Table 1.

Means (±s.e.m.) of call parameters for the three experimental categories: M. macrophyllumind, M. macrophyllumgroup and A. jamaicensis

Peak frequency (kHz)
Experimental groupDuration (ms)Pulse interval (ms)Repetition rate (calls s–1)2nd Harmonic3rd HarmonicBW–20dB (kHz)Lower frequency (kHz)Upper frequency (kHz)Mean SL (dB SPL)Max. SL (dB SPL)
M. macrophyllum individual1.3A37.8A26.0A56.6A82.1C17.3A45.863.1101A105
(±0.0)(±1.7)(±1.4)(±0.3)(±0.3)(±0.4)(±0.4)(±0.3)(±0.9)
n=183n=160N=20n=18n=165n=38n=38n=38n=125
N=21N=20N=21N=21N=19N=19N=19N=15
M. macrophyllum group1.4A32.3A33.7B54.2B80.6C17.4A43.761.095B100
(±0.1)(±4.0)(±1.9)(±0.2)(±1.4)(±0.4)(±0.4)(±0.4)(±1.2)
n=72n=69N=10n=59n=13n=20n=20n=20n=52
N=10N=10N=10N=10N=10N=10N=10N=6
A. jamaicensis 0.9B62.5B18.6C78.824.4B66.090.496B110
(±0.1)(±6.4)(±1.9)(±1.0)(±1.0)(±0.7)(±0.7)(±1.7)
n=116n=97N=19n=116n=30n=30n=30n=116
N=19N=17N=19N=17N=17N=17N=18
  • Source levels (SL) are from bats >2 m away from the microphones. Mean and maximum source levels are given. Numbers with different superscript letters are significantly different. For both M. macrophyllumind and M. macrophyllumgroup, bandwidth (BW–20dB) is given for the second harmonic, for A. jamaicensis it is for the third harmonic. N is the number of flight sequences and n the number of calls analysed