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日本的淡水鱼类养殖,大部分采用精养形式,因此需要投饵。在投饵养鱼中,就水质环境的基本问题来看,水温问题另作别论的话,大概有二个问题。一个是如何补充养殖鱼类和池水、底质等消耗的氧的问题,另一个是如何处理投饵所带来的池塘内大量有机物——粪便、饵料残渣等的问题。这里主要就静水式池塘的环境条件加以说明。同时也涉及一部分其他方式的鱼池环境条件。
Freshwater fish farming in Japan, mostly in intensive form, requires feeding. In the feeding of fish, the basic problems of water quality and environment point of view, the water temperature issue otherwise, there are about two questions. One is how to replenish the oxygen consumed by farmed fish, water and sediment, and the other is how to deal with the large amount of organic matter in the ponds caused by feeding - feces, bait residue and the like. Here mainly to the hydrostatic pond environmental conditions to be described. It also covers some of the other ways pond environment conditions.