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Related Experiment Videos

Age differences in the controls of ring doves' pecking

K R Iskrant1, P D Balsam

  • 1Columbia College, New York, NY.

Physiology & Behavior
|December 1, 1993
PubMed
Summary

Ring dove pecking is controlled by both internal hunger (deprivation) and external food cues. These controls develop with age, with external cues becoming more influential as the birds mature.

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Area of Science:

  • Animal Behavior
  • Ethology
  • Neuroscience

Background:

  • Feeding behaviors in animals are influenced by both internal physiological states and external environmental stimuli.
  • Understanding these controls is crucial for comprehending foraging strategies and behavioral development.

Purpose of the Study:

  • To investigate the endogenous (internal) and exogenous (external) factors regulating pecking behavior in ring doves.
  • To examine how these controls change with age, from squab to adulthood.

Main Methods:

  • Three experiments were conducted using ring doves (Streptopelia risoria) at different life stages.
  • Manipulated food deprivation levels and varied the salience of food cues (seed presentation).
  • Observed and quantified pecking frequency under different experimental conditions.

Main Results:

  • Adult ring doves exhibit high pecking levels, modulated by both deprivation and external food salience.
  • In squabs, pecking is low initially but increases with deprivation by day 18.
  • Prior experience with deprivation enhances hunger-driven pecking in squabs; external cues gain influence after day 24.

Conclusions:

  • Both endogenous deprivation and exogenous food cues are critical regulators of ring dove pecking.
  • The relative importance of these controls shifts significantly during development, with exogenous cues becoming more effective in adulthood.

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