据调查,小型水库养鱼生产由于技术、管理等原因,常会出现回捕率低,经济效益不佳等情况。要提高小型水库养鱼回捕率,可采取以下措施。1.彻底消除敌害某些水库在放养鱼种前,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 According to the survey, due to technical, management and other reasons, the production of fish in small reservoirs often shows a low recovery rate and poor economic benefits. To raise the recovery rate of fish in small reservoirs, the following measures can be taken. 1. Complete Elimination of Hostile Creatures Some reservoirs did not completely eliminate predatory fish species before they were stocked. They were flocks of ferocious fish in large numbers and fed on a large number of other fish species. In addition, other reservoirs of natural enemies, such as snakes and rats, were endangered , Is bound to affect the water