1. How much is 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 per catty. Due to the different breeding conditions in different places, the market conditions are also different.
However, with the decrease of the price of Penaeus vannamei, the main variety of 20 19 shrimp culture, the enthusiasm of shrimp farmers for its culture has decreased.
For shrimp farmers, the prospect of continued low market price of 20 19 is still a huge challenge. They are still very conservative and have not decided on the crop plan of 20 19.
2. What are the secrets of Penaeus vannamei culture?
1, high quality seeds
In many cases, prawns are not well raised in the market, and many farmers will blame this kind of fry for the first time, which shows the importance of fry to the success of breeding, so it is also recommended that you choose high-quality fry for breeding.
2, strong seedlings, seedling protection
Select high-quality seedlings, reasonable stocking density, protect seedlings well, only seedlings can keep alive, only seedlings can control the water body in the middle and late stage, and only seedlings can produce.
Step 3 feed scientifically
The bait can be full-price palatable compound feed, small miscellaneous fish, snail meat, etc. Penaeus vannamei has a high requirement on protein of feed, so it is necessary to ensure that the prawns are full and eat well, but also to give consideration to the breeding environment and reduce the feed cost. Therefore, the feed should be granular feed with good brand and high quality. In the early stage of Penaeus vannamei culture, the crushed granular feed of No.0 should be used, the feed of 1 should be used in the middle stage, and the feed of No.2 and No.3 and snail meat should be used in the later stage. It is best to use expanded granular shrimp feed.
The feeding amount should be determined according to the size, survival rate, water quality, weather, feed quality and other comprehensive factors of shrimp, and the practical experience in production is very important. A feeding platform should be set in the pond, which should be checked regularly (once every 65,438+00 days) and adjusted in time. We should adhere to the principle of "four decisions" when feeding. The shrimp body length should reach 3 ~ 10cm in the middle period of culture, and the daily feeding amount should be 6% ~ 8% of the shrimp wet weight. The length of shrimp should be above 10 cm in the later stage of culture, and the daily feeding amount should be 4% ~ 5% of the wet weight of shrimp. Feed it twice a day at 7: 00 and 19: 00 in the early stage of breeding. Feeding time was 7: 00, 19: 00 and 23: 00 in the middle and late stage of culture, and the feeding amount at night accounted for 50% of the daily feeding amount. Throw it in deep water along the pool beach during the day and in shallow water at night. The principle is to eat it after feeding for 2 hours.
Step 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. Observe the activity and growth of prawns with lights and fishing nets. If there is any abnormality, the feed rate should be adjusted, and it is found that the floating head can start the aerator.