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根据各地历史习惯,冬季食用鱼起水后,即要进行清塘消毒,放养鱼种。一般要求在春节前后半个月内放养完毕。因此时水温低,鱼种的活动能力弱,在捕捞和放养过程中不易受伤,可减少发病率和死亡率。但应做到以下“五不放”: 一、体弱、病、伤、残的鱼种不放。要选择那些背部肌肉丰满,色泽鲜艳,鳞片、鳍条完整,溯水性强,体表没有寄生虫和伤痕的鱼种放养。二、没有注射免疫疫苗的(草)鱼种不放。实践证明,草鱼出血病疫苗不仅对草鱼的出血病有很好的预防作用,同时对草鱼烂鳃、肠炎、赤皮病等有很好的预防效果。注射了疫苗的草鱼种成
According to historical traditions throughout the world, winter edible fish starts to be disinfected and stocked with fish. Generally require the stocking within half a month before the Spring Festival is completed. Therefore, when the water temperature is low, species activity is weak, not easy to be injured in the process of fishing and stocking, can reduce morbidity and mortality. But should do the following “five do not let go”: First, frail, sick, injured, disabled species of fish. To choose those fullness of the back muscles, bright color, scales, fin complete, strong water repellency, surface without parasites and scars of fish stocking. Second, there is no injection of vaccines (grass) species of fish hold. Practice has proved that grass carp hemorrhagic disease vaccine not only has a good preventive effect on the bleeding of grass carp, but also has good preventive effects on grass carp gill, enteritis and red-skin disease. Inoculated with grass carp vaccine