Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
Effects of a lignin-rich fibre diets on productive, reproductive and endocrine parameters in nulliparous rabbit does
Year:2009
Research Areas
  • Animal production
Information
Abstract
In rabbits, modifications in dietary composition may be associated with reproductive benefits. However, the influence of nutrition on ovarian function and embryo development is poorly known in this species. The goal of this workwas to study the short-term effects of feeding highfibre diets with different levels of lignin during the rearing period on productive, endocrine and reproductive parameters of nulliparous rabbit does. A total of 95 New Zealand×California 11- week-old nulliparous white rabbits were randomly allocated in two experimental groups fed ad libitum fibre-rich diets with a high lignin content (HL group: NDF 49.6% of DM, LAD 15.8% of DM; n=48) or a standard lignin content (SL group: NDF 40.9% of DM, LAD 4.9% of DM; n=47). All animals were artificially inseminated (AI) at 16 weeks of age. Daily feed intake and live body weight (LBW) were recorded during the rearing period. Conception rate and prolificacy were also determined. In addition, in ten animals of each group, body composition, serum estradiol 17ß (E2), progesterone (P4) and leptin levels, as well as reproductive parameters including ovary weight, follicular population, ovulation rate, in vitro oocyte maturation (IVM), blastocyst recovery rate and in vitro embryo development were studied at AI time. Animals fed the HL diet had a significantly higher feed intake until the first AI (Pb0.003) and during the first pregnancy (Pb0.03). At 16 weeks of age, animals fed the HL diet had a lower content of lipids (Pb0.05) and crude energy (Pb0.05) than those fed the SL diet, but average LBWof does, ovary weight, and ovulation rate per doe were similar between HL and SL treatments. No significant differences were found in P4 levels. However, the HL group had elevated E2 serum levels (Pb0.003) compared to those fed with the SL diet, whereas antral follicular population was similar between groups. Both nuclear and cytoplasmic IVM measured as metaphase II and cortical granule migration rates were also similar between both groups. In addition, no differences in blastocyst recovery rate or in prolificacy were found. However, mean serum leptin levels (Pb0.05), in vitro embryo development (Pb0.03), and fertility rate (Pb0.02) were higher in the SL group compared to the HL group. In conclusion, the HL diet enhanced feed intake of does, but reduced serum leptin levels at AI time, in vitro embryo survival and conception rate.
International
Si
JCR
Si
Title
Livestock Science
ISBN
1871-1413
Impact factor JCR
1,091
Impact info
Volume
123
Journal number
0
From page
107
To page
115
Month
ENERO
Ranking
Participants
  • Autor: Maria del Pilar Garcia Rebollar (UPM)
  • Autor: Nuria Nicodemus Martin (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Producción Animal
  • Departamento: Producción Animal
S2i 2020 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)