CATDOLL : CATDOLL: Freshwater silver pomfret farming technology and management

Freshwater silver pomfret farming technology and management

In recent years, a fish that was not common in the past has been added to the common people's tables. This fish has thick meat with few bones and tender texture, and has high edible value and nutritional and health value. Its scientific name is short-capped giant carp, but the common people call it "freshwater white singer", "freshwater prostitute" and "silver prostitute".

Freshwater white shrike is a freshwater fish native to the tropics. It grows fast, has a varied diet, is less susceptible to diseases, is resistant to low oxygen, and is easy to catch. Taking advantage of its fast growth, it can be raised to commercial specifications in areas in my country where the water temperature is 25-30°C for more than three months. Using geothermal water resources or waste water from thermal power plants, steel mills, chemical plants, etc. for breeding can also yield good returns. Therefore, the scale of breeding is constantly expanding. Here we will introduce the breeding technology and management of freshwater white shrike.

1. Pond Preparation

Pomfret has no special requirements for ponds. Common ponds can be used to breed it, but it requires sufficient, clear and pollution-free water sources. Before stocking, the pond should be renovated and disinfected. In winter, the pond water should be drained and bleached in the sun. When dealing with the silt in the pond, water inlets and outlets should be set up, and filters should be made to prevent wild fish from entering and seedlings from escaping. After the pond is renovated, quicklime should be sprinkled throughout the pond for disinfection. Generally, 100 kilograms of quicklime per acre should be used. In addition, aerators and feeders should be prepared.

2. Planting seedlings

Half a month before stocking, add 60-80cm of water, soak tea seed cake in warm water and sprinkle it all over the pond to eliminate the eggs of other fish in the pond, add organic fertilizer and fertilize the water, and when the water color turns yellow-green, you can stock the fry. The fry should be selected with small differences in size, which is conducive to breeding management. Generally, 2000-3000 3cm pomfret are stocked per mu. Before stocking, place them in an environment with a water temperature of about 20 degrees for a period of time. During the temporary breeding, you must do a good job of feeding management, feed some zooplankton or newly hatched Artemia nauplii, feed feed after a week, and after 15-20 days of cultivation, you can put them in the pond for breeding.

3. Feeding

Pomfret is an omnivorous fish with a huge appetite. Therefore, in order to make it grow quickly and achieve high yields, it is usually fed with feed. Soybean meal, fish meal, flour and some nutritional additives are used to prepare granular feed in a certain proportion. Of course, other feeds can also be purchased, but the protein content of the feed must reach 30%-35%. The time and amount of feeding should also be paid attention to. Generally, it is fed once in the morning and afternoon every day, of which the morning accounts for 40% of the total feeding amount, and the afternoon accounts for 60%. The feeding amount should be determined according to the growth status of the fish and the weather and water temperature. The principle of adding more and feeding less should be implemented. The pomfret should be full but not waste feed. In addition, in rainy and hot weather, the feeding capacity of pomfret decreases, so the feeding amount should be appropriately reduced.

4. Daily management

During breeding, we should insist on patrolling 1-2 times a day, mainly to check the changes in water quality, the state of the pool surface, and the growth and activity of fish. The first thing to do is to strengthen water quality management. If the water quality deteriorates, we should inject or change water in time to keep the water fresh. It is better to do a good job of fertilizer and water management to keep the water color in yellow-green or tea-brown. If the color is too dark, it means that the fertilizer and water are excessive. Water should be injected in time to dilute the fertilizer. If the color is dull, organic fertilizer should be applied in time to maintain the state of fertilizer and water. The coverage area of ​​aquatic plants on the pool surface cannot exceed 50% of the total area of ​​the pool surface, and it cannot be distributed too densely to avoid reducing the dissolved oxygen in the water body. If the dissolved oxygen is insufficient, the aerator should be turned on in time to promote the dissolved oxygen in the water body, especially in the summer when the temperature changes. In addition, the residual bait on the pool surface should be removed in time to avoid affecting the water quality. The growth condition of fish is extremely critical. When growing early, they will be invaded by various diseases. Careful observation will be found to find abnormal places of fish, find out the reasons, and prescribe the right medicine to make them grow healthily.