为提高红点鲑的孵化率,掌握鱼苗的适时开食时间,瑞典农业大学养殖系的科研人员对刚孵化出的仔鱼进行了3种不同的处理:(1)将仔鱼放在平铺筛绢的底质上,孵化后9d开始投饵;(2)孵化后34d开始投饵;(3)将仔鱼放在装有砂砾的孵化缸中养殖,出现紧急情况时投饵。试验表明:砂砾底质上放养的仔鱼卵黄囊吸收快,平铺筛绢底质上放养的仔鱼孵化后9d或34d投饵的 In order to improve the hatching rate of red-spot salmon and master the timely opening time of fry, researchers at the Department of Breeding of Agricultural University of Sweden conducted three different treatments on newly hatched larvae: (1) (2) Feeding began 34 days after hatching; (3) The larvae were raised in a gravel-packed hatchery and fed in emergencies. The experiment showed that the yolk sacs of the larvae stocked on the gravel sediment were fast absorbed and the larvae stocked on the tilapia-silk substrate were incubated for 9 days or 34 days after hatching