Question

In the breeding of Indian major carps, which of the following type is used commonly

• A. Circular hatchery
• B. Rectangular hatchery
• C. Diagonal hatchery
• D. Square hatchery

Hint:

The Chinese circular hatchery is highly efficient because it combines breeding, spawning, hatching, and early larval holding operations in a continuous flowing-water system.

Answer 1

The Correct Option is A

Step 1: Understanding the Concept:
Hatchery systems are designed to simulate natural spawning conditions and provide highly oxygenated, flowing water for successful fertilization, hatching, and early rearing.

Step 2: Detailed Explanation:
The Chinese circular hatchery (often called the Eco-hatchery or circular pool hatchery) is the most widely and successfully used hatchery design in India for breeding Indian Major Carps.
It features a circular breeding pool with water inlets set at an angle to create a continuous circular current.
This design successfully simulates natural riverine spawning conditions, keeping the pelagic carp eggs suspended and highly oxygenated, leading to maximum fertilization and hatching rates.

Step 3: Final Answer:
The most commonly used hatchery is the Circular hatchery, which corresponds to option (A).