(一)彻底消除敌害一些水库放养鱼种前,没有彻底消除敌害鱼类,年长日久,凶猛鱼成群,大量追食其他鱼种。加之蛇、鼠等其他鱼类天敌危害,势必影响水库中鱼的回捕率与产量。因此,放养鱼种前,要利用枯水库节,用药物进行全水库除害。 (A) the total elimination of predators Some reservoirs stocking fish before, did not completely eliminate predatory fish, long time, ferocious flocks, a large number of other food species. Coupled with snakes, rats and other natural enemies of fish hazards, will inevitably affect the recovery of fish in the reservoir yield and yield. Therefore, stocking fish species, we must use the dry reservoir section, the whole reservoir with drugs to remove harmful effects.