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← Nature & AnimalsWhich risk increases for migrating salmon using swim bladders in rapidly shifting river depths?
A)Reduced scale friction coefficient
B)Hypertonic cellular membrane bursting
C)Swim bladder volume barotrauma✓
D)Osmotic pressure equilibrium slowing
💡 Explanation
Sudden pressure decrease makes dissolved swim bladder gas expand, therefore barotrauma occurs, damaging tissue, because fish cannot equilibrate quickly enough. This is swim bladder volume barotrauma, rather than hypertonic effects or surface friction decreasing at depth.
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