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Discriminative taste aversion learning: a learning task for older chickens.

Rebbekah Atkinson1, Lia R M Bevilaqua, John A P Rostas

  • 1Hunter Medical Research Institute and Schools of Behavioural Science and Biomedical Sciences, University of Newcastle, University Drive, Callaghan, NSW 2308, Australia.

Neurobiology of Learning and Memory
|December 17, 2002
PubMed
Summary

Researchers developed a new Discriminative Taste Aversion Learning (DTAL) method for studying chicken learning and memory in both young and older birds. Protein synthesis is crucial for consolidating this learned aversion, with specific timing requirements.

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Area of Science:

  • Neuroscience
  • Animal Behavior
  • Cognitive Science

Background:

  • Traditional chicken learning models like passive avoidance and imprinting are limited to young animals.
  • A need exists for versatile learning paradigms applicable across different age groups in chickens.
  • Investigating the neurobiological basis of learning and memory in avian models is crucial.

Purpose of the Study:

  • To introduce and validate a novel behavioral learning paradigm, Discriminative Taste Aversion Learning (DTAL), for chickens.
  • To assess the capacity of DTAL for evaluating learning and memory in both young and older chickens.
  • To determine the role and timing of protein synthesis in memory consolidation for the DTAL task.

Main Methods:

  • Chickens were trained using DTAL, associating one colored food crumb (red or yellow) with an aversive substance (methylanthranilate).

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  • Learning was assessed by presenting unbaited colored crumbs at varying intervals post-training.
  • The protein synthesis inhibitor anisomycin was administered intracranially at different time points relative to training to assess its effect on memory consolidation.

    • Main Results:

    • Chickens at 5 and 15 days post-hatch successfully learned to avoid the aversive-associated crumbs.
    • Anisomycin injection 15 minutes pre-training or 45 minutes post-training significantly impaired long-term memory (tested 24 hours later).
    • Anisomycin injections 120 minutes post-training did not affect memory, indicating a critical time window for protein synthesis.

    Conclusions:

    • DTAL is an effective and versatile behavioral paradigm for studying learning and memory in chickens of various ages.
    • Protein synthesis is essential for the consolidation of long-term memory in the DTAL task.
    • The timing of protein synthesis required for memory consolidation in DTAL aligns with findings from other avian learning paradigms.