Carbon Dioxide in Fish Ponds

What are the primary sources of carbon dioxide in fish ponds?

• Respiration by fish and microscopic plants and animals

• Decomposition of organic matter

• Photosynthesis of algae and aquatic plants

• All of the above

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When is carbon dioxide concentration usually lowest in fish ponds?

• Late afternoon

• Dawn

• Midday

• Midnight

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What is the daily pattern of carbon dioxide concentration in fish ponds?

• Opposite to dissolved oxygen concentration

• Same as dissolved oxygen concentration

• Highest at midday

• Highest at midnight

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What is the relationship between dissolved oxygen and carbon dioxide concentrations in fish ponds?

• As dissolved oxygen increases, carbon dioxide decreases

• As dissolved oxygen decreases, carbon dioxide increases

• Dissolved oxygen and carbon dioxide are not related

• Dissolved oxygen and carbon dioxide have a direct relationship

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When is carbon dioxide most likely to be a problem in fish ponds?

• Winter

• Spring

• Summer

• Fall

What is the effect of warm water temperatures on carbon dioxide concentration in fish ponds?

• Increases carbon dioxide concentration

• Decreases carbon dioxide concentration

• No effect on carbon dioxide concentration

• Temperature does not affect carbon dioxide concentration

How can pH be used to estimate carbon dioxide concentration in fish ponds?

• pH increases as carbon dioxide concentration increases

• pH decreases as carbon dioxide concentration increases

• pH is not related to carbon dioxide concentration

• pH and carbon dioxide have an inverse relationship

What is the critical pH value for carbon dioxide problems in ponds with 100 mg/L of alkalinity?

• 6.5

• 7.0

• 7.5

• 8.0

What is the most effective method for managing carbon dioxide and dissolved oxygen in fish ponds?

• Chemical treatment with liming agents

• Aeration and mixing

• Increasing alkalinity

• Reducing fish density

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What is the potential consequence of chemical treatment of carbon dioxide problems in fish ponds?

• Permanent solution to carbon dioxide problems

• Temporary solution to carbon dioxide problems

• Increased fish growth and production

• Decreased fish growth and production

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