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苗种质量的优劣是决定能否高产高效的关键条件之一,所以购买苗种要严把质量关,下面浅谈作者在生产实践中的几点体会。1鱼苗质量优劣的鉴别 优质鱼苗:在容器内,将水搅动产生漩涡,优质鱼苗在漩涡边缘逆水游泳;舀在盘中的鱼苗游泳活泼,身体洁净;口吹水面,鱼苗逆水游泳,倒去水,鱼苗留在盘底剧烈挣扎。头尾弯曲呈圆圈状。 劣质鱼苗:在容器内将水搅动使产生漩涡,劣质鱼苗大部分被卷入漩涡;舀在盘中的鱼苗游动迟缓或伏于水底,鱼体拖带污泥;口吹水面时,鱼苗顺水游动;倒去水后挣扎力弱,头尾勉强扭动或不能扭动。
The pros and cons of seed quality is to decide whether one of the key conditions for high yield and efficiency, so the purchase of seed to strict quality control, the following talk about the author in production practice experience. 1 quality fry identification of high quality fish fry: in the container, the water stirred whirlpool, high-quality fry swim against the edge of the whirlpool swirl; scoop fry swimming in the dish lively, clean body; mouth blowing water, fry swim against the water, down Water, fry stay in the bottom of the plate intense struggle. Head and tail curved in a circle. Low-quality fish fry: the water stirred in the container to produce vortex, most of the low-quality fry are involved in the whirlpool; scoop in the plate of the fry swimming slowly or volts in the water, fish dragging the sludge; Move; poured into the water after struggling weak, head and tail barely twisted or can not twist.