Filamentine is a freshwater fish that is a specialty of Southeast Asia. It is a kind of tropical fish that is both edible and ornamental. The fish protein is rich in ingredients, high in nutritional value, and has delicate meat, delicious taste, fast growth, and high population yield. When the seedlings were raised in the 8th month, they could reach 800-1000 g and the largest individual could reach 20 kg. Farmers and consumers like it, and they are very popular in the international market. They are a kind of high-end economic fish. They are known as the "God of God" in Vietnam and other places. As the living habits of the filaments and their ecological environment are consistent with the climate in the south of China, and there are a wide range of feed sources, a few places in China have been introduced as ornamental fish in recent years. According to experts, if the use of earth-based ponds to grow long silk pupa, due to the close proximity of its physical and chemical factors to the natural environment, the growth rate of filaments can be greatly increased. The Fisheries Technology Promotion Station of Yingshan County, Hubei Province has introduced the Filaments from the An Giang province in Vietnam through the Provincial Fisheries Science Research Institute and has used the unique local geothermal resources for the development of pollution-free aquaculture. The breeding techniques are briefly described below and are for reference only.
I. Pond conditions
Filamenta is a tropical fish and its water temperature is very strict. Its suitable water temperature is 22°C-32°C, and the optimum water temperature is 24°C-30°C. The slower the water growth, the lower the water temperature, the slower the water temperature, when the water temperature drops to 16°C. Stop eating. If the water temperature is below 12°C, it will freeze or even die. Therefore, it is necessary to select adequate cold and hot water sources, no pollution, moderate water and fat lean, convenient drainage and irrigation water as aquaculture ponds, with an area of ​​2 mu -3 mu, water depth of 2 meters or more, water quality requirements slightly alkaline, in line with the requirements of pollution-free breeding The transparency is more than 35 cm. Because the fish fins are two hard filaments extending to the caudal fins, and the fish body is flat and wide, in order to prevent the bottom of the cement pool wall from scratching the fish body, the culture ponds are suitable for earth culture.
Second, seed stocking
Although the requirement of dissolved oxygen in water is not high, the long-fibre silk must have reasonable density and suitable specifications in the breeding process, and the methods and techniques for seedling stocking must also be emphasized in the feeding process.
1. Clear Pond Disinfection: Before stocking, when the depth of water is 20 cm per mu, splash lime with 130 kg -150 kg of lime, and fully expose the sun. After 3 days, pour the water into the depth of 60 cm. After about 5 days to 7 days, the water level can be deepened. After the efficacy disappears, put the fish into the pool.
2. Fertilizer submerged ponds: Seedlings are planted with 150 kg of green manure per acre in front of the lower pond, and 3 kg of soybean milk per acre. When a large number of zooplankton, cladocera, copepods and zooplankton occur in the pond water, they can be released. Seedlings, and the pool water level gradually increased to 2 meters or so, top dressing organic fertilizer.
3. Stocking Density: The stocking density directly affects the growth rate and the outlet size of the filaments. The stocking size should be determined according to the fish size, quality, feed source, pond ecological conditions, management level, market conditions, etc. If the pond water supply is sufficient, Generally, about 3.3 centimeters per acre can be stocked with 5000 to 7,000 tails, and 50 to 80 tails per acre.
4. Restocking requirements: First introduced the requirements of pure varieties, specifications and tidy, disease-free and injury-free, swimming lively, healthy and strong. Secondly, the filaments should be raised monoculture. For polyculture, polyculture with filter-feeding, herbivorous fish should be adopted, and polyculture with omnivorous fish is not allowed. Finally, the fish body should be disinfected when the seedlings are released. The fish body can be bathed with 3% saline for 3 minutes to 5 minutes or with 15ppm-20ppm potassium permanganate for 15 minutes to 20 minutes. At the same time, attention should be paid to temperature-lowering ponds, and seedlings in the low-temperature period should be susceptible to hydromycosis.
Third, feeding and management
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