与养殖罗氏沼虾、南美白对虾等相比,养殖青虾的苗种投入少、收购价格稳定、养殖风险小,青虾养殖规模不断扩大以及集约化程度日益提高,但青虾近亲养殖情况日益严重,这样给生产上带来的问题:一是性早熟的青虾生长缓慢,营养积累到性腺发育上,商品虾规格偏小,上市价格低,直接影响经济效益;二是性早熟的青虾大量繁殖仔虾,使池塘内青虾养殖密度迅速增大,仔虾和成虾争食、争氧、争空间,导致成虾规格上不去,商品价格大 Compared with farmed Macrobrachium rosenbergii and Penaeus vannamei, the cost of breeding shrimp is low, the purchase price is stable, the risk of breeding is low, the scale of shrimp farming is expanding and the degree of intensive farming is increasing day by day. However, Serious, so give birth to the problems: First, the precocious prawn growth is slow, the accumulation of nutrients to the gonadal development, commodity shrimp size is small, the market price is low, a direct impact on economic benefits; Second, precocious prawn Large numbers of breeding larvae, pond aquaculture density of freshwater shrimp increased rapidly, larvae and shrimp fight food, oxygen, space competition, resulting in shrimp specifications do not go up, commodity prices