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Preweaning variables' influence on market traits in rabbits
F A Ferguson1, S D Lukefahr, J I McNitt
1Department of Animal & Wildlife Sciences, Texas A&M University-Kingsville 78363, USA.
Journal of Animal Science
|March 1, 1997
Summary
Preweaning factors like milk consumption and body weight significantly influence fryer rabbit market traits, especially 70-day body weight. Litter size is less critical, and seasonal variations impact performance, necessitating management adjustments for optimal yield.
Area of Science:
- Animal Science
- Agricultural Science
- Rabbit Production
Background:
- Preweaning variables significantly impact the growth and market performance of fryer rabbits.
- Understanding these influences is crucial for optimizing rabbit farming practices and profitability.
Purpose of the Study:
- To investigate the influence of preweaning variables on key market traits in fryer rabbits.
- To determine the predictive power of early-life factors on later performance metrics.
- To identify critical factors for improving rabbit production efficiency.
Main Methods:
- Utilized data from 338 fryer rabbits across 52 litters.
- Measured variables at 1, 8, and 15 days, including litter size, body weight (BW), BW rank score, and litter uniformity (CV).
- Assessed daily milk consumption and calculated dominance rank scores, analyzing market traits (ADG, BW70, FI, CV70, LS70, RANK70) using regression models with season as a covariate.
Main Results:
- Weekly models accurately predicted average daily gain (ADG), 70-day body weight (BW70), litter feed intake (FI), and litter size (LS70) (R² = .542–.970).
- Prediction for litter uniformity (CV70) and rank score (RANK70) was less precise (R² = .202–.369).
- Season significantly affected ADG, BW70, and FI (partial R² = .285–.435); milk consumption and BW were more critical for BW70 than litter size.
Conclusions:
- Early-life milk consumption and body weight are primary drivers of 70-day body weight in fryer rabbits.
- Litter size and dominance rank score are key determinants of litter size at weaning.
- Management strategies should focus on optimizing feed intake, doe milk yield, and seasonal adjustments to enhance fryer performance.