南美白对虾高效生态养殖技术（Efficient ecological culture technique of Penaeus vannamei）.doc

南美白对虾高效生态养殖技术（Efficient ecological culture technique of Penaeus vannamei） Have diseases occurred in the course of seedling raising? Have you ever used antibiotics to raise seedlings?. (3) whether the seedlings are slow or weak. (4) feed types used in raising seedlings. Chirocephalus, Prawn Crackers, or ordinary shrimp feed. This is the background of the nursery. If these conditions are difficult to grasp, with the naked eye from the following aspects: (1) to determine whether the specifications were neat, specifications in 0.8 - 1.2cm. (2) the optical test beaker, showed jumping shrimp swimming, jumping powerful tentacles together, occasionally open, snatch ability, tail fan open big radian. (3) the body surface is clean, the limbs are intact and the body is elongated. There are no dead seedlings or sick seedlings in the nursery. (4) with white bailer scoop, can quickly sink into the ladle bottom stirring water by hand, cruising, shrimp swimming against the border, fast and powerful. (5) the wet towel part into the shrimp dry, reoccupy wet towel cover for 15 minutes, put the towel on shrimp washed into the pot, let it slowly recovered, the survival rate in more than 95%, indicating strong activity of shrimp. 2. shrimp stocking density In the pond under the condition of Penaeus monodon from 5 to 80 thousand per acre stocking tail, P.vannamei Mu 8 - 100 thousand in the case of the middle tail, cultivation, can be stocked per mu 150 thousand tail. In the low pool culture: Penaeus japonicus is stocked with L - 30 thousand tail, and Penaeus vannamei is stocked with 3 - 50 thousand tails per mu, and the Japanese prawn is stocked with L - 15 thousand tail. 3. freshwater ponds on the shrimp technique Freshwater ponds of Penaeus vannamei shrimp, the first to be downplayed. Down to 3 per 1000 - 5 per thousand in the shrimp farm, desalination project should be gradual, cannot act with undue haste. At the same time, a temporary pool was set up in the culture pond. The concrete