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罗非鱼是我国引进推广比较成功的淡水养殖品种之一,但由于养殖规模的迅速发展,越冬苗种的需求增大、种质退化、全雄率不高等矛盾突出地表现出来,成鱼早熟、过度繁殖使得大量低值幼鱼争夺饵料和空间,严重影响了成鱼产量、品质(规模不整)及养殖效益的提高。通过投放部分食鱼的凶猛鱼类(乌鳢),控制罗非鱼幼鱼的生长,并将其转化成高档经济鱼类是解决这一矛盾的有效措施之一,为此,2001年我们利用4口池塘进行了这方面的试验,现将试验方法和结果总结如下,以供同行参考。
Tilapia is one of the most successful freshwater aquaculture species introduced and popularized in China. Due to the rapid development of aquaculture, the demand for overwintering seedlings has increased, and the contradiction between germplasm degeneration and the entire male population has become increasingly prominent. , Overproduction of a large number of low-value juveniles compete for food and space, seriously affecting the adult fish production, quality (size) and breeding efficiency. Controlling the growth of tilapia juveniles and putting them into high-end economic fish is one of the effective measures to solve this contradiction by putting on some of the ferocious fish that feed on fish (jackal), so in 2001 we used 4 I conducted a test pond in this area, the test methods and results are summarized below, for peer reference.