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Published on: October 15, 2021
Reappraising social insect behavior through aversive responsiveness and learning
Edith Roussel1, Julie Carcaud, Jean-Christophe Sandoz
1Research Center on Animal Cognition (UMR5169), Centre National de la Recherche Scientifique (CNRS)-University Paul-Sabatier, Toulouse, France.
Plos One
|January 15, 2009
Summary
Honeybee division of labor is not based on a single response threshold. Instead, distinct appetitive and aversive behavioral modules influence task specialization, challenging previous models.
Area of Science:
- Behavioral Ecology
- Neuroethology
- Social Insect Behavior
Background:
- Division of labor in social insects is often explained by response threshold models.
- This model suggests individuals have varying thresholds for task-specific stimuli.
- Existing honeybee data contradicts this, showing nectar foragers have higher sucrose response thresholds.
Purpose of the Study:
- To investigate if responsiveness to appetitive (sucrose) and aversive (electric shock) stimuli are independent in honeybees.
- To determine the relationship between aversive responsiveness, learning, and memory.
- To understand how these factors relate to the division of labor in honeybee colonies.
Main Methods:
- Measured proboscis extension responses to sucrose and sting extension responses to electric shocks in individual bees.
- Assessed aversive olfactory conditioning of the sting extension reflex.
- Correlated responsiveness measures with division of labor roles (e.g., guards, foragers).
Main Results:
- Responsiveness to sucrose and electric shocks did not correlate, indicating separate behavioral syndromes (foraging vs. defensive).
- Higher shock responsiveness correlated with better aversive learning and memory.
- Guard bees showed lower shock responsiveness (higher tolerance) than nectar foragers.
Conclusions:
- Honeybees possess parallel behavioral modules (appetitive, aversive) influencing task specialization.
- This challenges the simple response threshold model for division of labor.
- Findings suggest a more complex interplay of independent behavioral traits in social organization.
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