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Short-term methionine supplementation during the early post-partum period in primiparous rabbits improves prolificacy associated with an increase in serum concentrations of IGF-I.

Authors
  • Lopéz-Cedillo, Z B1
  • Rosales-Torres, A M1
  • Mendoza, G D1
  • Heuze, Y1
  • Ávila-Espítia, A E1
  • Guzmán, A1
  • 1 Universidad Autónoma Metropolitana-Xochimilco, Ciudad de México, México.
Type
Published Article
Journal
Journal of animal physiology and animal nutrition
Publication Date
Oct 01, 2017
Volume
101
Issue
5
Identifiers
DOI: 10.1111/jpn.12619
PMID: 27747966
Source
Medline
Keywords
License
Unknown

Abstract

The aim of this study was to evaluate the effects of methionine supplementation on energy metabolism and reproductive performance during the early post-partum period in primiparous does. Forty nulliparous New Zealand White does were used. Females were randomized in two groups at calving: the control group (n = 20) was fed with the basal diet, and the methionine group (n = 20) was fed the basal diet plus 1 g/animal/day of methionine from the day of calving to 4 days post-partum. Results showed that methionine supplementation increased (p = 0.032) the concentration of insulin-like growth factor-1 with respect to control group 4 days post-partum. It similarly increased the prolificacy (p = 0.03), the number of kits born alive per litter (p = 0.06) and the body gain weight of the litter during supplementation (p = 0.035). These results were observed despite the does in the methionine group having a deeper negative energy balance than the does in the control group. Finally, methionine supplementation did not affect receptivity (p = 0.23), fertility (p = 0.49), the number of kits born dead per litter (p = 0.86) insulin and metabolites as glucose, non-esterified fatty acids and triglycerides. In conclusion, our results show that methionine supplementation during the first 4 days of the post-partum period in rabbits increases total litter size and the corporal weight of kits and is associated with an increase in blood concentration of IGF-1.

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