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1.鱼苗质量差由于近年来繁殖用亲鱼严重退化,鱼苗质量普遍下降。因此,要重视亲鱼的淘汰更新和提纯复壮工作,从根本上解决鱼苗质量问题。 2.鱼苗池过大过深 面积大易形成风浪,鱼苗易随风浪与池壁碰撞,影响成活率;水位深,水温难以提高,抑制了鱼苗生长。鱼苗培育池一般面积2～4亩,深1～1.5 m。
1. The fry quality is poor due to the serious degeneration of broodstock in recent years, fry quality generally declined. Therefore, we must pay attention to the elimination of the broodstock to update and purify rejuvenation, a fundamental solution to the quality of fry. 2. The fry pond is too large and too large in depth and easy to form a storm. The fry is easy to collide with the wall due to stormy waves and affects the survival rate. The water level is deep and the water temperature is difficult to increase, which inhibits the fry growth. Fish fry pond general area of 2 to 4 acres, deep 1 ~ 1.5 m.