CATDOLL : CATDOLL: What should we pay attention to when breeding freshwater silver pomfret?

1. What should we pay attention to when breeding freshwater silver pomfret?

Freshwater silver pomfret has a varied diet and can consume a variety of aquatic and terrestrial plants, small fish and shrimp, organic debris, wheat bran, bean cake and other agricultural and sideline products. However, in order to improve the utilization rate of feed and the input-output ratio, freshwater silver pomfret should be fed with sinking granular feed when mixed with other fish. It should be fed 4 times a day, 40% in the morning and 60% in the afternoon. The daily feeding amount is 5% to 7% of the fish body weight. If the water temperature is low, the feeding amount can be appropriately reduced. When mixed with shrimp, no bait is needed.

In aquaculture, water quality management should be strengthened to maintain a good water environment. Regular disinfection and the use of water quality improvers such as zeolite powder should be adhered to to reduce excessive organic suspended matter in the water. Freshwater silver pomfret has strong disease resistance and rarely suffers from diseases when aquacultured in saline-alkali water. However, attention should also be paid to fish disease prevention and control, especially strengthening the disinfection of fish species to avoid bringing diseases and parasites into the aquaculture pond.

This article is from: "History of the Development of Agricultural and Animal Husbandry Science and Technology in Tibet" published by China Agricultural Press

2. Is there any difference between crystal fish and pomfret? Especially the difference between small fish.

I'm a fisherman, here are some suggestions for you

Freshwater silver pomfret (Colossoma brachypomum), 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 my country in 1982, and then artificial breeding was successful, and breeding began to be promoted in freshwater fish ponds. In 1985, it was introduced from Taiwan Province to Guangdong Province via Hong Kong for trial breeding. In 1987, artificial breeding was successful. Later, it was gradually promoted throughout the country and became one of the famous special varieties with the highest annual production.

1. Morphological characteristics

Fin rays without spines. Dorsal fin 18-19; anal fin 16-18; pelvic fin 8. There are two swim bladder chambers, the posterior chamber is longer than the anterior chamber. There are 82-98 lateral line scales. There are two rows of teeth in both upper and lower jaws, and the tooth surface is notched and the tip is protruding. The number of gill rakers in the first gill arch is 30-36. There is a distinct stomach, which is U-shaped and relatively bulging. The length of the stomach is about 1/5 of the length of the intestine. There is a pyloric caeca (pyloric sac) at the junction of the stomach and duodenum, and there are fat masses around the intestine and internal organs.

According to the measurement of 42 specimens with body length ranging from 118 to 144 mm, the average body length is 1.87 times the body height, 3.35 times the head length, and 13.73 times the tail peduncle length. The head length is 1.92 times the body thickness, 4.18 times the snout length, and 4.27 times the eye diameter.

Jingyu is a freshwater silver pomfret, which is somewhat similar to saltwater pomfret in shape. It is flattened into a disc shape, with a thick back and a terminal mouth without whiskers. It has a small head, and its length is equal to its height. The eyes are medium-sized and located slightly above the corner of the mouth. The tail is forked, and the lower lobe is slightly longer than the upper lobe. There is an adipose fin on the back, and the starting point of the dorsal fin is slightly opposite to the pelvic fin. The body is covered with small round scales, and there are slightly saw-shaped ventral scales from the base of the pectoral fin to the anus. The body color is silver-gray, with red pectoral, abdominal and anal fins, and black edges on the caudal fin. There are black star spots on the body surface when the fish is in the breeding stage. This star spot disappears when it becomes an adult, but the body color of the adult fish will change due to the influence of the environment. The body color of the short-capped giant characin raised in an indoor aquarium in alkaline water lacking sunlight is darker, dark gray to black, while the body color of the short-capped giant characin raised in a pond is white, silver scales, black tail, and red fins, and the four colors match. The fish species plus the star spots on the body surface are extremely beautiful. Due to the shape and color of this fish, it is a good ornamental fish.

Pomfret Pomfret is a marine product. Pomfret, also known as flat fish, fork fish, mirror fish, etc., belongs to the family Pomfretidae of the class Pisces. Shengsi fishing grounds mainly have silver pomfret and swallowtail pomfret, but there are also some closely related species such as Chinese pomfret and gray pomfret. The silver pomfret with a deep tail fork is commonly called "long-shaped woman" or "white flat" by Shengsi fishermen. It is customary to call black pomfret, swallowtail pomfret, etc. Pomfret is not a major economic fish. In the 1960s, it was still a fishing species that was not paid much attention to. From the mid-1970s to the 1980s, the resources basically tended to be stable. In 1982, the output of the species increased relatively, second only to hairtail. After that, the catch hovered and went downhill. In 1990, the fishing output of Shengsi County was 2,864 tons.

Pomfret has a flat and tall body, oval in shape, and silver-gray in color. The adult fish can reach a length of about 40 cm. It has a small head, a round snout, a small mouth, fine teeth, and soft bones. The mouth of the fish has a strong fishy smell, so people cut off the mouth of the fish before eating it. The pelvic fins of adult fish disappear, and they feed on crustaceans. Pomfret is a warm-mixed mid-bottom layer fish that likes to gather in groups and likes to eat shrimps, jellyfish, and small benthic animals.

Pomfret starts to swim to the inland sea to spawn during the Grain Full Season. The spawning period is relatively long. Summer is the period of fattening for pomfret. In autumn and winter, the water temperature drops and the fish begin to migrate for the winter. The main fishing season for pomfret is from Qingming to the summer solstice, and the peak season is around Grain Full Season and Grain in Ear Season. The breeding and fattening of young pomfret account for a certain proportion in Shengsi County. The young pomfret mainly appears in July and August in the western Tanhu waters, in May and August in the Yangshan waters, and in Huanglong and Maguan in the Sijiao waters from April to December and July to December respectively. The young pomfret mainly appears in the Shengshan waters from September to December.

The meat of pomfret is white and tender, tastes delicious and refreshing, and is very nutritious. There are many ways to eat it, such as: scallion pomfret, braised pomfret, etc.

Crystal fish is also called freshwater white pomfret. Freshwater white pomfret (Colossoma brachypomum), scientific name Colossoma brachypomum, is native to the Amazon River in South America and is a tropical and subtropical fish.

Pomfret is a large marine tropical fish that is native to tropical and subtropical areas and is both edible and ornamental.

3. What kind of fish can you catch in the south in winter?

Fish caught in the south in winter include:

1. Carp

Carp eats at a temperature of 16-42 degrees. If it does not eat, the temperature will be below 7 degrees and above 10 degrees. It can be fished all year round. Generally, the temperature is above 10 degrees and the water temperature in some areas can reach about 8 degrees, so it can be caught.

2. Crucian carp

The feeding temperature of crucian carp is 10-40 degrees and the non-feeding temperature is below 5 degrees. Crucian carp can basically be caught in winter. Generally, when the water temperature is above 5 or 6 degrees, they will open their mouths to eat. It is the main fishing fish species in winter.

3. Tang mullet

The feeding temperature of mudskipper is 8-43 degrees and the non-feeding temperature is below 6 degrees. Mudskipper is similar to crucian carp and can be caught in winter. However, please note that mudskipper is suitable for night fishing and has few bites during the day.

4. Grass carp

The temperature for grass carp to eat is 18-39 degrees, and the temperature for not eating is below 10 degrees. If the air temperature is below 15 degrees, you cannot catch grass carp.

5. Silver Carp

The temperature for silver carp to eat is 30-40 degrees. If the temperature for not eating is below 16 degrees, don't even think about fishing for silver carp in winter, unless the temperature is over 20 degrees. You can try it, otherwise it will freeze to death.

6. Whitefish

The feeding temperature of whitebait is 8-38 degrees and the non-feeding temperature is below 5 degrees. Whitebait is really fierce. It can be caught even in such a cold winter. It is very resistant to cold.

7. Bighead carp

The temperature for bighead carp to eat is 20-40 degrees, and the temperature for not eating is below 12 degrees. Bighead carp has a slightly stronger temperature adaptability than silver carp, so there are occasional catches in winter, but they are still scarce.

8. Tilapia

The eating temperature of tilapia is 20-45 degrees and the non-eating temperature is below 10 degrees. When the air temperature is below 10 degrees, you will find that even tilapia will not eat. At this time, you should change to crucian carp bait.

9. Pomfret

The feeding temperature of pomfret is 15-45 degrees and the non-feeding temperature is below 12 degrees. Pomfret is a close relative of tropical piranhas. It can be caught occasionally in winter, but the line must be thick, otherwise it will be bitten off.

Reference source: People's Daily Online - Changsha wild fishing route map released, experts give tips on winter wild fishing

Carp Grass Carp

my country is located in the northern temperate zone and subtropical zone. Most areas have distinct four seasons. The animals and plants in nature also change with the seasons, and the activity patterns of fish are no exception.

In the long-term practice, people have summarized and explored the fishing rules that adapt to seasonal changes, and compiled many philosophical fishing proverbs, which provide valuable basis for freshwater anglers to grasp the essentials of fishing.

January is freezing cold, the coldest month in the lunar calendar. Except for the subtropical regions, fish in most areas are in hibernation, so there are very few fish to catch. It is the month with the lowest fish catching rate.

In the north, you can catch a small amount of crucian carp by fishing by breaking ice and using red worms.

Bream. But the action of taking the hook is so slight that it is difficult to detect. Other fish basically do not take the hook.

February is the month with the lowest temperature in the whole year. It is the beginning of the lunar year and a good time for ice fishing in the north for catching crucian carp and carp.

Bream and bream will bite the hook. Besides, it is also the golden time to fish for pike in Northeast China, for Nirvana in Qinghai, and for jealous fish in Xinjiang. After the "July 9th", the temperature rises and the ice in the north begins to melt, so it is not suitable to go on ice fishing. In the south, most areas are not frozen, and you can also catch a small amount of crucian carp and carp in sunny places on a clear day, but the harvest is far less than that of ice fishing in the north.

In March, the weather becomes warmer and everything comes back to life. Fish that have been dormant for the winter begin to eat and move around. Crucian carp are especially active and their range of activities gradually expands. Fishing with red worms and earthworms often yields unexpected gains.

In April, peach blossoms are in full bloom, willow trees are full of gold, and nature is full of life. Many fish begin to enter the spawning and breeding period, and have a strong desire to eat, so it is the golden season for fishing in the year. Whether in lakes, rivers, reservoirs, wild ponds, natural waters or artificial breeding farms, there are vigorous fishing scenes. At this time, it is best to use meat baits, such as red worms. Red earthworms are used for fishing.

In May, the earth is covered with green, and fish enter the peak period of appetite. Crucian carp, carp, bream, bream, black carp, grass carp, silver carp, bighead carp, catfish, mullet, mandarin fish, etc. begin to flock to the affiliated water bodies connected to rivers, lakes and ponds. At this time, use meat baits or vegetarian baits with good color, fragrance and taste to spread and fish. As long as the taste is suitable, fish will rush to eat and bite frequently.

June is the rainy season in the south. It is rainy and cloudy, and the dissolved oxygen in the water increases greatly, making the fish particularly active. Although the temperature is high at this time, it is not too hot. Crucian carp is the best to fish, followed by carp. However, bream, whale and grass carp have a lower bite rate than other months because of the fresh and abundant water plants and sufficient food.

July is scorching hot, with hot winds and rainstorms coming one after another. The weather is unpredictable. Crucian carp, carp, grass carp, bream, black carp, etc. all return to deep waters to "escape the heat", making it difficult to catch them on the shore. The fish in artificial breeding ponds also have a poor appetite due to lack of oxygen in the water. This is the off-season for fishing in the year. It is best to fish in the early morning and evening. Silver carp and bighead carp are not afraid of the heat. As long as you use sour and smelly bait and avoid the hottest time at noon, the rate of catching them is higher than other fish.

August is the second golden fishing season of the year, when fish enter their second peak feeding period. Grain crops are harvested and the seeds scattered on the ground flow into rivers, creating a spectacular scene of hundreds of fish approaching the shore to compete for food. As a result, the fish are large, making it a good time to fish in rivers. Using earthworms, oil gourds, ants, rice grains, tender corn, etc. as bait, fishing at the lakeside or reservoir late into the night will yield a good harvest.

September is the golden autumn, the temperature drops, and the summer heat disappears. It is a good time for boat fishing. Using shrimp and snail meat as bait to catch crucian carp, carp, bream, bream, and black carp, or using sour and smelly bait to float fish for silver carp and bighead carp will greatly exceed shore fishing. At this time, you can often catch big carp and grass carp by using a sea rod to cast far. Fishing in the breeding farm, whether using a hand rod or a sea rod, can achieve good results. "

October is a golden time for fishing in rivers and lakes. Stream fishing is useless because the streams are dry. Fishing crucian carp, carp, and bream with plain river water is the best. Fishing mullet, catfish, and yellow eel with the leftovers of poultry and livestock mixed with drum skin and rice bran is quite effective. However, most fish swim to deep waters to "avoid the cold" at this time, so it is difficult to catch them on the shore of the reservoir. However, using a sea rod to cast into deep waters can catch big carp, black carp, and bream. Earthworms, green shrimps, and snail meat are the best baits for fishing. Fishing with pasta and fermented food is very ineffective. Fishing in a farm with earthworms and red worms as bait, if the fish pond is not large, can also catch crucian carp and carp. Grass carp and silver carp. Bighead carp will no longer bite the hook due to the low temperature. In large fish ponds, the water temperature is low and the fish are not active, so fishing with hand rods or sea rods has little effect.

In November, the north wind blows hard, frost falls on the earth, the grass and trees wither, insects and fish are about to rest, eels, loaches, and turtles have all hibernated in the mud. Catfish, yellow catfish, bird fish, mandarin fish, etc. hide at the bottom of the water and stop moving. Only crucian carp, carp, bream, bream, Spanish mackerel, and pike can still move and eat on a sunny day, and can be caught. Earthworms and shrimp meat are the best baits, and snail meat is favored by black carp. Using a string hook to hang a variety of meat baits has a good fishing effect; using a bomb hook to hang rotten food has a very poor fishing effect.

December is a good time for ice fishing in the north, when the north wind howls and the mountains are covered with snow. At this time, you can use red worms and earthworms to catch crucian carp, carp, bream, bream and pike, etc. The above analysis is only for reference for the fishing trips of fish lovers.

carp

Winters in the south aren't too cold, so there isn't much difference.

grass carp