Set up the nursing tank for Shrimp Broodstock

In order to produce quality shrimp and ensure productivity, the establishment of tank and equipment is the first important requirement to help the operation of the hatchery operate effectively.

Set up the nursing tank
Depending on the size and capacity of the hatchery to meet the design requirements of the site and the location of the camp accordingly. At present, there are many types of shrimp hatchery model design with various materials such as composite, concrete, brick … At the beginning of construction, farmers also have to choose the location of construction Appropriate and secure requirements in accordance with state regulations.
In particular, the primary factor that was initially considered was the seawater supply system. Using seawater for seed production must have a salinity of not less than 28 ‰ and no major fluctuations in the year. Clean water source, no color, odor, unusual taste. Other physical and chemical indicators of water sources must comply with regulations. The sea water supply system consists of three main components: the introduction of seawater from the farm, the use of filtered water and seawater tanks.

At present, some shrimp-producing establishments like Nam Mien Trung use offshore water carriers to reduce the cost of chemicals and to avoid polluted water sources. Salinity directly from the sea to the hatchery should therefore be aware of the following issues: The location of the water should lie below the lowest net water level, at least 2 m below sea level at the time of water Net and 3 m higher than the sea floor; The seawater reception facility is kept quiet at a fixed location and is covered by metal mesh to prevent animals and objects from entering. Water must be carefully filtered to remove waste, garbage … Depending on the quantity and the substance to be removed, the farm may use different filtration methods: bag filtering; Filter by pressure filter; Filter by tank … before putting into the basin’s tank system.

In the shrimp hatchery, apart from the working quarters, laboratories, machine rooms and warehouses, the farm should have several tanks used for different purposes for seed production: sedimentation tanks; Treatment tank, water supply; Shrimp broodstock; Spawning tank; Algae tank; Hatchery; Larval rearing tank; Artemia tank and shrimp tank. The general requirement for tanks is that the bottom of the tank must be low towards the drainage, bottom and around the tank wall to be smooth.

Sedimentation tanks, water purifiers: These two tanks should be large in volume and placed in a high position to facilitate the storage of water and water to other tanks are convenient. The settling tank should be built near the filter tank, adjacent and continuous to the water treatment tank. The tank must have a roof, rectangular or rectangular. The tank must have the required volume to accommodate the amount of water supplied to the farm.

The broodstock: Must be placed indoors to avoid direct sunlight, windows are arranged appropriately to distribute light evenly, avoiding rain affecting shrimp. The tank has a circular shape to create continuous water movement around the tank and to limit shrimp damage during the racquet handling process. The height of the tank is usually 1 – 1.2 m; The floor must be cemented, easy to drain and sanitize, disinfect; The tank must have the capacity appropriate to the number of shrimps for delivery. In each tank is installed drainage pipes to control the water level in the tank.

Incubation tank and shrimp larvae: Must be indoors. For incubation tanks should be covered light until the eggs hatch and usually have a circle or square; Platelet tanks need to avoid strong light which is harmful to the larval growth and survival rate, especially during the Nauplius and protozoa stages. Normally, the larval rearing tank has a quantity of 2 – 4 tanks, with a capacity of about 5 m3 per tank, each containing a drainage pipe to control the water level and facilitate larval harvesting.

Algae aquariums: Ensure hygiene and sterility, avoid contamination, affect the quality of algae. Algae-like storage houses are equipped with air conditioning, neon lights, aerators. The aquarium is located outdoors and has an aerator installed; The farm produces 3 to 4 algae tanks, measuring 1.5×1.5×1.4m.

Aquarium Artemia: Must be covered; The shelter has windows that are arranged reasonably to distribute light evenly; Tank height is usually 1.1 – 1.2 m; The tank is conical, transparent bottom, so that when Artemia hatches can be separated from the shell; The tank has a capacity of 0.2 – 1 m3; The foundation of the Artemia larvae tank must be cemented, easy to drain, easy to clean and disinfect.

Shrimp Rafts: Set outdoors according to natural light for shrimp to grow, but the surface should be covered and shielded carefully to avoid harmful factors for shrimp. The tank is about 0.6 – 1 m deep, depending on the amount of shrimp in the tank.

Waste water treatment tanks: Underground construction and design according to the principle of quick drainage without stagnation in the production process and at least 15m far from the production area; Before discharging directly into the environment, sedimented and sterilized water must be of a capacity not less than 25% of the total volume of broodstock and larval rearing tanks (usually 5x3x1, 2 m). Wastewater treatment must ensure the collection of water from all sources that need to be discharged and do not pollute the production. Waste water must be disposed of properly as required.

Equipment in the hatchery:
For the operation of shrimp hatcheries to be effective and secure, the facility should be fully equipped with equipment and tools including water pumps with a capacity of 15-20 m3 / h or 2-3 m3 /hour; water pipe; Valves of all kinds; Complete electrical system, standby generator with capacity of 3 kW / h; Air compressor or compressor 0.5 – 1 HP, air duct; Grids of all mesh sizes of 10-20, 125, 220, 300, 500 μm; Washing machine; Blender for food for larvae; Measuring and regulating devices such as gas meters, water sour meters, salinity meters, pH meters, thermometers, microscopes, nitrate measuring instruments, chlorine, water hardness etc. ; Other tools such as scales, oxygen, brass, bucket, shovel, glass, PVC pipe …

It should be noted that equipment and tools used for shrimp seed production facilities must be made of non-rustic, non-toxic, easy to clean and disinfectant materials. Specialized tools must be used for each purpose, each type of tank and each manufacturer.

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