How to polyculture mandarin fish for a high survival rate? Practical methods shared

Mandarin fish is a typical carnivorous fish that only eats live fish and live shrimp. Raising mandarin fish alone requires supporting the culture of forage fish, and the technical requirements are high. If mandarin fish are polycultured in adult fish ponds, the water body can be fully utilized and wild trash fish in the adult fish ponds can be cleared out.

In recent years, some farmers have reported that the survival rate of mandarin fish polycultured in adult fish ponds is very low, and in some cases is almost 0, and they have lost confidence in polyculturing mandarin fish. Through investigation and analysis of ponds with polycultured mandarin fish, the main reasons for the low survival rate of mandarin fish are: the stocking size is small, with most having a body length below 3 cm, and after the fry are put into the pond their feeding ability is poor and their ability to adapt to the environment is relatively weak; second, the stocking quantity is too large, with some stocking 80-100 fish per mu, and combined with insufficient suitable feed, this easily causes cannibalism; third, the pond water quality environment is poor, with frequent oxygen deficiency; fourth, fish disease prevention and control is not timely and attention is not paid to the method of medication, etc.

In aquaculture production, taking the following measures can effectively increase the survival rate of mandarin fish polycultured in adult fish ponds: (1) Increase the stocking size of mandarin fish to ensure that the body length reaches more than 5 cm when the mandarin fish are put into the pond. (2) Stock mandarin fish fry according to the source and quantity of feed in the pond, generally 20-30 fish per mu, and before the mandarin fish fry are put into the pond, appropriately release berried freshwater shrimp, crucian carp or tilapia to let them reproduce naturally, ensuring that when the mandarin fish have a body length of 5-10 cm there is sufficient live feed such as shrimp fry, and when the mandarin fish body length reaches more than 10 cm, forage fish should be properly fed to ensure an adequate supply of forage fish. (3) Strengthen water quality management, regularly add and exchange new water, use microecological preparations and bottom improvement agents to improve water quality and bottom sediment, reasonably use aerators, and achieve the practice of “three on, two off”, and transplant a small amount of alligator weed to purify water quality and create a good growth environment. (4) Strengthen disease prevention and achieve “prevention first, combining prevention and control”. First, do a good job of cleaning and disinfecting the fish pond; second, when other fish are being medicated, consider the sensitivity of mandarin fish to drugs and pay attention to the dosage.

In short, when polyculturing mandarin fish in adult fish ponds, they should be scientifically raised according to their biological characteristics in order to obtain good economic benefits.