Factors such as low success rate of P. vannamei culture and environmental degradation

In 2019, the culture environment of Litopenaeus vannamei is the same as in previous years. The eutrophication of the sea area has not been improved. The abnormal climate and serious diseases have caused the low success rate of breeding. According to reports, the success rate in many areas is less than 20%. The reduction of customs duties on imports of aquatic products and rampant smuggling. The impact of the domestic shrimp on the international market has caused shrimp prices to be 5-6 yuan/market kg lower than in previous years. The shrimp farming industry in South America is worse than ever. Many countries have already developed shrimp farming on a large scale. It is reported that countries such as Indonesia, Vietnam, Thailand, Egypt and other countries have continuously expanded the area of shrimp farming, and many of them are newly developed areas, with few diseases and high breeding success rate (such as Indonesian shrimp farming, many The success rate of households can reach ...