CATDOLL : CATDOLL: What are the precautions for breeding freshwater white pomfret fry? What are the precautions for breeding freshwater white pomfret fry?

1. What are the precautions for cultivating freshwater white pomfret fry? What are the precautions for cultivating freshwater white pomfret fry?

1. As freshwater silver pomfret has a varied diet, grows fast, is less susceptible to diseases, likes to live in groups, and is particularly sensitive to certain organophosphorus drugs (such as trichlorfon, malachite green, etc.), it should be cultivated in special ponds from the perspective of fish disease prevention and control. In addition, freshwater silver pomfret, whether fry or adult, prefers to "sink to the bottom" and "drill" the bottom of the net or pond when caught. If other fish are mixed, it is often easy to get hurt because of its fine scales if you want to separate the fry. In order to reduce unnecessary losses and facilitate the growth and development of fry, cultivating the fry in special ponds is more beneficial than harmful.

2. The pond for cultivating freshwater silver pomfret fry is generally 1-2 mu in area and 80-100 cm in water depth. Requirements: The pond should be disinfected 5-6 days before the fry are put into the pond (the method of poisoning the pond is the same as that of cultivating other fry, which can be done with quicklime, tea bran, strong chlorine, etc.), and the pond water should be stable and leak-proof. Since the freshwater silver pomfret is small in the blooming stage and has a stronger tolerance to low oxygen than other fish, the stocking density can be appropriately larger, with 200,000 to 300,000 healthy fish blooms per mu of water surface.

3. Start feeding freshwater silver pomfret fry on the second day after they are dropped into the pond. Since the fish are tender and small, they mainly feed on zooplankton in the pond, but they need to be fed with a certain amount of high-protein and fine-grained slurry feed, such as egg yolk or soy milk. In general, egg yolk (chicken or duck) is easy to source and has a better effect. The method is: start with 1 egg per 10,000 fish per day (2 eggs after 3-4 days), boil the eggs first, then remove the shells and egg whites, and use dense filter yarn to mix with water (2-3 kg) to knead the remaining cooked egg yolk into a slurry, and spray it evenly in the pond in the morning and afternoon. In addition, the cultivation pond should be properly piled with some perishable chrysanthemum (big grass) or stinkweed, so that the transparency of the pond water remains at 20-25 cm, reaching good water quality standards.

4. After 6-7 days of egg yolk feeding, freshwater silver pomfret grows to 4-5 days old (about 1.2 cm in total length). At this time, you can stop feeding egg yolk and start feeding fine powdered mixed feed with high protein content. At present, most mixed feeds are composed of soybeans, peanut bran, wheat bran, etc., with a proportion of 40%, 30%, and 30% respectively. The daily feeding amount is 0.5 kg per 10,000 fry at the beginning and 1.5 kg later. Increase gradually and control flexibly. Feeding method: First weigh the crushed mixed feed, then use water to make it into a slurry, and evenly sprinkle it in the whole pond in the morning and afternoon.

5. Although freshwater silver pomfret is less susceptible to diseases than domestic fish, once it is infected, it will be very aggressive and have a high mortality rate. For the health of the fry and to reduce losses, it is necessary to do a good job of prevention. First, during the fry cultivation stage (especially before the fry are 6-7 days old), be careful to prevent the fry from floating seriously. For example, in the early morning of hot and humid weather or before a storm, you should patrol the pond frequently and remove the grass residue in the pond in time. Once you find any abnormal behavior of the pond fish, immediately inject new water or take other oxygenation measures. Secondly, freshwater silver pomfret is prone to fish diseases caused by parasites (such as Ichthyophthirius, Dactylopius, Trichodina, etc.). The symptoms are generally obvious: at the beginning, the fish group together and cannot be driven away; then (about half a day later) the tail fins of the weaker fry are bitten and they begin to die gradually. If it is not treated at this time, the mortality rate of infected fish will reach more than 80%, and even the entire pond will be submerged.

6. After 20-25 days of breeding, the freshwater silver pomfret has grown its lamellae, the lateral line is complete, and the body surface has color. The body length and weight have increased by 4-5 times. If it is not divided into ponds or sold in time, the density is too high and the feed is insufficient, the survival rate will be seriously affected. In order to ensure the normal growth and development of the fry and improve the survival rate, it is necessary to divide the ponds or sell them in time.

2. What are the essential differences between white pomfret and black pomfret?

1. Different Aliases

Silver pomfret: scientific name is Carcharodon carpio, also known as freshwater silver pomfret.

Black pomfret: commonly known as black pomfret, iron plate pomfret, and black-scaled pomfret.

2. Differences in the divisional regions

Silver Pomfret: Native to the Amazon River in South America, it is a tropical and subtropical fish.

Black Pomfret: Distributed from the northern coast of the Indian Ocean to North Korea, Japan and the coast of China, it is a tropical and subtropical pelagic fish. It generally lives in clear waters.

3. Different appearance

White Pomfret:

The body is approximately triangular, very flattened. The dorsal margin is shallowly arc-shaped; the ventral margin is deeply arc-shaped, sharp and thin like a knife. The mouth is small and anterior, almost vertical. The body is covered with tiny scales, which are not easy to detect. The lateral line is incomplete and divided into two branches. The base of the dorsal fin is longer than the dorsal fin, and most of the fin rays are buried under the skin, with only the end exposed. The pelvic fin rays are slender. The caudal fin is forked.

Black Pomfret:

The body is oval, high and laterally flattened, and can reach more than 40 cm in length. The dorsal and ventral margins are very convex, the head is small, the snout is short, the mouth is small, the teeth on both jaws are thin and pointed, and the gill rakers are thick and short. The body is covered with small round scales, which are dark brown. The lateral line is obvious and slightly arc-shaped, and the lateral line scales on the caudal peduncle are larger, forming a raised ridge.

3. How to catch freshwater pomfret?

Question 1: How to fish for white pomfret? In spring, when the temperature in Lingnan is between 19 and 26℃, white pomfret in many small reservoirs, lakes, and large mountain ponds swim and search for food. Their mobility is similar to that of carp and crucian carp. The fish is active, grows fast, and swims and scrambles for food very fiercely. The fishing method is as follows: 1. Pre-position the bait and spread it in a nest: white pomfret has a wide range of food. It eats small fish, pond shrimp, insects, earthworms, silkworms and other meat baits, as well as rice, peanuts, bean dregs, corn, bean cakes, distiller's grains, soybeans, etc. The best hook baits to choose from are: ① live red earthworms and black earthworms; ② live silkworms, bee pupae, small loaches, small breams, small fish, etc. Secondly, mixed hook baits can be used: ① steamed cornmeal steamed bread, mixed with fried peanut powder, fried soybean powder, and shrimp powder, kneaded into a ball as bait. You can use cut rice cubes as bait, or you can use wine dregs, mix them with steamed corn meal, fish meal, shrimp meal and sesame meal and knead them into a ball to make bait.

2. Choose the right fishing gear: White pomfret is native to the Amazon River Basin in South America. The fish has two rows of very sharp teeth on its upper and lower jaws, which can cut food like a knife or a saw. It is best to tie the hook with super strong fishing line to prevent the fishing line from being bitten off. To catch large white pomfret, it is best to use four or five 2.4-2.7 meter hard-tuned casting rods; the fishing line should be eight or nine pounds; the fish hook should be a long-handled large fish hook of size 10-14.

3. Fishing skills: When the white pomfret takes the hook and you pull the rod, you should quickly lift the rod and pull it to the surface of the water. Use a scoop net to bring the large pomfret ashore; the small ones can be thrown ashore. When you encounter a larger white pomfret, it will rush left and right with great force, and it will be easy to break the line if you pull it hard. You can patiently walk it for a few rounds, and when it has no strength left, use a scoop net to bring it ashore.

Question 2: What bait should I use for fishing for pomfret (freshwater) 1. Fresh pork liver. (Depends on the size of the fish being caught, generally peanut-sized is OK)

2. Chicken and duck intestines, suitable for fishing large pomfret (more than 2 jin).

3. Earthworms.

4. Small fish.

Best fishing method: Luya

When fishing, pay attention to teasing, it is best to use a long-handled fish hook (easy to remove the hook) + anti-bite line.

Question 3: What bait should be used for fishing pomfret? 1. Fresh pork liver. (Depends on the size of the fish being caught, usually peanut-sized is OK)

2. Chicken and duck intestines, suitable for fishing large pomfret (more than 2 jin).

3. Earthworms.

4. Small fish.

Best fishing method: Luya

When fishing, pay attention to teasing, it is best to use a long-handled fish hook (easy to remove the hook) + anti-bite line.

Accepted, thank you

Question 4: Is it better to fish for white pomfret at night or during the day? The main fishing methods for white pomfret are fixed-point feeding, bottom fishing or floating fishing. The rod and line structure should be a straight rod and line structure, and the line group should be a bottom sinker or a suspended sinker structure. The fishing rod should be a 3.6-6.3 meter hard-adjusted hand rod. If you need to fish in flowing water, you can choose running float fishing or dull tip fishing, and the line group should be a string hook structure.

Silver pomfret has teeth and can easily bite off the sub-line, so you should try to protect it. You can use multiple strands of nylon soft line as the sub-line, or adopt other silver pomfret fishing methods.

Silver pomfret has a very sensitive sense of smell and eats fiercely and quickly. The signal of swallowing the hook is very clear, so it is not too late to lift the rod.

First, prevent it from swallowing the hook too deep, which makes it difficult to remove the hook; second, prevent it from biting off or injuring the sub-line. In addition, the palate of the white pomfret is very hard, and the hook tip is not easy to penetrate. When lifting the rod, you should increase the shaking of the wrist. When a large white pomfret is hooked, you should be prepared to walk the fish, and you should not rush for success. Also, pay attention to the hard and sharp dorsal fin of the white pomfret. Be careful when catching the fish with your hands. It is best to wear gloves or use a towel. Do not put your fingers into the fish's mouth when removing the hook.

Since the white pomfret is very powerful and struggles hard and persistently after being hooked, hand-pole fishing for white pomfret is very suitable. However, if the fish is too large (for example, weighing more than 1 kg), it is not suitable to use hand-pole fishing.

Question 5: I often go fishing in my friend's pond. But there are freshwater pomfret in his pond. They eat almost everything, including corn. Generally, fishing tackle shops sell these. If you tell him what kind of fish you want to catch, he will help you prepare it. The price is very cheap, from a few yuan to more than ten yuan.

Question 6: Which fishy bait is better for freshwater silver pomfret? Also, ordinary fishing line cannot be used, because silver pomfret is a carnivorous fish species with sharp teeth, which can even leave marks on lead.

Question 7: What should I feed freshwater pomfret? Freshwater pomfret is an omnivorous fish with a well-developed digestive system. It has an enlarged stomach and pyloric sac that carnivorous fish have. It eats animal feeds such as small fish, shrimps and benthic animals, as well as plant feeds such as aquatic plants, vegetables and algae. (As an ornamental fish, it can be fed with water worms)

Under artificial breeding conditions, peanut bran, bean cake and compound feed can be fed. In the fry stage, the main food is diatoms, dinoflagellates and other single-cell algae, as well as rotifers, cladocerans, copepods and other zooplankton. It has been observed that the newly hatched fry are nourished by egg yolk, and the intestinal tube is formed after 4 to 5 days. When it grows to 5.6 mm, it begins to eat plankton, mainly small monosporic algae and rotifers. When the total length is about 16 mm, the food in its digestive tract is mainly Daphnia; when the total length is 4 to 5 cm, the food in the stomach and intestines is mainly Daphnia and cladocerans; when the total length is about 6 cm, the food composition in the digestive tract includes various plankton, plant debris and artificial feed. When the total length is more than 7 cm, its food composition is mainly various plant debris and fed feed. Therefore, the fry stage mainly feeds on plankton.

Question 8: Is pomfret a saltwater fish or a freshwater fish?

Question 9: How to make freshwater pomfret chewy? So-called freshwater pomfret is mainly freshwater fish of the genus Piranha of the family Characidae, such as freshwater white pomfret and red-bellied piranha, which are found in the Amazon. The meat of this kind of fish is relatively coarse, with a high fat content and a fishy smell. The best way to cook this kind of fish is actually to grill it like the indigenous people do. It is best to marinate it with heavy ingredients, wrap it in tin foil, and grill it over charcoal. The basic cooking principle is to marinate it with heavy ingredients, then bake or fry it to dehydrate it to a moderate degree of dryness.

Question 10: What are the favorite foods of freshwater pomfret? You are probably asking about bait. : 1. Fresh pork liver. (Depends on the size of the fish being caught, generally peanut-sized is OK) 2. Chicken and duck intestines, suitable for catching large pomfret (more than 2 jin). 3. Earthworms. 4. Small fish. Best fishing method: Pay attention to teasing when fishing with lures, and it is best to use a long-handled fish hook (easy to remove the hook) + anti-bite line.