The main cause of fish killing in ponds is often due to Algal Bloom (c). Here's why:

1. Algal Bloom: This is a rapid increase in the population of algae in an aquatic system. Algal blooms may occur in freshwater as well as marine environments. They can produce toxins that are harmful to other species and can cause a decrease in oxygen levels in the water. When the algae die and decompose, they use up even more oxygen, which can lead to fish kills.

2. Dissolved Oxygen (DO): While low levels of dissolved oxygen can cause fish to die, it is not the main cause. It is usually a result of other factors, such as algal blooms, that consume the oxygen in the water.

3. pH: Extreme pH levels can be harmful to fish, but it is not typically the primary cause of fish kills. Fish can usually survive in a range of pH levels, as long as it doesn't change too quickly.

4. All: While all these factors can contribute to fish kills, the main cause is typically algal blooms.

So, the answer is c. Algal Bloom.

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The main cause of fish killing in ponds is often due to Algal Bloom (c). Here's why:

1. Algal Bloom: This is a rapid increase in the population of algae in an aquatic system. Algal blooms may occur in freshwater as well as marine environments. They can produce toxins that are harmful to other species and can cause a decrease in oxygen levels in the water. When the algae die and decompose, they use up even more oxygen, which can lead to fish kills.

2. Dissolved Oxygen (DO): While low levels of dissolved oxygen can cause fish to die, it is not the main cause. It is usually a result of other factors, such as algal blooms, that consume the oxygen in the water.

3. pH: Extreme pH levels can be harmful to fish, but it is not typically the primary cause of fish kills. Fish can usually survive in a range of pH levels, as long as it doesn't change too quickly.

4. All: While all these factors can contribute to fish kills, the main cause is typically algal blooms.

So, the answer is c. Algal Bloom.

Knowee AI · Accepted Answer

The main cause of fish killing in ponds is often due to Algal Bloom (c). Here's why:

1. Algal Bloom: This is a rapid increase in the population of algae in an aquatic system. Algal blooms may occur in freshwater as well as marine environments. They can produce toxins that are harmful to other species and can cause a decrease in oxygen levels in the water. When the algae die and decompose, they use up even more oxygen, which can lead to fish kills.

2. Dissolved Oxygen (DO): While low levels of dissolved oxygen can cause fish to die, it is not the main cause. It is usually a result of other factors, such as algal blooms, that consume the oxygen in the water.

3. pH: Extreme pH levels can be harmful to fish, but it is not typically the primary cause of fish kills. Fish can usually survive in a range of pH levels, as long as it doesn't change too quickly.

4. All: While all these factors can contribute to fish kills, the main cause is typically algal blooms.

So, the answer is c. Algal Bloom.

Which of the following is main cause of fish killing in ponds a.All b.DOc.Algal Bloomd.pH

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