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一、优质虾苗的标准1.选用无特定病原体(SPF)种虾繁育的虾苗用无特定病原体种虾繁育的虾苗发病率低,是生产中首选的虾苗。不过引进的SPF种虾经几代繁育后抗病力将会下降,应作必要的更新。2.规格适中南美白对虾无节幼体长成仔虾需12天以上,仔虾再经过10天培育后即可出售,此时的
First, the standards of high-quality shrimp 1. Selection of species-specific pathogens (SPF) shrimp breeding shrimp without specific pathogen shrimp breeding low incidence of shrimp production is the preferred shrimp. However, the introduction of SPF species of shrimp after generations of disease resistance will decline, should make the necessary updates. 2. Moderate size Penaeus vannamei nauplius grow into larvae need more than 12 days, larvae and then after 10 days of cultivation can be sold, this time