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无论淡水池塘养殖还是海水池塘养殖南美白对虾,放养大规格南美白对虾仔虾,可以有效提高成活率。这就要求育苗场要为养殖户提供大规格南美白对虾苗种。一般情况下,规格至少达到1．2cm。但在室内培育条件下,此规格南美白对虾仔虾也是暴发红体病的危险期,病状发生后,不仅每个池内虾苗病情传染速度快,而且池与池之间如不严格控制,稍有不慎,即造成全军覆灭,给育苗生产单位带来重大经济损失。据不完全统计,2006年仅唐山市丰南区至少80%以上的育苗场或多或少
Regardless of freshwater pond culture or seawater pond culture of P. vannamei, stocking large size Penaeus vannamei shrimp, can effectively improve the survival rate. This requires hatcheries to provide farmers with large-sized white shrimp species. Under normal circumstances, the specification of at least 1.2cm. However, under indoor cultivation conditions, this specification Penaeus vannamei is also a dangerous period of outbreak of red body disease, the symptoms occur, not only in each pool shrimp disease transmission rate is fast, but not strictly controlled between the pool and the pool, slightly Inadvertently, that caused the annihilation of the entire army and brought significant economic losses to the nursery production units. According to incomplete statistics, only more than 80% of the nurseries in Fengnan District in Tangshan City in 2006 were more or less