China is one of the major producers of cultured shrimp, and Litopenaeus vannameidominates shrimp aquaculture in china. Since the early 1990s, shrimp industry has beensuffering from serious viral disease problems. With the overuse of the drugs and chemicalsfor preventing and reducing the lose from the disease, it resulted in some residue problems.During the efforts to find solutions to the disease problems, it was gradually perceived thatstocking with SPF postlarvae and high healthy shrimp aquacul...
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