In Guangdong, monoculture in ponds is most commonly used in mandarin fish culture. In order to improve economic efficiency, some farmers tend to use high-density culture to increase the density of bait fish and maintain the energy cycle of the pond by trapping filter-feeding fish. Fry are prone to damage during transportation, and using self-bred fry can ensure the survival rate. The appropriate stocking density per mu for guppy culture is 1000-1500, with a maximum of 2000 mu. Excreta discharged from overstocking can easily pollute the water quality and cause diseases.

Controlling stocking density is very important. The stocking density of Mandarin fish is 3,000 to 4,000 per mu. In addition, the lecturer reminded that the best interval for baiting is 3 days. The training course was also open to participants. Due to the high stocking density and baiting, residual bait and large amount of feces have a great impact on the water quality of the pond. Therefore, in addition to the requirement of a good pond drainage system, the regular density is generally based on the breeding conditions and skill level.

It is generally recommended that the stocking density of mandarin duck fish summer flower around 3cm is 15000-22500 tails/h, and the stocking density is 2500-3000 tails/m 3. At the end of May, the mandarin duck fish fry that grow to 5-6cm are put into the adult fish culture pond, and the stocking density is 1800-2000 tails/mu. The density of fresh fish is also essential to ensure the survival rate of Mandarin fish.

Generally speaking, people who have just started to culture Mandarin fish can choose a stocking density of about 1,000 fish/mu due to the immaturity of the culture technology. The stocking density, in general, is 800-1200 fish/mu. In order to regulate the water quality of Siniperca chuatsi ponds, 20-30 silver carp species of 100 grams or above should be stocked per mu. After stocking, the fish should be put into the mandarin duck fish pool... The length of mandarin duck fish is 10-15 centimeters, the weight is 40-50 grams, and the stocking density is 800-1000 fish per mu. If the stocking scale is large and properly managed, the survival rate can reach about 90%.