Portable Carp Hatchery

Components of the Portable Carp Hatchery

The Portable carp hatchery system comprises of usual components such as breeding pool, incubation/hatching pool, egg/spawn collection unit, and water storage tank (Jena et al., 2005) as that of Chinese eco-hatchery.

Breeding Pool

• It is cylindrical in shape with 2.15m diameter and 0.9m height with bottom sloping (1:22) uniformly towards outlets at the center. The thickness of the FRP wall is 4.2-6.0mm. Water circulation is created in the tank through a number of inlet pipes fitted at the bottom of the side wall of the tank.
• Showers are provided at the top to sprinkle water during spawning. The inlets and outlets of the system are properly fitted with water controlling valves. The water holding capacity of the breeding pool is 2,300 liters and is suitable to breed10-12 kg of carps at a time

Incubation/Hatching Pool

• The hatching pool is cylindrical in shape with 1.4 m diameter and 1.0 m height. It consists of egg incubation chamber, inner chamber, FRP socket, water supply and outlet systems.
• The diameter of the inner chamber is 0.4 m and height 0.9 m. It is covered with nylon bolting cloth to filter out the excess water from egg incubation chamber to the drain.
• Five RPVC (15 mm dia) duck-mouths are fitted at the bottom of the egg incubation chamber in-between outer and inner walls at equal distances to get required water circulation.
• The unit has two drainage outlets, one at the center and other at the outer chamber. The net egg incubation capacity of the tank is 1,200 liters.
• The fertilized eggs hatch out in 12-18 hrs. and remain in the incubation chamber for 72 hrs. An average water flow of 400 ml sec-1 is required in the incubation tank.
• It has the capacity to hold 10-12 lakh eggs per operation.
• The spawn is collected at the spawn collection chamber through a PVC hosepipe connected from the outlet of the outer chamber.

Egg/Spawn Collection Tank

• The egg/spawn collecting tank is connected to breeding or hatching pool as per the need. It is a rectangular tank of 1.0 m x 0.5 m x 0.5 m with wall thickness of 3-4 mm and water holding capacity of 250litres.
• The water level in the tank is maintained at a height of 0.4 m through an outlet fitted at the upper end of the tank.
• Cotton inner hapa of the same size is fixed inside the tank for collecting spawn/egg from incubation/breeding pool, respectively.

Overhead Water Storage Tank

• FRP water storage tank of capacity 2,000 litres is required to operate the hatchery unit. As per the space availability, two tanks of 1,000 litre capacity each, can solve the purpose.
• The breeding pool and hatching pool are connected to the water storage tank separately or with a common pipe line.
• One 1 HP pump set is required to fill the water storage tank periodically to supply water to hatchery continuously.

Hatchery Operation

The operation procedure of the hatchery is the same as that of an eco hatchery. A temporary shed is required when the hatchery is placed outdoors to avoid direct impact of rain or sunlight.

PORTABLE FRP CARP HATCHERY (10-12 LAKHS/OPERATION)

Another model of portable hatchery is being manufactured by Plasticraft Corporation, Mumbai, which is completely detachable and collapsible and can be easily installed in limited space.

The hatchery system consists of breeding pool, hatching pool and a spawn collecting tank. The size of the medium capacity breeding pool is 8 ft in diameter and 4 ft in height with an overflow outlet of 4 ft length, fitted in the center of the pool.

The hatching pool is of 4 ft x 3ft in size along with a 4 ft long overflow outlet. Both the pools are separately built and stand on aluminium frame. The body of both the pool is made up of aluminium sheet covered by PVC liner. The spawn collection tank is rectangular and made up of fiberglass reinforced plastic. The hatchery can produce 10-12 lakh eggs in one operation.