鱼类饲养的目的,最终是通过起捕而供应市场,给人们食用。鱼类的起捕是鱼类饲养过程中最繁重的操作之一。因为一般起捕池塘中饲养的鱼类都是在秋、冬季节,气候条件较差。在大型的养殖场中在短短的时间里要起捕、转运上市数百吨商品鱼,工作量是很大的。而起捕时间的长短往往取决于机械化的水平。机械设备较差的养殖场,势必要提前开捕,以便在封冻以前结束.这样就会缩短鱼类的肥育期,所以机械化起捕鱼类是种积极性养殖设备,它也是影响鱼产量提高的 The purpose of fish farming is ultimately to market by catching up for human consumption. Fish catch is one of the most difficult operations in fish farming. Because of the general catch of fish ponds are in the autumn and winter seasons, poor weather conditions. In a large-scale farms in a short period of time to catch, transfer hundreds of tons of fish market, the workload is great. The duration of catching up often depends on the level of mechanization. Farms with poor mechanical equipment are bound to be pre-catched so that they can finish before freezing, which will shorten the period of fish finisher, so mechanized catching of fish is a kind of positive breeding equipment and it also affects fish production.