Gold expensive breeding technology

First, biological properties

1, diet: gold expensive omnivorous fish, fish to 1st instar gold is the most important food species zooplankton, artificial breeding can be fed a variety of mixed commodity materials; zooplankton and benthic animals are 2 years old gold expensive The main food, artificial breeding can be fed a variety of compound feed. The 3rd-instar goldfish is like granular food. In the ecological competition, it is a vulnerable group. The food competition between the old fish and the small fish is fierce. The contradiction between grass carp and fish is much lower. Therefore, it is necessary to properly control the breeding density of carp in the breeding mix.

2, growth: gold and expensive common individual is about 0.5-1 kg, some up to 3-4 kg, the largest individual up to 8 kg, juvenile fish generally up to 50-80 grams, up to 500 grams the following year - 1000 grams.

3. Reproductive: The golden age of preciousness is generally 2 years of age. It is a multiple spawning type under natural conditions. Each batch of spawning interval is two weeks. Spawning begins when the water temperature is above 18°C. With a certain viscosity, the suitable water temperature for hatching is 18-25 °C. Under the appropriate temperature, raising the water temperature and narrowing the temperature difference are very beneficial to the concentrated rupture of fish fry and embryonic development. After 72 hours, the larvae can be hatched.

4. Habits: Gold and you like to live in aquatic plants inhabiting, sheltering yin, feeding and dissolving oxygen in fish ponds, ponds, reservoirs, rivers, lakes and other waters; resistance to hypoxia, skin with respiratory function, from the water quite Do not die for a long time; the optimum pH is 6-9; the survival temperature is 1-40°C, the suitable growth temperature is 22-28°C, and the optimum growth temperature is 27-28°C.

Second, gold expensive culture

1. Fry species breeding:

(1) larval fish production: Cement pond cultivation and pond culture can be adopted. The concrete pool can contain 2000-3000 water droplets per cubic meter, and the pond can contain 3-5 million water droplets per mu. Attention should be paid to the supply of food supplements. It is very important to eat very fine zooplankton and plants. Every day, soymilk can be dispensed. Conditionally enough to feed Artemia bugs and calves with powder. Shale cloth should be added to the cement pool to prevent the water temperature from rising too fast. The pond can be cultured using the conventional fertilizer pond method. However, the plankton density and size should be taken into account, and the water quality should be adjusted in due course. The fry is cultivated for 30 days and the specification can reach 3-5?.

(2) Fish species cultivation: Fish species can be cultivated in concrete ponds and ponds. The cement pool can be cultivated with 2-3 è‹— seedlings of 1000-2000 tails per cubic meter. The larvae are to be fished every day. The granule buoyant material is the best for feedstuffs. It is necessary to fill the water regularly to improve the water quality; 8000 tails of 2-3 fry can be grown using large grasses and inorganic fertilizers. In the later stages of cultivation, cakes and compound feeds can be fed for supplementation. The fish species are cultivated for 2 months and the specifications can reach 8-15? The output can reach 300-600 kg/mu.

2, adult fish breeding:

Stocking: The pond area of ​​3-5 acres is more suitable, there may be aquatic grass, 1500-2000 tail of gold expensive fish species (specification 5?).

Feed feeding: feed mixed feed containing 32-34% of crude protein or mixed pellet feed (such as tilapia feed, pond feed, fork tail, etc.). It is recommended to use extruded floating pellet feed, which can be grown to The habit of catching food on the water surface is convenient for observing the growth and eating conditions. The daily feeding rate of the growing season is generally 3-5% of the total fish load in the pond, and the principle of “four determinations” is adopted.

Water quality regulation: Water quality requires “moderate fatness, adequate dissolved oxygen,” and transparency is controlled at 20-30 cm. From time to time, biological agents are used to regulate plankton populations, and organic fertilizers and inorganic fertilizers can be used in combination to ensure a stable source of nutrients, and new water is properly added to regulate water quality. In the later period of cultivation, an aerator shall be provided when the pond contains more than 5000 kg/ha of fish.

Two questions to note:

1 Because the growth rate of individual gold is different, and it is relatively easy to cause uneven distribution of commodity fish, the size of the individual should be checked frequently in aquaculture production. It is better to adopt the “grading” or “catch and stay small” culture method, that is, the fish of the same size. The fishes are intensively bred, and the fish that meet the specifications of commercial fish are marketed as early as possible, and the fish with smaller specifications are intensively cultivated.

2 When the weather is hot, the water level should be increased as much as possible, preferably 2 meters or more, to reduce the occurrence of diseases.

After 8-10 months of culture, the average gold individual is 350-500 grams in average, and the net output of the mu is 400-700 kg. The experimental gold and expensive polyculture with carp and sunfish are ideal. In addition, gold is still a good variety of reservoir discharge.

Third, fish disease prevention

From the perspective of the breeding situation in recent years, there are fewer diseases of gold and gold. According to the survey, common parasites such as rotten gills, water mold, skin skin, and trichoderma and double worms may be used. Disease control methods have a good effect. Because of its bright colors, gold is more vulnerable to waterfowl. Generally, scarecrows scare the waterbirds around the breeding ponds. Conditional conditions can set up fishing nets above the breeding ponds to prevent water birds from entering.

The gold will be gradually expanded in our country. The disease of the fish will become more and more as the degree of intensification increases, so it should arouse the attention and active prevention and control of relevant departments and farmers.

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Dongguan City Risen Medical Products Co., Ltd. , https://www.risenppe.com