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Summary College 6 - Poultry

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A snapshot of the summary - College 6 - Poultry

  • 1 Domestication

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  • What is the difference in egg production and feather pecking between the modern chicken and its ancestor?
    • Ancestor of the chicken laid about 60 eggs per year, while the modern chicken lays about 300 eggs per year
    • Feather pecking is the same in both species.
  • 2 Genetic selection

  • What are the the main traits of laying hens and broilers?
    Laying hens:
    • Early onset of egg laying
    • High rate of egg production
    • High egg quality
    • Low feed conversion ratio
    Broilers:
    • Fast growth
    • Low feed conversion ratio
    • Large breast size and high meat yield.
  • 3 Communication

  • What is the vision range of the chicken?
    They van see the ultra violet aspect of the color scale and they have a very broad spectrum.
  • How do chickens communicate?
    Mainly through visual and vocal signals. They have an acute hearing.
  • 4 Postures and displays

  • What 3 types of postures do chickens use to communicate?
    • Threats
    • Social submission
    • Courtship behavior
  • What are the important features of chickens in communications via postures and displays?
    The most important features are comb size and colour.
  • 5 Vocalisations

  • Which different types of vocalizations do chickens use?
    • Warning calls
    • Contact calls
    • Signalling threat or submission
    • Food calls
    • Long distance crows as a territorial defense 
  • 6 Social dominance/problems

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  • How are social hierarchies maintained in chickens?
    They are maintained through aggressive pecks to the head and displays of submissive behavior.
  • Why do chickens flock together?
    • Protection against predators
    • Behavioral synchronization (eg dustbathing)
    • Behavioral facilitation
  • What happens when the flocks are very large (>100 birds)?
    • Birds won't recognize each other anymore
    • There is a risk of social problems (al vanaf meer dan 30 vogels) like:
      - Bullying in laying hens
      - Feather picking and canibalism
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