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罗非鱼具有适应性强、食性广、生长快、肉味美等优点,目前已成为世界上最广泛的养殖对象之一,也是提高我省池塘养鱼单位面积产量的一个重要搭配品种。然而,由于罗非鱼自然增殖能力极强,仔鱼自孵出后约90天就可达首次性成熟,尔后每30—35天繁殖二次,在我省一年可繁殖3—5次。以这样高的繁殖速度必然导致鱼池中罗非鱼苗种密度过大,增高耗饵量和耗氧量,影响鱼类生长甚至危及生存,使之出池规格不整齐,降低商品鱼的合格率,从而影响经济效益。为了摸索控制鱼池中罗非鱼苗种密度过大的易行
Tilapia has the advantages of adaptability, wide feeding, fast growth, delicious meat and so on. It has become one of the most extensive breeding objects in the world and is also an important collocation variety for improving the unit area of fish culture in ponds in our province. However, since tilapia have extremely high natural reproductive capacity, larvae reach sexual maturity for about 90 days after hatching. They reproduce twice every 30-35 days and 3-5 times a year in our province. To such a high rate of propagation will inevitably lead to fish pond tilapia seed density is too large, increased consumption of bait and oxygen consumption affect the growth of fish or even endanger the survival of the out of the pool specifications irregularities, reduce the passing rate of commercial fish, Thus affecting the economic benefits. In order to explore the control of fish pond tilapia seed density is too large and easy