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Related Experiment Videos

Avian personalities: characterization and epigenesis.

Ton G G Groothuis1, Claudio Carere

  • 1Animal Behaviour Group, University of Groningen, P.O. Box 14, 9750 AA Haren, The Netherlands. t.groothuis@biol.rug.nl

Neuroscience and Biobehavioral Reviews
|January 18, 2005
PubMed
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This study reveals that bird personality, or behavioral profiles, have a strong genetic basis and are influenced by maternal effects and developmental plasticity. These distinct personalities are maintained in wild populations through selection pressures and assortative mating.

Area of Science:

  • Behavioral ecology
  • Animal behavior
  • Evolutionary biology

Background:

  • Understanding the origins and maintenance of behavioral diversity is crucial in evolutionary biology.
  • Personality, or behavioral profiles, are increasingly recognized as important in various animal species.
  • The great tit (Parus major) serves as a model organism for studying behavioral traits in wild populations.

Purpose of the Study:

  • To investigate the nature, epigenesis, and function of behavioral profiles in the great tit.
  • To explore the genetic and environmental factors influencing the development of these profiles.
  • To understand the mechanisms maintaining personality variation in natural populations.

Main Methods:

  • Bidirectional selection experiments for exploration behavior in great tits.

Related Experiment Videos

  • Analysis of social, non-social, and physiological behavioral differences between selected lines.
  • Genetic studies including replication, backcrosses, and ontogenetic manipulations.
  • Field data collection on fitness parameters and mating behavior.

    • Main Results:

    • Selected lines exhibited significant behavioral and physiological differences with temporal consistency.
    • A surprising similarity in behavioral profile organization was found between great tits and rodents.
    • Strong genetic basis, maternal effects, and developmental plasticity were identified in epigenesis.
    • Behavioral traits within a profile could become uncoupled.
    • Field data suggested selection pressure and assortative mating maintain personality variation.

    Conclusions:

    • Bird behavioral profiles have a complex epigenesis involving genetic, maternal, and plastic environmental influences.
    • A fundamental principle may underlie behavioral profile organization across taxa, though caution is needed for generalization.
    • Natural selection and non-random mating are plausible mechanisms for maintaining personality diversity in wild great tit populations.