Question

why phytotoxicant is preferred during prestocking pond management? ​

Answer 1

Answer:

Explanation:

• The ponds need to be prepared such that the pond environment provides optimum condition for growth of the fish.

• The pond environment should be free from predators, aquatic weeds, weed fish; it should have optimum water quality parameters and sufficient natural food should be available in semi- intensive culture systems.

•  The steps involved in pre-stocking and post-stocking management are similar in the nursery, rearing and grow-out ponds.

• An additional step in the pre-stocking management in nursery ponds is the eradication of aquatic insects which predate on spawn and fry.

The pre-stocking pond management of drainable ponds, which can be dried, is as follows.  

• Draining and drying

• Ploughing `

• Liming

• Filling with water and

• Fertilization

Perennial un-drainable water bodies require the following additional pre-stocking management measures.

• Control of aquatic weeds

• Eradication of weed fish and predatory fish and animals.

Nursery ponds require eradication of aquatic insects as an additional pre-stocking management meature.

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