American gold wolfberry breeding method

American gold wolfberry breeding method

The American gold cocoon, also known as silk cocoon, is the most famous carp in the United States. It is also one of the most famous warm and cold water-based freshwater fishing species, and is widely distributed in the central and northern regions of the United States. It has a beautiful shape and delicate and refreshing meat. Its protein and amino acid content is higher than that of Chinese mandarin fish with the crown of “freshwater”, and is also higher than that of herring, soft-shelled turtle, and stingray, and especially rich in calcium, magnesium and phosphorus. It is famous for its many trace elements and vitamins such as iron, sodium, and potassium.

First, artificial breeding

When the water temperature is stable at about 14°C, artificial ovulation can be performed. The best urine production temperature is 18°C~20°C. The mature broodstock was raised in cages 2 hours in advance and supplemented with slow water stimulation. Types of oxytocin include: pituitary glands of salmon, human chorionic gonadotropin, and luteinizing hormone-releasing hormone analogues. Males were injected with one needle and females were injected with two needles. Generally, artificial insemination can be performed after 8 hours to 24 hours. The length of the golden pheasant incubating period depends on the water temperature. Generally, it takes 12 days at 12°C; it takes 5 days at 18°C ​​to produce a film; in the range of 14°C to 18°C, the hatching rate is 85% to 90%.

Second, aquaculture production

1. larval fish production

When the pond is extensively cultivated, the area is required to be 3 mu to 5 mu, and the water depth is 1.0 meter to 1.5 meters. It is better to pay attention to the water quality of fertilization before stocking. The stocking density is generally 50,000 to 100,000 tails per mu; half intensive farming is used. Dozens of square meters to dozens of square meters of cement pools are used to raise the golden otters. Generally, thousands of eggs are placed per square meter. When intensive culture, stocking densities are taken care of. Generally, the starting density is 100,000 to 200,000 per acre.

2. Fish breeding

When the species of fish grows to 2 cm to 3 cm in size, it needs to be stocked in a reasonable manner, generally 0.500 to 0.600 per mu, and intensive farming can be increased to 07,000 to 10,000 per mu. The aquaculture process can be used for aquaculture. After its body length reaches 1.8 cm, it can be domesticated and fed with artificial compound feed.

3. Adult fish breeding

The pond area is 5 mu to 15 mu, and the water depth is 1.5 to 2.5 meters. When full-price compound feed is used for breeding, the stocking density should be controlled at 1500 to 3000 tails per acre for species with a size of 10 cm to 15 cm. A small amount of fertilization and feeding combined methods can be used to grow adult fish for daily management. By the end of the year, the average market size can reach 150g/cap and the per mu output can reach more than 400kg.

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