鱼种在出塘前必须要进行拉网锻炼,因为拉网使鱼受惊,增加运动量,可使肌肉更结实。同时幼鱼在密集过程中会分泌粘液和排出粪便,增加耐缺氧适应力;在运输中并可避免排泄出大量粘液和粪便污染水质,因而有利于提高运输成活率。1鱼种拉网锻炼第1次拉网:将鱼慢慢地赶集在网中,提起网 The fish species must be pulled nets before the pond exercise, because pull the net so that the fish scared, increase physical activity, can make muscle more solid. In the meantime, juveniles will secrete mucus and excrement in the intensive process, increasing the resistance to hypoxia; during transportation, it can avoid excreting a large amount of mucus and excrement to pollute the water quality, thereby being beneficial to improve the transportation survival rate. 1 fish pull net exercise the first pull net: the fish will be slowly collected in the net, filed network