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Termite Vibration Sensing: The Chordotonal Organs and Their Appendages
Travers M Sansom1, Joseph C S Lai2, Benjamin J Halkon1
1Centre for Audio, Acoustics and Vibration University of Technology Sydney Sydney New South Wales Australia.
Ecology and Evolution
|October 20, 2025
Summary
Termite legs and antennae are highly sensitive to vibrations, aiding communication and survival. Their morphology suggests better vibration detection than ants, potentially for sensing wood-borne signals.
Area of Science:
- Entomology
- Bioacoustics
- Sensory Biology
Background:
- Eusocial insects like termites and ants utilize diverse communication methods.
- Termites, lacking sight and fewer glands, heavily depend on vibrations for foraging, communication, and predator avoidance.
- The physiological mechanisms of vibration detection in termites are understudied.
Purpose of the Study:
- To investigate the role of termite legs and antennae as sensory probes for vibration detection.
- To compare the vibrational sensory adaptations of termites with those of ants.
- To understand how morphological differences relate to vibrational sensitivity and ecological roles.
Main Methods:
- Morphological comparison of termite and ant appendages (legs and antennae), focusing on slenderness ratios.
- Analysis of vibration amplification frequencies in termite and ant tibiae.
- Hypothesizing functional implications based on morphology and vibrational sensitivity.
Main Results:
- Termite legs and antennae exhibit lower slenderness ratios compared to ants.
- Termite tibiae amplify lower-frequency vibrations (0-2.25 kHz), suitable for wood-borne signals.
- Ant tibiae amplify higher-frequency vibrations (1.9-3.1 kHz), aligning with their diverse foraging terrains.
Conclusions:
- Termite legs and antennae possess morphological traits suggesting enhanced vibration sensitivity compared to ants.
- The vibrational sensitivity of termites is adapted to their wood-based diet.
- Termite legs may function as an integrated auditory complex for sensing environmental vibrations.
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