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Direction finding by hornets under gravitational and centrifugal forces
Science (New York, N.Y.)
|November 21, 1975
Summary
Young hornets adapt comb building to resultant forces, while adults rely on gravity. This indicates hornets learn gravitational cues early in life, influencing their construction behavior.
Area of Science:
- Behavioral Ecology
- Insect Behavior
- Biophysics
Background:
- Comb construction is crucial for insect colonies.
- Understanding insect navigation and force perception is key to their survival.
- Hornets (Vespidae) exhibit complex social behaviors, including nest building.
Purpose of the Study:
- To investigate the influence of combined centrifugal and gravitational forces on hornet comb construction.
- To determine how age affects hornet response to force direction during comb building.
- To elucidate the role of early-life learning and environmental cues in hornet nest orientation.
Main Methods:
- Experimental assessment of comb construction in hornets exposed to centrifugation.
- Comparison of comb building in juvenile (1-2 days) versus adult (3-7 days) hornets.
- Analysis of cell orientation relative to resultant force and gravitational force.
Main Results:
- Juvenile hornets oriented comb cells towards the resultant force vector.
- Adult hornets resisted centrifugal force, building cells towards gravity.
- Nest initiation sites differed: juveniles used side walls, adults used the roof.
Conclusions:
- Hornets rapidly acquire gravitational force perception within the first week of life.
- Geometric cues within the nest environment aid habituation to specific force directions.
- Age-dependent plasticity in force perception influences hornet comb construction strategies.
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