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|Sound produced||yes, active sound production|
|Type of sound produced||escape sounds & thumps|
|Sound production organ||swim bladder|
|Sound mechanism||not specified|
|Behavioural context||escape sounds when swimming induced, thumps under duress (manual & electric stimulation)|
|Reference||Fish, M.P. and W.H. Mowbray, 1970|
|Remark||sounds increasing with intensity with increasing duress, recording amplified by 3 dB|