In this system, stocking density is high, maximum being 12000 nos./ha.. The pond is prepared in the same way as in the case of composite fish farming. No extra management works are necessary. However, anursery pond is a prerequisite in the system. Fish culture is done continuously for 3 years, wherein harvesting and restocking starts right from the 4th month of stocking. Fish production is 3000- 3500 kg/ha/year.
Advantages of the technology :
- In this system, the farmers need not have a big capital to meet the various recurring expenditure of fish cultivation. He has to manage the pond for a maximum period of 4 months. Then onwards he starts earning, which is reinvested for purchasing of various items required for further fish rearing. Therefore, a marginal farmer can also take up scientific fish farming with his meager resources by adopting this system.
- Netting in short intervals results in release of noxious gases and mixing of bottom nutrients with surface water, which enhances primary productivity of the pond.
- There are several other advantages.
However, the prime advantage is that the fish production is much higher than yearly composite fish culture system.