The scale culture of Pelteobagrus fulvidraco is difficult and the effect of mixed culture is good.

Pelteobagrus fulvidraco is a benthic omnivorous fish with tender meat, rich nutrition and high economic value. It is a breeding species with great market potential. Pelteobagrus fulvidraco has strong adaptability and grows slower than Cyprinidae fish, but it grows faster than Cyprinidae fish itself. The fry reproduced in the same year can reach commercial specifications in the same year, and the population yield is relatively high. Due to the difficulties in large-scale artificial culture, it is imperative to carry out polyculture. The polyculture of Pelteobagrus fulvidraco in the fishing pond has the following advantages: firstly, it can feed on low-value miscellaneous fish and shrimp, fish residue, organic debris, zooplankton and the like in the fishing pond, so as to improve the net yield of the fishing pond. The other is that Pelteobagrus fulvidraco ingests parasites such as Anchorocephalus in water, which can reduce the occurrence of fish diseases. Thirdly, on the basis of not affecting the yield of the main cultivated varieties, the yield of yellow catfish is increased by 5 kg ~20 kg per mu, and the benefit per mu is more than several hundred yuan. The polyculture technology is described as follows:

polyculture of adult fish

There is no strict requirement for the main fish cultured in adult fish pond when yellow catfish is polycultured. Fishery ponds for cultivating the four major domestic fishes and fishing ponds for mainly cultivating feeding fishes (such as carp, crucian carp, tilapia, freshwater white pomfret) can be used for polyculture of Pelteobagrus fulvidraco. Fishing pond area 20 mu ~30 mu, water depth 2 meters ~2.5 meters, sufficient water, good water quality, convenient water injection and drainage. Generally, 40 ~50 yellow catfish are put in each mu, with the specification of 3 cm/tail ~4 cm/tail, and 5 kg ~8 kg yellow catfish can be added per mu.

parent pond polyculture

The polyculture of parent fish pond can not only make full use of the water space of parent fish pond and improve the utilization rate of parent fish pond, but also can feed on some small wild fish competing with parent fish for oxygen consumption in parent fish pond. After the artificial propagation of parent fish is finished, 40 - 60 yellow catfish are bred per mu, the specification is 2 cm/tail-3 cm/tail, and the yellow catfish can be increased by 6 kg-10 kg per mu.

mixed culture of adult crab

Mixed culture of Pelteobagrus fulvidraco in crab pond can make full use of natural food biological resources in crab pond. Generally, the crab pond covers an area of 30 mu ~50 mu, and the coverage rate of aquatic plants is about 50%. After the crab species are bred, 30 ~50 yellow catfish are bred per mu, with the specification of 3 cm/tail ~5 cm/tail, and the yellow catfish can be increased by 5 kg ~10 kg per mu.

stream polyculture

There are many low-value wild miscellaneous fish in the river ditch, and polyculture of Pelteobagrus fulvidraco can save artificial bait. Generally, 40 ~60 yellow catfish are put per mu, with the specification of 2 cm/tail ~4 cm/tail, and 6 kg ~12 kg yellow catfish can be added per mu.

large water polyculture

The polyculture of Pelteobagrus fulvidraco in large water surface has high population yield, which does not affect the yield of the main culture variety and does not need additional feeding. Generally, 40 ~60 yellow catfish are put per mu, with the specification of 3 cm/tail ~4 cm/tail, and 8 kg ~15 kg yellow catfish can be added per mu.

Regardless of the polyculture method, the following matters need to be noted in aquaculture management:

One is to keep the water body with high dissolved oxygen. Pelteobagrus fulvidraco has higher requirements for dissolved oxygen in pool water, so fresh water quality and sufficient dissolved oxygen are required during mixed culture. Fresh water should be added in time during growing season, and water should be changed frequently in high temperature season.

The second is to maintain reasonable stocking density and stocking specifications. According to the feed biomass of water body, scientifically and reasonably determine the polyculture ratio and stocking specification. Generally, 30 ~60 fish are suitable for polyculture in water body, and the stocking specification is 3 cm/fish ~4 cm/fish. If the density is too large, the specification is too small, and the end of the year cannot reach the market specification.

Third, it is no longer suitable for polyculture of other carnivorous fish after polyculture of Pelteobagrus fulvidraco in fishing pond, and it is not suitable for polyculture of Pelteobagrus fulvidraco in culture pond of freshwater lobster and freshwater crayfish.

Fourthly, in the breeding process, if the specification of Pelteobagrus fulvidraco is found to be too small, it indicates that the biomass of natural bait in the fishing pond is insufficient, so small miscellaneous fish and shrimp, summer flowers of domestic fish or artificial special bait for Pelteobagrus fulvidraco can be supplemented appropriately. When feeding artificial bait, the main breed should be fed first (put into shallow water area), and then the yellow catfish (put into deep water area). Pelteobagrus fulvidraco has the habit of lying in the daytime and coming out at night, so feeding should be mainly at night.

Fifth, mixed culture of Pelteobagrus fulvidraco in crab pond, because crab and Pelteobagrus fulvidraco are in the same water layer position ecologically, it is easy to cause ecological position competition between them. Therefore, crab ponds must maintain sufficient natural food organisms, otherwise it will affect the feeding effect of Pelteobagrus fulvidraco. 300kg ~ 400kg snails and some crucian carp with eggs and green shrimp with eggs can be put into crab pond in advance, so as to breed naturally and feed crab and pelteobagrus freely.