Honest signalling during prey-predator interactions in the lizard Anolis cristatellus

Area of Science:

• Animal Behavior
• Evolutionary Biology
• Ecology

Background:

• Prey species often evolve signals to deter predators.
• Pursuit-deterrent signals may communicate prey's ability to escape.
• Anolis cristatellus lizards exhibit pushup displays during social interactions.

Purpose of the Study:

• To test the hypothesis that pushup displays function as pursuit-deterrent signals in Anolis cristatellus.
• To investigate if signal intensity correlates with individual physiological condition.
• To explore the dual role of pushup displays in predator deterrence and social signaling.

Main Methods:

• Staged predator-prey encounters using Anolis cristatellus lizards and a predator model.
• Quantified pushup display intensity during simulated predation events.
• Measured individual physiological condition, specifically endurance capacity.

Main Results:

• Pushup displays were supported as pursuit-deterrent signals.
• Signal intensity (number of pushups) positively correlated with endurance capacity.
• Endurance capacity is a key factor in prey escape ability.

Conclusions:

• Anolis cristatellus pushup displays serve as honest signals of escape ability.
• Predation pressure and sexual selection may co-select for pushup displays.
• The same signal can convey individual quality to predators and conspecifics.