The scientific name of the yellow swordfish is the catfish.
Cultivation method:
Prepare a pond with an area of ??2 to 10 acres, a water depth of 1.5 to 2m, a solid pond ridge that does not leak, easy drainage and irrigation, and a thickness of silt at the bottom of the pond that does not exceed 20cm. The pond is mainly used for the breeding of silver carp and bighead carp. In order to regulate the water quality, a small amount of silver carp and bighead carp can be raised per acre. Stocking density depends on pond conditions and management level. Generally, 800 summer croaker fingerlings of about 3 cm each can be stocked per acre, and about 50 first-age silver carp and bighead carp fingerlings of 50 g/tail can be stocked. Properly raise river crabs in the pond. Some of the uneaten feed (fish pieces) that have sunk to the bottom of the pond can be ingested by the river crabs, allowing them to act as "scavengers". In this way, it can reduce the risk of food residues rotting The water quality deteriorates and the breeding efficiency can be increased. Generally, 600 to 800 summer croakers with a size of about 3 cm can be stocked per acre. The stocking quantity of silver carp and bighead carp is the same as that of "special breeding". Each acre can be stocked with 120 to 200 first-age crabs/kg. Plant about 100 to 150 individuals. At the same time, stock water peanuts appropriately on the pond surface and plant aquatic plants (Vallisneria or Hydrilla verticillata) on the bottom of the pond.
Anchovy is a ferocious fish that feeds on live fish in natural waters. However, in artificial breeding, if live bait is still fed, firstly, the breeding cost is high, and secondly, a special breeding pond for feed fish needs to be equipped, and the palatability of the feed fish must be ensured, which is more troublesome. Experiments have shown that after domestication, the diet of anchovy has changed from eating live fish to eating dead fish (fish pieces). Therefore, the feed for catfish can be live fry in the early stage and fish pieces in the later stage. The domestication of the food habits of the anchovy can begin when the fish is about 5 centimeters long. Before the body length is 5 cm, palatable live fry should be fed.
Fish chunks should be fed regularly, at fixed points, and in a quantitative manner, usually once in the morning and once in the afternoon. Before feeding, "splash water to attract fish", and then feed fish chunks after the catfish gather in the feeding ground. The amount of feeding depends on the weather, water temperature and fish eating conditions. Generally, the daily feeding amount is 5% to 8% of the fish's body weight. If frozen fish chunks are mainly fed, fresh fish chunks should be supplemented at regular intervals, or multivitamins and vitamin C should be added to the frozen fish chunks.
The daily management methods in anchovy farming are basically the same as those in other fish farming. During breeding, attention should be paid to controlling water quality, keeping the water fresh and rich in dissolved oxygen, and the transparency should be controlled above 30cm. In the early stage, water injection is the main method, and water can be added every half month so that the water in the pond will continue to deepen as the fish body increases. In the middle and later stages, the water should be changed in a timely manner, and quicklime should be regularly poured into the pool. Compound biological agents can also be applied to improve water quality. In hot and humid weather, oxygen should be added in a timely manner to prevent hypoxia and floating heads.