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Table 4 Measured and calculated pulse periods of female sounds from Ophidion rochei

From: Sexual dimorphism of sonic apparatus and extreme intersexual variation of sounds in Ophidion rochei (Ophidiidae): first evidence of a tight relationship between morphology and sound characteristics in Ophidiidae

 

Captivity

Field

Pulse period (ms)

Measured (automatically during sound analysis)

4.0

3.7

 

Calculated (1/fundamental frequency)

4.1

4.0