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Fig. 6. (A) The escalation in behavioural responses of late instar Antheraea
polyphemus larvae to increasing levels of disturbance. CR,
neither clicking nor regurgitation; C+R, clicking only; CR+,
regurgitation only; C+R+, clicking and regurgitation. C+R+ increased between
one-, two- and five-pinch trials, whereas C+R decreased between one-,
two- and five-pinch trials. (B) The temporal relationship between clicking and
regurgitation. In almost all five-pinch trials, the acoustic signaling
occurred before regurgitation. *Significant difference
(P<0.001).