水蚤、水丝蚓、蚯蚓等是一些鱼类、蛙类、河蟹的优良活饵料,如新鲜蚯蚓的蛋白质含量达40%,干蚯蚓的蛋白质含量达70%以上,能加速这些鱼类、蛙类、河蟹幼体的生长发育,也是这些幼体的必须饵料。养殖生产中,天然活饵料不足,可用人工培育法解决。人工培育水蚤、水丝蚓和蚯蚓的方法简便,养殖场、专业户、个体户都可进行。 Daphnia, earthworms, earthworms and the like are excellent live bait for some kinds of fish, frogs and crabs. For example, the fresh earthworm has a protein content of 40% and dry earthworm has a protein content of over 70% Class, crab larvae growth and development, but also these larvae must feed. Aquaculture production, lack of natural live feed can be artificial cultivation method to solve. Artificial cultivation of water fleas, earthworms and earthworms simple method, farms, specialized households, individual households can be carried out.