|
| |
|
|
|
|
||||
| Home Help Feedback Subscriptions Archive Search Table of Contents | ||||
|
Fig. 6. Sound production by multiband butterflyfish, Chaetodon
multicinctus, intruders during encounters with conspecific territory
holders. (A) The pelvic flick behavior by an intruder involves the extension
of the pelvic fins that produces an acoustic stimulus during this motion
(waveform on lower trace). This sound has a frequency spectrum just below 200
Hz and is also produced during displays by resident fish towards bottled
intruders. Arrows show start and end of pelvic fin extension. (B) The grunt
train sound is produced by bottled intruder pairs when confronted by territory
residents. Unlike all other acoustic signals observed, the grunt train was not
associated with any visible body movements, thus most likely is caused by
internal muscle movements. This sound included a series of regular spaced
pulses (waveform on lower trace) that have a strong frequency component at
400-500 Hz (spectrogram). Note the harmonics associated with each pulse that
indicate that this internally generated sound may result in part from
resonance of the swim bladder.
|
