1. How much is the price of Penaeus vannamei per catty?
Penaeus vannamei is a kind of shrimp with high nutritional value, and it is also a common delicacy on our table. At present, the price of Penaeus vannamei in the market is generally 50-60 yuan a catty. Due to the different farming conditions in different places, the market conditions are also different.
However, with the decrease of the price of Penaeus vannamei, the main species of shrimp cultured in 20 19, the enthusiasm of shrimp farmers for its culture has decreased.
For shrimp farmers, the prospect of sustained low market price in 20 19 is still a huge challenge. They are still very conservative and have not decided on the crop plan for 20 19.
2. What are the secrets of Penaeus vannamei culture?
1, high-quality seedlings
Many times in the market, prawns are not well raised, and many farmers will blame this fry for the first time, which shows the importance of fry to successful breeding, so it is also recommended that you choose high-quality fry for breeding.
2, strong seedlings, seedling protection
Choosing high-quality seedlings and reasonable stocking density, we should protect the seedlings well, only when there are seedlings can we keep them alive, and only when there are seedlings in the middle and late stage can we control the water body and have seedlings can we produce.
3. Scientific feeding
The bait can be full-price palatable compound feed, small miscellaneous fish, snail meat and so on. Penaeus vannamei has a high requirement on protein, which is to ensure that the prawns are full and eat well, but also to take into account the culture environment and reduce the feed cost. Therefore, the bait should be granular feed with good brand and high quality. In the early stage of Penaeus vannamei culture, No.0 broken granular feed, No.2 1 feed in the middle stage, No.2 and No.3 feed, snail meat and so on, and it is best to use puffed granular shrimp feed.
The feeding amount should be determined according to the shrimp size, survival rate, water quality, weather, feed quality and other comprehensive factors, and the production practice experience is very important. A feeding table should be set up in the pond, and it should be checked and observed regularly (once every 10 day) and adjusted in time. When feeding, we should adhere to the principle of "four-fixed", that is, the shrimp's body length should reach 3 ~ 10cm in the middle period of culture, and the daily feeding amount should be 6% ~ 8% of the shrimp's wet weight, and the shrimp's body length should be above10 cm in the late period of culture, and the daily feeding amount should be 4% ~ 5% of the shrimp's wet weight. In the early stage of culture, feed twice a day at 7: 00 and19: 00 respectively; Feeding time was 7: 00,19: 00 and 23: 00 for three times in the middle and late stage of culture, and the feeding amount in the evening accounted for 50% of the daily feeding amount. Throw it in the deep water along the pool beach during the day and in the shallow water in the evening, with the principle of eating it 2 hours after feeding.
4. Patrol the pond
Patrol the pond three times a day in the morning, evening and midnight to observe the change of water color and whether the prawns have floating heads. The activity and growth of prawns were examined by observing with light and fishing net. If there is any abnormality, the feeding amount should be adjusted, and it is found that the floating head can start the aerator.