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Body reserves and ovarian performance in primiparous lactating rabbit does submitted to early weaning as a strategy

O G Sakr1, R M García-García, M Arias-Alvarez

  • 1Department of Animal Production, Polytechnic University of Madrid, Spain.

Animal Reproduction Science
|August 10, 2010
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Summary
This summary is machine-generated.

Early weaning of rabbit does at 25 days post-partum improved body energy stores but did not enhance ovarian status by 32 days post-partum. Ovarian maturation rates were similar across weaning strategies, suggesting weaning could be delayed.

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Area of Science:

  • Animal Science
  • Reproductive Biology
  • Animal Nutrition

Background:

  • Primiparous lactating rabbit does experience energy deficits before insemination.
  • Early weaning is a strategy to manage energy balance in lactating does.
  • Optimizing reproductive efficiency in rabbits is crucial for commercial production.

Purpose of the Study:

  • To investigate the impact of early weaning (25 days post-partum) on body composition, metabolic parameters, and ovarian status in primiparous rabbit does.
  • To evaluate if early weaning influences energy deficit management and subsequent reproductive readiness.
  • To determine the optimal weaning time for primiparous lactating rabbit does.

Main Methods:

  • 34 primiparous lactating rabbit does were divided into three groups: early weaned (25 dpp), non-weaned lactating, and controls.
  • Body composition, serum metabolic parameters (NEFA, total protein, glucose), and ovarian status were assessed.
  • Ovarian parameters included follicle count, follicular population, and oocyte maturation rates (nuclear and cytoplasmic).

Main Results:

  • Early weaned does (NL32) showed improved body energy stores (lipids, protein, energy) and lower serum glucose compared to controls.
  • No significant differences were found in live body weight, ovary weight, or serum NEFA and total protein.
  • Despite improved energy stores, early weaning did not significantly improve ovarian status, follicle count, or oocyte maturation rates (Metaphase II, cortical granule migration).

Conclusions:

  • Early weaning at 25 days post-partum improves body energy reserves in primiparous rabbit does.
  • This improvement in energy stores does not translate to enhanced ovarian status or oocyte maturation by 32 days post-partum.
  • Weaning could potentially be performed later without negatively impacting ovarian status at 32 days post-partum.