Determination of space use by laying hens using kinematic analysis
Joy A Mench1, Richard A Blatchford
1Department of Animal Science and Center for Animal Welfare, University of California, Davis 95616.
Poultry Science
|April 8, 2014
Summary
This study measured the space needs of laying hens for behaviors like standing and wing flapping. Findings provide a framework for space requirements in commercial poultry housing.
Area of Science:
- Animal Science
- Ethology
- Biomechanical Engineering
Background:
- Legislation in two US states mandates adequate space for laying hens to perform specific behaviors.
- Translating these performance standards into quantifiable space requirements is crucial for compliance and animal welfare.
Purpose of the Study:
- To quantify the space requirements for individual White Leghorn hens performing key behaviors: standing, turning, lying down, and wing flapping.
- To establish a scientific basis for space allowances in poultry housing systems.
Main Methods:
- Kinematic analysis using 3D motion capture of hens in a controlled pen.
- High-speed cameras filmed marked hens (head, wings, toes) to track movement.
- 2D analysis of lying behavior was conducted using superimposed grids on videos from home cages.
Main Results:
- Mean area requirements: standing (563 cm²), turning (1,316 cm²), lying down (318 cm²), and wing flapping (1,693 cm²).
- Mean height requirements: standing (34.8 cm), turning (38.6 cm), and wing flapping (49.5 cm).
- Individual space needs do not directly translate to group housing requirements.
Conclusions:
- Individual hen space requirements for basic movements have been quantified.
- Group housing necessitates additional considerations for synchronized behaviors and resource access.
- Further research is needed to develop comprehensive space standards for commercial flock management.
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