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目前,在世界范围内对商品鱼的养殖已引起各渔业国的普遍重视。据联合国粮农组织预测,到2000年可达400万吨,即比现在的产量提高5倍。据报道增加池塘养鱼产量主要有三个途径:扩大养殖面积,强化生产和采用工厂化养鱼。 在欧洲,匈牙利到1994年池塘养鱼增加了0.8倍,波兰增加了0.7倍。在亚洲,特别是日本,近四年来养鱼产量增加了四倍。菲律宾近三年增加32％,在池塘养殖业中广泛推广多品种混养法。据报道鲤鱼与植物性鱼类混养能增加池塘鱼产量25—30％。在欧洲。鲤鱼池塘中的补充鱼类是利用清水鲑、白鲑(捷克)、真鲶、棱鲈鲻(保加利
At present, the worldwide commercialization of commercial fish has attracted the universal attention of all fishery countries. According to the UN Food and Agriculture Organization predicts that by 2000 up to 4 million tons, which is 5 times higher than the current output. It has been reported that there are three main ways to increase fish production in ponds: expanding the area of farmed fish, enhancing production and using factory-built fish culture. In Europe, fish ponds in Hungary increased by 0.8 times by 1994 and by 0.7 times by Poland. In Asia, especially Japan, fish production has quadrupled in the last four years. The Philippines has seen an increase of 32% in the last three years and has widely promoted multi-species polyculture practices in pond aquaculture. It has been reported that carp and plant fish polyculture can increase pond fish production by 25-30%. in Europe. Supplementary fish in carp ponds are made from freshwater salmon, whitefish (Czech), true catfish,