Measures for increasing production and increasing efficiency of mandarin fish

Mandarin fish monoculture needs to be matched with sufficient bait fish, and the technical requirements are high, so it is difficult to cultivate mandarin fish in large areas. Mandarin fish can be cultured in other aquaculture waters.

I. the mode of captive cultivation

1. Captive culture in adult fish pond. Ponds for feeding predatory fish require abundant water, good water quality, convenient injection and drainage, an area of 5-10 mu and a water depth of 2-2.5 meters. Generally, there are 50-80 summer flowers of one-year-old mandarin fish or early breeding mandarin fish per mu.

2. New fish pond culture. After the end of artificial breeding of parent fish, 50-100 mandarin fish with a body length of 5-8 cm per mu can increase the income of commercial mandarin fish by about 15 kg.

3. Adult crab pond culture. After crab breeding, 4-5 two-winter-old crucian carp are put per mu to naturally reproduce fish fry, which can be used as open feed for mandarin fish. Put 15-20 mandarin fish in summer flowers per mu, which can increase the income of commercial mandarin fish by 5-8 kg per mu.

4. Cultivation on the big water surface. Generally, 25-30 mandarin fish species or summer flowers per mu do not affect the yield of conventional species of fish, nor do they need to be fed separately.

5. Small river ditch interplanting. There are more wild miscellaneous fish in the small river ditch, which can be used to raise mandarin fish. Generally, there are about 30 large size mandarin fish with more than 50 grams per mu.

II. Points for attention

1. Keep high dissolved oxygen content. Mandarin fish have higher requirements for dissolved oxygen in water, and it is required that the water quality on the surface of mandarin fish is fresh and sufficient, it is best to plant a certain amount of water plants, new water should be injected frequently in growing season, and water should be changed frequently in high temperature season, especially if micro-running water can be maintained.

2. Ensure adequate bait. Mandarin fish is a ferocious fish, and very gluttonous, when the bait is insufficient or unpalatable, there is the phenomenon of cannibalism of the same kind. Therefore, before the stocking of mandarin fish fry, the number of bait fish in the pond should be investigated. if the number of bait fish is small, miscellaneous fish or domestic fish summer flowers should be introduced into the pond. The length of bait fish is required to be between 2x5 and 3tick of the length of mandarin fish.

3. Use drugs cautiously. Because mandarin fish is extremely sensitive to some commonly used drugs, such as trichlorfon, malachite green, Fumei arsenic, copper chloride, mercurous nitrate and so on, it should be prohibited in mandarin fish culture. The prevention and treatment of diseases on the water surface of mandarin fish can be taken as follows: thoroughly cleaning the pond before stocking to create a good living environment; regularly sprinkling low concentration of quicklime liquid; ecological control measures such as sprinkling photosynthetic bacteria, sifeili and other biological agents.