CATDOLL : CATDOLL: I would like to ask what should I pay attention to when breeding freshwater white pomfret?

I would like to ask what should I pay attention to when breeding freshwater white pomfret?

Freshwater silver pomfret is a freshwater fish species introduced to mainland my country in the 1980s. It is popular among farmers due to its good meat quality, fast growth rate, easy management and large market sales. However, since freshwater silver pomfret is a warm-water fish, the optimal growth temperature is 15-30℃. When the water temperature is lower than 12℃ or higher than 36℃, it will freeze to death or burn. Therefore, the following technical points should be grasped for the wintering of freshwater silver pomfret fry.

1. Site selection. The pond selected for the wintering of freshwater silver pomfret must be able to maintain a water depth of more than 1.5 meters, the lowest water temperature (in January) can be maintained above 12℃, the area is 1000-2000 square meters, the water source is convenient, the sun is sufficient, and the site is preferably sheltered from the north wind.

2. Set up a cold-proof shed. For ordinary ponds (ponds without hot spring water), freshwater silver pomfret must set up a cold-proof shed for wintering. At present, most farmers use small galvanized pipes and angle irons to weld into a half-moon shape and fix it on the pond embankment; then, cover the shelf with nylon film. The setting position is generally close to the north side of the pond in the north-south direction, and the shed area accounts for about 1/2 or 2/3 of the entire pond. You can also use straw or weeds to clip into a straw mat of 100×130 cm, and then cover the surface of the fish pond on the north side of the pond. The front end of the straw mat is 70 cm away from the water surface, and the back end is close to the water surface. Put some straw under the cold-proof shed. In this way, when a cold wave hits, the fry can gather in the weeds to keep warm. Some farmers use water lilies to stock 1/2 or 1/3 of the pond, and isolate them with bamboo poles to prevent them from growing freely in the entire pond. One of the above measures is to prevent hail or snow from falling directly into the fish pond on rainy and snowy days, alarming the fish and injuring them. Of course, there is no need to build a cold-proof shed for ponds with hot spring water, and freshwater silver pomfret can safely overwinter.

3. Daily feeding and management. During the wintering period of freshwater silver pomfret (i.e., from late November to late February of the following year), whether the feeding and management are in place directly affects the survival rate of spring fish and the overall economic benefits. Therefore, management should pay attention to:

1. Feeding. When the water temperature is above 20℃, the daily feed amount should be controlled at 4%-5% of the fish body weight, and feed in the morning and afternoon; generally use peanut bran or feed containing more than 30% crude protein, soak it before use. When the water temperature is around 15-20℃, the daily feed amount accounts for 2%-3% of the fish body weight, and feed in the afternoon. No need to feed when the water temperature is below 15℃. Feed should be fed in a fixed position in the cold-proof shed, and delivered at a fixed time, location, quality, and quantity.

2. Water quality management. Due to the low temperature in winter, the metabolism in the pond is slow, so the water in the pond tends to become clear, and the transparency is often greater than 30 cm. At this time, some fermented chicken manure or pig manure should be appropriately put into the pond to make the water quality "green, tender and refreshing"; the transparency is about 20 cm.

3. Other matters. During the wintering period of freshwater silver pomfret, try not to go into the pond to catch fish to avoid injuries; it is strictly forbidden to use drugs such as trichlorfon; otherwise, the whole pond will die and the loss will be irreversible.

4. Management in early spring. When the water temperature is stable above 20℃, the appetite of freshwater silver pomfret begins to increase; at this time, it should be fed with concentrated feed and appropriate green feed. Generally, concentrated feed is mainly peanut bran or soybean powder or compound feed containing more than 30% crude protein, and the daily feeding amount is about 4% of the fish body weight; green feed is fed with forage grass or oilseed vegetable, and the daily feeding amount is about 20% of the fish body weight; usually green feed is fed in the morning and concentrated feed is fed in the afternoon. In addition, inject a proper amount of new water into the pond to keep the pond water "green, tender and refreshing", which is conducive to the growth and development of silver pomfret fry and the sale and transportation of spring slices.

Pay attention to the selection of feed and the ratio of feed, ensure the oxygen content in the water, and properly disinfect the fish.

1. Since freshwater silver pomfret has a small adaptability to temperature differences, care should be taken when stocking it to ensure that the temperature difference between the wintering pond and the breeding pond does not exceed 3°C.

2. Generally, the water should be changed 1-2 times a month, and no more than 1/3 of the water should be changed each time. When changing the water, pay attention to controlling the water temperature to keep it above 20°C, and the temperature difference before and after the water change should not exceed 2°C.

3. Before the freshwater silver pomfret enters the wintering pond, strengthen autumn cultivation to enhance its physique and improve its disease resistance. Strengthen feeding, with a daily feeding amount of 6% of the fish body weight and a protein content of 30%. Feed fresh leaves or duckweed appropriately to adjust its appetite. Keep the wintering area quiet and try to avoid scaring the wintering fish. Prevent birds from attacking the fish to ensure that the freshwater silver pomfret has a good wintering environment.

4. After December every year, trawling is not allowed, otherwise it will cause the death of a large number of freshwater silver pomfret. Freshwater silver pomfret is very sensitive to "dichlorodiphenyltrichloroethane", so its use must be prohibited.

First of all, you should choose a pond with good water quality, no pollution, sufficient water source, and convenient drainage and irrigation. Before stocking, you should clean the pond with quicklime and fertilize the water with decomposed organic manure. In daily management, you should pay attention to filling water in stages to keep the water level stable at 1.2-1.2m.

How to make freshwater white pomfret delicious

Authentic steps for the simple version of braised freshwater white pomfret:

Descale the white pomfret, clean and cut into pieces

Cut the green onion into sections and slice the ginger for later use

Deep fry the fish until it changes color

The fried fish will not fall apart during the braising process. Finally, add water, dark soy sauce, sugar, salt, star anise, cinnamon, ginger slices, and green onions to the pot, bring to a boil, and add the fish. Simmer over low heat for about ten minutes, open the lid to collect the sauce, thicken with starch, and serve.

Freshwater silver pomfret (Colossoma brach ypomum), scientifically known as short-capped giant characin, is native to the Amazon River in South America and is a tropical and subtropical fish. Freshwater silver pomfret (hereinafter referred to as freshwater pomfret) has the characteristics of omnivorous diet, fast growth, large size, few diseases, easy fishing, thick meat, few spines, delicious taste, and rich nutrition. It is a valuable fish in expanding pond farming objects and increasing unit area production. It can also be used as an ornamental fish in the juvenile stage. Freshwater pomfret was introduced to Taiwan Province of China in 1982, and then artificial breeding was successful, and began to be promoted in freshwater fish ponds.

It was introduced from Taiwan Province to Guangdong Province via Hong Kong for trial breeding in 1985, and artificial breeding was successfully achieved in 1987. It was then gradually promoted throughout the country and became one of the famous and special varieties with the highest annual output.

Materials

Pomfret

Dark soy sauce

Shanghai aged wine

A little pickled pepper

A little pepper

A little fennel

A little onion

A little garlic

step

1. Take the pomfret out of the freezer and defrost it naturally. Remove the gills and internal organs and make a few cuts on the surface.

2. Chop onion and garlic

3. Pour oil into the pan and add onion, garlic and pickled pepper to sauté until fragrant

4. Add dark soy sauce and aged wine after sautéing

5. When the soup is half boiled, add the pomfret

6. Add fennel, cover and cook over high heat

7. Turn the fish over once during the cooking process, add salt to taste, and cook until the soup thickens.

8. Sprinkle pepper before serving, and sprinkle a little fennel after serving

Steaming or stewing is OK