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渔农说:“鱼苗要健壮,养鱼才能旺。”实践证明,只有优选买到健壮的鱼苗,才能保证存活率高、生长快、多增产、多收入。其识别鱼苗是否健壮,方法是: 一、口吹观察法:将鱼苗盛入盆中,用嘴适当吹动水面。凡能顶风逆水游动者为健壮鱼苗;若不能顶水,只能随波逐流者为弱质鱼苗。 二、倒水观察法:把鱼苗舀在盆中,徐徐将水倒入。凡在盆底强烈挣扎、头尾弯曲成圈状者为健壮鱼苗;若贴于盆底,挣扎无力,仅头尾稍能扭动者为弱质鱼苗。
Farmers and fishermen said: “fry should be robust and fish can be flourishing.” Practice has proved that only the preferred to buy a robust fry in order to ensure high survival rate, rapid growth, more yield, more income. The fry is to identify its robustness, the method is: First, the mouth blowing observation method: the fry Sheng into the basin, the mouth properly blow the water. Where the wind and water to swim against those who are vigorous fry; if not top water, only with the crowd of weak fry. Second, water observation method: the fry scoop in the pot, slowly pour the water. Where the strong struggle at the pelvic floor, curved head and tail into a loop fringe fry; if affixed to the pelvic floor, struggling weakness, only a little head and tail twist to weak fry.