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← Nature & AnimalsWhich action will directly reduce the effectiveness of a fish's swim bladder in deep water?
A)Increased reliance on pectoral fins
B)Reduced blood oxygen carrying capacity
C)Elevated bladder gas reabsorption rate✓
D)Decreased carbon dioxide partial pressure
💡 Explanation
Increased gas reabsorption reduces bladder inflation, altering buoyancy control, because increased pressure encourages faster diffusion across the gas gland, affecting the capacity to neutralize increased water pressure. Therefore reabsorption impairs buoyancy, as opposed to fin use, blood, or CO2 levels, which have secondary effects.
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