The minimum concentration (ppm) of dissolved oxygen in water that is required for the growth of fish is
Show Hint
- Dissolved oxygen (DO) levels in water must be maintained above 6 ppm for healthy fish populations.
- Low DO levels can lead to hypoxia, which negatively affects aquatic life.
- Factors affecting DO levels include temperature, water pollution, and algal blooms.
- 10
- 8
- 12
- 6
The Correct Option is D
Solution and Explanation
Step 1: Understanding Dissolved Oxygen (DO) in Water
- Dissolved oxygen (DO) is essential for the survival of aquatic organisms, including fish.
- The minimum required concentration of DO for fish growth is generally 6 ppm (parts per million).
- If the DO level drops below this threshold, it can lead to stress and suffocation in fish populations.
Step 2: Verifying the Correct Answer
- The recommended minimum concentration of DO in natural water bodies for healthy fish growth is 6 ppm.
- The other options (8 ppm, 10 ppm, 12 ppm) represent higher concentrations that are beneficial but not the absolute minimum required.
- Thus, the correct answer is 6 ppm (Option 4).
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