Techniques for raising fish in slices

Slice fish (Photo: 4so9)

Fish meat slices delicious, can be processed many high-quality dishes for export. Lettuce fish live in estuaries, canals, ponds, fields . fish can withstand the water environment with low levels of oxygen and pH, can live in brackish water lagoons.

All waterways in the Mekong Delta have sliced ​​fish, especially in low-lying areas. This species is omnivorous in animals, fish can eat molluscs, crustaceans, juveniles, plankton, aquatic plants .

Low-weight fish sliced, one year old has an average length of 16cm, weighs 40-60g / head. Farming in ponds reached 100g / head after 12 months of culture.

Farming pond :

Ponds are from 100-400m ² in size or larger; pond banks must be sure, the pond bottom must be flat, with an active water supply and drainage sewer, pond water has a pH of 7-8 and dissolved oxygen is greater than 3mg / liter, with a water retention depth of 0.8-1, 2 m.

Slapping, dredging ponds to leave bottom mud layer 15-20cm; Clean the grass around the pond, fill the cavities, not let it leak, then apply lime from 10-15kg / 100m ² , dry the sun for 2-3 days then put water into the pond through the filter.

Choose breeding breeds :

Breeding fish of uniform size is not deformed, it is not healthy. Drop fish into the pond in the early morning or late afternoon.

Stocking density of 5-10 individuals / m ² .

Feeding :

Feed shrimps and shrimps with chopped fish or live shrimps and fish into ponds. Can be fed with bran, plate, mix of light fishmeal according to the rate of 30% fish meal + 70% bran. Fish should be fed on the floor to monitor and adjust the amount of food accordingly. Food ration is 5-10% by weight of fish stocked. Should be fed 2 times / day, because the fish is active at night, should feed in the morning the amount of food equal to 1/3 of the daily diet, the afternoon is equal to 2/3 of the weight of the daily ration. Daily monitoring the amount of feed to fully adjust, observe the activity of fish, periodically supply new water to the pond.

Harvest :

One year fish farming reaches from 80-150g / fish at this time. The fish are sliced ​​because of their hidden nature, snuggling in the sticking objects, so it is difficult to pull the net, the best way to harvest is to remove the water, pull some nets and then slap the water to catch fish thoroughly.

Preventing and treating diseases :

Slice fish (Photo: 4so9)

Healthy fish usually gather each herd, hide in the shelves, sniff and snorkel quickly. When the fish swim around and swim slowly on the water, it is a sign that the fish is sick.

Slice fish often suffer from some diseases:

- Hydrocephalopathy: Fish skin appears grayish white area with small soft mycelia, mushroom mycelia thrives crisscrossing into cotton like cotton can be seen with the naked eye.

Treatment : Bath fish in 2-3% salt water for 5-10 minutes.

- Wheel disease: Gray fish skin, fish body is viscous, slightly opalescent.

Treatment : Bathe fish in 2-3% salt water for 5-15 minutes or CuSO ₄ concentration 2-5ppm for 5-15 minutes. or directly spray CuSO ₄ concentration of 0.5-0.7ppm into the pond.

- The disease of melon fruit (white spot): The fish body has a lot of parasitic clinging to small pieces of opaque white color that can be seen with the naked eye. Use CuSO _{4 to} spray into the pond for treatment.

Note : Before using medicine for fish treatment, drain the pond water to about 1/3 of the water, then add the medicine.