一、概论鱼贝甲壳类,终生或在早期幼体阶段,都要食硅藻、小球藻,轮虫和鹵虫等生物饵料。所以苏联、日本等一些国家,都曾大力开展人工培育仔稚鱼和贝甲壳类幼体用生物饵料的工作。但因为人工培育生物饵料容易遭受各种自然条件的影响,产量很不稳定,远远不能满足生产上的需要,而且,培育生物饵料还需要庞大的设备和很多劳动力,所以价格也很昂贵,另外,由于营养成分不完全,还会引起仔稚鱼的畸形或大量死亡,例如根据日本的资料,用面包酵母培育出的轮虫来饲养鱼苗时,由于轮虫中缺乏必需脂肪酸,常导致鱼苗体色发黑和食欲减退,最后 First, an overview of fish shell crustaceans, life or in the early larval stage, have to eat diatoms, chlorella, rotifers and Artemia and other biological feed. Therefore, some countries, such as the Soviet Union and Japan, have vigorously carried out the work of artificially cultivating fish and shellfish larvae with biological feed. However, artificial breeding of biological feedstuffs is easily affected by various natural conditions, the yield is very unstable and far from meeting the needs of production. In addition, the cultivation of biological feedstuffs requires huge equipment and a lot of labor, so the price is also very expensive. In addition, Due to incomplete nutrition, deformity or mass death of larvae can also be caused. For example, according to the Japanese data, when bivalve rotifers are used to breed fry, the lack of essential fatty acids in rotifer usually leads to fry Black hair and loss of appetite, and finally