Factory-scale farming technology of Penaeus vannamei

Factory-based farming has very high requirements for nutrition and technical management, and is very suitable for the farming of whiteleg shrimp , with a short farming cycle, low investment and high economic returns. Below, I will introduce the factory farming technology of whiteleg shrimp . Let’s take a look.

1. Seedling selection

The smaller the individual differences in the same batch of shrimp seedlings , the more uniform the specifications, and the larger the individuals, the better. High-quality shrimp fry are sturdy, have good transparency, long abdominal segments, fully stretched tail fans, and clean, smooth bodies free of dirt. Hold a handful of shrimp seedlings in your hand. Those that scatter quickly when you release your hand are high-quality and strong seedlings, while those that do not are weak seedlings with poor vitality.

2. Temperature management

The suitable growth temperature for whiteleg shrimp is 28-31℃. Shrimp are relatively sensitive to temperature, so try to keep the temperature stable and avoid drastic temperature changes within the suitable range for their survival.

3. Water quality requirements

To ensure good water quality, water used in factory farming must undergo strict filtration, disinfection and oxygenation treatment, and the water quality must be stable. In the later stages of aquaculture, water quality regulation becomes increasingly difficult and water quality indicators can only be fine-tuned but not drastically changed, otherwise the shrimp will become stressed and become ill or die.

4. Feeding management

It is recommended to choose feed with appropriate crude protein content to meet the nutritional requirements of shrimp growth rate. In factory-farmed shrimp farming, the general method of feeding is granular feed + fresh bait. After the second seedling separation, the shrimps are generally fed 6 meals, once every 4 hours. When checking the feed, pay attention to the health status and eating habits of the shrimps, increase or decrease the amount of feed appropriately, strictly control the feeding time, and discharge sewage to the bottom in time after eating, so as to reduce the pollution of the water body by leftover bait and feces, especially the pollution of fresh bait, and reduce the reproduction rate of bacteria and parasites .

5. Enhance oxygenation

The stocking density of factory-scale shrimp farming is high, so the dissolved oxygen must be sufficient and always not less than 5 mg/L. Air stones are laid on the bottom of the pond to increase oxygen. Two air stones are placed in 1 square meter, and the air stones are 10cm-15cm away from the bottom of the pond to ensure that the pond is not polluted. The specifications of a single pond are 6×6m, and there are 30 ponds in total. They are equipped with an 11kw Roots blower to fully guarantee the dissolved oxygen demand in the middle and late stages.

6. Supplement mineral nutrition

The number of shrimps in factory-farmed shrimp farming is relatively large in the middle and late stages. In addition, factory-farmed shrimps molt frequently, generally 2-3 times a day. This is different from shrimp farming in outdoor ponds. Although the amount of calcium, magnesium, zinc, iron and other mineral trace elements required for shrimp growth and molting is relatively large. It is recommended to supplement minerals every evening to allow the shrimp to molt and harden their shells smoothly, prevent soft-shelled shrimp from dying due to high levels of sub-salt, prevent Vibrio infection caused by weak constitution, and reduce the risk of being eaten by leftovers during molting. In addition, large-scale water changes can also cause stress-induced molting in shrimp, so minerals and trace elements should also be appropriately supplemented.

The above is the factory farming technology of whiteleg shrimp. Factory farming of shrimp takes up less space, has high yield and good benefits, and can reduce shrimp diseases and water pollution caused by traditional shrimp farming methods.