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  1. Home
  3. Structural Equation Models For Slaughtering Weight Prediction For Broilers.
  1. Home
  3. Structural Equation Models For Slaughtering Weight Prediction For Broilers.

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Structural equation models for slaughtering weight prediction for broilers.

Ricardo Hummes Rauber1, Luis Orlando Duitama Carreno2, Rodrigo de Oliveira Pacheco1

  • 1Universidade Tecnológica Federal do Paraná Campus Dois Vizinhos, Estrada para Boa Esperança, km 4 - Zona Rural, Dois Vizinhos, Paraná, 85660-000, Brazil.

Tropical Animal Health and Production
|January 3, 2021

View abstract on PubMed

Summary
This summary is machine-generated.

Broiler gut health indirectly impacts final flock weight by affecting early body weight and mortality. Accurate prediction equations for broiler final weight can be developed using data from 14 and 21 days.

Keywords:
GrillerPerformancePoultry farmingPrediction modelsWeight gain

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Area of Science:

  • Animal Science
  • Poultry Science
  • Veterinary Medicine

Background:

  • Broiler production relies on optimizing flock performance and final weight.
  • Gut health is a critical factor influencing overall broiler health and productivity.
  • Predictive models for broiler weight are valuable for farm management.

Purpose of the Study:

  • To assess the influence of gut health parameters on broiler final flock weight.
  • To develop predictive equations for estimating broiler final weight at early stages (7, 14, 21 days).
  • To identify key factors affecting broiler final weight under field conditions.

Main Methods:

  • Gut health parameters (e.g., gizzard erosion, coccidiosis, intestinal content analysis) were evaluated at 7 and 14 days.
  • Structural equation modeling was used to analyze the relationships between gut health, intermediate growth parameters (body weight, mortality), and final flock weight.
  • Data on stocking density, litter reuse, and downtime were also incorporated.

    • Main Results:

    • Stocking density and litter reuse did not significantly impact final flock weight.
    • Downtime period, body weight, and mortality at 14 and 21 days directly influenced final flock weight.
    • Gut health parameters indirectly affected final flock weight by influencing body weight and mortality at 14 days.
    • Predictive equations for final flock weight were established with R² values of 0.56 (14 days) and 0.77 (21 days).

    Conclusions:

    • Gut health is an indirect but significant factor in broiler final weight determination.
    • Early-life growth parameters (body weight, mortality) are strong predictors of final flock weight.
    • The developed equations provide reliable tools for estimating broiler final weight in field settings.