Termites eavesdrop to avoid competitors.

Area of Science:

• Ecology
• Animal Behavior
• Bioacoustics

Background:

• Competition exclusion is rare, even in species like termites that fight intensely over resources.
• Drywood termites (small colonies) coexist with subterranean termites (large colonies), defying typical competition dynamics.
• Termites use vibro-acoustic communication, making their signals detectable by others.

Purpose of the Study:

• Investigate if drywood termites eavesdrop on subterranean termite vibrations.
• Determine if drywood termites can differentiate between their own and competitor species' cues.
• Understand the role of vibro-acoustic eavesdropping in mediating interspecific competition.

Main Methods:

• Choice experiments were conducted with drywood termites (Cryptotermes secundus).
• Vibration recordings were made from both drywood and subterranean termites (Coptotermes acinaciformis).
• Behavioral responses to species-specific vibration cues were analyzed under varying wood sizes.

Main Results:

• Drywood termites distinguished between their own and subterranean termite vibration cues.
• Cryptotermes secundus was attracted to its own species' cues and repelled by Coptotermes acinaciformis cues.
• Repellent responses intensified with smaller wood sizes, indicating increased risk and cue strength.

Conclusions:

• Drywood termites use vibro-acoustic eavesdropping to avoid confrontation with dominant subterranean species.
• This behavior suggests a strategy for resource partitioning and coexistence.
• Vibro-acoustic signals are crucial for termite sensory perception, communication, and mediating interspecific interactions.