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Sound produced | yes, active sound production |
产生的声音类型 | low "unk", thumps, clicks, scrapes & escape sounds |
产生声音的器官 | swim bladder, teeth |
Sound mechanism | no associated swim bladder musculature, probably vibration by general body contraction |
行为背景 | startle or duress (handling or electric stimulation) |
Reference | Fish, M.P. and W.H. Mowbray, 1970 |
附注 | sound always coincident with suddenly increased activity |