Table 1. Characteristics (mean ± SE) of chewing vibrations recorded from feeding larvae of the cowpea beetle Calosobruchus maculatus.

Sources of variation		Characteristics
Strain	Sex	Periodicity (events/s)	Dominant frequency (Hz)	Bandwidth (Hz) at 3 dB	Amplitude (RMS)
Brazilian	Female	4.10 ± 0.54	2,400.00 ± 86.60	884.66 ± 39.44	9,354.43 ± 2,483.03
	Male	4.02 ± 0.46	2,325.00 ± 75.00	864.22 ± 37.62	10,150.22 ± 3,166.57
Indian	Female	5.01 ± 0.57	2,512.50 ± 81.01	750.34 ± 80.27	9,158.15 ± 3,079.65
	Male	4.88 ± 0.58	2,475.00 ± 91.85	700.70 ± 22.62	8,189.46 ± 727.19

The results are from 10 individual trials with larvae between 18 and 21 days old; the rates reported were sampled from the first 30 seconds of chewing.