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Suggestions to Derive Maximum Stocking Densities for Layer Pullets.

E Tobias Krause1, Lars Schrader2

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Summary

Maximum stocking densities for layer pullets are proposed using relative additional space, a key parameter. This research suggests 40-60% relative additional space for pullets at the end of their rearing period.

Keywords:
broilerhousingmodelingplanimetric measurementpoultrypulletsrearingspace requirementstocking densitywelfare

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Area of Science:

  • Animal Science
  • Agricultural Engineering
  • Animal Welfare

Background:

  • European Union (EU) Council Directives regulate stocking densities for domestic chickens (Gallus gallus domesticus), specifically for laying hens and broiler chickens.
  • Currently, no specific regulations exist for stocking density in layer pullets.
  • Existing directives provide a basis for calculating appropriate space requirements for different chicken types.

Purpose of the Study:

  • To establish maximum stocking density guidelines for layer pullets.
  • To identify a key parameter for deriving these guidelines.
  • To propose a scientifically-backed recommendation for layer pullet rearing conditions.

Main Methods:

  • Calculated required floor space per chicken based on live body mass.
  • Determined absolute additional space available per bird.
  • Derived relative additional space per individual pullet.
  • Analyzed scenarios considering EU directives for laying hens and broiler chickens.

Main Results:

  • Identified relative additional space as a crucial metric for stocking density.
  • Calculated additional space requirements for various live body mass classes of pullets.
  • The study suggests an ideal relative additional space of 40-60% for layer pullets.

Conclusions:

  • Relative additional space is a suitable parameter for setting maximum stocking density for layer pullets.
  • Layer pullets should ideally have 40-60% relative additional space at the end of their rearing period.
  • This research contributes to the welfare of layer pullets by proposing evidence-based space recommendations.