The effect of rapid changes of hydrostatic pressure on the Atlantic herring Clupea harengus L. II. The response of the auditory bulla system in larvae and juveniles

摘要: Abstract Rupturing of the pro-otic membrane Atlantic herring ( Clupea harengus L.) occurs if hydrostatic pressure is rapidly increased from 1 to 3 aim in 12 15 cm long fish. Smaller juveniles and larvae arc much less at risk. The effects depend on an adapting mechanism which involves development swimbladder a length 30–35 mm. acts as reservoir or sink gas for bulla. time constants this adaptation can be measured by observations external lateral recess intact fish internal bulla transparent dissected older constant order 0.3–1.75 min depending observed, whether decreased system has been ‘in use’ not. This implication entrainmcnt smaller stages pass screens power station intakes ‘acceptable’ depth ranges rates vertical migration all stages.