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What does super-saturation of water body with DO cause ?

A. Eutrophication B. Gas bubble disease in fish C. Methamoglobinemia D. Endemic goitre


Answer : (B) Gas Bubble disease in fish
 Supersaturated water can cause gas bubble disease in fish and invertebrates. Significant death rates occur when dissolved oxygen remains above 115%-120% air saturation for a period of time. Total mortality occurs in young salmon and trout in under three days at 120% dissolved oxygen saturation. Invertebrates, while also affected by gas bubble disease, can usually tolerate higher levels of supersaturation than fish .

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The correct answer is B.Gas bubble disease in fish.
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