人工开口饲料饲养鲤鱼苗的初步试验

A PRELIMINARY EXPERIMENT ON PREPARED FEED FOR EARLY LARVAE OF COMMON CARP

为了解决冬季培育鲤鱼苗的饲料问题,从1981年冬开始,对鲤鱼苗的人工饲料进行了一系列的研究。1983 年初研制成功“5号”人工开口饲料。用这种饲料直接喂养鲤鱼苗,可使其成活及正常生长。在鱼苗放养密度分别为20万尾/米~3和10万尾/米~3,水中不含饵料生物的条件下,经过15天饲养,鱼苗体长分别可达到11—13毫米,体重可达 15—22毫克,成活率为77—97％。5号饲料的成份为;粗蛋白36.7％,粗脂肪5.5％,粗纤维1.8％,水分8％,灰分19.0％,碳水化合物29％。

A series of studies on prepared feed for fry of common carp had been proceededsince the winter of 1981. For the purpose to raise carp larvae and fry in winter, anavailable prepared feed Larvstart-5 had been developed in 1983. This prepared feedenhanced the growth and survival rate of common carp during the early larval stage.At the densities of 200,000 larvae/m^3 and 100,000 larvae/m^3 rearing for 15 days, thefry can grow to 11--13 mm in length and 15--22 mg in weight respectively, solelyrelying on Larvstart-5 in complete absence of nature food. The survival rate of larvaewas 77--97%. The composition of prepared feed Larvstart--5 is as follows: crudeprotein 36.7%, crude fat 5.5%, fiber 1.8%, ash 19%, water 8% and carbohydrate19%.