制备一种提高鱼苗存活率的制剂,原料为螺旋藻Spirulina、颤藻Oscillatoria和蓝藻Cyanophyceae。该制剂可减少幼鱼在养殖期因弧菌、链球菌引起的疾病造成的死亡。如:20000条黄尾狮(yellowtail)幼鱼,平均体重约20g,等分成两组。一为对照组,仅喂饲基本食物(碎沙丁鱼末);另一为研究组,喂饲掺入1％螺旋藻的基本食物,从六月中至八月中,一日二次达两个月。喂食含螺旋藻饲料组在整个养殖期的死亡率均低,累积为25.2％,而对照组 A preparation for improving the survival rate of fry was prepared by using Spirulina, Oscillatoria and Cyanophyceae as raw materials. The preparation can reduce the mortality caused by diseases caused by vibrios and streptococcus during the breeding period of juveniles. For example: 20,000 yellowtail yellow juveniles, average body weight of about 20g, equally divided into two groups. One was a control group, fed only basic food (ground sardines end); the other was a study group fed with 1% spirulina mixed with basic food, from mid-June to mid-August, up to two month. The mortality rate of feed with spirulina diet group was low during the whole farming period, with a cumulative 25.2%, while the control group