 2 months of age and their oocyte quality studied. Animals born from L ewes presented more oocytes than from C ewes (140.0±18.5 vs. 60.0±7.8, resp.; p<0.05), although percentages of healthy oocytes were similar. Ewe lambs from L ewes also presented a higher maturation rate (p<0.10) with similar fecundity, cleavage and blastocyst rates. In conclusion, periconceptual maternal undernutrition produced a significant reduction of lamb production. Moreover, lambs from these ewes presented a significant higher LW at lambing and ewe lambs an alteration of oocyte quantity but no quality. These differences could have consequences in the adult life.